Jin-Yi Yu: So let me continue to
Jin-Yi Yu: Finish that discussion of our chapter one. The property of power of the hour thermosphere so as now already mentioned that we are going to be the case for Kibera. What are we need to
Jin-Yi Yu: Major in the show you now weather map temperature, humidity, pressure and and when. And as I already explained what is the
Jin-Yi Yu: Fiscal meaning of temperature and what is is in it and and what is is value in hot weather NSA is and before before the end of the Tuesday lecture I was talking about the second variable, the pressure
Jin-Yi Yu: So it has co pattern. So as I mentioned already process pressure is important for us because in what I analysis, we need to know in which area we can preserve hello pressure which area. We also high pressure and high pressure area is the clear sky and good weather.
Jin-Yi Yu: And while the low pressure area around our area, we are supposed to see a bit way there, or most of the
Jin-Yi Yu: hazardous weather that we're going to discuss in this class is quarter. So it's important we know what the pressure means and what unit. The pressure is is used for its measurement. And I think, as I mentioned last night, the pressure basically represent the, the total the weight of the
Jin-Yi Yu: Atmosphere.
Jin-Yi Yu: From the whole cotton above the area we measuring the pressure we measure a pressure here in Denver, then the pressure in our location is produced by the weight of the air above
Jin-Yi Yu: Then all the way to the top of the this is top of the sphere.
Jin-Yi Yu: So, and we also have mentioned us on Tuesday that the the typical uni, we use to to represent the pressure is the minibar
Jin-Yi Yu: And this is the way we measure the
Jin-Yi Yu: Pressure
Jin-Yi Yu: And when we construct what a map to show
Jin-Yi Yu: For example is unite North America, South America, and then we want to measure the pressure at the various different location of the war and we realize that the
Jin-Yi Yu: The human being is leaving on a surface which has elevation has as the topography. So the pressure we measured at the surface of a surface pressure
Jin-Yi Yu: At a point A.
Jin-Yi Yu: And the surface pressure we made a point be can be affected by the local topography. So for example, the location of a is very close to sea level. So the surface pressure here is equal to see variable.
Jin-Yi Yu: Pressure
Jin-Yi Yu: Which are we scored as LP sea level pressure right but when we major the surface pressure here the surface pressure
Jin-Yi Yu: And point b is not equal to Syria or pressure because the weather station at point B is
Jin-Yi Yu: Way above the sea level. So we need to do the weather map and then. So in this case,
Jin-Yi Yu: The pressure at that point. But station be is always low pressure because the cardinal air must be a published point is much, much shorter in a column of air above point A.
Jin-Yi Yu: So if you just compare these the pressure surface pressure major a point at which these the surface pressure major point B, the pressure point A is always Roger them.
Jin-Yi Yu: Pressure point B and then you always going to get a high pressure here and no pressure here at point B. And that's not what we want.
Jin-Yi Yu: Because this low and high pressure, tell us nothing about whether in in point A and point B. So in order to you eliminate the influence of aggravation and our pressure measurement
Jin-Yi Yu: When we construct the weather map. We always adjust our surface measurement of pressure to a reference table that's called sea level, right. So, for example, a
Jin-Yi Yu: Station. A is elevation above senior was very small sold a service pressure is equal to silver pressure for every location be
Jin-Yi Yu: If we know the mountain. For example, this mountain is for example five kilometer, for example, just as it is. And then if we measure the local service pressure at this station P is 500 minibar, for example, then when we report.
Jin-Yi Yu: Then we prophesied about pressure map. We need to correct this pressure to see devil, and we know that I'm a witch. The pressure change with high is about every one kilometer we go up. We are going to
Jin-Yi Yu: Last decrease minibar. So in this case, for example, if this mountain is 400 kilometer and we measure on the top of the mountain. The pressure is 500 minibar then we can, we need to adjust his pressure to sea level is sort of see them a pressure will be equal to 500 minibar priced
Jin-Yi Yu: We have four kilometer and every times a week one kilometer co op will come to decrease one means 100 me but so we'll go down, meaning increase. So the final
Jin-Yi Yu: Pressure pressure be 500 minibar plus 400 additional 400 me back. So we will report this location, be the see the surface pressure is actually my country me back. Okay, so this is what these
Jin-Yi Yu: Slides tell you. Okay. Because pressure decrease with high recording actual pressure may be misleading. As a result, because all this pressure we measurement can be
Jin-Yi Yu: Affected by the elevation of your weather station so all recording station. I read deals to see their blood pressure equipment. So we need to adjust the
Jin-Yi Yu: Measurement to sit able to facilitate horizontal comparison.
Jin-Yi Yu: Right. Only when we are correct to the same reference level, then we can decide whether we are going to have a low pressure here high pressure here. Or actually, we have high pressure here and no pressure here.
Jin-Yi Yu: Right, so a all these pressure measurement at what a station has to be corrected to refers sea level.
Jin-Yi Yu: And the way we do the correction or adjustment is based on this fact, the pressure will decrease.
Jin-Yi Yu: Or change about 100 me back at one kilometer we go up in tank in the in the in the marine industry atmosphere but he caught up one kilometer.
Jin-Yi Yu: The pressure. Well, reduced by 100 minibar movie called on one kilometer in most fear the price you increased by 100 amoeba. So, this information is the key information we use to do this pressure correction for elevation. OK, so now continue
Jin-Yi Yu: Based on the fact that the pressure is going to decrease with high we go high and high in the sky can can can surface five kilometer one kilometer. So here is what we care. We started or the weather inside is troposphere.
Jin-Yi Yu: Funds surface to about 10 kilometer. So inside here, we can see that the pressure will decrease from nowhere near the surface is about one me change to the other car.
Jin-Yi Yu: The surface is about 1000 mini back when we go to top of the tropopause is about 203 minibar here.
Jin-Yi Yu: So we can see that for out whether NSA is
Jin-Yi Yu: For a purpose, whether MS is we want to know our temperature our humanity. Our when between 1000 minibar to 200 meaningful and that's what this number, try to tell you. So when we do whether NSA is we need to find out how we
Jin-Yi Yu: Look like near the surface. So we need to draw a surface. What a map right this is North America, South America, Australia, Europe, and then we need to find out how pressure
Jin-Yi Yu: High pressure low pressure loop back in this man and this map is called
Jin-Yi Yu: Surface.
Jin-Yi Yu: weather map seminary, we also need to find out the weather condition as I say whether enhances care about happened between one sodomy back to about 200 minibar we have weather happening here.
Jin-Yi Yu: So besides in addition to have surface weather map. We also need to know how the weather pattern loop right
Jin-Yi Yu: Between one sounds me by 200 amoeba. That's where we see here. Usually we beside looking at a surface where I'm at. We also try to find out 200 million
Jin-Yi Yu: What a map. We also need to find out 500 amoeba. What a map. We also need a fighter 150 million back when a man. Okay, so in the rest of this class will discuss apple
Jin-Yi Yu: Apple troposphere weather condition you use, you will look at 200 you mean about where I'm at 300 me about what a man in the middle at a must mean though.
Jin-Yi Yu: troposphere.
Jin-Yi Yu: What a map is always use 500 me back. So all these many past smaller and find the amoeba is consider us apple
Jin-Yi Yu: troposphere.
Jin-Yi Yu: Whether Mac.
Jin-Yi Yu: And 500 amoeba is considered as mito troposphere. What a man and any bigger value.
Jin-Yi Yu: Is consider us Nia surface.
Jin-Yi Yu: Or door.
Jin-Yi Yu: troposphere.
Jin-Yi Yu: weather map. Okay, so this is another important information to remember. Right now we are going to see very often, all these were pressure value because our weather ennis's is going to be conducted using weather map from those
Jin-Yi Yu: Pressure surface. Okay.
Jin-Yi Yu: Now, this is what I showed last time when we practice a weather map. So this one is surface where I'm at, because you can see this pressure very somewhere around 980 minutes
Jin-Yi Yu: To somewhere or 1000 minibar right so last time I already explained after we measure. So basically in early time this
Jin-Yi Yu: meteorologist, the first thing they need to do is after. For example, you have weather station report here, the pressure is 1010 tip.
Jin-Yi Yu: Tim minibar here and then in Irvine here, the pressure, the weather station report the repression once sodden 25 minute bar and then in the other location here, for example.
Jin-Yi Yu: Report or a separate one. This one here. Your report a pressure equal to 970 minute back. So now you have, for example, and then you have another point here. Let's maybe is 1015 mini bar and here is, let's say here.
Jin-Yi Yu: Yeah, but this so you only have 12344 point and the early in early data meteorology, the first job, I need to do is they need to find a face on this for value.
Jin-Yi Yu: Then you're going to draw or is pregnant.
Jin-Yi Yu: And then you complete the whole map like this. So this whole map all is man he is actually based on very few, a few
Jin-Yi Yu: Data points, but we connect all these values together to get a more comprehensive comprehensive information about pressure and that's why all these come tonight.
Jin-Yi Yu: Is how we classify is very useful because you only need to have a future state very sparse.
Jin-Yi Yu: Weather Station, or you can get very detailed information about the pressure across the United States. And based on this.
Jin-Yi Yu: Pressure night. You can tell people that in this particular example, we are going to have a pet weather in the New England area because there is no pressure.
Jin-Yi Yu: And and California region has a very, very good weather because he has high pressure and supposed to be very hot. Okay, that's the beauty of pressure because pressure doesn't change in space, very quickly.
Jin-Yi Yu: The pressure changes slowly because you remember pressure meaning mean how much mass, the weight of the air produced and service. So listen passport are this will change.
Jin-Yi Yu: Decrease and decrease co op this very quickly. The pressure is a mess. So is variation in space must be very, very gentle very slowly and that's why
Jin-Yi Yu: We such a gentle slowly change. You don't need a simple very frequently, just check choose observe at this point.
Jin-Yi Yu: Observed at this point. And in between. You don't need to do as evasion, because you know the pressure is going to change slowly.
Jin-Yi Yu: And that's why we can always produce this very informative. What I meant to do with an emphasis. That's the importance of pressure and as I already told you the other important thing about pressure is how quickly pressure
Jin-Yi Yu: decrease or increase in space and that
Jin-Yi Yu: The real pressure change in space is called pressure gradient in his presence gradients Condor because different ways going to producing a pushing
Jin-Yi Yu: Force and his force. You could try win. And that's why, how quickly this pressure change in space is very important for us.
Jin-Yi Yu: To figure out how strong or how we know wins are in which direction wins go so pressure is so tell us where the high pressure low pressure is so we know where the weather weather are located and pressure trends in space.
Jin-Yi Yu: Is called pressure gradient tell us which way when bro, and how strong we will are in that particular location.
Jin-Yi Yu: Okay, so
Jin-Yi Yu: Here.
Jin-Yi Yu: This is what a map average. This is average over many, many, many, many, many years, and only the sum of from the past 50 years he can see that we are here in the United States.
Jin-Yi Yu: You see that this is a summer. So this is not a weatherman. This is not a matter
Jin-Yi Yu: Because this is many, many hundreds of what a man a fish together. This is a crime in math.
Jin-Yi Yu: Or you can call it high me the cheap right so this one kill. So this is not important for our end. So I want to take this opportunity to let you know what we learn from this one. So, usually in the summer time in the summer hemisphere, for example in northern hemisphere. In this case,
Jin-Yi Yu: See, what did you see in the summertime, you always get a high pressure over subtropical Horsham in Nia Hawaii bitcoin, how are you. Hi.
Jin-Yi Yu: In Atlantic Ocean. We call it moto arrows. Hi Pamela hi in that in the summertime, and you need in a high dollar deal. There's no from sickness. But when you go to winter time.
Jin-Yi Yu: January, for example, you see, again, this is equator.
Jin-Yi Yu: In the, in the summertime. We got a lot of high pressure sitting in a subtropical issue, but in the wintertime you see
Jin-Yi Yu: This. How are you nice shrink to very small the promoter height is shrink to a smaller value compared to the
Jin-Yi Yu: Next summer is so big, how are you. Hi, I'm outta high, but in the winter history too small. So in the winter. Most important thing is you have low pressure
Jin-Yi Yu: Very, very strong pressure in a Pacific or audio Sandow very strong pressure in Atlantic or ashram Piccolo, you can see when you come to the summertime.
Jin-Yi Yu: This low basic Disappear, disappear. Right. So that's why why I mentioned is because in the winter time when we studied the weather and the most important is winter storm.
Jin-Yi Yu: And winter storm. We are the winners TOMO is control by are you single in Pacific is ranked Lego in Atlantic because of what we have
Jin-Yi Yu: When the stone upon in near Japan is going to be where it's going to come, which area going to them in a year in the United States is control by how strong how we
Jin-Yi Yu: Have this our user know and each location. Okay, so for the winter time when I NS is we need to know where the audience and old is located and how strong it is. And I standard or locating how strong it is. But in the summertime. What is the most important summer weather phenomena.
Jin-Yi Yu: One of them is
Jin-Yi Yu: Python or Harry can perform a hurry can happen type home. He is the name of tropical cycle cycle in the Pacific Ocean region. So when we have high from here, the time is always move from
Jin-Yi Yu: East West come to Taiwan, Japan, China or Vietnam sometime motivated. I'm some time to to Japan and where you go to North
Jin-Yi Yu: Korea, Japan or move the South to Vienna depends on where the subtropical house is located. How strongly because subtropical high high price always alternate clockwise
Jin-Yi Yu: So always carry this American tire from from east to west and if this tropical hot in that one particular summer is particularly strong
Jin-Yi Yu: Indicator more to the higher, higher, higher latitudes, then this time phone will be carry by this subtropical hard to move to Korea in China or Korea and Japan, but in the other case, if the
Jin-Yi Yu: Subtropical is very weak all carry more out of South
Jin-Yi Yu: Beach.
Jin-Yi Yu: Then last hurricane Taiwan will be moved to power, Vietnam, and the same thing happened in the hurricane.
Jin-Yi Yu: Hurricane is going to make landfall in in East Coast of the United States depends on this. My mother. Hi. So if we do the summer time hurry can retire from forecasting or analysis, you have to pay attention to where this Pamela. Hi, where it is.
Jin-Yi Yu: How I in high are located in performance winter weather and he says we need to find out where and how strong the additional located and how strong it is similar to Atlantic. That's important. The other important thing about pressure. Okay, so now this is
Jin-Yi Yu: Animation because tell you the rainfall happen every month from 1979 to 2023 every two together. So these methods and show individual you just encourage these parents have ears or rainfall for each calendar month, January, February, March, so you can see that this equation.
Jin-Yi Yu: Right, very red one means a lot of info. So you can see the important River in a tropical region between factory salsa in us here is related is monsoon CC
Jin-Yi Yu: Read or move to Australia in August, June, July, August, Mo in December, January, February, and immortal India during June, June, July, August when equal to
Jin-Yi Yu: December, January, February, rainfall move to Australia. So this is monsoon. So in a tropical region most important rainfall
Jin-Yi Yu: Pattern is controlled by this weather phenomena we call monsoon and this very rare. One is called into Tropical converging on which I'm not going to talk about it because it's not important for our weather MSS class before in the meat and it region. See here.
Jin-Yi Yu: BETWEEN SAUDI Saudi Saudi nose and $16 you can see we have this right coming up on where this is Japan.
Jin-Yi Yu: Yeah, he's a united state here.
Jin-Yi Yu: So you see this red always move from outside Japan. The move all the way to Pacific Northwest, and this is our
Jin-Yi Yu: Winter Storm.
Jin-Yi Yu: Track
Jin-Yi Yu: A. See, here is our United States.
Jin-Yi Yu: You can see that we have an auto
Jin-Yi Yu: Read coming on the site.
Jin-Yi Yu: And but on occasion issue also we can see also this around for
Jin-Yi Yu: See me or is queen area that's another Buddhist on track. Now I mentioned
Jin-Yi Yu: On Tuesday, okay, not as convenient after we have pressure. We're going to produce when and when
Jin-Yi Yu: Is because pressure produced pressure
Jin-Yi Yu: radium
Jin-Yi Yu: And pressure gradient produce perpetual gradient, false, false contract when and this pies. Very simple. Okay, we just tell you which way the air molecules are moving right and the most important thing you need to know is that
Jin-Yi Yu: In the unit of the when, in when NSA is most often very often uses coordinates, of course, we also use my power of mean meter per second and whatnot, is equal to almost
Jin-Yi Yu: One mile per hour, hour and about only have 0.5 mile per second. But the other important thing you need to know is that in meteorology, when we say when
Jin-Yi Yu: Is three when
Jin-Yi Yu: Or West 30 when the direction of this when
Jin-Yi Yu: The direction is really to where the wind come from. So when direction always indicate a direction where we come from, for example, this one. He is the east.
Jin-Yi Yu: is worse than this instrument. Tell us who is calling this way. So this way is this one is called East 31 okay so immature, it will repay.
Jin-Yi Yu: That direction. Are we face, and we come from this. This is opposite from oceanography oceanographer ocean in the ocean. Which way to all the direction when the Oscar move tool.
Jin-Yi Yu: Is always we always say he or she is moving in this direction, the same as when we call this or in Portugal coin West award.
Jin-Yi Yu: Current
Jin-Yi Yu: And the same direction of a moment is way we call
Jin-Yi Yu: Is to the win so far. When is always referred to the correct one come from for ocean Clarion is also referred to the direction ocean core core is going to go to. Okay.
Jin-Yi Yu: And the other important thing about this will measurement is that you can see that in order to measure the when we need to measure that this instrument.
Jin-Yi Yu: Is high enough so the only imagine is not will not interfere by our building by our by tree. We want to make sure we manage others when surface when
Jin-Yi Yu: In an attitude that is not interfere by topography of building on a surface in order to achieve that goal. The official measurement of when at a surface always made at an elevation about 10 meter. So this is important concept to remember
Jin-Yi Yu: All the surface we measure money was is taken at 10 meter above surface and these high is called and now meter high because another meter is the instrument we use to measure the wind direction and wind speed. Okay.
Jin-Yi Yu: So here is an example. So in what a map, you see that we always one circle means we have weather station here and the wind is coming from which direction this is South East right
Jin-Yi Yu: Here. So this is winterizing coming from here come from here, so
Jin-Yi Yu: This is telling you that you wouldn't coming from north, and we thought we should go to respect. Okay.
Jin-Yi Yu: Now let's go to the last part. So every spring temperature, pressure when copy. Now I want to explain humility. So again, let's say, one is the physical meaning of humanity. What is unit.
Jin-Yi Yu: Why is it important
Jin-Yi Yu: To whether innocence net so definition. What is humility. Humility is a man or water vapor carry in the air. So everybody know that
Jin-Yi Yu: And
Jin-Yi Yu: Why it is important to whether because humility means vapor water vapor and water vapor
Jin-Yi Yu: Clinical one one, I must water vapor is near the surface because nearest service. We have ocean we have power. We are river so water can evaporate become other way for water vapor for the way for wallpaper for her least what I'm a pocket carry
Jin-Yi Yu: Up in the sky and cuckoo damn your produce condensation and all these combination will show us how right become visible and that's where we realize or recognize
Jin-Yi Yu: The weather is happening. And then when these cow produce enough colonization, you will produce rainfall photon become rain.
Jin-Yi Yu: Or snow so humility is important for our winner. And this is because this is a quantity that is going to control how visible or or
Jin-Yi Yu: Or basically this this this variable is going to control how outward and look like for me to know humility and the most complicated part of this chapter is going to show up in our next few slides because meteorology us a very interesting, isn't it, to
Jin-Yi Yu: disquiet a quantity of water vapor so
Jin-Yi Yu: Traditionally, or in physics in physics we use vapor pressure to describe the amount of water vapor, we have in the air right sort of a container Marshall can be major by the pressure exerted by the water vapor in the air. So if you have more example or is water vapor
Jin-Yi Yu: Molecule missed one grade in 2.1 rate to what we have 1-234-567-8910 11 or water vapor molecule inside this parcel.
Jin-Yi Yu: In the green one is not so much in in marijuana oxygen. So, depends on inside this area. How many water vapor. We have the more water vapor. We have the
Jin-Yi Yu: higher pressure is going to be produced by water vapor. And so we can use. We can measure the vapor pressure to quantify how much water vapor, we have in the atmosphere. Okay. But meteorology doesn't want to do that media. So this one, we're not doing that. So here it is inside
Jin-Yi Yu: You see that he tell you in what am I will tell you the amount of water vapor. We have over the United States and the unit is too many pounds for me back. Right. So to me about what does
Jin-Yi Yu: That mean means the amount of water vapor in this location is going to produce a pressure equal to two minutes, so you can tell from this slide. So our panel is the
Jin-Yi Yu: January when the time lower panel is July or the vapor pressure in the summer. If you compare the upper and lower panel. You notice that in the winter time, the vapor pressure very, very smart. Too many
Jin-Yi Yu: For me, and the most go to go to New York, Miami areas come to me back. But when we go to the summer depression value increase significantly become 14 minibar even in the same location here.
Jin-Yi Yu: Is for me purpose in the summer is coming. So what's the reason for that because how much water vapor, we
Jin-Yi Yu: Have in our air our control by two factor first is how close our location is to the source of water, right. So for example, if you are in the desert region Arizona me water vapor
Jin-Yi Yu: The vapor pressure more moisture humidity is
Jin-Yi Yu: Is going to be law.
Jin-Yi Yu: And the other
Jin-Yi Yu: Factor the cancer. How much water vapor. We can observe in any location is
Jin-Yi Yu: The how warm or cold air temperature is okay so this one you can tell
Jin-Yi Yu: We may put pressure distribution is
Jin-Yi Yu: Similar to me this is not one
Jin-Yi Yu: Actually
Jin-Yi Yu: I say this figure, try to tell you the second way we are going to, it's the second unit we're going to use to represent the water vapor. So we can use the minibar mythological want to practice humility information in when a map fake by
Jin-Yi Yu: Fahrenheit fahrenheit is a unit for temperature for how come meteorology expressed the humidity.
Jin-Yi Yu: Quantity value in a temperature unit. That's the most important. We're going to explain. So here you can see that this
Jin-Yi Yu: Temperature unit is called two point temperature. Okay, so I think I confuse you can use like let me make it clear here. So the reason is because we know from physics that how much water vapor air can carry is related to how warm or cold, the
Jin-Yi Yu: The air temperature is the warmer air, the more water vapor in the air can hope and the lower the temperature, then the last part of a prayer can hope. So if you end up
Jin-Yi Yu: The relation between the maximum amount of water vapor. A can hope in the temperature of the air is described by this equation call houses crap around equation. Okay, so that's
Jin-Yi Yu: summary about this mathematical formula. Now listen, I want to tell you is that the physics already tell us the maximum amount of water vapor and air can hope.
Jin-Yi Yu: Showing why access is related to is the temperature of the air showing X coordinate in a in this particular formula. And this particular formula.
Jin-Yi Yu: Can be expressed as this night is Ray Knight. OK, so the field of beauty of this equation is that if you measure the water vapor among in urban today and you find out the one weapon or by today's 20 minute back then you know that
Jin-Yi Yu: The list causes copper bronze to your question to start this water vapor, a monk.
Jin-Yi Yu: Is equal to the maxima.
Jin-Yi Yu: Among
Jin-Yi Yu: All water vapor. The atmosphere can
Jin-Yi Yu: Can hold
Jin-Yi Yu: High
Jin-Yi Yu: And for this temperature, we can find out from this equation.
Jin-Yi Yu: Right so anytime a new manager or humility. They is always a corresponding temperature
Jin-Yi Yu: Which tells us that the this among one of every episode right now we have saturate will become the maximum amount water vapor air can hope that means the
Jin-Yi Yu: Air we okay saturate ok so the key point is not under saturation. The coupon is not we can convert these waters water vapor information.
Jin-Yi Yu: Right. For example, here. Tell me come to use a temperature value to present this water vapor information. So this example is, tell me about is the maximum amount Huawei can t greasy.
Jin-Yi Yu: Can hope so we we can say now in in of it. You want to be the most tell me back in this water vapor among is equal
Jin-Yi Yu: Equivalent to the authentic we see in the mastermind. Man, what a what a rare, but it can hold an attendee greasy. So instead of, say, the water vapor minus 10 degrees. See that how many I just say the one among is equal to
Jin-Yi Yu: Do point
Jin-Yi Yu: Temperature of 10 degree, see what is the coupon, coupon means when a cave saturate your form.
Jin-Yi Yu: So if the amount, whatever. But we have to me by a by right now. It will begin to form to if obi temperature. Try to 10 degrees C. So we just say the amount of water vapor, we have right now.
Jin-Yi Yu: Is equal to the coupon temperature of can decrease it. So we can use this concept to represent
Jin-Yi Yu: So instead of showing the water vapor. The solution based on mini bar. I'm going to use their corresponding to point
Jin-Yi Yu: Temperature. So here 26 minutes is equal to two point temperature or suddenly one degree F. How to one or is I know it is by looking at
Jin-Yi Yu: This man this equation would put in our part of a per month. And then this equation tell us what is corresponding DuPont temperature
Jin-Yi Yu: Or you just go to this prop, find out what is a corresponding to temperature. Okay, now, so you can see that this left hand side to figure
Jin-Yi Yu: And right inside to figure all this red knight, the amount of whatever are identical. Exactly. But in the left hand side, everything that water vapor among this is
Jin-Yi Yu: Expressed immediate back in the right hand side is expressed in temperature as a two point conversion, then you say, if they're exactly the same.
Jin-Yi Yu: Pattern same information. Why meteorologist father to convert
Jin-Yi Yu: The water vapor, you only from many paths to temperature is in that cause confusion because temperate decreases the temperature unit by one expression express your
Jin-Yi Yu: Humility information in temperature here is the reason. Okay, so this is an example where I'm at. This one I'm at here. We know all these components is pressure 5000 a minute.
Jin-Yi Yu: And then this is. So based on this we suppress your value we know we have low pressure here high pressure. He had pressure here. Now we can see that every
Jin-Yi Yu: Coin is order station when especially I think I have another picture because rooming slide. So here you see
Jin-Yi Yu: So look at here.
Jin-Yi Yu: Everyone a station. He has a tool number on the left hand side of rush station. Okay, this installation location, the small circle station. Okay, so we see it always has to number
Jin-Yi Yu: One is an upper left on his lower. These are per lap is air temperature
Jin-Yi Yu: The real temperature in major in Irvine, and a lot of value is also a temperature value. For example, nice 166 but this one is not even not only
Jin-Yi Yu: Temperature, but this one is the to coin conversion. That means this is the temperature that local
Jin-Yi Yu: The Illuminati, one of our campaigns, based on the humidity information. So these 66 tell you the humility among this amount of humility will get come saturate in produce deal with temperature dropped to 6060
Jin-Yi Yu: Degree. If so, why is it so important to express humility in temperature because now you put temperature value and you really bad together side by side and this will tell you right now, a temperature in this location is 69 degrees.
Jin-Yi Yu: Fahrenheit, but the amount of water vapor in that same location will get concentrate or can saturate a 66 degree. See, it could add
Jin-Yi Yu: And the difference between 6966 is only three degree F. So that means in this particular location because the deal point, the man what America has a coupon temperature so close to the
Jin-Yi Yu: Observed temperature. So this location is going to have very high relative humidity. The is going to get saturation is going to produce whether any any we go to the other location. For example, here you can see
Jin-Yi Yu: Temperature is 64 and the water vapor man is equal to a temperature 42 the
Jin-Yi Yu: Temperature and the potential difference is very, very big is 22 degrees. So in this location we know rather a man. I want to be, but we have is very, very small. And so that's why
Jin-Yi Yu: In order to make that water vapor kiss saturate to produce when for crowd the temperature has to drop 22 degree from 64 to 42 so in this location, the relative humidity is very low, and is far away from producing weather. So this is the purpose that reason that meteorology Wankel put
Jin-Yi Yu: Humidity quantity in in DuPont temperature, so we can directly compare the difference between a air temperature, temperature to find out how soon or how far away the local weather is going to have room for precipitation can
Jin-Yi Yu: We say more data.
Jin-Yi Yu: And here is the way to measure the relative humidity. Okay. So in doing what. And so we want to find out the in this location, the humidity is so much is going to produce saturation soon or that
Jin-Yi Yu: In order to find out. We need to find a quantity call relative humidity.
Jin-Yi Yu: And why when we have relative humidity. We also have a CPC humidity. So here I'm going to explain the difference. Okay, so right. I think humility.
Jin-Yi Yu: Is based on actual or man. What about you have compared to the maximum amount of water vapor that air can home based on the physical law.
Jin-Yi Yu: And this ratio, this ratio of these two quantity is called relative humidity when receiving these high end users point of saturation. Okay. In a CPC humility is
Jin-Yi Yu: Is the real amount of water that you have in a location where the owner is going to get saturation is not this quantity, try to tell you
Jin-Yi Yu: These colleges total you have a lot of water vapor all you have. You don't have a lot of water vapor must cost CPC humanity and robbing me tell you how close you are, you're going to get richer to a saturation
Jin-Yi Yu: OK, so now here. I'm going to tell you how the meteorologist just manager. The narrative humidity. So basically again relative humidity again is
Jin-Yi Yu: Based on the actual water vapor must be by the by the saturation saturation Emma is
Jin-Yi Yu: Is the can be major is really the DuPont amateur
Jin-Yi Yu: Actually, and that's not a best way to say something equivalent product. Okay, now that's watching this video to listen to how meteorologist major the humility.
Jin-Yi Yu: I want
Jin-Yi Yu: To pause here real quick let's go back to to this one.
Jin-Yi Yu: Okay, so first thing when he used the, the tribe for to measure the same answer. So meter to measure temperature. This is our actual air temperature and this web bot some amateur measure the temperature this temperature is actually to point temperature because we put a wet cotton.
Jin-Yi Yu: Around this some some limiter. So, this the lease or keep on evaporator a proper a proper a proper a proper a proper to to the surrounding air until a point that this
Jin-Yi Yu: If we have a lot of water vapor already inside in the air, then this what this. These are the cousin doesn't need to
Jin-Yi Yu: Evaporate more water vapor. You only need to evolve a little bit because we're not have a lot of other way. But in our air. So this word for me to evaporate arena primo so when they
Jin-Yi Yu: Were cut. What we're cotton evaporate is going to take the heat out of his monitor. That's why the scimitar, you can see that his temperature to drop
Jin-Yi Yu: Below this air temperature to this point. Right. So if the surrounding area is very, very true. We have very, very small amount water vapor, then this
Jin-Yi Yu: What caused the needle evaporate are not are not allowed or water vapor from Cambodia water to become water vapor until to make reach saturation. So, this this temperature is going to Trump even more even more even more so, this difference between these
Jin-Yi Yu: air temperature a tripod temperature. Temperature tell you how much humidity, you have if this the temperature between tribal and what
Jin-Yi Yu: Temperature very big. The difference very big means our surrounding a must have very low amount of water vapor. That's why this weapon it evaporates, a lot of
Jin-Yi Yu: Water vapor water vapor and cool down this this a meter and that's why this debut starting telling you that by measuring the air temperature from the tripod where
Jin-Yi Yu: We can find out what's the right of the immunity and the way to find out that is I reading from the back of this list instrument is a table, that table tell you
Jin-Yi Yu: Depends on how much you the temperature difference between a triple report, then you can figure out the humility and that's based on can be based on the Classes copper equation we mentioned earlier. Okay, now let's finish the the this video.
Jin-Yi Yu: Okay. The reason I show you this video besides showing you just for fun to see how with the Rogers. May God rather humanity. The most important meaning.
Jin-Yi Yu: Is I wish you understand what's the reason we cannot use two point temperature to represent the water vapor, a man. OK. So now after we have one away for what are we have a carrier
Jin-Yi Yu: Up in the sky, and then they couldn't reach saturation and from cloud. And then we are going to have different type of crowd and height we have serious cow which is thing and we speak
Jin-Yi Yu: Car and usually they are very thing in high in the sky.
Jin-Yi Yu: And then we have Stratos cow, which is a layer COC America miles an hour. Very big. Her uncle's spread out of this.
Jin-Yi Yu: Cloud is causing stress car or new have cumulus cow which car has a very strong political environment that's called humanists crowd and nimbleness cow. Is it the counter has allowed a very breath okay container out of
Jin-Yi Yu: Run inside. You can tell by very practical. So that's one way we separate of this quite the cow based on their type each type is quite a particular property.
Jin-Yi Yu: Or we can we can describe a cow, based on the air. Hi, Mark. Hi cow middle
Jin-Yi Yu: High crowd middle crowd crowd and the height of cloud is determined by the height of his, his face of we look at the pace of crowd depends on where they're located. And we call high crowd crowd meet Oprah example he
Jin-Yi Yu: pays his between six to 15 kilometers call Heiko either cow base is below two kilometers call no crowd. Okay, so one way to have separate the square crop is the say this is a high carb, low carb keto crowd.
Jin-Yi Yu: Audio to describe Christ the square. This is a serious this
Jin-Yi Yu: Is a strategy Car Series cloud or Nimbus crap. Okay, and last crowd type is important when we do the waiter observation.
Jin-Yi Yu: And raised up is, we are not going to go through a very, very much in the rest of what is is when we talk about a severe way that we only only care about the crowd how crowd how high a cow is and
Jin-Yi Yu: And and then quitter. The car. What is a cow, cow one cow who craft, as we are issue but however these serious stress humorous numbers Crow Laws crowd type. We're going to mention it when we discussed the the
Jin-Yi Yu: The weather condition associated with the warm front end cold front. So this is a winter storm on we have on on Frank here in a call from here, then the cow before us.
Jin-Yi Yu: Again,
Jin-Yi Yu: So this is one from this is cold front and a cow type
Jin-Yi Yu: Before associate with
Jin-Yi Yu: Riches, so usually we was in front of this one from we are going to see
Jin-Yi Yu: Different type of cow and in front of these
Jin-Yi Yu: cold front usual we cover humans club, but in front of his own from Welcome to see serious cow.
Jin-Yi Yu: Cow and cumulus car in a particular order, or we'll talk about that when we come to the chapter. So he only want you to
Jin-Yi Yu: Realize, remember we have this to face with this quite a cow. And now I'm going to let you
Jin-Yi Yu: See how to recognize each type of cow right all most of these high car a serious cow or serious Nimbus cow or serious Transco for serious means that is very thing right we speak and humorous means is more like a popcorn.
Jin-Yi Yu: Kernel has somebody called structure has got popcorn. So one is popcorn cow is very brace Chris wispy and light in the high
Jin-Yi Yu: In the sky. That's called cirrus criminals club and when you see this car this thing called is stick together to become a pig layer. That's cause serious charges travel and all the series crowd high car. Okay.
Jin-Yi Yu: And then those are each picture of the car because study that. And then we have middle cow to type of middle class autos CHARLES CHARLES means we have very spread out very large horizontal extension extension of our cloud and this strategy.
Jin-Yi Yu: We observe very often in car outside coverage because outside California coast. We have allowed a Marine Strategy call you take an airplane ticket from Los Angeles Airport. And you can see, and then is your airplane is 100 miles of Mosca 10s of hundreds and we're knows
Jin-Yi Yu: And then the other kind of middle Christ the auto humanists, okay.
Jin-Yi Yu: In a low crowd. Most of the stress cloud automation outside also California sharks crab.
Jin-Yi Yu: locale and Australia's call can be strengths car or the impulse travels in very heavy rainfall Australia's cumulus is layers of crap and he has medical distribution.
Jin-Yi Yu: Of the amount of calls that your study all these three group of a crowd by yourself. So hopefully we'll be able to look at the sky, look at the sky look at
Jin-Yi Yu: The picture to tell people what kind of car, we are looking at, okay, and before I'm going to just show you a video that explains to you.
Jin-Yi Yu: All this type of crowd.
Jin-Yi Yu: Okay, so I'm going to stop here and for today. And then so next Tuesday. I can start a family where I'm at. I met him and what a man. So next week we are going to come to a more
Jin-Yi Yu: central part of these were the NSA, we need to know how to read the weather map. And I'm going to do that on Tuesday. And so today, I'm going to stop here.
Jin-Yi Yu: And also because there's there's not gonna be any homework this week, we'll start sending all the homework starting starting next week, so I'll stop here today and thank you and bye