Mar 24, 2015 9:32 GMT
Multidisciplinary effort aims to engage public in local marine and coastal issues
Mar 13, 2015 9:08 GMT
Coupled chemistry-climate models are being increasingly used to tackle the problem of understanding the mechanisms for driving changes in past, present and future atmospheric composition. Given the computational overheads of running these types of models the chemical mechanisms which are used are often chosen for their speed of simulation.
The Madden-Julian Oscillation (MJO) exerts tremendous influences on global climate and weather systems, but our current general circulation models (GCMs) exhibit rather limited capability in representing this prominent tropical variability mode. Also, the fundamental physics of the MJO are still elusive.
China's economic growth is expected to continue into the next decades, accompanied by a sustained urbanization and industrialization. The associated increase in demand for land, water resources, and rich foods will deepen the challenge to sustainably feed the population and to balance agricultural and environmental policies.
Although inland waters comprise a small fraction of Earth’s surface, they play a critical role in the global C cycle. Global estimates of riverine flux of dissolved organic carbon (DOC) to the oceans range from about 250 to 360 Tg y-1. Interestingly, only a small fraction of the roughly 2900 Tg C yr-1 transported through inland waters globally ever reaches the ocean.
Seminar: The plant-soil system in a changing world - selected research highlights from work on vegetation fire, chronic nitrogen deposition, afforestation, and summer drought on soil organic matter
The presentation will highlight results on projects on vegetation fire, chronic nitrogen deposition, afforestation, and summer drought in Switzerland. Additionally present and future work in the new Univ. Zurich Research Priority Program on Global Change and Biodiversity with work in the Siberian tundra, temperate beech forest, and Borneo rain forest will be presented.
Seminar: Large Increasing Trend of Tropical Cyclone Rainfall in Taiwan and the Roles of Terrain and Southwest Monsoon
Taiwan, which is situated in one of the main paths of western North Pacific tropical cyclones (TCs), has experienced a dramatic increase in typhoon-related rainfall, with nine of the top 12 typhoons in total rainfall since hourly rainfall observations started in 1960 have occurred in the 21st century. This record breaking increase has led to suggestions that they are the manifestation of the effects of global climate change include global warming. Typhoon rainfall intensity is analyzed with respect to typhoon tracks that are in different regimes relative to the meso-α scale terrain.
Satellite observations offer a powerful source of data to support air quality management, by providing information about air pollutant concentrations, trends, and transport, particularly where no other monitors are available; identification of pollution sources to constrain emissions estimates; and regional characterization of air pollutant distributions to support air monitor siting decisions.
Seminar: Reducing uncertainty in regional climate projection: New challenge for coupled ocean-atmosphere dynamics
Global mean temperature has risen for the past century and is projected to rise even more in response to the increasing atmospheric CO2 concentrations. Precipitation change is of vital importance to societies but precipitation projections are intrinsically challenging as they change sign from one region to another. Recent studies show that in the tropics, radiatively forced changes in precipitation and atmospheric circulation are tightly coupled to spatial patterns of ocean surface warming.