Department Seminar

The impact of emissions of isoprene in a chemistry climate model

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.

Event Information
Event date and time: 
Wednesday, December 18, 2013 - 2:00pm - 3:00pm
Location: 
Croul Hall 3101
Speaker Information
Name: 
Alex Archibald
Affiliation: 
Centre for Atmospheric Science at Cambridge University
ESS Information
Holmes, Chris

Scenarios of 21st-century human access in a warming Arctic

Reduced Arctic sea ice continues to be a palpable signal of global change. Record lows in September sea ice extent from 2007-2013 have fueled speculation that trans-Arctic shipping routes may become physically viable in the 21st century. These physical changes combined with increased resource demand in East Asia have recast the Arctic as an international trade space facilitating export of resources and offering potential alternative pathways for global maritime trade.

Event Information
Event date and time: 
Wednesday, May 14, 2014 - 2:00pm - 3:00pm
Location: 
CH 3101
Speaker Information
Name: 
Scott Stephenson
Affiliation: 
UCLA
ESS Information
Davis, Steven

Ecoclimate Teleconnections: remote effects of the interactions between ecosystems and climate

In this talk I will show that large-scale afforestation in the northern mid latitudes warms the Northern Hemisphere and alters global circulation patterns in climate model experiments. An expansion of dark forests increases the absorption of solar energy and increases surface temperature, particularly in regions where the land surface is unable to compensate with latent heat flux due to water limitation.

Event Information
Event date and time: 
Wednesday, May 28, 2014 - 2:00pm - 3:00pm
Location: 
CH 3101
Speaker Information
Name: 
Abigail L. S. Swann
Title: 
Assistant Professor
Affiliation: 
Department of Atmospheric Sciences and Department of Biology, University of Washington
ESS Information
Randerson, Jim

Insight to past and future ENSO from Plio-Pleistocene nutrient dynamics

Models disagree about the average state of the tropical Pacific when subjected to enhanced greenhouse gas forcing and this uncertainty emphasizes the importance of reconstructing past variability in tropical Pacific climate, through episodes of known radiative forcing. Measurements of the modern and ice age tropical Pacific allow us to reconstruct the zonal gradient in nutrients over the past 4 million years—a gradient principally responding to upper ocean dynamics.

Event Information
Event date and time: 
Wednesday, March 19, 2014 - 2:00pm - 3:00pm
Location: 
Croul Hall 3101
Speaker Information
Name: 
Patrick A. Rafter
Title: 
Assistant Project Scientist
Affiliation: 
Department of Earth System Science, UC Irvine
ESS Information
Southon, John
Druffel, Ellen

Seminar Series: Urban flux measurements by eddy covariance

Urban flux measurements by eddy covariance
 
Erik Velasco
Singapore-MIT Alliance for Research and Technology
 
Event Information
Event date and time: 
Friday, June 13, 2014 - 2:00pm - 3:00pm
Location: 
Croul Hall 3101
Speaker Information
Name: 
Dr. Erik Velasco
Title: 
Research Scientist
Affiliation: 
Center for Environmental Sensing and Modeling, Singapore-MIT Alliance for Research and Technology
ESS Information
Hopkins, Francesca

Tropical forcing of the recent rapid Arctic warming in northeastern Canada and Greenland

Rapid Arctic warming and sea ice reduction in the Arctic Ocean are widely attributed to anthropogenic climate change. The Arctic warming exceeds the global average warming due to feedbacks that include sea ice reduction and other dynamical and radiative feedbacks. We show that the most prominent annual mean surface and tropospheric warming in the Arctic since 1979 has occurred in northeastern Canada and Greenland.

Event Information
Event date and time: 
Wednesday, February 19, 2014 - 2:00pm - 3:00pm
Location: 
3101 Croul Hall
Speaker Information
Name: 
Dr. Qinghua Ding
Title: 
Department of Atmospheric Sciences
Affiliation: 
University of Washington
ESS Information
Yu, Jin-Yi

Dissertation Defense: Karli J. Ouellette

Hydrologic applications of GPS site-position observations in the Western U.S.
Event Information
Event date and time: 
Monday, November 25, 2013 - 1:00pm - 2:00pm
Location: 
Croul Hall 3101
Speaker Information
Name: 
Karli J. Ouellette
Title: 
Ph.D. Candidate
Affiliation: 
Department of Earth System Science, UC Irvine
ESS Information
Famiglietti, James

Dissertation Defense: Kathe Todd-Brown

Soil carbon dynamics: global model evaluation, predictions, and new mechanisms

Event Information
Event date and time: 
Tuesday, November 26, 2013 - 1:00pm - 2:00pm
Location: 
Croul Hall 3101
Speaker Information
Name: 
Kathe Todd-Brown
Title: 
Ph.D. Candidate
Affiliation: 
Department of Earth System Science, UC Irvine
ESS Information
Allison, Steve

Ecosystems as anthropological objects of study: an example and a discussion

In the 20th century, anthropologists joined natural and physical scientists in using the term “system” to describe spatial arrangements of material, organisms, and their modes of interaction.  Since mid-century, this analytic term has become a “native” term in modernized societies. People now recognize themselves as belonging to various kinds of systems: political, economic, sociocultural, industrial, and energy.

Event Information
Event date and time: 
Wednesday, February 26, 2014 - 2:00pm - 3:00pm
Location: 
Croul Hall 3101
Speaker Information
Name: 
Valerie Olson, Ph.D.
Affiliation: 
Department of Anthropology at the University of California, Irvine
ESS Information
Magnusdottir, Gudrun

Biogenic Organics Coupling of the Land Ecosystem-Atmosphere-Climate System: From Concept to Quantitative Model

Secondary organic aerosol (SOA) and ozone are important contributors to the radiative forcing that drives climate change. These two atmospheric constituents are formed in the atmosphere from chemical reactions involving volatile organic compounds (VOC) emitted primarily from terrestrial ecosystems. Both ozone and SOA can directly influence solar radiation and thus change light and temperature at the Earth’s surface.

Event Information
Event date and time: 
Wednesday, January 15, 2014 - 2:00pm - 3:00pm
Location: 
Croul Hall 3101
Speaker Information
Name: 
Dr. Alex Guenther
Affiliation: 
Pacific Northwest National Laboratory
ESS Information
Kim, Saewung
Earth System Science @ UC Irvine