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.
Seminar Series: Tracing terrestrial biosphere-atmosphere exchange of CO2 and H2O using stable isotopes
Tracing terrestrial biosphere-atmosphere exchange of CO2 and H2O using stable isotopes
Dr. Lisa R. Welp
Scripps Institution of Oceanography, UC San Diego
Shear Generated Turbulence in the Natural Environment
Dr. Kelvin Richards
Professor of Oceanography, University of Hawaii
Seminar Series: Carbon Flux Dynamics in the Gulf of Maine and POC Budget for the Northeast Atlantic Margin
Carbon Flux Dynamics in the Gulf of Maine and POC Budget for the Northeast Atlantic Margin
Dr. Cindy Pilskaln
Professor of Oceanography, Univ. Massachusetts Dartmouth, School for Marine Science
Joint Seminar with the Statistics and ESS Departments: Changes in Means and Extremes of Surface Temperatures, from Centennial to Daily Timescales
Characterizing how the magnitude and frequency of extreme climate events are changing, and will continue to change due to anthropogenic forcing of the climate system, is currently a major challenge for the climate sciences. While the current warming trend is certainly contributing to the recent increase in warm temperature extremes and decrease in cold extremes, far less is understood about the contribution of possible changes in the variability about the central tendency. These issues are explored on two distinct time scales.
Seminar: Contrasting influences of recent aerosol changes on clouds and precipitation in Europe and East Asia
Over the last few decades, aerosol loadings have increased substantially over East Asia, while Europe has experienced huge reductions. We explore the following two questions: (1) What influence have these aerosol changes had on clouds and precipitation? (2) To what extent are current global models able to reproduce these changes? To address these questions we combine ground-based observations with simulations using an Earth System Model with parameterized aerosol-radiation and aerosol-cloud interactions (NorESM).