School of Physical and Chemical Sciences Seminar Series

Modelling the interactions between atmospheric chemistry and climate

Speaker

Laura Revell

Institute

Bodeker Scientific

Time & Place

Fri, 18 Aug 2017 11:00:00 NZST in Rutherford Room 351

All are welcome

Abstract

Chemistry-climate models, which consist of a general circulation model coupled to an atmospheric chemistry scheme, can be used to project how the atmosphere will evolve through the 21st century under different climate change scenarios, and to disentangle natural and anthropogenic drivers of change in atmospheric composition and circulation. This talk will discuss the impacts of anthropogenic greenhouse gases on the stratospheric ozone layer, especially the role of nitrous oxide (N2O) in ozone destruction, and why the use of the Ozone Depletion Potential metric for N2O is of limited use in a changing climate. The impacts of volcanic eruptions on stratospheric temperatures and ozone concentrations will be discussed, along with the problems involved in compiling stratospheric aerosol data sets to drive chemistry-climate models following a major volcanic eruption when the stratosphere is too optically opaque for satellite instruments to measure. Finally, the role of tropospheric ozone as an air pollutant and greenhouse gas will be discussed, along with simple machine learning strategies to address biases in simulated tropospheric ozone concentrations in chemistry-climate models.

Biography

Laura obtained her PhD in Chemistry from UC in 2012.  She currently works for Bodeker Scientific and is currently visiting with Physics' Environmental Sciences group, located in the new School of Physical and Chemical Sciences 

http://www.bodekerscientific.com/people/laura-revell