*** Alumnus Seminar ***
September 10, 2015

High-resolution emission and transport modeling of atmospheric CO2

Lesley Ott

Anthropogenic carbon dioxide (CO2) emissions are the primary driver of climate change. On a global scale, emissions estimates are considered robust, but significant uncertainties exist at local and regional scales. Improved understanding of the spatial distribution of anthropogenic CO2 emissions is necessary for understanding the land sink of CO2 through inversion modeling studies. We will present results from the ODIAC (Open-source Data Inventory for Anthropogenic CO2), a global high-resolution emission dataset for fossil fuel CO2 emissions, and compare with other emissions inventories. We will also discuss the difficulty of direct monitoring of fossil fuel emissions from satellites.

In the second part of our presentation, we will present results from NASA's Goddard Earth Observing System Model, Version 5 (GEOS-5) Nature Run. Produced at 7-km, the Nature Run provides an unprecedented view of global CO and CO2 at ~1000 times greater resolution than most global CO2 models are capable of. We will focus on evaluation of carbon species in the Nature Run and present examples of how this dataset may be used to inform satellite retrievals, future measurement techniques, and understanding of transport of pollution from urban areas. We will also discuss future directions of high-resolution Earth system modeling.