Lower Tropospheric CO2 from OCO-2

Thursday, 18 December 2014
Susan Sund Kulawik1, Christopher O'Dell2, Feng Deng3, Dylan B. A. Jones4, Robert R Nelson5 and Vivienne Payne1, (1)NASA Jet Propulsion Laboratory, Pasadena, CA, United States, (2)Colorado State University, Atmospheric Sciences, Fort Collins, CO, United States, (3)University of Toronto, Physics, Toronto, ON, Canada, (4)University of Toronto, Toronto, ON, Canada, (5)Colorado State University, Fort Collins, CO, United States
We have developed a CO2 product from OCO-2 which is more dominantly sensitive to the surface than the standard XCO2 product using a combination of retrieval updates and retrieval post-processing. We show the results of this product using simulated OCO-2 results, GOSAT results, and OCO-2 results. The benefits of the lower-tropospheric product are demonstrated using an OSSE which show that the addition of this product to OCO-2 column values should allow flux estimates at finer scales than XCO2 alone. Constraint of the column simultaneously with the lower troposphere is expected to minimize transport error, as has been found in multi-model studies.