Advances in $\hbox{CO}_{2}$ Observations From AIRS and ACOS

NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) archives and distributes pioneering collections of data on atmospheric greenhouse gases. In September of 2012, the Atmospheric Infrared Sounder (AIRS) marked a decade of tropospheric observations of carbon dioxide (CO
₂
). Most recently, the Atmospheric CO
₂
Observations from Space (ACOS) project and GES DISC released CO
₂
retrievals derived from radiances observed by the Japanese Greenhouse gases Observing SATellite (GOSAT) satellite, launched in 2009. In this letter, we present the most recent estimates of decadal mid-tropospheric trends of CO
₂
from AIRS, as well as the most recent status of the total column-average distribution of CO
₂
from ACOS. We also demonstrate that significant discrepancies still exist in the global distribution of observed and modeled column amounts of CO
₂
using the CO
₂
retrievals from the ACOS project.