Tropospheric CO in the Arctic region measured from space by AIRS and MOPITT in the last decade

We present in this poster the tropospheric Carbon Monoxide (CO) measurements in the Arctic region in the last 10 years by satellite instruments particularly the Atmospheric Infrared Sounder (AIRS) and the Measurement of Pollution in the Troposphere (MOPITT). Time series of the CO distributions and transport will be summarized in comparison with in situ ground measurements. Validations of these products are carried out using NASA's ARCTAS field mission that was conducted over the Arctic and surrounding areas. We will show results from a new alternative retrieval algorithm for AIRS CO products using the Optimal Estimation (OE) technique, which is different from the AIRS operational algorithm. The primary advantage of using this algorithm is to analyze AIRS CO, as well as the other retrieval properties such as the Averaging Kernels (AKs), the Degrees of Freedom for Signal (DOFS), and the error covariance matrices, jointly with other sensors, such as MOPITT, that use similar methodology, to achieve longer measurement time series.