1 Direct Retrieval and Cross-Comparison of Stratospheric Infrared Cooling Rate Profiles

• Main Authors: D. R. Feldman, K. N. Liou, Y. L. Yung, D. C. Tobin, A. Berk
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Arctic
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.589.1398; http://www.gps.caltech.edu/~drf/misc/dtobin/GRL_Paper_05_04_05.pdf

[1] We expand upon the methodology for retrieving thermal infrared cooling rate profiles, originally developed by Liou and Xue [1988], by using radiance data taken at different viewing zenith angles. Specifically, we explore the application of these methods to the retrieval of lower-and mid-stratospheric cooling rates using the ν2 band of carbon dioxide (CO2) using data from the AIRS instrument. We can measure the radiative forcing in the stratosphere due to CO2 with diminished retrieval error, but a more complete utilization of angular information is required. We have validated our calculations using in situ data taken by the Scanning High-Resolution Interferometer Sounder (S-HIS) on two aircraft campaigns: the Mixed-Phase Arctic Cloud Experiment (MPACE) and the Aura Validation Experiment (AVE) both in Fall, 2004. Given the results of the initial survey, we expect that remote sensing data may be able to vertical distribution of radiative forcing due to individual stratospheric constituents. 2