SBUV Trends in PMC Ice Water Content

Details SBUV Trends in PMC Ice Water Content SBUV Trends in PMC Ice Water Content

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa21a1762d&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SA21A-1762

Physics

[0340] Atmospheric Composition And Structure / Middle Atmosphere: Composition And Chemistry, [1610] Global Change / Atmosphere, [3360] Atmospheric Processes / Remote Sensing

Scientific paper

Overlapping data sets from SBUV and SBUV/2 instruments can be combined to create a long-term record of polar mesospheric cloud (PMC, also known as noctilucent clouds) behavior. We have previously used these data to examine multi-decade trends in PMC occurrence frequency and albedo. In this presentation, we extend our analysis to consider zonally and seasonally averaged PMC ice water content (IWC). We use a set of parameterized relationships between mid-UV PMC albedo and scattering angle derived from WACCM-CARMA simulations to determine IWC from SBUV PMC observations at 252 nm. This procedure incorporates an adjustment for the fact that the SBUV/2 data are sensitive to only a portion of the total IWC. We will show results using SBUV/2 data from 1979 to the most recent Northern Hemisphere PMC season in 2010, and compare our results with previous work (e.g. Stevens et al. [2007], Baumgarten et al. [2008]).

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