Other
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsa43a1559t&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SA43A-1559
Other
0300 Atmospheric Composition And Structure, 0305 Aerosols And Particles (0345, 4801, 4906), 0340 Middle Atmosphere: Composition And Chemistry, 0350 Pressure, Density, And Temperature, 0394 Instruments And Techniques
Scientific paper
The Aeronomy of Ice in the Mesosphere (AIM) satellite mission has observed three polar mesospheric cloud (PMC) seasons at this point in time including two in the northern hemisphere (2007 and 2008) and one in the south (2007/2008). The Cloud Imaging and Particle Size (CIPS) and Solar Occultation for Ice (SOFIE) instruments observe PMC from a noon-midnight sun-synchronous orbit. CIPS and SOFIE measure the UV scattering and IR extinction of PMC, respectively. The two experiments provide separate measurements of the integrated (vertical column) ice water content, independent of knowledge of the particle size distribution. We present results for the total ice content of the 2007 summertime polar mesosphere, and compare with predictions from two models that simulate PMC within version 3 of the Whole Atmosphere Community Climate Model (WACCM-3). The models differ in that one includes a sectional microphysics representation of the PMC size distribution, using the Community Aerosol and Radiation Model for Atmospheres (CARMA), while the other uses a bulk microphysics representation. Seasonal and latitudinal cross-sections show good overall agreement with both models, indicating a significant advance in understanding the complicated interactions of ice microphysics, chemistry and dynamics in the summer polar mesosphere.
Bailey Scott M.
Bardeen Charles
Gordley Larry L.,
Hervig Mark
Marsh Daniel R.
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