Satellite observation of dehydration in the Arctic Polar stratosphere

Details Satellite observation of dehydration in the Arctic Polar stratosphere Satellite observation of dehydration in the Arctic Polar stratosphere

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29h..25p&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 8, pp. 25-1, CiteID 1184, DOI 10.1029/2001GL014147

Physics

3

Atmospheric Composition And Structure: Middle Atmosphere-Composition And Chemistry, Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801), Meteorology And Atmospheric Dynamics: Polar Meteorology

Scientific paper

We report the first space-borne observation of dehydration in the Arctic polar stratosphere. In January 1997, the Improved Limb Atmospheric Spectrometer (ILAS) observed up to ~3 ppmv water vapor reduction during ice cloud formation and ~2 ppmv permanent removal of water vapor, mostly at altitudes between 23 and 26 km. In some cases, the dehydrated air was downwind from mountain wave induced Polar Stratospheric Cloud (PSC) events. Furthermore, simultaneous observations of HNO3 and H2O show that the gas phase reduction of HNO3 in the Arctic (January 1997) was much smaller than that observed in the Antarctic (June 1997) when a similar level of water vapor reduction occurred.

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