Physics
Scientific paper
Jun 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27.1691p&link_type=abstract
Geophysical Research Letters, Volume 27, Issue 12, p. 1691-1694
Physics
8
Atmospheric Composition And Structure: Middle Atmosphere-Composition And Chemistry, Atmospheric Composition And Structure: Middle Atmosphere-Constituent Transport And Chemistry, Meteorology And Atmospheric Dynamics: Middle Atmosphere Dynamics, Meteorology And Atmospheric Dynamics: Stratosphere/Troposphere Interactions
Scientific paper
We present zonal mean time series of water vapor in the lower stratosphere as measured by UARS MLS. The data are taken from a development version known as V104; we demonstrate that this version behaves in a physically realistic manner at 100 and 68 hPa, lower altitudes than are useful in previous versions of the data. The 100 hPa data show that the annual cycle in tropical lower stratosphere water vapor is driven by the northern hemisphere. Both low and high mixing ratios spread from the northern hemisphere tropics into the southern hemisphere tropics and into the mid-latitudes with transport out of the tropics being greater at 100 hPa than at 68 hPa. Transport into midlatitudes is greater in the northern hemisphere and greater in spring than in fall. At 46 hPa, the tropical annual cycle is strongly confined to low latitudes.
Clark Hannah L.
Harwood Robert S.
Pumphrey Hugh C.
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