HR: 16:00h
AN: A52G-01    [PDF]
TI: Changes in stratospheric water vapor derived from HALOE, 1991-2003
AU: * Randel, W J
EM: randel@ucar.edu
AF: National Center for Atmospheric Research, 1850 Table Mesa Drive, Boulder, CO 80307 United States
AU: Wu, F
EM: wuf@ucar.edu
AF: National Center for Atmospheric Research, 1850 Table Mesa Drive, Boulder, CO 80307 United States
AU: Oltmans, S J
EM: soltmans@cmdl.noaa.gov
AF: National Oceanic and Atmospheric Administration, 1850 Broadway, Boulder, CO 80305 United States
AB: Interannual changes in stratospheric water vapor are examined using Halogen Occultation Experiment (HALOE) satellite measurements over 1991-2003. Anomalies in water vapor with an approximate 2-year periodicity originate near the tropical tropopause, and propagate vertically and latitudinally with the mean stratospheric transport circulation (in an analogous manner to the seasonal tape recorder). Unusually low water vapor anomalies are observed in the lower stratosphere for 2001-2002. The water vapor changes in HALOE data are well correlated with temperature anomalies near the tropical tropopause. Comparisons of the HALOE data with balloon measurements of lower stratospheric water vapor at Boulder, Colorado (40N) show some agreement for interannual changes during 1992-2002, but decadal increases observed in the balloon measurements for this period are not observed in HALOE data.
UR: http://acd.ucar.edu/~randel/H2O_changes.html
DE: 3362 Stratosphere/troposphere interactions
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting