Physics
Scientific paper
May 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30i..29y&link_type=abstract
Geophysical Research Letters, Volume 30, Issue 9, pp. 29-1, CiteID 1476, DOI 10.1029/2002GL016685
Physics
13
Meteorology And Atmospheric Dynamics: Remote Sensing, Meteorology And Atmospheric Dynamics: Stratosphere/Troposphere Interactions, Meteorology And Atmospheric Dynamics: Tropical Meteorology, Meteorology And Atmospheric Dynamics: Turbulence
Scientific paper
In November 2001, the Equatorial Atmosphere Radar (0.20°S, 100.32°E) observed a continuous strong eastward wind shear (10-50 m s-1 km-1), westward wind (2-27 m s-1), and the radar echo layer tilted downward to the west in the region 0-1 km above the tropopause. During the same period, the Richardson number calculated with hourly-averaged horizontal wind and radiosonde temperature data was almost continuously <0.5 and sometimes <0.25, which seems to indicate that the Kelvin-Helmholtz instability (KHI) frequently occurs in that region. The existence of the tilted radar echo layer can be explained by KHI billows. A spurious updraft caused by the KHI-induced tilted echo layer and by the strong westward wind was also observed in the region.
Fujiwara Masatomo
Fukao Shoichiro
Hashiguchi Hiroyuki
Horinouchi Takeshi
Yamamoto Masayuki K.
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