Observations of mid-troposhheric circulation from water vapour radiances of polar orbiting satellites |
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| Authors: | M S Narayanan P K Pal P C Joshi M Mali Baby Simon |
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| Institution: | 1. Meteorology and Oceanography Division, Space Applications Centre, 380 053, Ahmedabad, India
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| Abstract: | Water vapour tracers can provide useful information on winds at ≈ 500mb by observing the 6·7μ radiances. This fills the data
gap in the cloud motion winds provided by conventional meteorological geostationary satellites. There is no geostationary
satellite at present over the Indian Ocean with 6·7μ imaging capability to provide mid-tropospheric winds. The potentials
of 6·7μ radiances, available from polar orbiting satellites, for mid-tropospheric circulation features have been examined
in this study. Tiros-N satellite data of May 1979 and ECMWF level-IIIb wind data were analysed to relate the radiances with
the streamlines. We find that the radiances of 6·7μ from orbiting satellites agree well with the wind field. |
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| Keywords: | Polar orbiting satellite mid-tropospheric streamilines water vapour radiances |
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