Atmospheric phenomena deduced from radiosonde and GPS occultation measurements for various application related studies |
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| Authors: | C J Johny S K Sarkar D Punyasesudu |
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| Institution: | (1) Radio & Atmospheric Sciences Division, National Physical Laboratory, Dr. K S Krishnan Marg, New Delhi, 110 012, India;(2) Department of Physics, Post Graduate Study Centre, Sri Krishnadevaraya University, Kurnool, 518 002, A.P., India |
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| Abstract: | The tropopause height and tropopause temperature are sensitive to temperature changes in troposphere and stratosphere. These
are the measures of global climatic variability. Atmospheric profiles of temperature, refractivity and water vapour are always
needed for communication, navigation and atmospheric modeling studies. The tropopause characteristics over the Indian region
have been studied using radio occultation measurements (CHAMP) on the basis of cold point criterion. Tropopause height shows
large variation in the latitude range ∼30°–40°N during winter. Tropopause temperature less than −82°C, assumed to facilitate
troposphere to stratosphere air transport, is observed at a number of tropical Indian locations and no seasonal pattern is
observed in its occurrence. The bias in temperature and refractivity deduced from radiosonde and radio occultation measurements
is also presented. |
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| Keywords: | Cold point tropopause cold tropopause tropospheric stratospheric exchange radio occultation subtropics atmospheric sciences climate upper atmosphere |
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