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Surface Boundary-Layer Characteristics Over a Tropical Inland Station: Seasonal Features

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Abstract

Some characteristic features of the atmospheric surfacelayer over an inland tropical station, Lucknow (27°N, 81°E)in India, are investigated for different seasons using micrometeorological data collected at the 10-m levelof an instrumented tower. Seasonal monsoonal variations in wind circulation (north-easterliesand south-westerlies) dominate the flow over this part of the region. This study utilizesthe wind, temperature and humidity data obtained for a period of one year from February 1996 to January 1997. The diurnal variation of mean parameterssuch as temperature, relative humidity, and wind speed are studied for different seasonsnamely pre-, south-west, post- and north-east monsoon periods. Turbulent statistics are computedusing the eddy correlation technique, and are studied under the framework of Monin–Obukhov similarity theory with results compared with otherexperimental studies reported in the literature. It is found that the turbulence statistics arenearly independent of season and the near-neutral values of the normalized standard deviations ofthe three wind components, temperature and specific humidityare found to be 1.00 ± 0.04 (vertical), 2.63 ± 0.36(longitudinal), 2.19 ± 0.06 (lateral), 6.56 ± 0.33and 6.45 ± 0.33 respectively.

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Authors and Affiliations

  1. Space Physics Laboratory, Vikram Sarabhai Space Centre, Thiruvananthapuram, 695 022, India

    Muvva Venkata Ramana, Praveena Krishnan & P. K. Kunhikrishnan

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  1. Muvva Venkata Ramana
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  2. Praveena Krishnan
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  3. P. K. Kunhikrishnan
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Venkata Ramana, M., Krishnan, P. & Kunhikrishnan, P.K. Surface Boundary-Layer Characteristics Over a Tropical Inland Station: Seasonal Features. Boundary-Layer Meteorology 111, 153–157 (2004). https://doi.org/10.1023/B:BOUN.0000010999.25921.1a

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