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The Study of Atmospheric Stability Using Radio Refractivity Profiles Over a Tropical Climate in Nigeria

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Abstract

The variations of meteorological parameters have significant effects on radio wave signals propagating through the troposphere. Proper planning of radio communication links can be achieved by continuous studying of the atmosphere using refractivity profiles to provide baseline data that could be used to mitigate satellite communication outage before the onset of severe adverse hydrometeor environment. The stability of the atmosphere based on ten (10) years (2009–2018) reanalysis data of atmospheric parameters (temperature, atmospheric pressure, and relative humidity) obtained from the European Center for Medium-range Weather Forecast (ECMWF) at 1000 hPa, 975 hPa, 950 hPa, 925 hPa, 900 hPa, 800 hPa, 700 hPa, 500 hPa, 400 hPa, 300 hPa, 200 hPa, and 100 hPa to estimate the Atmospheric Stability Indices (ASI) and the Refractivity of the Lifted Index (LIR) has been analysed. The trend in the variation LIR and Lifted Index (LI) shows that when LI is negative, LIR is more negative, which implies that the atmosphere is more unstable. Results also show that positive LI indicates negative LIR, which implies that the atmosphere is more stable. However, some cases occurred when a significant amount of water vapour accumulates at 500 hPa pressure level; in such case, positive LI indicates negative LIR which implies that the atmosphere is not stable. The results will serve as a database to checkmate the occurrence of severe weather conditions in the study area

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Authors and Affiliations

  1. Department of Physics, The Federal University of Technology, Akure, P.M.B 704, Akure, Nigeria

    S. E. Falodun, J. S. Ojo & A. I. Kareem

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  1. S. E. Falodun
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  2. J. S. Ojo
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  3. A. I. Kareem
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Correspondence to J. S. Ojo.

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Falodun, S.E., Ojo, J.S. & Kareem, A.I. The Study of Atmospheric Stability Using Radio Refractivity Profiles Over a Tropical Climate in Nigeria. MAPAN 36, 751–762 (2021). https://doi.org/10.1007/s12647-020-00419-9

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  • DOI: https://doi.org/10.1007/s12647-020-00419-9

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