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Modelling Precipitable Water Vapour (PWV) Over Nigeria from Ground-Based GNSS

*Bawa Swafiyudeen  -  Ahmadu Bello University, Zaria, Nigeria, Nigeria
Usman Ibrahim sa'i  -  Ahmadu Bello University, Zaria, Nigeria, Nigeria
Bala Adamu  -  Ahmadu Bello University, Zaria, Nigeria, Nigeria
Abubakar Aliyu Zailani  -  Ahmadu Bello University, Zaria, Nigeria Department of geomatics (Lecturer 11), Nigeria
Adamu Abubakar Musa  -  Department of Surveying and Geoinformatics, Nuhu Bammalli Poly, Zaria, Kaduna, Nigeria, Nigeria
Shehu Nura  -  Department of Surveying and Geoinformatics, Nuhu Bammalli Poly, Zaria, Kaduna, Nigeria, Nigeria

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Abstract

This paper presents the spatiotemporal variability of Precipitable Water Vapour (PWV) retrieved from ground–based Global Navigation Satellite System (GNSS) stations over Nigeria for the years 2012 to 2013. In this paper, the GNSS data were processed using GAMIT (ver. 10.70). The GNSS PWV were grouped into daily and monthly averages; the variability of the daily and monthly GNSS PWV were compared and validated with the daily and monthly PWV from National Centre for Environmental Prediction (NCEP) and monthly Rainfall data for the study years respectively. The results revealed that the spatiotemporal variability of PWV across Nigeria is a function of geographic location and seasons. The result shows that there is temporal correlation between GNSS PWV, NCEP PWV and rainfall events. The research also affirms that GNSS PWV could be used to improve weather forecasting/monitoring as well as climate monitoring.

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Keywords: NCEP, GNSS, Water Vapour, NigNet, Rainfall

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Language : EN
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