Bulletin des sciences géographiques de l'INCT
Volume 27, Numéro 1, Pages 42-47
2023-03-19
Atmospheric Water Vapor Measurement In Order To Estimate Continental Precipitation Over Algeria Region Based On The Inct-gnss Network
Authors : Abdellaoui Hassen . Hammou Ali Omar . Makhlouf Soraya . Zaourar Naima . Meslem Mohamed Aïssa .
Abstract
Abstract— Northern Algeria region is characterized a Mediterranean climate, cold, humid, dry winters and warm summers, same as other countries in the world, and is exposed to desertification problems. Along its coast, the average annual precipitation is 384 mm, so more than 75% of its territory has an annual precipitation lower than 384 mm. This is a global problem that affects a large number of people and land, and is now one of the most important environmental problems in Algeria. The work presented in this paper describe a preliminary study of GNSS meteorology technique based on GNSS positioning and estimation of the tropospheric water vapor quantity based exclusively on the INCT-GNSS network. According to our results, we noted that the integrated content of water vapor is a highly variable parameter that depends on the study region, in our study it is between the South and the North of Algeria, this variation is related to the geographical position in relation to the Mediterranean Sea, as well as the season, noticing that during the winter the quantities of water vapor are low compared to the summer. No relationship could be found between GNSS IWV and precipitation values, except for a significant increase in GNSS IWV that frequently precedes the arrival of precipitation. Improving atmospheric observation techniques and understanding of the key processes of precipitation formation is thus a major challenge for our society. In fact, a better prediction of precipitation would allow bettering anticipating the occurrence of floods and consequently to minimize the damages related to these events.
Keywords
GNSS data post-processing ; Water vapor ; Algeria region ; IWV ; ZTD ; INCT GNSS network
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