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Drought Characterization Using the Grace Terrestrial Water Storage Deficit in Turkey

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Abstract

Drought is a climatic event that has negative environmental effects. Detecting the drought in a region enables more effective water resources management in that region. This study was designed to carry out drought analysis for 98 months in the period of February 2010 and November 2020 in designated areas within the region determined in Turkey which is located in the temperate zone of the northern hemisphere. The analyzed data included terrestrial water storage anomaly (TWSA) values derived from Gravity Recovery and Climate Experiment (GRACE) and GRACE-FO (Follow On) satellites and monthly total precipitation values obtained from the PERSIANN system (Precipitation Estimation from Remotely Sensed Information using Artificial Neural Networks). Drought analysis was identified by utilizing the water storage deficit index (WSDI) and standardized precipitation index (SPI). The drought index values were compared with 5 different (The Arctic Oscillation (AO), The North Atlantic Oscillation (NAO), The Multivariate ENSO (El-Nino/Southern Oscillation) Index (MEI), The Oceanic Nino Index (ONI) and The Southern Oscillation Index (SOI)) atmospheric/oceanic climate indexes. The results of this study indicate that the years with the highest water deficit are 2014, 2018 and 2020. From 2010 to 2020, the equivalent water thickness (EWT) has decreased from + 1.5 to − 11.1 cm. Whereas wetness was observed throughout Turkey between the years 2010–2013, it was revealed that droughts occurred between the years 2014–2020. The findings of this study also showed that there was a significant correlation (at a significance level) among WSDI and AO, NAO and ONI indexes.

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This study was conceived by Topçu and all of the analysis and drafting of the manuscript was conducted by Topçu.

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Correspondence to Emre Topçu.

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Topçu, E. Drought Characterization Using the Grace Terrestrial Water Storage Deficit in Turkey. J Indian Soc Remote Sens (2024). https://doi.org/10.1007/s12524-024-01853-x

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  • DOI: https://doi.org/10.1007/s12524-024-01853-x

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