Bias Correction of Daily Precipitation on Two Eastern Mediterranean Stations with GAMs

Climate models are fundamental tools for assessing historical climate conditions and projecting future ones. However, the results often differ systematically from observational data. The minimization of these differences is known as bias correction. The present study aims to correct the biases betwe...

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Published in:Environmental Sciences Proceedings 2023-08, Vol.26 (1), p.17
Main Authors: Georgia Lazoglou, Theo Economou, Christina Anagnostopoulou, Anna Tzyrkalli, George Zittis, Jos Lelieveld
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Language:English
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bias correction
daily precipitation
eastern Mediterranean
generalized additive models (GAMs)
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Theo Economou
Christina Anagnostopoulou
Anna Tzyrkalli
George Zittis
Jos Lelieveld
description Climate models are fundamental tools for assessing historical climate conditions and projecting future ones. However, the results often differ systematically from observational data. The minimization of these differences is known as bias correction. The present study aims to correct the biases between observed daily precipitation values and the respective simulated ones from a EURO-CORDEX climate model. For this purpose, powerful statistical tools—generalized additive models (GAMs)—are used. GAMs are modified to adjust the simulated rainfall with the highest accuracy, and subsequently, they are evaluated by comparison with observational data. The method was applied to two eastern Mediterranean stations (Larissa in Greece and Larnaca in Cyprus) for the period 1981 to 2005. The results from both stations reveal that GAMs offer a valuable and accurate technique for the bias adjustment of daily precipitation.
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subjects bias correction
daily precipitation
eastern Mediterranean
generalized additive models (GAMs)
title Bias Correction of Daily Precipitation on Two Eastern Mediterranean Stations with GAMs
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