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A quantile mapping method to fill in discontinued daily precipitation time series

Gryllakis Emmanouil, Polykretis Christos, Manoudakis Stylianos, Seiradakis Konstantinos, Alexakis Dimitrios

Πλήρης Εγγραφή


URI: http://purl.tuc.gr/dl/dias/A236A847-3D24-4145-AF49-CE2DAA74DD94
Έτος 2020
Τύπος Δημοσίευση σε Περιοδικό με Κριτές
Άδεια Χρήσης
Λεπτομέρειες
Βιβλιογραφική Αναφορά M. G. Grillakis, C. Polykretis, S. Manoudakis, K. D. Seiradakis, and D. D. Alexakis, “A quantile mapping method to fill in discontinued daily precipitation time series,” Water, vol. 12, no. 8, Aug. 2020. doi: 10.3390/w12082304 https://doi.org/10.3390/w12082304
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Περίληψη

We present and assess a method to estimate missing values in daily precipitation time series for the Mediterranean island of Crete. The method involves a quantile mapping methodology originally developed for the bias correction of climate models’ output. The overall methodology is based on a two-step procedure: (a) assessment of missing values from nearby stations and (b) adjustment of the biases in the probability density function of the filled values towards the existing data of the target. The methodology is assessed for its performance in filling-in the time series of a dense precipitation station network with large gaps on the island of Crete, Greece. The results indicate that quantile mapping can benefit the filled-in missing data statistics, as well as the wet day fraction. Conceptual limitations of the method are discussed, and correct methodology application guidance is provided.

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