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10.3390/cli11020034
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Article

Efficiency of the NWC SAF Version 2021 CRRPh Precipitation Product: Comparison against Previous NWC SAF Precipitation Products and the Influence of Topography

by
Athanasios Karagiannidis
1,*,
José Alberto Lahuerta
2,
Xavier Calbet
2,
Llorenç Lliso
2,
Konstantinos Lagouvardos
1,
Vassiliki Kotroni
1 and
Pilar Ripodas
2
1
Institute for Environmental Research and Sustainable Development, National Observatory of Athens, 15236 Athens, Greece
2
Agencia Estatal de Meteorología, Leonardo Prieto Castro 8, 28040 Madrid, Spain
*
Author to whom correspondence should be addressed.
Climate 2023, 11(2), 34; https://doi.org/10.3390/cli11020034
Submission received: 28 December 2022 / Revised: 19 January 2023 / Accepted: 23 January 2023 / Published: 25 January 2023
(This article belongs to the Special Issue Climate: 10th Anniversary)
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Abstract

The algorithm of the Convective Rainfall Rate with Microphysical Properties (CRRPh) product of the 2021 version of the Nowcasting and Very Short Range Forecasting Satellite Application Facility (NWC SAF) presents innovative characteristics. It was developed employing principal components analysis to reduce the number of utilized parameters and uses the same mathematical scheme for day and night, simulating the missing visual channels and satellite-derived cloud water path information that is unavailable during nighttime. Applying adequate statistical methodologies and scores and using rain gauge data as ground truth, it is shown that the new algorithm appears to be significantly improved compared to its predecessors in regard to the delineation of the precipitation areas. In addition, it minimizes the day–night difference in the estimation efficiency, which is a remarkable achievement. The new product suffers from slightly higher errors in the precipitation accumulations. Finally, it is shown that topography does not seem to affect the estimation efficiency of the product. In light of these results, it is argued that, overall, the new algorithm outperforms its predecessors and, possibly after adequate adaptations, can be used as a real-time total precipitation product.
Keywords: satellites; NWC SAF; nowcasting; precipitation; estimation efficiency; categorical statistics; error statistics; topography satellites; NWC SAF; nowcasting; precipitation; estimation efficiency; categorical statistics; error statistics; topography
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MDPI and ACS Style

Karagiannidis, A.; Lahuerta, J.A.; Calbet, X.; Lliso, L.; Lagouvardos, K.; Kotroni, V.; Ripodas, P. Efficiency of the NWC SAF Version 2021 CRRPh Precipitation Product: Comparison against Previous NWC SAF Precipitation Products and the Influence of Topography. Climate 2023, 11, 34. https://doi.org/10.3390/cli11020034

AMA Style

Karagiannidis A, Lahuerta JA, Calbet X, Lliso L, Lagouvardos K, Kotroni V, Ripodas P. Efficiency of the NWC SAF Version 2021 CRRPh Precipitation Product: Comparison against Previous NWC SAF Precipitation Products and the Influence of Topography. Climate. 2023; 11(2):34. https://doi.org/10.3390/cli11020034

Chicago/Turabian Style

Karagiannidis, Athanasios, José Alberto Lahuerta, Xavier Calbet, Llorenç Lliso, Konstantinos Lagouvardos, Vassiliki Kotroni, and Pilar Ripodas. 2023. "Efficiency of the NWC SAF Version 2021 CRRPh Precipitation Product: Comparison against Previous NWC SAF Precipitation Products and the Influence of Topography" Climate 11, no. 2: 34. https://doi.org/10.3390/cli11020034

APA Style

Karagiannidis, A., Lahuerta, J. A., Calbet, X., Lliso, L., Lagouvardos, K., Kotroni, V., & Ripodas, P. (2023). Efficiency of the NWC SAF Version 2021 CRRPh Precipitation Product: Comparison against Previous NWC SAF Precipitation Products and the Influence of Topography. Climate, 11(2), 34. https://doi.org/10.3390/cli11020034

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