Assessment of the accuracy of the sea surface temperature of the Baltic sea

DOI: 10.35595/2414-9179-2024-1-30-604-616

View or download the article (Rus)

About the Authors

Ekaterina V. Zakharova

Zubov State Oceanographic Institute,
6 build. 1, Kropotkinsky ln., Moscow, 119991, Russia,
E-mail: katezakharova33@gmail.com

Vladimir V. Fomin

Zubov State Oceanographic Institute,
6 build. 1, Kropotkinsky ln., Moscow, 119991, Russia,

Hydrometcenter of Russia,
13 build. 1, Bolshoy Predtechensky ln., Moscow, 123376, Russia,

Marchuk Institute of Numerical Mathematics of the RAS,
8, Gubkina str., Moscow, 119333, Russia,

E-mail: vladimirfomin@live.com

Abstract

The paper presents the results of a comparison of satellite sea surface temperature (SST) processing level L3S (SST L3S) and L4 (SST L4) with contact measurement data from 41 stations located in the coastal part of the Baltic Sea. Mean absolute deviation (MAD) of SST L4 and L3S, respectively, varies from 0.6 and 0.59°C in March to 2.0 and 2.17°C in May, and the whole year average MAD is 1.27 and 1.37°C. The SST L4 and L3S bias overall year is -0.08 and -0.09°C, however, consideration of the monthly average values allows us to trace significant variability during 2018. The SST L4 and L3S bias, respectively, varies from -0.85 and -1.11°C in May to 0.84 and 1.1°C in December, bias has a pronounced seasonal variation and heterogeneity over space. SST is underestimated from February to June and overestimated from July to December near the coastline of the Baltic Sea. The largest MAD in all seasons of the year are observed at stations on the eastern coast of the Gulf of Bothnia, at the entrance of the Gulf of Finland, near the island of Saaremaa and in the Gulf of Riga. The SST L4 data has higher accuracy compared to the SST L3S data, while the SST difference is negligible and in both arrays the largest bias and MAD are observed in the coastal zone.

Keywords

satellite sea surface temperature, SST, Baltic Sea

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For citation: Zakharova E.V., Fomin V.V. Assessment of the accuracy of the sea surface temperature of the Baltic sea. InterCarto. InterGIS. Moscow: MSU, Faculty of Geography, 2024. V. 30. Part 1. P. 604–616. DOI: 10.35595/2414-9179-2024-1-30-604-616 (in Russian)