Changes in cloudiness contribute to changing seasonality in the Baltic Sea region

• Autorzy: Post Piia , Aun Margit

Identyfikatory

DOI

10.1016/j.oceano.2023.11.004

• Języki publikacji: EN

Abstrakty

EN

In the Baltic Sea region, a significant increase in solar radiation has been detected during the past half-century. Changes in shortwave irradiance are associated with atmospheric transparency and cloudiness parameters like cloud fraction and albedo. One of the most important reasons for day-to-day changes in cloudiness is the synoptic-scale atmospheric circulation; thus, we look for reasons for solar radiation trends due to changes in atmospheric circulation. We analysed regional time series and trends from satellite-based cloud climate data record CLARA-A2 for the Baltic Sea region in 1982–2018. As the rise in solar radiation depends on the seasonally averaged values of total fractional cloud cover (CFC), surface incoming shortwave radiation (SIS) and occurrences of circulation types were analysed. We show that the shift in seasonality connected to the earlier accumulated sums of SIS is at least partly explained by the changes in synoptic-scale atmospheric circulation.

Słowa kluczowe

EN

Northern Europe; cloud fraction; seasonal shift; shortwave irradiance; Baltic Sea

• Wydawca: Polish Academy of Sciences, Institute of Oceanology ; Elsevier
• Czasopismo: Oceanologia
• Rocznik: 2024
• Tom: Vol. 66 (1)
• Strony: 91--98
• Opis fizyczny: Bibliogr. 22 poz., map., rys., tab., wykr.

Twórcy

autor

Post Piia

• Institute of Physics, University of Tartu, Tartu, Estonia

autor

Aun Margit

• Tartu Observatory, University of Tartu, Tõravere, Estonia

Bibliografia

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