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Article

Effect of Aerosols, Tropospheric NO2 and Clouds on Surface Solar Radiation over the Eastern Mediterranean (Greece)

Laboratory of Atmospheric Physics, Physics Department, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
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Academic Editor: Yolanda Sola
Remote Sens. 2021, 13(13), 2587; https://doi.org/10.3390/rs13132587
Received: 10 May 2021 / Revised: 19 June 2021 / Accepted: 29 June 2021 / Published: 1 July 2021
(This article belongs to the Special Issue Aerosol and Cloud Properties Retrieval by Satellite Sensors)
In this work, the effect that two basic air quality indexes, aerosols and tropospheric NO2, exert on surface solar radiation (SSR) is studied, along with the effect of liquid and ice clouds over 16 locations in Greece, in the heart of the Eastern Mediterranean. State-of-the-art satellite-based observations and climatological data for the 15-year period 2005–2019, and a radiative transfer system based on a modified version of the Santa Barbara DISORT Atmospheric Radiative Transfer (SBDART) model are used. Our SSR simulations are in good agreement with ground observations and two satellite products. It is shown that liquid clouds dominate, with an annual radiative effect (RE) of −36 W/m2, with ice clouds (−19 W/m2) and aerosols (−13 W/m2) following. The radiative effect of tropospheric NO2 is smaller by two orders of magnitude (−0.074 W/m2). Under clear skies, REaer is about 3–4 times larger than for liquid and ice cloud-covered skies, while RENO2 doubles. The radiative effect of all the parameters exhibits a distinct seasonal cycle. An increase in SSR is observed for the period 2005–2019 (positive trends ranging from 0.01 to 0.52 W/m2/year), which is mostly related to a decrease in the aerosol optical depth and the liquid cloud fraction. View Full-Text
Keywords: surface solar radiation; aerosols; clouds; tropospheric NO2; Greece; SBDART; MODIS; CALIPSO; CM SAF; CERES surface solar radiation; aerosols; clouds; tropospheric NO2; Greece; SBDART; MODIS; CALIPSO; CM SAF; CERES
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MDPI and ACS Style

Alexandri, G.; Georgoulias, A.K.; Balis, D. Effect of Aerosols, Tropospheric NO2 and Clouds on Surface Solar Radiation over the Eastern Mediterranean (Greece). Remote Sens. 2021, 13, 2587. https://doi.org/10.3390/rs13132587

AMA Style

Alexandri G, Georgoulias AK, Balis D. Effect of Aerosols, Tropospheric NO2 and Clouds on Surface Solar Radiation over the Eastern Mediterranean (Greece). Remote Sensing. 2021; 13(13):2587. https://doi.org/10.3390/rs13132587

Chicago/Turabian Style

Alexandri, Georgia, Aristeidis K. Georgoulias, and Dimitris Balis. 2021. "Effect of Aerosols, Tropospheric NO2 and Clouds on Surface Solar Radiation over the Eastern Mediterranean (Greece)" Remote Sensing 13, no. 13: 2587. https://doi.org/10.3390/rs13132587

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