Influence of air pressure patterns over Europe on solar radiation variability over Poland (1986–2015)

Abstract

The key factor that affects the inflow of radiant energy to the Earth's surface is the circulation of the atmosphere (caused by uneven distribution of air pressure on the globe) and the related changes in the amount of aerosols and cloudiness. This paper identified the areas in the Euro-Atlantic region where the air pressure change had a significant impact on global solar radiation (GSR) changes over Poland, during the period 1986-2015. In general, growing GSR sums over Poland are to some extent related to the positive phase of the NAO (simultaneous pressure growth in the area of the Azores High and the pressure decrease in the area of the Icelandic Low). Correlation coefficient between the NAO index and GSR over Poland equals 0.18 (statistically significant at α = 0.05). In turn, in summer and autumn the pressure growth in southern Scandinavia results in a significant increase in the amount of GSR over Poland. Days with extremely large GSR sums (above the 95th percentile) are also prompted by the Azores High ridge which covers Central and Southern Europe, and by air mass inflow from the Atlantic.

Coherency and time lag analyses between MODIS vegetation indices and climate across forests and grasslands in the European temperate zone

“…It should be noted that the term "anomaly", which is commonly used in climatological studies (e.g. Kulesza, 2021), should be interpreted as a "deviation from the mean value". Finally, spatially averaged 252-element (21 years × 12 months) time series of NDVI (or EVI) anomalies in respective vegetation masks were prepared.…”

Coherency and time lag analyses between MODIS vegetation indices and climate across forest and grasslands in European temperate zone

“…It should be noted that the term "anomaly", which is commonly used in climatological studies (e.g. Kulesza, 2021), should be interpreted as a "deviation from the mean value". Finally, spatially averaged 252-element (21 years x 12 months) time series of NDVI (or EVI) anomalies in respective vegetation masks were prepared.…”

Remote sensing of solar surface radiation – a reflection of concepts, applications and input data based on experience with the effective cloud albedo

“…All CM SAF Climate Data Records (CDRs) (Posselt et al, 2011b;Müller et al, 2015;Pfeifroth et al, 2019b) have been retrieved with the CALSAT approach coupled with a clear-sky model based on the eigenvector hybrid LUT method (Mueller et al, 2009). The respective data sets belong to the most used and validated data sets in the world covering a wide field of applications, as can be seen from recent publications (Wild et al, 2021;Kulesza, 2021;Alexandri et al, 2021;Gardner et al, 2021b, a;Farahat et al, 2021;Yang and Gueymard, 2021;Kulesza and Bojanowski, 2021;Fountoulakis et al, 2021;Drücke et al, 2021;Daggash and MacDowell, 2021). CAL-based SSI data are characterised by a high accuracy and homogeneity, which is a reason for the popularity, even up to quality control of ground-based stations (Urraca et al, 2017(Urraca et al, , 2020.…”