We are pleased to announce another publication by Dr Krzysztof Bartoszek published in the latest issue of International Journal of Climatology:
Matuszko D., Bartoszek K., Soroka J., 2023: Long-term variability of the low-level cloud base height in Poland. International Journal of Climatology, 1-17.
The aim of the study is to characterize the long-term variability of the low-level cloud base heights (CBH) in Poland in the years 1971–2020. Data were used from 6 weather stations belonging to the Institute of Meteorology and Water Management - the National Research Institute (IMWM-NRI), where CBH was first measured using the IWO device and, since the 1990s, using a ceilometer. The analysis allowed for data from 8 observation periods, which referred to several height ranges (between the ground surface and 2,500 m a.s.l.). In the analysed multi-year period, in the cool half of the year, the height of the Cumulonimbus cloud bases increased significantly, i.e. the number of cases increased at a height of >1,000 m and, in the warm half of the year, at >1,500 m. In recent years, the number of cases of the Cumulus cloud with a base at a height between 300 and 999 m has clearly decreased, while it has increased at a height of 1,000-1,499 m (in October-March) and 1,500-1,999 m (April-September). A similar increase in CBH was found in the case of the Stratocumulus cloud (their greater share between 1,500 and 2,499 m). The positive upward trend in the base height of most low-level clouds can be explained by a statistically significant increase in temperature and a decrease in relative air humidity in the lower troposphere.
Link to article (Open Access)
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