ARCHIVES (2013)


Do roku 2016 raport oznaczony numerem 1 był tworzony za okres od 1 kwietnia do 31 maja. Od roku 2017 analizy są wykonywane o dekadę wcześniej czyli 1 raport oznacza okres od 21 marca do 20 maja

Communication report regarding the incidences of drought conditions in Poland

Year: 2013; period: 07 (1.VI - 31.VII)

The Institute of Soil Science and Plant Cultivation - State Research Institute in accordance with an Act from the Minister of Agriculture and Rural Development has developed the climatic water balance for all Polish municipalities (3,064 municipalities), and based on the soils categories have identified in those municipalities the current agricultural drought risk for the following crops: winter and spring cereals, corn for grain and silage, potatoes, sugar beets, hops, tobacco, field vegetables, shrubs and fruit trees, strawberries and legumes.

In the seventh reporting period, i.e. from June 21 to July 31, 2013, IUNG-PIB does not state a risk of agricultural drought in Poland. The values of climatic water balance (CWB), which are the basis to assess the risk of drought in most areas, are negative, but these values for the above-mentioned crops are much higher than the critical value.

The lowest values of the CWB in Poland continues to occur on the Koszalin Coastland, except that the water shortage in the area has increased by 10 mm and ranged from -130 to -139 mm. A slightly smaller water deficit was recorded in the Mazowieckia Lowlands, where water shortages in some areas ranged from - 120 to - 129 mm. The relatively large water shortages have also been reported in the area of Lubuskie and Myśliborskie Lake district and the Szczecinska Lowlands, in the area of water deficit ranged from - 110 to - 119 mm. For most of the country, the CWB was lower than -80 mm, and in the southern parts of Poland, those values in many areas were close to zero.

CWB values, relative to the situation of the prior 10 days have decreased by an average of 64 mm. A large area of Poland (except mountains and adjacent areas) has a water deficit now. During the sixty day recorded period, a particularly large reduction of the CWB, by up to 100 mm in Mazowsze and Lublin region was recorded.

June this year in terms of thermal conditions was varied. The highest air temperature occurred in eastern Poland, reaching more than 17.5-18.5°C. East of the Wisła River, the temperature was higher than the long-term average (1971-2000) by more than 2°C, central Poland was higher by 1-2°C. To the west of the country, the air temperature was lower and reached from 15.5 to17°C. In the north - west and south - western Poland saw air temperatures close to the long-term average.

In the third ten days of July a substantial area of the country reported a very high air temperature, the mean daily temperature during a few days was higher than 20°C and the maximum temperature reached 35-37°C. The hottest was in the Lubuskie Lake District from 22 to 22.5 ° C and the coldest in the Suwalki region from 17.5 to 18.5°C.

Very high air temperatures and high insolation in the last ten days of July caused a high level of evapotranspiration during the sixty-day period. Relative to the situation from ten days before, this increase was as much as 30-35 mm, and the average evapotranspiration for the area of the country has increased by 23 mm where it was at 240 mm. The largest increase of evapotranspiration has occurred in the Wielkopolski Lake District, Południowowielkopolskiej Lowlands, Highlands: Śląsko-Krakowska, Małopolska and Lubelska.

Precipitation in June was very diverse. The lowest rainfall ranged from 30-60 mm and occurred in the north of the country (Embankment and Południowobałtycki Lake district), the highest was recorded on the Śląsko-Krakowska and Malopolska Highlands (160-180 mm) while in Sudety, very high rainfall was recorded, even as high as 200 mm.

The norms of precipitation almost throughout the country have been greatly exceeded; the highest was even up to 200% in the western parts of Południowowielkopolska Plain and the eastern areas Południowomazowieckich Hills and the Śląsko-Łużycka Lowlands. Only in the area of Gdansk and Koszalin Embankment, precipitation for June was close to 100% of the long-term norm.

Poland in terms of rainfall in the first ten days of July was very different. In the large areas of the country, the precipitation was very low, ranging from several to 10 mm. However, the highest rainfall was recorded locally in many parts of the Poland; they were up to 100 mm, both in the north and the south of the country. Such high rainfall was of a stormy origin. In the second ten days very low rainfall occurred in western Poland and Mazowsze, ranged from a few to 15 mm. High rainfall of over 100 mm was recorded in the Warmia and Mazury, Podlasie and Lublin and Malopolska regions. However, at the end of July, the lowest rainfall from a few mm to 10 mm was recorded in eastern Poland and the highest in the western and northern parts of the country, ranging from 50 to 70 mm.

Considering all of July, we found the lowest precipitation in Mazowsze and rainfall in this area ranged from 20 to 30 mm. However, the highest rainfall was recorded in the Mazury Lake District and the Zachodniosudecki foothills, which amounted to about 100 mm.

For crops, the relevant period is considered as favourable in terms moisture, as there are no areas with too much water excess, and a small deficit does not adversely affect the course of the growing season. The current weather is favourable for crops that are in the harvest as well as for those that will be harvested in August.