Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 46569 10.2205/2020ES000753 ОРИГИНАЛЬНЫЕ СТАТЬИ ORIGINAL ARTICLES ОРИГИНАЛЬНЫЕ СТАТЬИ Interannual variability of moistening in the European Russia Interannual variability of moistening in the European Russia Malinin V N Malinin V N Гордеева С. М. Gordeeva S. M. gordeeva@rshu.ru Mitina Yu V Mitina Yu V Kuleshova A V Kuleshova A V Russian State Hydrometeorological University ru Russian State Hydrometeorological University ru Российский государственный гидрометеорологический университет Россия Russian State Hydrometeorological University Russian Federation Russian State Hydrometeorological University ru Russian State Hydrometeorological University ru Russian State Hydrometeorological University ru Russian State Hydrometeorological University ru 21 3 29 10 2021 https://rjes.ru/en/nauka/article/46569/view

The article discusses the features of large-scale spatial and temporal variability of moistening(potential evapotranspiration, precipitation, potential evapotranspiration coefficient) in theEuropean Russia (ER) for 1966-2017. Much attention is paid to abnormal moisteningconditions (droughts and excessive moistening) resulting in significant ecological and economicaldamage. The All-Russia Research Institute of Hydrometeorological Information archive hasserved as a source of initial information. The most physically based modified method ofM. I. Budyko has been used to estimate the potential evapotranspiration. A series of originalmaps of components of moistening has been constructed, a number of maps for the ER beingconstructed for the first time. The presence of positive trends in the annual values of potentialevapotranspiration and precipitation has been established, the distribution of which beingpatchy. The highest trends have been noted in the southern European Russia, the distributionof positive trends in potential evapotranspiration being patchy as well, with minimumestimates of 3.7 mm per year in the Syktyvkar area. Due to the similar trend character inpotential evapotranspiration and precipitation there takes place the smoothening in potentialevapotranspiration coefficients resulting in their trends being statistically insignificant overmost of the ER. The interannual variation of components of moistening is characterized by thepresence of powerful anomalies in the form of extreme droughts and excessive moistening. Theirformation is due to the complete coincidence of significant positive potential evapotranspirationanomalies and negative precipitation anomalies in most of the ER, and vice versa. Unevennesshas been revealed in the spatial distribution of severe droughts and excessive moistening of theterritory: the most powerful droughts are concentrated mainly in the forest-steppe zone (withmaximum in the Krasnoslobodsk and Elatma regions). Excessive moistening is predominantlypatchy in nature, being practically absent in the northern regions of the ER. A decrease inpotential evapotranspiration has appeared to be the predominant factor in the formation ofexcessive moistening, a decrease in precipitation being the one in the formation of droughts.

The article discusses the features of large-scale spatial and temporal variability of moistening(potential evapotranspiration, precipitation, potential evapotranspiration coefficient) in theEuropean Russia (ER) for 1966-2017. Much attention is paid to abnormal moisteningconditions (droughts and excessive moistening) resulting in significant ecological and economicaldamage. The All-Russia Research Institute of Hydrometeorological Information archive hasserved as a source of initial information. The most physically based modified method ofM. I. Budyko has been used to estimate the potential evapotranspiration. A series of originalmaps of components of moistening has been constructed, a number of maps for the ER beingconstructed for the first time. The presence of positive trends in the annual values of potentialevapotranspiration and precipitation has been established, the distribution of which beingpatchy. The highest trends have been noted in the southern European Russia, the distributionof positive trends in potential evapotranspiration being patchy as well, with minimumestimates of 3.7 mm per year in the Syktyvkar area. Due to the similar trend character inpotential evapotranspiration and precipitation there takes place the smoothening in potentialevapotranspiration coefficients resulting in their trends being statistically insignificant overmost of the ER. The interannual variation of components of moistening is characterized by thepresence of powerful anomalies in the form of extreme droughts and excessive moistening. Theirformation is due to the complete coincidence of significant positive potential evapotranspirationanomalies and negative precipitation anomalies in most of the ER, and vice versa. Unevennesshas been revealed in the spatial distribution of severe droughts and excessive moistening of theterritory: the most powerful droughts are concentrated mainly in the forest-steppe zone (withmaximum in the Krasnoslobodsk and Elatma regions). Excessive moistening is predominantlypatchy in nature, being practically absent in the northern regions of the ER. A decrease inpotential evapotranspiration has appeared to be the predominant factor in the formation ofexcessive moistening, a decrease in precipitation being the one in the formation of droughts.

 Potential evapotranspiration precipitation moistening European Russia drought trend Potential evapotranspiration precipitation moistening European Russia drought trend The work has been carried out within the framework of the Government Contract FSZU- 2020-0009 “Study of physical, chemical and biological processes in the atmosphere and hydrosphere under conditions of climate change and anthropogenic impacts”.

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