Climate
Climate

The key weather and climate features in the northern hemisphere in August 2015

Air temperature

 

For the largest part of the month cold weather dominated over the Russian North. From Arkhangelsk to Taimyr, every decade of the month was colder than the norm. During the last one, the cold intensified and expanded far to the south, and covered the southern regions of the European part of Russia and Volga Region. For the last time, new records of the temperature minimums were registered not only in the north, but also near with Lower Volga, the Urals and Central region. At night the thermometer fell below 0°C, in some places there were recorded the values for -2 ... -8°C. As a result of the cold - negative anomalies of mean monthly temperatures were mentioned in Arkhangelsk Oblast, Komi Republic, on the Upper Volga and the Urals.

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The key weather and climate features in the northern hemisphere in July 2015

Air temperature

In July 2015 mean air temperature in the Northern Hemisphere has reached the absolute maximum in the history of regular meteorological observations in the world since 1891. This year is the fifth month with a record high average monthly air temperature. Previous record holders - February, March, May and June.

 

It was considerably hotter than usual last month in Europe and North Africa, the Middle East, Central Asia and southern Siberia, in the north of the Russian Far East and Alaska, in the east of the Canadian Arctic and northern Pacific coast of the United States. In contrast, abnormal cold seized the central and northern regions of European Russia and the Urals, a significant part of Canada and the United States, northern and tropical waters of the Atlantic Ocean, the western part of the temperate latitudes of the Pacific Ocean and the Horn of Africa.

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The key weather and climate features in the northern hemisphere in June 2015

Air temperature

June was abnormally warm in most parts of the Russian Federation. Only on Sakhalin Island, in the north of Primorye and the south of Kamchatka, partly in Kaliningrad, Pskov, Arkhangelsk Region and the Republic of Karelia mean monthly air temperature was a little lower than normal. In the rest of the country, it has exceeded the norm. In the Urals, western Siberia and the Lower Volga - by 4-6ºC. New temperature maxima during the month were many times recorded throughout the territory. On certain days in the Republic of Kalmykia, the Astrakhan Region and the eastern areas of the Volgograd and Saratov Regions the thermometer rose to the level of +40ºC and above. Also there was frost during the month, sometimes it comes up to new daily temperature minima. Thus, in the first decade of the month frosts happened in the north of the European territory, in Bashkiria, in the south of the Krasnoyarsk Territory, the Irkutsk region and the Trans-Baikal region, in the second decade - in the central region of Russia, and in the third decade - again on Sakhalin and in Trans-Baikal. Still the warm weather in June significantly prevailed over the cold the mean month temperature received the second rank among the highest values for this indicator yielded only by June 2012; the first half of the year was the warmest in the history of regular meteorological observations in the country.

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The key weather and climate features of May 2015 in the Northern Hemisphere

Air temperature In May, as in any other month of spring this year, the main anomaly of heat in Russia has concentrated in the European north and the Urals. The unseasonable warm was mentioned there for the entire month. The maximum temperature was recorded on the Arctic islands, in the Komi Republic, the Nenets and Yamal-Nenets Autonomous District. Mean month air temperature exceeded the norm by 4-7°C. In the Urals Federal District was the warmest May in history and in the Northwest this May was the second warmest.

Heat records were registered in other parts of Russia, for example, in the Irkutsk region in the first and in the center of the country (the Middle Volga and Chukotka) in the third decade of the month. Everywhere except the above areas, the anomalies did not exceed an average of + 1 ... 2°C. In the Far East May was even colder than normal. In the last case, there were records of minimum daily temperature to be mentioned. Frosts up to -5 ... -7°C were observed not only in the east, but also in Central Russia, Crimea and North Caucasus. In the first twenty days of the month the weather in the European territory was colder than usual. Mean decade temperature anomalies reached -2 ... -3°C.

All this has led to the fact that in Russia May 2015 is not among the warmest, but it can not be said about the whole spring. It was the fifth warmest spring in the history of regular meteorological observations, though it inferior to the record warm spring of last year for about 1 °C. So as in the spring of the last year, this time large positive temperature anomalies (up to + 6°C) had formed in the north of the European territory, in the Urals and Siberia. Everywhere in the country, spring again was warmer than normal, but this time anomalies were less than the anomalies of the last year, especially in the European territory.

 

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The key weather and climate features of April 2015 in the Northern Hemisphere

Air temperature

The abnormal heat was recorded during the whole month in such parts of Russia as Siberia, the Urals and the Arctic Region. Throughout the month, mean decadal air temperatures exceeded the norm by 4-10 ºC. The new daily temperature maxima were registered in the North Urals, in Novaya Zemlya, in the Irkutsk Region and in the Trans-Baikal Region. The climate spring came to the Russian North three weeks earlier than usual. Yenisei broke-up in the upper reaches of the river two weeks earlier than the average.

To the west and the east of the region, in the European part of Russia and in the Far East, as it usually happens in the spring heat and cold replaced each other in the frequent manner. Thus, to the west of the Urals, the heat of the first decade of the month with the daily temperature maxima was replaced by the abnormal cold in the second decade. During that time, there were recorded the night frosts for -3…-5ºC. They were recorded not only in the Central Russia, but also in the south, where the spring fieldwork had already begun. At the end of the month, the abnormal heat returned to the Central Russia. New daily air temperature maxima were recorded in Vologda, Kostroma, Tver, Nizhy Novgorod and other places. Such a confrontation of heat and cold has led to the fact that the mean month air temperature was about normal. Only in the Crimean Federal District, Southern Federal District and in the south of the Volga Federal District the month was colder than usual, while in the north of the country (Murmansk Region, Arkhangelsk Region, Komi Republic, and Nenets Autonomous Region) it was warmer.

 

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CLIMATE MONTHLY MEAN FIELDS FOR THE TERRITORY OF RUSSIA

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