5 research outputs found
Ледовитость моря Лаптевых в условиях колебаний климата Арктики
Get PDFThe analysis on long-term fluctuations of the Laptev Sea ice coverage over a period of 1940–2014 has been performed. Large-scale cycle in ice extent anomalies change with high duration of growth phase and abbreviated phase of its reduction in Western part of the sea was emphasized. It is shown that variation of ice area reduction lasted from 1943 till 1995 indicates the slight impact of global warming on ice clearing process. But the following sharp reduction of ice area from 1995 till 2013 can be hypothetically referred to the beginning of man-caused impact on Arctic climate.Проведен анализ долговременных колебаний ледовитости моря Лаптевых за период 1940–2014 гг. Выделен крупномасштабный цикл в изменении аномалий ледовитости с высокой продолжительностью ветви его роста и сокращенной его нисходящей ветвью в западной части моря. Показано, что средняя площадь сокращения льдов в море, сохранявшаяся с 1943 по 1995 г., свидетельствует о слабом влиянии глобального потепления на процесс очищения моря ото льдов. Однако последовавшее резкое сокращение площади ледяного покрова в течение 1995–2013 гг. может быть гипотетически отнесено к началу антропогенного воздействия на климат Арктики
Investigation of honey bee (Apis mellifera L.) breeds and populations for developing criteria for genetic certification of bees
No full textRole of hydrometeorological factors and solar activity in interannual variability of ice extent in the East Siberian Sea (in Russian)
Get PDFInterannual changes of the summer ice coverage were investigated, and the role of hydrometeorological factors and solar activity in long-period fluctuations of the ice area in the East Siberian Sea was determined. Multivariate statistical analysis of time series of the ice cover, hydrometeorological elements, and the solar activity (SA), was performed for the period from 1950 to 2012 with regard for the cross-correlations of the analyzed variables that made possible to develop the equations of interannual fluctuations of the ice coverage in the East Siberian Sea in August and September. The equations include the following variables: air temperature in June–August of the current year TVI‑VIII; the atmospheric circulation presented by indices of Arctic oscillation (Arctic Oscillation, AO), Arctic dipole (Arctic Dipole, AD), Pacific North American oscillation (Pacific North American Oscillation, PNA); average annual runoff of river waters into the Laptev and East Siberian seas (RivLES) with a time shift of one and two years; average annual index of the North Atlantic thermal state (AMO) with a time lag of eight years; solar activity SA, presented by the average annual Wolf number with advancing of one year. Diagnostic calculations of the ice area by the obtained equations using the actual values of the indices did show a good agreement between the actual and calculated values in August and September from 1950 to 2012. These equations were used to calculate contribution of each factor to the general dispersion of fluctuations of the ice coverage. The most important factors influencing the ice cover of the Sea in August and September are: the air temperature; the atmospheric circulation, presented by the Arctic Oscillation at the end of winter; and Atlantic waters which are characterized by AMO with a time lag of eight years. The role of other factors, i.e. summer atmospheric circulation, river runoff into the above seas, and 11-year cycle of solar activity were found to be equal to only 5–10% for each. Basing on these estimates, it has been concluded that the obtained statistical equations may be used as the diagnostic models of interannual changes in the ice coverage
Роль гидрометеорологических факторов и солнечной активности в межгодовых изменениях площади льдов Восточно-Сибирского моря
Get PDFInterannual changes of the summer ice coverage were investigated, and the role of hydrometeorological factors and solar activity in long-period fluctuations of the ice area in the East Siberian Sea was determined. Multivariate statistical analysis of time series of the ice cover, hydrometeorological elements, and the solar activity (SA), was performed for the period from 1950 to 2012 with regard for the cross-correlations of the analyzed variables that made possible to develop the equations of interannual fluctuations of the ice coverage in the East Siberian Sea in August and September. The equations include the following variables: air temperature in June–August of the current year TVI‑VIII; the atmospheric circulation presented by indices of Arctic oscillation (Arctic Oscillation, AO), Arctic dipole (Arctic Dipole, AD), Pacific North American oscillation (Pacific North American Oscillation, PNA); average annual runoff of river waters into the Laptev and East Siberian seas (RivLES) with a time shift of one and two years; average annual index of the North Atlantic thermal state (AMO) with a time lag of eight years; solar activity SA, presented by the average annual Wolf number with advancing of one year. Diagnostic calculations of the ice area by the obtained equations using the actual values of the indices did show a good agreement between the actual and calculated values in August and September from 1950 to 2012. These equations were used to calculate contribution of each factor to the general dispersion of fluctuations of the ice coverage. The most important factors influencing the ice cover of the Sea in August and September are: the air temperature; the atmospheric circulation, presented by the Arctic Oscillation at the end of winter; and Atlantic waters which are characterized by AMO with a time lag of eight years. The role of other factors, i.e. summer atmospheric circulation, river runoff into the above seas, and 11-year cycle of solar activity were found to be equal to only 5–10% for each. Basing on these estimates, it has been concluded that the obtained statistical equations may be used as the diagnostic models of interannual changes in the ice coverage.Получены статистические уравнения межгодовых колебаний площади льдов Восточно-Сибирского моря в августе и сентябре. Рассчитан вклад каждого фактора в общую дисперсию колебаний ледовитости. К преобладающим факторам, влияющим на площадь льдов в эти месяцы, относятся: температура воздуха; Арктическое колебание в конце зимы; индекс теплового состояния Северной Атлантики. Вклад в общую дисперсию режима летней атмосферной циркуляции, речного стока, расхода вод через Берингов пролив и солнечной активности находится в пределах 5–10% для каждого фактора.
