Abstract
Measurements of snow cover depth and density made in 2001–2010 in the snow survey routes made it possible to study spatial and temporal variability of these characteristics on the territory of Russia. Maps of distribution of the snow cover depth and density in November, January and March for this period were constructed. Comparison of these maps with similar ones for the period from 1966 to 2000 did show that in November of the last years, significant (up to 40%) reduction in snow cover depth took place on the north-east of the European part in the river Pechora basin, in central regions of the West Siberia, and in north-east Siberia. As compared to the data of 1966–2000 the maximal snow depth for the period of 2001–2010 increased by 40% on the north of the Tyumen oblast, and in some regions on the south of West Siberia as well as of the European territory. In these areas, thickness of the seasonally melted layer of soil may increase for two reasons, i.e. due to the climate warming or as a result of worse conditions for the soil freezing when snow cover depth increases. In other regions, namely, the Northern Yakutia and areas on the east of the Lena River, as well as in central regions of the West Siberia maximal snow cover depth decreased by almost 15%. Growth of maximal density of the snow cover in the years of 2001–2010 relative to that in 1966–2000 does not exceed 6%. But in the Lena river basin decrease of the snow cover maximal density was noted more significant, namely by 20%. Inhomogeneous spatial variations of the snow cover during the period 2001–2010 relative to those of 1966–2000 could result in different spatial changes in thermal conditions for the existence of permafrost and seasonally frozen ground in Russia.
Highlights
Maps of distribution of the snow cover depth and density in November, January and March for this period were constructed. Comparison of these maps with simi lar ones for the period from 1966 to 2000 did show that in November of the last years, significant reduction in snow cover depth took place on the north-east of the European part in the river Pechora basin, in central regions of the West Siberia, and in north-east Siberia
На рис. 2 приведены максимальные и средние месячные значения толщины снежного покрова по данным маршрутных снегосъёмок за период 2001–2010 гг
Вме сте с тем на севере Якутии и в междуречье среднего течения рек Обь и Енисей максимальная толщина покрова снизилась почти на 15%
Summary
Пространственная и временнáя изменчивость толщины и плотности снежного покрова на территории России По данным маршрутных снегосъёмок установлена пространственная и временнáя изменчивость толщины и плотности снежного покрова на территории России с 2001 по 2010 г. Построены карты распределения средней толщины и плотности снежного покрова на территории России в ноябре, январе и марте.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.