GIS and field data based modelling of snow water equivalent in shrub tundra

Dvornikov, Y.A.; Khomutov, A.V.; Mullanurov, D.R.; Ermokhina, K.A.; Gubarkov, A.A.; Leibman, M.O.

Авторы: Dvornikov Y.A., Khomutov A.V., Mullanurov D.R., Ermokhina K.A., Gubarkov A.A., Leibman M.O.
Журнал: Fennia
Том: 193
Номер: 1
Год издания: 2015
Издательство: Suomen Metsatieteellinen Seura
Местоположение издательства: Finland
Первая страница: 53
Последняя страница: 65
DOI: 10.15356/2076-6734-2015-2-69-80
Аннотация: An approach for snow water equivalent (SWE) modelling in tundra environments has been developed for the test area on the Yamal peninsula. Detailed mapping of snow cover is very important for tundra areas under continuous permafrost conditions, because the snow cover affects the active layer thickness (ALT) and the ground temperature, acting as a heat-insulating agent. The information concerning snow cover with specific regime of accumulation can support studies of ground temperature distribution and other permafrost related aspects. Special attention has been given to the presence of shrubs and microtopography, specifically ravines in a modelling approach. The methodology is based on statistical analysis of snow survey data and on GIS (Geographical Information System) analysis of a range of parameters: topography, wind, and shrub vegetation. The topography significantly controls snow cover redistribution. This influence can be expressed as increase of snow depth on concave and decrease on convex surfaces. Specifically, snow depth was related to curvature in the study area with a correlation of R=0.83. An index is used to distinguish windward and leeward slopes in order to explain wind redistribution of snow. It is calculated from aspect data retrieved from a digital elevation model (obtained by field survey). It can be shown that shrub vegetation can serve as a ‘trap’ for wind-blown snow but is not a limiting factor for maximum snow depth, since the snow depth can be higher or lower than shrub height dependent on other factors.
Добавил в систему: Дворников Юрий Александрович

	ИСТИНА	Войти в систему Регистрация
	Интеллектуальная Система Тематического Исследования НАукометрических данных
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

Интеллектуальная Система Тематического Исследования НАукометрических данных

GIS and field data based modelling of snow water equivalent in shrub tundraстатья

Прикрепленные файлы