气候变化领域集成服务门户(CCPortal): Topographic control of snowpack distribution in a small catchment in the central Spanish Pyrenees: Intra- and inter-annual persistence

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DOI	10.5194/tc-8-1989-2014
	Topographic control of snowpack distribution in a small catchment in the central Spanish Pyrenees: Intra- and inter-annual persistence
	Revuelto J.; López-Moreno J.I.; Azorin-Molina C.; Vicente-Serrano S.M.
发表日期	2014
ISSN	19940416
卷号	8 期号:5
英文摘要	In this study we analyzed the relations between terrain characteristics and snow depth distribution in a small alpine catchment located in the central Spanish Pyrenees. Twelve field campaigns were conducted during 2012 and 2013, which were years characterized by very different climatic conditions. Snow depth was measured using a long range terrestrial laser scanner and analyses were performed at a spatial resolution of 5 m. Pearson's r correlation, multiple linear regressions (MLRs) and binary regression trees (BRTs) were used to analyze the influence of topography on the snow depth distribution. The analyses were used to identify the topographic variables that best explain the snow distribution in this catchment, and to assess whether their contributions were variable over intra- and interannual timescales. The topographic position index (index that compares the relative elevation of each cell in a digital elevation model to the mean elevation of a specified neighborhood around that cell with a specific shape and searching distance), which has rarely been used in these types of studies, most accurately explained the distribution of snow. The good capability of the topographic position index (TPI) to predict snow distribution has been observed in both, MLRs and BRTs for all analyzed days. Other variables affecting the snow depth distribution included the maximum upwind slope, elevation and northing. The models developed to predict snow distribution in the basin for each of the 12 survey days were similar in terms of the explanatory variables. However, the variance explained by the overall model and by each topographic variable, especially those making a lesser contribution, differed markedly between a year in which snow was abundant (2013) and a year when snow was scarce (2012), and also differed between surveys in which snow accumulation or melting conditions dominated in the preceding days. The total variance explained by the models clearly decreased for those days on which the snowpack was thinner and more patchily. Despite the differences in climatic conditions in the 2012 and 2013 snow seasons, similarities in snow distributions patterns were observed which are directly related to terrain topographic characteristics. © 2014 Hydrology and Earth System Sciences (HESS).
学科领域	annual variation; catchment; digital elevation model; snowpack; spatial distribution; spatial resolution; timescale; topographic mapping; Pyrenees; Spain
语种	英语
scopus关键词	annual variation; catchment; digital elevation model; snowpack; spatial distribution; spatial resolution; timescale; topographic mapping; Pyrenees; Spain
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120036
作者单位	Instituto Pirenaico de Ecología, Consejo Superior de Investigaciones Científicas (IPE-CSIC), Departamento de Procesos Geoambientales y Cambio Global, Campus de Aula Dei, P.O. Box 13034, Zaragoza, 50059, Spain
推荐引用方式 GB/T 7714	Revuelto J.,López-Moreno J.I.,Azorin-Molina C.,et al. Topographic control of snowpack distribution in a small catchment in the central Spanish Pyrenees: Intra- and inter-annual persistence[J],2014,8(5).
APA	Revuelto J.,López-Moreno J.I.,Azorin-Molina C.,&Vicente-Serrano S.M..(2014).Topographic control of snowpack distribution in a small catchment in the central Spanish Pyrenees: Intra- and inter-annual persistence.Cryosphere,8(5).
MLA	Revuelto J.,et al."Topographic control of snowpack distribution in a small catchment in the central Spanish Pyrenees: Intra- and inter-annual persistence".Cryosphere 8.5(2014).