Patterns of trends in niveograph characteristics across the western United States from snow telemetry data

作     者：S.R.FASSNACHT J.I.LÓPEZ-MORENO S.R.FASSNACHT;J.I.L(O)PEZ-MORENO

作者机构：ESS-Watershed ScienceColorado State UniversityFort CollinsCO 80523-1472USA Cooperative Institute for Research in the AtmosphereColorado State UniversityFort CollinsCO 80523-1375USA Natural Resources Ecology LaboratoryColorado State UniversityFort CollinsCO 80523-1499USA Instituto Pirenaico de EcologíaCSICCampus de Aula Dei 50080Spain 

出 版 物：《Frontiers of Earth Science》 (地球科学前沿（英文版）)

年 卷 期：2020年第14卷第2期

页      面：315-325页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：Funding for this work was provided by the NASA Terrestrial Hydrology Program Project NNX11AQ66G“Improved Characterization of Snow Depth in Complex Terrain Using Satellite Lidar Altimetry”(Principal Investigator Dr.Michael Jasinski from NASA-Goddard Space Flight Center) 

主　　题：snow water equivalent cluster analysis SNOTEL 

摘      要：The snowpack is changing across the globe,as the climate warms and *** used daily snow water equivalent(SWE)niveograph(time series of SWE)data from 458 snow telemetry(SNOTEL)stations for the period 1982 through *** indices based on amount,timing,time length,and rates were used to describe the annual temporal evolution in SWE accumulation and *** trends in these annual indices were computed over the time period for each station using the Theil-Sen *** trends were then clustered into four groups to determine the spatial pattern of SWE *** and precipitation data were extracted from the PRISM data set,due to the shorter time period of temperature measurement at the SNOTEL *** show that SNOTEL stations can be clustered in four clusters according to the observed trends in snow *** 1 stations are mostly located in the Eastern-and South-eastern most parts of the study area and they exhibit a generalized decrease in the indices related with peak SWE and snow *** stations recorded a negative trend in precipitation and an increase in *** 4 that is mostly restricted to the North and North-west of the study area shows an almost opposite pattern to cluster 1,due to months with positive trends and a more moderate increase of *** grouped in clusters 2 and 3 appear mixed with clusters 1 and 4,in general they show very little trends in the snow indices.