globalchange  > 影响、适应和脆弱性
DOI: 10.5194/tc-12-1027-2018
Scopus记录号: 2-s2.0-85044409220
论文题名:
Changes in Andes snow cover from MODIS data, 2000-2016
作者: Saavedra F; A; , Kampf S; K; , Fassnacht S; R; , Sibold J; S
刊名: Cryosphere
ISSN: 19940416
出版年: 2018
卷: 12, 期:3
起始页码: 1027
结束页码: 1046
语种: 英语
英文摘要: The Andes span a length of 7000 km and are important for sustaining regional water supplies. Snow variability across this region has not been studied in detail due to sparse and unevenly distributed instrumental climate data. We calculated snow persistence (SP) as the fraction of time with snow cover for each year between 2000 and 2016 from Moderate Resolution Imaging Spectroradiometer (MODIS) satellite sensors (500 m, 8-day maximum snow cover extent). This analysis is conducted between 8 and 36- S due to high frequency of cloud (>30% of the time) south and north of this range. We ran Mann-Kendall and Theil-Sens analyses to identify areas with significant changes in SP and snowline (the line at lower elevation where SPD20 %). We evaluated how these trends relate to temperature and precipitation from Modern-Era Retrospective Analysis for Research and Applications-2 (MERRA2) and University of Delaware datasets and climate indices as El Niño-Southern Oscillation (ENSO), Southern Annular Mode (SAM), and Pacific Decadal Oscillation (PDO). Areas north of 29° S have limited snow cover, and few trends in snow persistence were detected. A large area (34 370 km2) with persistent snow cover between 29 and 36- S experienced a significant loss of snow cover (2-5 fewer days of snow year-1). Snow loss was more pronounced (62% of the area with significant trends) on the east side of the Andes.We also found a significant increase in the elevation of the snowline at 10-30myear1 south of 29- 30° S. Decreasing SP correlates with decreasing precipitation and increasing temperature, and the magnitudes of these correlations vary with latitude and elevation. ENSO climate indices better predicted SP conditions north of 31° S, whereas the SAM better predicted SP south of 31° S. © 2018 Author(s) 2018.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75394
Appears in Collections:影响、适应和脆弱性
气候变化与战略

Files in This Item:

There are no files associated with this item.


作者单位: Departamento de Ciencias Geográficas, Facultad de Ciencias Naturales y Exactas, Universidad de Playa Ancha, Leopoldo Carvallo 270, Playa Ancha, Valparaíso, Chile; Centro de Estudios Avanzados, Universidad de Playa Ancha, Traslaviña 450, Viña del Mar, Chile; Department of Ecosystem Science and Sustainability, Colorado State University, Fort CollinsCO, United States; Cooperative Institute for Research in the Atmosphere, Colorado State University, Fort Collins, CO, United States; Natural Resources Ecology Laboratory, Colorado State University, Fort Collins, CO, United States; Geographisches Institut, Georg-August-Universität Göttingen, Göttingen, Germany; Department of Anthropology, Colorado State University, Fort Collins, CO, United States

Recommended Citation:
Saavedra F,A,, Kampf S,et al. Changes in Andes snow cover from MODIS data, 2000-2016[J]. Cryosphere,2018-01-01,12(3)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Saavedra F]'s Articles
[A]'s Articles
[, Kampf S]'s Articles
百度学术
Similar articles in Baidu Scholar
[Saavedra F]'s Articles
[A]'s Articles
[, Kampf S]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Saavedra F]‘s Articles
[A]‘s Articles
[, Kampf S]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.