气候变化领域集成服务门户(CCPortal): Climate and topographic controls on snow phenology dynamics in the Tienshan Mountains, Central Asia

CCPortal

DOI	10.1016/j.atmosres.2019.104813
	Climate and topographic controls on snow phenology dynamics in the Tienshan Mountains, Central Asia
	Li Y.; Chen Y.; Li Z.
发表日期	2020
ISSN	0169-8095
卷号	236
英文摘要	Although previous studies have characterized changes in seasonal snow cover or made predictions about snow cover in a changing climate, no comprehensive spatiotemporal analysis of snow phenology has been presented for the Tienshan Mountains, Central Asia. Relying on daily cloud-free snow cover fraction products originating from Moderate Resolution Imaging Spectroradiometer (MODIS) for 2002/03–2017/18, the snow phenology parameters (i.e., snow cover duration [SCD], snow onset date [SOD] and snow end date [SED]) are derived for each hydrological year within the study period and the characteristics analyzed for the Tienshan Mountains. The spatiotemporal changes of snow phenology have strong altitude dependence. The mean gradients of SCD, SOD, and SED with elevation are 6.0, −2.55, and 3.44 d/100 m, respectively. Because of differences in solar radiation and water vapor sources, the north-facing areas generally have a higher SCD, earlier SOD, and later SED than south-facing areas. Also, the trends of the snow phenology parameters at high and low altitudes show opposite changes. Consistent with the increase in snow cover area in recent years, SCD for the entire Tienshan region showed a clear uptick, especially in Northern Tienshan. This prolonged SCD was more related to advanced SOD than to SED, as decreased temperature and increased precipitation in autumn are conducive to snow accumulation. © 2019 Elsevier B.V.
英文关键词	Climate change; Snow cover; Snow phenology; Tienshan Mountains
学科领域	Biology; Climate change; Landforms; Radiometers; Moderate resolution imaging spectroradiometer; Seasonal snow cover; Snow cover durations; Snow covers; Spatio-temporal changes; Spatiotemporal analysis; Tienshan Mountains; Topographic control; Snow; air temperature; autumn; climate change; MODIS; precipitation assessment; snow cover; solar radiation; spatiotemporal analysis; topography; water vapor; Central Asia; Tien Shan
语种	英语
scopus关键词	Biology; Climate change; Landforms; Radiometers; Moderate resolution imaging spectroradiometer; Seasonal snow cover; Snow cover durations; Snow covers; Spatio-temporal changes; Spatiotemporal analysis; Tienshan Mountains; Topographic control; Snow; air temperature; autumn; climate change; MODIS; precipitation assessment; snow cover; solar radiation; spatiotemporal analysis; topography; water vapor; Central Asia; Tien Shan
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120480
作者单位	State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Department of geography, Dartmouth collegeNH 03220, United States
推荐引用方式 GB/T 7714	Li Y.,Chen Y.,Li Z.. Climate and topographic controls on snow phenology dynamics in the Tienshan Mountains, Central Asia[J],2020,236.
APA	Li Y.,Chen Y.,&Li Z..(2020).Climate and topographic controls on snow phenology dynamics in the Tienshan Mountains, Central Asia.Atmospheric Research,236.
MLA	Li Y.,et al."Climate and topographic controls on snow phenology dynamics in the Tienshan Mountains, Central Asia".Atmospheric Research 236(2020).