干旱区生态环境知识资源中心(Arid): Global Snow Seasonality Regimes from Satellite Records of Snow Cover

Arid

DOI	10.1175/JHM-D-23-0047.1
	Global Snow Seasonality Regimes from Satellite Records of Snow Cover
	Johnston, Jeremy; Jacobs, Jennifer M.; Cho, Eunsang
通讯作者	Johnston, J
来源期刊	JOURNAL OF HYDROMETEOROLOGY
ISSN	1525-755X
EISSN	1525-7541
出版年	2024
卷号	25 期号:1 页码:65-88
英文摘要	Snow cover provides distinct seasonal controls on the exchange of energy between Earth's surface and atmosphere, and on hydrologic cycling, and holds considerable importance to communities and ecosystems worldwide. In this work, we tackle a comprehensive review of existing snow classification approaches and the development of new glob-ally applicable snow cover-based rules for delineating snow seasonality classes. Snow classification rules are defined using machine learning approaches, which are then applied to the 22-yr record of snow cover (2000-22) from the Moderate Res-olution Imaging Spectroradiometer (MODIS) on a 0.018 global grid. For the MODIS period of record, we find the global land surface can be effectively partitioned into five snow seasonality classes: no snow, ephemeral, transitional, seasonal, and perennial snow regimes which on average cover extents of approximately 76 (52% of global land areas), 19 (13%), 16 (11%), 18 (13%), and 16 million km2 (11%), respectively. Using the multidecadal dataset, we explore changes within snow regimes and find significant increases in the areal extent of no snow (approximately 170000 km2 yr-1) as well as apparent losses in perennial (-3600 km2 yr-1) and seasonal snow regime coverage (-38000 km2 yr-1). The resulting classification maps have strong agreement with in situ snow depth observations and present similar patterns to existing snow and climate classifications with notable discrepancies in cold arid regions. The framework's ability to accurately capture variations in snow persistence, snow accumulation, and melt cycling is shown, providing a reference to the current state of global snow seasonality.
英文关键词	Snow cover Climate classification/regimes Remote sensing Classification Multidecadal variability Trends
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001131597600001
WOS关键词	WESTERN UNITED-STATES ; CLIMATE ; RUNOFF ; MODIS ; SURFACE ; SYSTEM ; TRENDS ; ICE ; PRODUCTS ; MOMENTUM
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404634
推荐引用方式 GB/T 7714	Johnston, Jeremy,Jacobs, Jennifer M.,Cho, Eunsang. Global Snow Seasonality Regimes from Satellite Records of Snow Cover[J],2024,25(1):65-88.
APA	Johnston, Jeremy,Jacobs, Jennifer M.,&Cho, Eunsang.(2024).Global Snow Seasonality Regimes from Satellite Records of Snow Cover.JOURNAL OF HYDROMETEOROLOGY,25(1),65-88.
MLA	Johnston, Jeremy,et al."Global Snow Seasonality Regimes from Satellite Records of Snow Cover".JOURNAL OF HYDROMETEOROLOGY 25.1(2024):65-88.