气候变化领域集成服务门户(CCPortal): The state and fate of lake ice thickness in the Northern Hemisphere

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DOI	10.1016/j.scib.2021.10.015
	The state and fate of lake ice thickness in the Northern Hemisphere
	Li X.; Long D.; Huang Q.; Zhao F.
发表日期	2021
英文摘要	Lake ice thickness (LIT) is important for regional hydroclimate systems, lake ecosystems, and human activities on the ice, and is thought to be highly susceptible to global warming. However, the spatiotemporal variability in LIT is largely unknown due to the difficulty in deriving in situ measurements and the lack of an effective remote sensing platform. Despite intensive development and applications of lake ice models driven by general circulation model output, evaluation of the global LIT is mostly based on assumed “ideal” lakes in each grid cell of the climate forcing data. A method for calculating the actual global LIT is therefore urgently needed. Here we use satellite altimetry to retrieve ice thickness for 16 large lakes in the Northern Hemisphere (Lake Baikal, Great Slave Lake, and others) with an accuracy of ∼0.2 m for almost three decades. We then develop a 1-D lake ice model driven primarily by remotely sensed data and cross-validated with the altimetric LIT to provide a robust means of estimating LIT for lakes larger than 50 km2 across the Northern Hemisphere. Mean LIT (annual maximum ice thickness) for 1313 simulated lakes and reservoirs covering ∼840,000 km2 for 2003–2018 is 0.63 ± 0.02 m, corresponding to ∼485 Gt of water. LIT changes are projected for 2071–2099 under RCPs 2.6, 6.0, and 8.5, showing that the mean LIT could decrease by ∼0.35 m under the worst concentration pathway and the associated lower ice road availability could have a significant impact on socio-economic activities. © 2021 Science China Press
英文关键词	Climate change; Lake ice modeling; Lake ice thickness; Northern Hemisphere; Satellite altimetry
语种	英语
scopus关键词	Aneroid altimeters; Climate models; Ecosystems; Global warming; Ice; Remote sensing; Reservoirs (water); Satellites; Human activities; Hydroclimates; Ice thickness; In-situ measurement; Lake ice thickness; Lake-ice models; Model-driven; Northern Hemispheres; Remote sensing platforms; Spatiotemporal variability; Lakes
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/251220
作者单位	State Key Laboratory of Hydroscience and Engineering, Department of Hydraulic Engineering, Tsinghua University, Beijing, 100084, China
推荐引用方式 GB/T 7714	Li X.,Long D.,Huang Q.,et al. The state and fate of lake ice thickness in the Northern Hemisphere[J],2021.
APA	Li X.,Long D.,Huang Q.,&Zhao F..(2021).The state and fate of lake ice thickness in the Northern Hemisphere.Science Bulletin.
MLA	Li X.,et al."The state and fate of lake ice thickness in the Northern Hemisphere".Science Bulletin (2021).