High-Resolution Mapping of Ice Cover Changes in Over 33,000 Lakes Across the North Temperate Zone

Summary, in English

More than 50% of global lakes periodically freeze, and their lake ice phenology is sensitive to climate change. However, spatially detailed quantification of the changes in lake ice at the global scale is not available. Here, we map ice cover in >33,000 lakes throughout the North Temperate Zone (23.5°–66.5°N) using 0.55 million Landsat images from 1985 to 2020. Over this period, we found a remarkable reduction in median ice cover occurrence (ICO) (61% to 43%), which was strongly related to warming terrestrial mean surface temperatures (R² = 0.94, p < 0.05). Lakes in Europe showed the most pronounced ice loss (median ICO decreased from 50% to 24%), and extensive lake ice losses were also detected in the northern US, and central and eastern Asia. An overall increase in ice cover was identified from P2 (1999–2006) to P3 (2007–2014) due to regional decreased temperatures associated with the “global warming hiatus.” Thehigh-resolution mapping of lake ice here provides essentialbaseline information whichcan be used to elucidate ice loss-induced environmental and societal impacts.

• Author: Xinchi Wang; Lian Feng; Luke Gibson; Wei Qi; Junguo Liu; Yi Zheng; Jing Tang; Zhenzhong Zeng; Chunmiao Zheng
• Department/s: Dept of Physical Geography and Ecosystem Science; MERGE: ModElling the Regional and Global Earth system
• Publishing year: 2021-09-28
• Language: English
• Publication/Series: Geophysical Research Letters
• Volume: 48
• Issue: 18
• Links: http://dx.doi.org/10.1029/2021GL095614
• Document type: Journal article
• Publisher: American Geophysical Union (AGU)
• Topic: Climate Research
• Keywords: climate change; global warming; lake ice; North Temperate Zone; remote sensing
• Status: Published
• ISBN/ISSN/Other: ISSN: 0094-8276