Earlier ice loss accelerates lake warming in the Northern Hemisphere

Xinyu Li, Shushi Peng (), Yi Xi, R. Iestyn Woolway and Gang Liu
Additional contact information
Xinyu Li: Peking University
Shushi Peng: Peking University
Yi Xi: Peking University
R. Iestyn Woolway: Bangor University, Menai Bridge
Gang Liu: Peking University

Nature Communications, 2022, vol. 13, issue 1, 1-9

Abstract: Abstract How lake temperatures across large geographic regions are responding to widespread alterations in ice phenology (i.e., the timing of seasonal ice formation and loss) remains unclear. Here, we analyse satellite data and global-scale simulations to investigate the contribution of long-term variations in the seasonality of lake ice to surface water temperature trends across the Northern Hemisphere. Our analysis suggests a widespread excess lake surface warming during the months of ice-off which is, on average, 1.4 times that calculated during the open-water season. This excess warming is influenced predominantly by an 8-day advancement in the average timing of ice break-up from 1979 to 2020. Until the permanent loss of lake ice in the future, excess lake warming may be further amplified due to projected future alterations in lake ice phenology. Excess lake warming will likely alter within-lake physical and biogeochemical processes with numerous implications for lake ecosystems.

Date: 2022
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DOI: 10.1038/s41467-022-32830-y

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