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Winter inverse lake stratification under historic and future climate change

Journal Article · · Limnology and Oceanography Letters
DOI:https://doi.org/10.1002/lol2.10231· OSTI ID:1988255
Millions of lakes inversely stratify during winter. Seemingly subtle variations in the duration of winter stratification can have major ecological effects by, for example, altering the vertical distribution of oxygen and nutrients in lakes. Yet, the influence of climate change on winter stratification has been largely unexplored. To fill this knowledge gap, here we used a lake-climate model ensemble to investigate changes in winter stratification from 1901 to 2099 across 12,242 representative lakes situated throughout the Northern Hemisphere. By the end of the 21st century, winter stratification duration is projected to shorten by an average of 18.5–53.9 d under Representative Concentration Pathways (RCPs) 2.6–8.5. Projected changes are faster in warmer geographical regions, in which 35–69% of lakes will no longer inversely stratify by 2070–2099 under RCPs 2.6–8.5. This shortening and loss of winter stratification will likely have numerous implications for lakes, including the misalignment of lifecycle events causing shifts in biodiversity.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
Natural Environment Research Council (NERC); Swedish Infrastructure for Ecosystem Science (SITES); Swedish Research Council (VR); USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1988255
Report Number(s):
PNNL-SA-167310
Journal Information:
Limnology and Oceanography Letters, Journal Name: Limnology and Oceanography Letters Journal Issue: 4 Vol. 7; ISSN 2378-2242
Publisher:
Association for the Sciences of Limnology and OceanographyCopyright Statement
Country of Publication:
United States
Language:
English

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