Gauging water loss from northern peatlands, a likely accelerant of climate change
- Date:
- May 15, 2020
- Source:
- Marine Biological Laboratory
- Summary:
- Scientists have pooled their data and discovered boreal peatlands lose more water than do forests in response to drying air. This has important implications not only for projections of water availability in the boreal biome but for global carbon-climate feedbacks.
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More carbon is stored in the forests, peatlands, and lakes of the high northern (boreal) latitudes than is currently in the atmosphere. Therefore, understanding how the boreal latitudes, which include Canada and Alaska, respond to global warming is very important for predicting its trajectory. As the climate warms, the air gets drier and can take up more water. The pines, spruces, and larches of boreal forests respond by largely retaining their water, but it hasn't been known how boreal peatlands (bogs and fens) respond.
To compensate, a team of 59 international scientists, including Inke Forbrich of the Marine Biological Laboratory, pooled their data and discovered boreal peatlands lose more water than do forests in response to drying air. This has important implications not only for projections of water availability in these regions but for global carbon-climate feedbacks. With a lower water table, peatlands are more likely to release CO2 to the atmosphere, which in turn would accelerate the pace of global warming.
Most current global climate models assume the boreal region consists only of forest ecosystems. Adding peatlands data will improve their projections. Led by scientists at Canada's McMaster University, the team published their report this week in Nature Climate Change.
Story Source:
Materials provided by Marine Biological Laboratory. Note: Content may be edited for style and length.
Journal Reference:
- Manuel Helbig, James Michael Waddington, Pavel Alekseychik, Brian D. Amiro, Mika Aurela, Alan G. Barr, T. Andrew Black, Peter D. Blanken, Sean K. Carey, Jiquan Chen, Jinshu Chi, Ankur R. Desai, Allison Dunn, Eugenie S. Euskirchen, Lawrence B. Flanagan, Inke Forbrich, Thomas Friborg, Achim Grelle, Silvie Harder, Michal Heliasz, Elyn R. Humphreys, Hiroki Ikawa, Pierre-Erik Isabelle, Hiroki Iwata, Rachhpal Jassal, Mika Korkiakoski, Juliya Kurbatova, Lars Kutzbach, Anders Lindroth, Mikaell Ottosson Löfvenius, Annalea Lohila, Ivan Mammarella, Philip Marsh, Trofim Maximov, Joe R. Melton, Paul A. Moore, Daniel F. Nadeau, Erin M. Nicholls, Mats B. Nilsson, Takeshi Ohta, Matthias Peichl, Richard M. Petrone, Roman Petrov, Anatoly Prokushkin, William L. Quinton, David E. Reed, Nigel T. Roulet, Benjamin R. K. Runkle, Oliver Sonnentag, Ian B. Strachan, Pierre Taillardat, Eeva-Stiina Tuittila, Juha-Pekka Tuovinen, Jessica Turner, Masahito Ueyama, Andrej Varlagin, Martin Wilmking, Steven C. Wofsy, Vyacheslav Zyrianov. Increasing contribution of peatlands to boreal evapotranspiration in a warming climate. Nature Climate Change, 2020; DOI: 10.1038/s41558-020-0763-7
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