The biophysical climate mitigation potential of boreal peatlands during the growing season
| Autor: | Mats Nilsson, Alan G. Barr, Mika Aurela, Trofim C. Maximov, Elena D. Lapshina, Jiquan Chen, Hiroki Iwata, Philip Marsh, Masahito Ueyama, Silvie Harder, Christopher Schulze, Elyn Humphreys, Pavel Alekseychik, Martin Wilmking, Brian D. Amiro, Ivan Mammarella, Daniel F. Nadeau, Annalea Lohila, Lawrence B. Flanagan, T. Andrew Black, Juha-Pekka Tuovinen, Hiroki Ikawa, Eugénie S. Euskirchen, Manuel Helbig, Benjamin R. K. Runkle, Achim Grelle, Ankur R. Desai, Ian B. Strachan, Michelle Garneau, Allison L. Dunn, Richard M. Petrone, Eeva-Stiina Tuittila, Pierre-Erik Isabelle, Matthias Peichl, Mika Korkiakoski, Thomas Friborg, Rachhpal S. Jassal, Juliya Kurbatova, Paul A. Moore, Erin M. Nicholls, William L. Quinton, Pierre Taillardat, Anatoly S. Prokushkin, Sean K. Carey, Oliver Sonnentag, Lars Kutzbach, Jinshu Chi, Vyacheslav Zyrianov, Anders Lindroth, Jessica Turner, Michal Heliasz, Timo Vesala, Mikaell Ottosson Löfvenius, James M. Waddington, Takeshi Ohta, Andrej Varlagin, Nigel T. Roulet |
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| Přispěvatelé: | Institute for Atmospheric and Earth System Research (INAR), Micrometeorology and biogeochemical cycles, Biosciences, Viikki Plant Science Centre (ViPS), Ecosystem processes (INAR Forest Sciences) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Peat
010504 meteorology & atmospheric sciences Vapour Pressure Deficit IMPACT STOMATAL CONDUCTANCE Climate change Growing season 010501 environmental sciences Atmospheric sciences 01 natural sciences CARBON boreal forest peatlands 1172 Environmental sciences 0105 earth and related environmental sciences General Environmental Science RESTORATION LAND-COVER CHANGE 4112 Forestry climate mitigation Renewable Energy Sustainability and the Environment SURFACE CONDUCTANCE regional climate Taiga Global warming Public Health Environmental and Occupational Health PERMAFROST THAW NORTH-AMERICA 15. Life on land FOREST Subarctic climate energy balance Boreal 13. Climate action Environmental science ENERGY-BALANCE |
| Zdroj: | Helbig, M, Waddington, J M, Alekseychik, P, Amiro, B, Aurela, M, Barr, A G, Black, T A, Carey, S K, Chen, J, Chi, J, Desai, A R, Dunn, A, Euskirchen, E S, Flanagan, L B, Friborg, T, Garneau, M, Grelle, A, Harder, S, Heliasz, M, Humphreys, E R, Ikawa, H, Isabelle, P, Iwata, H, Jassal, R, Korkiakoski, M, Kurbatova, J, Kutzbach, L, Lapshina, E, Lindroth, A, Löfvenius, M O, Lohila, A, Mammarella, I, Marsh, P, Moore, P A, Maximov, T, Nadeau, D F, Nicholls, E M, Nilsson, M B, Ohta, T, Peichl, M, Petrone, R M, Prokushkin, A, Quinton, W L, Roulet, N, Runkle, B R K, Sonnentag, O, Strachan, I B, Taillardat, P, Tuittila, E, Tuovinen, J, Turner, J, Ueyama, M, Varlagin, A, Vesala, T, Wilmking, M, Zyrianov, V & Schulze, C 2020, ' The biophysical climate mitigation potential of boreal peatlands during the growing season ', Environmental Research Letters, vol. 15, no. 10, 104004 . https://doi.org/10.1088/1748-9326/abab34 |
| Popis: | Peatlands and forests cover large areas of the boreal biome and are critical for global climate regulation. They also regulate regional climate through heat and water vapour exchange with the atmosphere. Understanding how land-atmosphere interactions in peatlands differ from forests may therefore be crucial for modelling boreal climate system dynamics and for assessing climate benefits of peatland conservation and restoration. To assess the biophysical impacts of peatlands and forests on peak growing season air temperature and humidity, we analysed surface energy fluxes and albedo from 35 peatlands and 37 evergreen needleleaf forests-the dominant boreal forest type-and simulated air temperature and vapour pressure deficit (VPD) over hypothetical homogeneous peatland and forest landscapes. We ran an evapotranspiration model using land surface parameters derived from energy flux observations and coupled an analytical solution for the surface energy balance to an atmospheric boundary layer (ABL) model. We found that peatlands, compared to forests, are characterized by higher growing season albedo, lower aerodynamic conductance, and higher surface conductance for an equivalent VPD. This combination of peatland surface properties results in a similar to 20% decrease in afternoon ABL height, a cooling (from 1.7 to 2.5 degrees C) in afternoon air temperatures, and a decrease in afternoon VPD (from 0.4 to 0.7 kPa) for peatland landscapes compared to forest landscapes. These biophysical climate impacts of peatlands are most pronounced at lower latitudes (similar to 45 degrees N) and decrease toward the northern limit of the boreal biome (similar to 70 degrees N). Thus, boreal peatlands have the potential to mitigate the effect of regional climate warming during the growing season. The biophysical climate mitigation potential of peatlands needs to be accounted for when projecting the future climate of the boreal biome, when assessing the climate benefits of conserving pristine boreal peatlands, and when restoring peatlands that have experienced peatland drainage and mining. |
| Databáze: | OpenAIRE |
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