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Shallow soils are warmer under trees and tall shrubs across Arctic and Boreal ecosystems

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Shallow soils are warmer under trees and tall shrubs across Arctic and Boreal ecosystems
Other Titles
북극과 boreal 생태계의 수목하에서 토양 천이층이 더 온난함
Kropp, Heather
Loranty, Michael M.
Natali, Susan M.
Kholodov, Alexander L.
Rocha, Adrian, V
Myers-Smith, Isla
Abbot, Benjamin W.
Abermann, Jakob
Blanc-Betes, Elena
Blok, Daan
Blume-Werry, Gesche
Boike, Julia
Breen, Amy L.
Cahoon, Sean M. P.
Christiansen, Casper T.
Douglas, Thomas A.
Epstein, Howard E.
Frost, Gerald V
Goeckede, Mathias
Høye, Toke T.
Mamet, Steven D.
O'Donnell, Jonathan A.
Olefeldt, David
Phoenix, Gareth K.
Salmon, Verity G.
Sannel, A. Britta K.
Smith, Sharon L.
Sonnentag, Oliver
Vaughn, Lydia Smith
Williams, Mathew
Elberling, Bo
Gough, Laura
Hjort, Jan
Lafleur, Peter M.
Euskirchen, Eugenie S.
Heijmans, Monique M. P. D.
Humphreys, Elyn R.
Iwata, Hiroki
Jones, Benjamin M.
Jorgenson, M. Torre
Gruenberg, Inge
Kim, Yongwon
Laundre, James
Mauritz, Marguerite
Michelsen, Anders
Schaepman-Strub, Gabriela
Tape, Ken D.
Ueyama, Masahito
Lee, Bang Yong
Langley, Kirsty
Lund, Magnus
Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
Arctic; boreal forest; soil temperature; vegetation change; permafrost
Issue Date
Kropp, Heather, et al. 2021. "Shallow soils are warmer under trees and tall shrubs across Arctic and Boreal ecosystems". ENVIRONMENTAL RESEARCH LETTERS, 16(1): 1-14.
Soils are warming as air temperatures rise across the Arctic and Boreal region concurrent with the expansion of tall-statured shrubs and trees in the tundra. Changes in vegetation structure and function are expected to alter soil thermal regimes, thereby modifying climate feedbacks related to permafrost thaw and carbon cycling. However, current understanding of vegetation impacts on soil temperature is limited to local or regional scales and lacks the generality necessary to predict soil warming and permafrost stability on a pan-Arctic scale. Here we synthesize shallow soil and air temperature observations with broad spatial and temporal coverage collected across 106 sites representing nine different vegetation types in the permafrost region. We showed ecosystems with tall-statured shrubs and trees (>40 cm) have warmer shallow soils than those with short-statured tundra vegetation when normalized to a constant air temperature. In tree and tall shrub vegetation types, cooler temperatures in the warm season do not lead to cooler mean annual soil temperature indicating that ground thermal regimes in the cold-season rather than the warm-season are most critical for predicting soil warming in ecosystems underlain by permafrost. Our results suggest that the expansion of tall shrubs and trees into tundra regions can amplify shallow soil warming, and could increase the potential for increased seasonal thaw depth and increase soil carbon cycling rates and lead to increased carbon dioxide loss and further permafrost thaw.
Appears in Collections  
2020-2020, Arctic permafrost environment change monitoring and prediction method developments (20-20) / Lee, Bang Yong (PN20081)
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