Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/aac83e |
Biogeophysical controls on soil-atmosphere thermal differences: implications on warming Arctic ecosystems | |
Aalto, J.1,2; Scherrer, D.3; Lenoir, J.4; Guisan, A.3,5; Luoto, M.1 | |
2018-07-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS
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ISSN | 1748-9326 |
出版年 | 2018 |
卷号 | 13期号:7 |
文章类型 | Article |
语种 | 英语 |
国家 | Finland; Switzerland; France |
英文摘要 | Soil temperature (ST) has a key role in Arctic ecosystem functioning and global environmental change. However, soil thermal conditions do not necessarily follow synoptic temperature variations. This is because local biogeophysical processes can lead to a pronounced soil-atmosphere thermal offset (Delta T) while altering the coupling (beta Tau) between ST and ambient air temperature (AAT). Here, we aim to uncover the spatiotemporal variation in these parameters and identify their main environmental drivers. By deploying a unique network of 322 temperature loggers and surveying biogeophysical processes across an Arctic landscape, we found that the spatial variation in Delta T during the AAT <= 0 period (mean Delta T = 6.0 degrees C, standard deviation +/- 1.2 degrees C) was directly and indirectly constrained by local topography controlling snow depth. By contrast, during the AAT>0 period, Delta T was controlled by soil characteristics, vegetation and solar radiation (Delta T = -0.6 degrees C +/- 1.0 degrees C). Importantly, Delta T was not constant throughout the seasons reflecting the influence of beta Tau on the rate of local soil warming being stronger after (mean beta Tau = 0.8 +/- 0.1) than before (beta Tau = 0.2 +/- 0.2) snowmelt. Our results highlight the need for continuous microclimatic and local environmental monitoring, and suggest a potential for large buffering and non-uniform warming of snow-dominated Arctic ecosystems under projected temperature increase. |
英文关键词 | thermal variability microclimate soil-atmosphere decoupling soil temperature structural equation model snow cover offset |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000436603900001 |
WOS关键词 | CLIMATE ; PLANT ; TEMPERATURES ; MOISTURE ; AIR ; MICROREFUGIA ; COMMUNITIES ; CHALLENGES ; VEGETATION ; FEEDBACKS |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/14917 |
专题 | 气候变化 |
作者单位 | 1.Univ Helsinki, Dept Geosci & Geog, POB 64,Gustaf Hallstromin Katu 2a, FIN-00014 Helsinki, Finland; 2.Finnish Meteorol Inst, POB 503, FI-00101 Helsinki, Finland; 3.Univ Lausanne, Dept Ecol & Evolut, CH-1015 Lausanne, Switzerland; 4.Univ Picardie JulesVerne, CNRS, UMR 7058, UR Ecol & Dynam Syst Anthropises EDYSAN, 1 Rue Louvels, FR-80000 Amiens, France; 5.Univ Lausanne, Inst Earth Surface Dynam, CH-1015 Lausanne, Switzerland |
推荐引用方式 GB/T 7714 | Aalto, J.,Scherrer, D.,Lenoir, J.,et al. Biogeophysical controls on soil-atmosphere thermal differences: implications on warming Arctic ecosystems[J]. ENVIRONMENTAL RESEARCH LETTERS,2018,13(7). |
APA | Aalto, J.,Scherrer, D.,Lenoir, J.,Guisan, A.,&Luoto, M..(2018).Biogeophysical controls on soil-atmosphere thermal differences: implications on warming Arctic ecosystems.ENVIRONMENTAL RESEARCH LETTERS,13(7). |
MLA | Aalto, J.,et al."Biogeophysical controls on soil-atmosphere thermal differences: implications on warming Arctic ecosystems".ENVIRONMENTAL RESEARCH LETTERS 13.7(2018). |
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