Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/ab6784 |
Evaluation of simulated soil carbon dynamics in Arctic-Boreal ecosystems | |
Huntzinger, D. N.1; Schaefer, K.2; Schwalm, C.3,4; Fisher, J. B.5; Hayes, D.6; Stofferahn, E.5; Carey, J.7; Michalak, A. M.8; Wei, Y.9,10; Jain, A. K.11; Kolus, H.1; Mao, J.9,10; Poulter, B.12; Shi, X.9,10; Tang, J.13; Tian, H.14 | |
2020-02-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2020 |
卷号 | 15期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Given the magnitude of soil carbon stocks in northern ecosystems, and the vulnerability of these stocks to climate warming, land surface models must accurately represent soil carbon dynamics in these regions. We evaluate soil carbon stocks and turnover rates, and the relationship between soil carbon loss with soil temperature and moisture, from an ensemble of eleven global land surface models. We focus on the region of NASA's Arctic-Boreal vulnerability experiment (ABoVE) in North America to inform data collection and model development efforts. Models exhibit an order of magnitude difference in estimates of current total soil carbon stocks, generally under- or overestimating the size of current soil carbon stocks by greater than 50 PgC. We find that a model's soil carbon stock at steady-state in 1901 is the prime driver of its soil carbon stock a hundred years later-overwhelming the effect of environmental forcing factors like climate. The greatest divergence between modeled and observed soil carbon stocks is in regions dominated by peat and permafrost soils, suggesting that models are failing to capture the frozen soil carbon dynamics of permafrost regions. Using a set of functional benchmarks to test the simulated relationship of soil respiration to both soil temperature and moisture, we find that although models capture the observed shape of the soil moisture response of respiration, almost half of the models examined show temperature sensitivities, or Q10 values, that are half of observed. Significantly, models that perform better against observational constraints of respiration or carbon stock size do not necessarily perform well in terms of their functional response to key climatic factors like changing temperature. This suggests that models may be arriving at the right result, but for the wrong reason. The results of this work can help to bridge the gap between data and models by both pointing to the need to constrain initial carbon pool sizes, as well as highlighting the importance of incorporating functional benchmarks into ongoing, mechanistic modeling activities such as those included in ABoVE. |
英文关键词 | soil carbon Arctic-Boreal terrestrial carbon cycle soil respiration functional benchmark |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000522237300002 |
WOS关键词 | MODEL INTERCOMPARISON PROJECT ; PROGRAM MULTISCALE SYNTHESIS ; NET PRIMARY PRODUCTION ; PERMAFROST CARBON ; GLOBAL PATTERNS ; CLIMATE-CHANGE ; RESPIRATION ; STORAGE ; TUNDRA ; CYCLE |
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/279178 |
专题 | 气候变化 |
作者单位 | 1.No Arizona Univ, Sch Earth & Sustainabil, POB 5694, Flagstaff, AZ 86011 USA; 2.Univ Colorado, Natl Snow & Ice Data Ctr, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; 3.Woods Hole Res Ctr, POB 296, Woods Hole, MA 02543 USA; 4.No Arizona Univ, Ctr Ecosyst & Soc, Flagstaff, AZ 86011 USA; 5.CALTECH, Jet Prop Lab, Pasadena, CA USA; 6.Univ Maine, Sch Forest Resources, Orono, ME USA; 7.Babson Coll, Math & Sci, Babson Pk, MA 02157 USA; 8.Carnegie Inst Sci, Dept Global Ecol, Stanford, CA USA; 9.Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA; 10.Oak Ridge Natl Lab, Climate Change Sci Inst, Oak Ridge, TN 37831 USA; 11.Univ Illinois, Dept Atmospher Sci, Urbana, IL 61801 USA; 12.NASA, Biospher Sci Lab, Greenbelt, MD USA; 13.Marine Biol Lab, Woods Hole, MA 02543 USA; 14.Auburn Univ, Sch Forestry & Wildlife Sci, Auburn, AL 36849 USA |
推荐引用方式 GB/T 7714 | Huntzinger, D. N.,Schaefer, K.,Schwalm, C.,et al. Evaluation of simulated soil carbon dynamics in Arctic-Boreal ecosystems[J]. ENVIRONMENTAL RESEARCH LETTERS,2020,15(2). |
APA | Huntzinger, D. N..,Schaefer, K..,Schwalm, C..,Fisher, J. B..,Hayes, D..,...&Tian, H..(2020).Evaluation of simulated soil carbon dynamics in Arctic-Boreal ecosystems.ENVIRONMENTAL RESEARCH LETTERS,15(2). |
MLA | Huntzinger, D. N.,et al."Evaluation of simulated soil carbon dynamics in Arctic-Boreal ecosystems".ENVIRONMENTAL RESEARCH LETTERS 15.2(2020). |
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