Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/aad5ef |
Detecting drought impact on terrestrial biosphere carbon fluxes over contiguous US with satellite observations | |
Liu, Junjie1; Bowman, Kevin1; Parazoo, Nicholas C.1; Bloom, A. Anthony1; Wunch, Debra2; Jiang, Zhe3; Gurney, Kevin R.4; Schimel, Dave1 | |
2018-09-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2018 |
卷号 | 13期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Canada; Peoples R China |
英文摘要 | With projections of increasing drought in the future, understanding how the natural carbon cycle responds to drought events is needed to predict the fate of the land carbon sink and future atmospheric CO2 concentrations and climate. We quantified the impacts of the 2011 and 2012 droughts on terrestrial ecosystem carbon uptake anomalies over the contiguous US (CONUS) relative to non-drought years during 2010-2015 using satellite observations and the carbon monitoring system-flux inversion modeling framework. Soilmoisture and temperature anomalies are good predictors of gross primary production anomalies (R-2 > 0.6) in summer but less so for net biosphere production (NBP) anomalies, reflecting different respiration responses. We showed that regional responses combine in complicated ways to produce the observed CONUS responses. Because of the compensating effect of the carbonflux anomalies between northern and southern CONUS in 2011 and between spring and summer in 2012, the annual NBP decreased by 0.10 +/- 0.16 GtC in 2011, and increased by 0.10 +/- 0.16 GtC in 2012 over CONUS, consistent with previous reported results. Over the 2011 and 2012 drought-impacted regions, the reductions in NBP were similar to 40% of the regional annual fossil fuel emissions, underscoring the importance of quantifying natural carbon flux variability as part of an overall observing strategy. The NBP reductions over the 2011 and 2012 CONUS drought-impacted region were opposite to the global atmospheric CO2 growth rate anomaly, implying that global atmospheric CO2 growth rate is an offsetting effect between enhanced uptake and emission, and enhancing the understanding of regional carbon-cycle climate relationship is necessary to improve the projections of future climate. |
英文关键词 | 2011 and 2012 North American drought terrestrial biosphere carbon response GOSAT column CO2 solar induced chlorophyll fluorescence |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000443764800002 |
WOS关键词 | INDUCED CHLOROPHYLL FLUORESCENCE ; ATMOSPHERIC CO2 ; PHOTOSYNTHESIS ; SENSITIVITY ; EMISSIONS ; EXCHANGE ; SAVANNA ; FOREST ; WATER ; 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/33201 |
专题 | 气候变化 |
作者单位 | 1.CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA; 2.Univ Toronto, Toronto, ON, Canada; 3.Univ Sci & Technol China, Hefei, Anhui, Peoples R China; 4.Arizona State Univ, Tempe, AZ 85287 USA |
推荐引用方式 GB/T 7714 | Liu, Junjie,Bowman, Kevin,Parazoo, Nicholas C.,et al. Detecting drought impact on terrestrial biosphere carbon fluxes over contiguous US with satellite observations[J]. ENVIRONMENTAL RESEARCH LETTERS,2018,13(9). |
APA | Liu, Junjie.,Bowman, Kevin.,Parazoo, Nicholas C..,Bloom, A. Anthony.,Wunch, Debra.,...&Schimel, Dave.(2018).Detecting drought impact on terrestrial biosphere carbon fluxes over contiguous US with satellite observations.ENVIRONMENTAL RESEARCH LETTERS,13(9). |
MLA | Liu, Junjie,et al."Detecting drought impact on terrestrial biosphere carbon fluxes over contiguous US with satellite observations".ENVIRONMENTAL RESEARCH LETTERS 13.9(2018). |
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