Arid
DOI10.3390/soilsystems3010010
Reconciling Negative Soil CO2 Fluxes: Insights from a Large-Scale Experimental Hillslope
Cueva, Alejandro; Volkmann, Till H. M.; van Haren, Joost; Troch, Peter A.; Meredith, Laura K.
通讯作者Cueva, A
来源期刊SOIL SYSTEMS
EISSN2571-8789
出版年2019
卷号3期号:1
英文摘要Soil fluxes of CO2 (F-s) have long been considered unidirectional, reflecting the predominant roles of metabolic activity by microbes and roots in ecosystem carbon cycling. Nonetheless, there is a growing body of evidence that non-biological processes in soils can outcompete biological ones, pivoting soils from a net source to sink of CO2, as evident mainly in hot and cold deserts with alkaline soils. Widespread reporting of unidirectional fluxes may lead to misrepresentation of F-s in process-based models and lead to errors in estimates of local to global carbon balances. In this study, we investigate the variability and environmental controls of F-s in a large-scale, vegetation-free, and highly instrumented hillslope located within the Biosphere 2 facility, where the main carbon sink is driven by carbonate weathering. We found that the hillslope soils were persistent sinks of CO2 comparable to natural desert shrublands, with an average rate of -0.15 +/- 0.06 mu mol CO2 m(2) s(-1) and annual sink of -56.8 +/- 22.7 g C m(-2) y(-1). Furthermore, higher uptake rates (more negative F-s) were observed at night, coinciding with strong soil-air temperature gradients and [CO2] inversions in the soil profile, consistent with carbonate weathering. Our results confirm previous studies that reported negative values of F-s in hot and cold deserts around the globe and suggest that negative F-s are more common than previously assumed. This is particularly important as negative F-s may occur widely in arid and semiarid ecosystems, which play a dominant role in the interannual variability of the terrestrial carbon cycle. This study contributes to the growing recognition of the prevalence of negative F-s as an important yet, often overlooked component of ecosystem C cycling.
英文关键词net soil exchange biosphere 2 carbonate weathering negative emission technology microbial induced carbonate precipitation
类型Article
语种英语
开放获取类型DOAJ Gold, Green Published
收录类别ESCI
WOS记录号WOS:000500757400009
WOS关键词CARBON-DIOXIDE EMISSIONS ; NET ECOSYSTEM EXCHANGE ; EDDY COVARIANCE ; HETEROTROPHIC RESPIRATION ; TEMPERATURE-DEPENDENCE ; INTERANNUAL VARIABILITY ; SEMIARID ECOSYSTEMS ; WEATHERING RATE ; RAIN PULSES ; EFFLUX
WOS类目Soil Science
WOS研究方向Agriculture
来源机构University of Arizona
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/333967
作者单位[Cueva, Alejandro; Volkmann, Till H. M.; van Haren, Joost; Troch, Peter A.; Meredith, Laura K.] Univ Arizona, Biosphere 2, Tucson, AZ 85623 USA; [van Haren, Joost] Univ Arizona, Honors Coll, Tucson, AZ 85721 USA; [Troch, Peter A.] Univ Arizona, Dept Hydrol & Atmospher Sci, Tucson, AZ 85721 USA; [Meredith, Laura K.] Univ Arizona, Sch Nat Resources & Environm, Tucson, AZ 85721 USA
推荐引用方式
GB/T 7714
Cueva, Alejandro,Volkmann, Till H. M.,van Haren, Joost,et al. Reconciling Negative Soil CO2 Fluxes: Insights from a Large-Scale Experimental Hillslope[J]. University of Arizona,2019,3(1).
APA Cueva, Alejandro,Volkmann, Till H. M.,van Haren, Joost,Troch, Peter A.,&Meredith, Laura K..(2019).Reconciling Negative Soil CO2 Fluxes: Insights from a Large-Scale Experimental Hillslope.SOIL SYSTEMS,3(1).
MLA Cueva, Alejandro,et al."Reconciling Negative Soil CO2 Fluxes: Insights from a Large-Scale Experimental Hillslope".SOIL SYSTEMS 3.1(2019).
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Cueva, Alejandro]的文章
[Volkmann, Till H. M.]的文章
[van Haren, Joost]的文章
百度学术
百度学术中相似的文章
[Cueva, Alejandro]的文章
[Volkmann, Till H. M.]的文章
[van Haren, Joost]的文章
必应学术
必应学术中相似的文章
[Cueva, Alejandro]的文章
[Volkmann, Till H. M.]的文章
[van Haren, Joost]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。