干旱区生态环境知识资源中心(Arid): Ecosystem CO2 release driven by wind occurs in drylands at global scale

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DOI	10.1111/gcb.16277
	Ecosystem CO2 release driven by wind occurs in drylands at global scale
	Rosario Moya, Maria; Lopez-Ballesteros, Ana; Sanchez-Canete, Enrique P.; Serrano-Ortiz, Penelope; Oyonarte, Cecilio; Domingo, Francisco; Kowalski, Andrew S.
通讯作者	Moya, MR
来源期刊	GLOBAL CHANGE BIOLOGY
ISSN	1354-1013
EISSN	1365-2486
出版年	2022
卷号	28 期号:17 页码:5320-5333
英文摘要	Subterranean ventilation is a non-diffusive transport process that provokes the abrupt transfer of CO2-rich air (previously stored) through water-free soil pores and cracks from the vadose zone to the atmosphere, under high-turbulence conditions. In dryland ecosystems, whose biological carbon exchanges are poorly characterized, it can strongly determine eddy-covariance CO2 fluxes that are used to validate remote sensing products and constrain models of gross primary productivity. Although subterranean ventilation episodes (VE) may occur in arid and semi-arid regions, which are unsung players in the global carbon cycle, little research has focused on the role of VE CO2 emissions in land-atmosphere CO2 exchange. This study shows clear empirical evidence of globally occurring VE. To identify VE, we used in situ quality-controlled eddy-covariance open data of carbon fluxes and ancillary variables from 145 sites in different open land covers (grassland, cropland, shrubland, savanna, and barren) across the globe. We selected the analyzed database from the FLUXNET2015, AmeriFlux, OzFlux, and AsiaFlux networks. To standardize the analysis, we designed an algorithm to detect CO2 emissions produced by VE at all sites considered in this study. Its main requirement is the presence of considerable and non-spurious correlation between the friction velocity (i.e., turbulence) and CO2 emissions. Of the sites analyzed, 34% exhibited the occurrence of VE. This vented CO2 emerged mainly from arid ecosystems (84%) and sites with hot and dry periods. Despite some limitations in data availability, this research demonstrates that VE-driven CO2 emissions occur globally. Future research should seek a better understanding of its drivers and the improvement of partitioning models, to reduce uncertainties in estimated biological CO2 exchanges and infer their contribution to the global net ecosystem carbon balance.
英文关键词	drylands eddy covariance FLUXNET global carbon cycle ventilation
类型	Article
语种	英语
开放获取类型	Green Published, hybrid
收录类别	SCI-E
WOS记录号	WOS:000813817200001
WOS关键词	PLANT LITTER DECOMPOSITION ; CARBON-DIOXIDE EXCHANGE ; WATER-VAPOR ADSORPTION ; MEDITERRANEAN ECOSYSTEMS ; INTERANNUAL VARIABILITY ; SUBTERRANEAN VENTILATION ; PRECIPITATION PULSES ; SEMIARID ECOSYSTEMS ; PRESSURE CHANGES ; SOIL
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392968
推荐引用方式 GB/T 7714	Rosario Moya, Maria,Lopez-Ballesteros, Ana,Sanchez-Canete, Enrique P.,et al. Ecosystem CO2 release driven by wind occurs in drylands at global scale[J],2022,28(17):5320-5333.
APA	Rosario Moya, Maria.,Lopez-Ballesteros, Ana.,Sanchez-Canete, Enrique P..,Serrano-Ortiz, Penelope.,Oyonarte, Cecilio.,...&Kowalski, Andrew S..(2022).Ecosystem CO2 release driven by wind occurs in drylands at global scale.GLOBAL CHANGE BIOLOGY,28(17),5320-5333.
MLA	Rosario Moya, Maria,et al."Ecosystem CO2 release driven by wind occurs in drylands at global scale".GLOBAL CHANGE BIOLOGY 28.17(2022):5320-5333.