Quantifying soil-respired CO2 on the Chinese Loess Plateau

doi:10.1016/j.palaeo.2020.110158

IEECAS OpenIR > 古环境研究室

	Quantifying soil-respired CO2 on the Chinese Loess Plateau
	Ji, Shunchuan 1; Ma, Long 2,3; Nie, Junsheng 4; Chen, Shengyun 5; Sun, Youbin 1; Breecker, Daniel O.6
通讯作者	Ji, Shunchuan(shunchuanji@sina.com)
	2021-01-15
发表期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
卷号	562 页码:8
摘要	Soil respiration is one of the dominant fluxes of CO2 from terrestrial ecosystems to the atmosphere. Accurate quantification of soil respiration is essential for robust projection of future climate variation and for reliable estimation of paleoatmospheric CO2 levels using soil carbonates. Soil-respired CO2, which is the most uncertain factor in estimating atmospheric CO2 concentration, has been calculated from modern observations of surface soils and from proxy indicators of paleosols formed during time periods of known atmospheric CO2. However, these estimations provide a wide range of S(z) values from past to present. To directly compare modern observation with past estimation, here we first monitored soil CO2 profiles in a Holocene profile on the western Chinese Loess Plateau (CLP) for two years, providing direct measurements of soil-respired (CO2 )at the depth where carbonate nodules likely formed. We then collected carbonate nodules below last interglacial paleosol (S1) from two N-S-aligned transects across the CLP to back-calculate soil-respired CO2. The mean back-calculated S(z) from S1 carbonate nodules vary from 539 +/- 87 ppm to 848 +/- 170 ppm in the sections on the northwestern and southeastern CLP, respectively. The mean value of directly measured soil-respired CO2 on the western CLP is 572 + 273 ppm before the onset of summer monsoon, consistent with the back-calculated S(z) in northwestern sections. Our results suggest that spatial S(z) variations are mainly controlled by monsoonal precipitation during the summer season on the CLP. To better constrain the high end of S(z), more monitoring work is needed in higher precipitation areas on the southeastern CLP.
关键词	Chinese Loess Plateau S(z) Monitoring soil respiration Last interglacial paleosol (S1)
DOI	10.1016/j.palaeo.2020.110158
关键词[WOS]	CLUMPED ISOTOPE GEOTHERMOMETER ; PEDOGENIC CARBONATE ; ORGANIC-CARBON ; SEASONAL BIAS ; RECORD ; PRECIPITATION ; CONSTRAINTS ; TEMPERATURE ; ABUNDANCE ; DIOXIDE
收录类别	SCI ; SCI
语种	英语
WOS研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:000604584600068
出版者	ELSEVIER
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/15895
专题	古环境研究室
通讯作者	Ji, Shunchuan
作者单位	1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 2.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China 3.Northwest Univ, Dept Geol, Shaanxi Key Lab Early Life & Environm, Xian 710069, Peoples R China 4.Lanzhou Univ, Coll Earth Environm Sci, MOE Key Lab Western Chinas Environm Syst, Lanzhou 730000, Gansu, Peoples R China 5.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China 6.Univ Texas Austin, Dept Geol Sci, Austin, TX 78712 USA
推荐引用方式 GB/T 7714	Ji, Shunchuan,Ma, Long,Nie, Junsheng,et al. Quantifying soil-respired CO2 on the Chinese Loess Plateau[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2021,562:8.
APA	Ji, Shunchuan,Ma, Long,Nie, Junsheng,Chen, Shengyun,Sun, Youbin,&Breecker, Daniel O..(2021).Quantifying soil-respired CO2 on the Chinese Loess Plateau.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,562,8.
MLA	Ji, Shunchuan,et al."Quantifying soil-respired CO2 on the Chinese Loess Plateau".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 562(2021):8.