气候变化领域集成服务门户(CCPortal): Spatiotemporal variations of the delta(O-2/N-2), CO2 and delta(APO) in the troposphere over the western North Pacific

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DOI	10.5194/acp-22-6953-2022
	Spatiotemporal variations of the delta(O-2/N-2), CO2 and delta(APO) in the troposphere over the western North Pacific
	Ishidoya, Shigeyuki; Tsuboi, Kazuhiro; Niwa, Yosuke; Matsueda, Hidekazu; Murayama, Shohei; Ishijima, Kentaro; Saito, Kazuyuki
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	6953
结束页码	6970
卷号	22 期号:10 页码:18
英文摘要	We analyzed air samples collected on board a C-130 cargo aircraft over the western North Pacific from May 2012 to March 2020 for atmospheric delta(O-2/N-2) and CO2 amount fraction. Observations were corrected for significant artificial fractionation of O-2 and N-2 caused by thermal diffusion during the air sample collection using the simultaneously measured delta(Ar/N-2). The observed seasonal cycles of the delta(O-2/N-2) and atmospheric potential oxygen (delta(APO)) varied nearly in opposite phase to the cycle of the CO2 amount fraction at all latitudes and altitudes. Seasonal amplitudes of delta(APO) decreased with latitude from 34 to 25 degrees N, as well as with increasing altitude from the surface to 6 km by 50 %-70 %, while those of the CO2 amount fraction decreased by less than 20 %. By comparing the observed values with the simulated delta(APO) and CO2 amount fraction values generated by an atmospheric transport model, we found that the seasonal delta(APO) cycle in the middle troposphere was modified significantly by a combination of the northern and southern hemispheric seasonal cycles due to the interhemispheric mixing of air. The simulated delta(APO) underestimated the observed interannual variation in delta(APO) significantly, probably due to the interannual variation in the annual mean air-sea O-2 flux. Interannual variation in delta(APO) driven by the net marine biological activities, obtained by subtracting the assumed solubility-driven component of delta(APO) from the total variation, indicated a clear influence on annual net sea-air marine biological O-2 flux during El Nino and net air-sea flux during La Nina. By analyzing the observed secular trends of delta(O-2/N-2) and the CO2 amount fraction, global average terrestrial biospheric and oceanic CO2 uptakes for the period 2012-2019 were estimated to be (1.8 +/- 0.9) and (2.8 +/- 0.6) Pg a(-1) (C equivalents), respectively.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000803026300001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273781
作者单位	National Institute of Advanced Industrial Science & Technology (AIST); Meteorological Research Institute - Japan; National Institute for Environmental Studies - Japan; Japan Meteorological Agency
推荐引用方式 GB/T 7714	Ishidoya, Shigeyuki,Tsuboi, Kazuhiro,Niwa, Yosuke,et al. Spatiotemporal variations of the delta(O-2/N-2), CO2 and delta(APO) in the troposphere over the western North Pacific[J],2022,22(10):18.
APA	Ishidoya, Shigeyuki.,Tsuboi, Kazuhiro.,Niwa, Yosuke.,Matsueda, Hidekazu.,Murayama, Shohei.,...&Saito, Kazuyuki.(2022).Spatiotemporal variations of the delta(O-2/N-2), CO2 and delta(APO) in the troposphere over the western North Pacific.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(10),18.
MLA	Ishidoya, Shigeyuki,et al."Spatiotemporal variations of the delta(O-2/N-2), CO2 and delta(APO) in the troposphere over the western North Pacific".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.10(2022):18.