Factors contributing to spatial–temporal variations of observed oxygen concentration over the Qinghai-Tibetan Plateau

Abstract Oxygen (O2) is the most abundant molecule in the atmosphere after nitrogen. Previous studies have documented that oxygen concentration remains nearly constant (20.946%) at all altitudes. Here we show for the first time that oxygen concentration varies significantly from earlier consensus an...

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Autores principales:	Peijun Shi, Yanqiang Chen, Gangfeng Zhang, Haiping Tang, Zhi Chen, Deyong Yu, Jing Yang, Tao Ye, Jing’ai Wang, Shunlin Liang, Yonggui Ma, Jidong Wu, Peng Gong
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/bbcc79b224174a45b7fe0b6a5f3dccc0
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spelling	oai:doaj.org-article:bbcc79b224174a45b7fe0b6a5f3dccc02021-12-02T17:51:11ZFactors contributing to spatial–temporal variations of observed oxygen concentration over the Qinghai-Tibetan Plateau10.1038/s41598-021-96741-62045-2322https://doaj.org/article/bbcc79b224174a45b7fe0b6a5f3dccc02021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-96741-6https://doaj.org/toc/2045-2322Abstract Oxygen (O2) is the most abundant molecule in the atmosphere after nitrogen. Previous studies have documented that oxygen concentration remains nearly constant (20.946%) at all altitudes. Here we show for the first time that oxygen concentration varies significantly from earlier consensus and shows strong spatial and seasonal differences. Field observations on the Qinghai-Tibetan Plateau (QTP) indicate oxygen concentration of 19.94–20.66% (2018, n = 80), 19.98–20.78% (2019, n = 166) and 19.97–20.73% (2020, n = 176), all statistically different from earlier reports (p < 0.001) and are lower than the nearly constant. The mean oxygen concentration in summer (20.47%) is 0.31% higher than that of winter (20.16%) (n = 53) at identical locations in 2019, sampled in the Qilian Mountains, northwest QTP. We used LMG (The Lindeman, Merenda and Gold) method to estimate the relative contributions of altitude, air temperature and vegetation index (Fractional Vegetation Cover, FVC and Leaf Area Index, LAI) to oxygen concentration, which are 47%, 32% and 3% (FVC, R2 = 82%); 45%, 30% and 7% (LAI, R2 = 82%), respectively. These findings provide a new perspective for in-depth understanding on population risk in high altitude regions in the context of global climate change, to ensure the health and safety of residents and tourists in high altitude regions and promoting the stability, prosperity and sustainable development of high-altitude regions worldwide.Peijun ShiYanqiang ChenGangfeng ZhangHaiping TangZhi ChenDeyong YuJing YangTao YeJing’ai WangShunlin LiangYonggui MaJidong WuPeng GongNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Peijun Shi Yanqiang Chen Gangfeng Zhang Haiping Tang Zhi Chen Deyong Yu Jing Yang Tao Ye Jing’ai Wang Shunlin Liang Yonggui Ma Jidong Wu Peng Gong Factors contributing to spatial–temporal variations of observed oxygen concentration over the Qinghai-Tibetan Plateau
description	Abstract Oxygen (O2) is the most abundant molecule in the atmosphere after nitrogen. Previous studies have documented that oxygen concentration remains nearly constant (20.946%) at all altitudes. Here we show for the first time that oxygen concentration varies significantly from earlier consensus and shows strong spatial and seasonal differences. Field observations on the Qinghai-Tibetan Plateau (QTP) indicate oxygen concentration of 19.94–20.66% (2018, n = 80), 19.98–20.78% (2019, n = 166) and 19.97–20.73% (2020, n = 176), all statistically different from earlier reports (p < 0.001) and are lower than the nearly constant. The mean oxygen concentration in summer (20.47%) is 0.31% higher than that of winter (20.16%) (n = 53) at identical locations in 2019, sampled in the Qilian Mountains, northwest QTP. We used LMG (The Lindeman, Merenda and Gold) method to estimate the relative contributions of altitude, air temperature and vegetation index (Fractional Vegetation Cover, FVC and Leaf Area Index, LAI) to oxygen concentration, which are 47%, 32% and 3% (FVC, R2 = 82%); 45%, 30% and 7% (LAI, R2 = 82%), respectively. These findings provide a new perspective for in-depth understanding on population risk in high altitude regions in the context of global climate change, to ensure the health and safety of residents and tourists in high altitude regions and promoting the stability, prosperity and sustainable development of high-altitude regions worldwide.
format	article
author	Peijun Shi Yanqiang Chen Gangfeng Zhang Haiping Tang Zhi Chen Deyong Yu Jing Yang Tao Ye Jing’ai Wang Shunlin Liang Yonggui Ma Jidong Wu Peng Gong
author_facet	Peijun Shi Yanqiang Chen Gangfeng Zhang Haiping Tang Zhi Chen Deyong Yu Jing Yang Tao Ye Jing’ai Wang Shunlin Liang Yonggui Ma Jidong Wu Peng Gong
author_sort	Peijun Shi
title	Factors contributing to spatial–temporal variations of observed oxygen concentration over the Qinghai-Tibetan Plateau
title_short	Factors contributing to spatial–temporal variations of observed oxygen concentration over the Qinghai-Tibetan Plateau
title_full	Factors contributing to spatial–temporal variations of observed oxygen concentration over the Qinghai-Tibetan Plateau
title_fullStr	Factors contributing to spatial–temporal variations of observed oxygen concentration over the Qinghai-Tibetan Plateau
title_full_unstemmed	Factors contributing to spatial–temporal variations of observed oxygen concentration over the Qinghai-Tibetan Plateau
title_sort	factors contributing to spatial–temporal variations of observed oxygen concentration over the qinghai-tibetan plateau
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/bbcc79b224174a45b7fe0b6a5f3dccc0
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Factors contributing to spatial–temporal variations of observed oxygen concentration over the Qinghai-Tibetan Plateau

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