气候变化领域集成服务门户(CCPortal): Radiative and Chemical Effects of Non-Homogeneous Methane on Terrestrial Carbon Fluxes in Asia

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DOI	10.1029/2023JD040204
	Radiative and Chemical Effects of Non-Homogeneous Methane on Terrestrial Carbon Fluxes in Asia
	Zhang, Qian; Wang, Tijian; Wu, Hao; Qu, Yawei; Xie, Min; Li, Shu; Zhuang, Bingliang; Li, Mengmeng; Kilifarska, Natalya Andreeva
发表日期	2024
ISSN	2169-897X
EISSN	2169-8996
起始页码	129
结束页码	8
卷号	129 期号:8
英文摘要	Methane (CH4) plays a crucial role in shaping terrestrial ecosystems due to its radiative effect and atmospheric photochemical reactions. In this study, we employed an enhanced regional climate-chemistry-ecosystem model (RegCM-Chem-YIBs) to comprehensively evaluate the impacts of both radiative and chemical effects of CH4 on terrestrial carbon fluxes across the East, South, and Southeast Asia (EA, SA, SEA) during the year 2010. Our findings showed that the radiative effects of CH4 yielded a positive influence on carbon fluxes. Specifically, the EA region experienced a significant increase in the gross primary production (GPP), reaching up to 0.515 Pg C Yr-1. In comparison, the SEA region exhibited a decrease in the net ecosystem exchange (NEE) of approximately -0.066 Pg C Yr-1. Further analysis revealed that alterations in radiation and vapor pressure deficit (VPD) were dominant drivers. Conversely, the chemical effects of CH4 lead to heightened regional surface ozone (O3) concentrations (2.704-3.115 ppb) and generate a negative response in carbon fluxes. Within the SEA region, GPP observed a decrease of up to -0.144 Pg C Yr-1, while NEE displayed a significant increase of 0.022 Pg C Yr-1. Taken together, the combined radiative and chemical effects of CH4 indicated a positive impact on regional carbon fluxes, with GPP increasing by 0.632 Pg C Yr-1 and NEE decreasing by -0.09 Pg C Yr-1. This holistic perspective is crucial for comprehending the intricate interactions linking climate change, atmospheric pollution, and the global carbon cycle. As the second-largest greenhouse gas in our atmosphere, methane (CH4) is significantly influenced by human activities, and its emission sources are extensively distributed across East, South, and Southeast Asia (EA, SA, SEA). Moreover, the radiative and chemical effects of CH4 in the atmosphere have far-reaching implications for terrestrial carbon fluxes. Our research demonstrates that the radiative effects of CH4 have a positive influence on terrestrial carbon fluxes, primarily driven by variations in radiation and vapor pressure deficit (VPD). Conversely, the chemical effects of CH4 result in increased regional surface ozone (O3) concentrations, negatively affecting terrestrial carbon fluxes. Overall, the total impact of CH4 is positive on regional terrestrial ecosystem carbon fluxes, leading to a rise in Gross Primary Productivity (GPP) by 0.632 Pg C Yr-1 and a reduction in net ecosystem exchangeby -0.09 Pg C Yr-1. Our comprehensive study encompasses both radiative and chemical aspects of CH4, providing a quantified evaluation of their distinct influences on terrestrial carbon fluxes. This research lays a critical scientific foundation for developing policies to mitigate methane emissions. The improved model accurately captures atmospheric methane's spatiotemporal patterns, significantly influencing meteorology and radiation Radiative effects of methane enhance terrestrial carbon fluxes, mainly influenced by alterations in radiation and vapor pressure deficit Chemical effects of methane amplify ozone production, which negatively affects terrestrial carbon fluxes but exhibits less influence
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:001200535200001
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/294961
作者单位	Nanjing University; China Meteorological Administration; Jinling Institute of Technology; Nanjing Normal University; Bulgarian Academy of Sciences
推荐引用方式 GB/T 7714	Zhang, Qian,Wang, Tijian,Wu, Hao,et al. Radiative and Chemical Effects of Non-Homogeneous Methane on Terrestrial Carbon Fluxes in Asia[J],2024,129(8).
APA	Zhang, Qian.,Wang, Tijian.,Wu, Hao.,Qu, Yawei.,Xie, Min.,...&Kilifarska, Natalya Andreeva.(2024).Radiative and Chemical Effects of Non-Homogeneous Methane on Terrestrial Carbon Fluxes in Asia.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,129(8).
MLA	Zhang, Qian,et al."Radiative and Chemical Effects of Non-Homogeneous Methane on Terrestrial Carbon Fluxes in Asia".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 129.8(2024).