气候变化领域集成服务门户(CCPortal): Differential responses of respiration and photosynthesis to air temperature over a moist tundra ecosystem of Alaska and its impact on changing carbon cycle

CCPortal

DOI	10.1088/2515-7620/ad3c17
	Differential responses of respiration and photosynthesis to air temperature over a moist tundra ecosystem of Alaska and its impact on changing carbon cycle
	Lee, Ji-Yeon; Chae, Namyi; Kim, Yongwon; Yun, Juyeol; Jeong, Sujong; Choi, Taejin; Kim, Seong-Joong; Lee, Bang-Yong; Park, Sang-Jong
发表日期	2024
ISSN	2515-7620
起始页码	6
结束页码	4
卷号	6 期号:4
英文摘要	This study analyzed the sensitivities of carbon cycle to surface air temperature using the CO2 flux data collected from June to September for six years (2014-2019) over a moist tundra site in Council, Alaska. The tundra ecosystem was a strong sink of carbon in June and July, a weak sink in August with rapidly decreasing photosynthesis, and a carbon source in September. The ecosystem respiration (Re) and gross primary production (GPP) were obtained from the net ecosystem exchange (NEE) of eddy-covariance system. Both the Re and GPP increased with temperature, enhancing carbon emission and uptake during observation period. Notably, Re showed higher sensitivity to temperature than GPP did. This result means that as global warming continues, the increase in carbon release is greater than the increase in carbon uptake. In other words, the tundra ecosystem is expected to become a weaker carbon sink in June and July and a stronger source of carbon in September. Possible mechanism of different temperature sensitivities of Re and GPP as well as temporal variations of temperature sensitivities are suggested. Present results highlight the importance of understanding the temperature sensitivities of Re and GPP in various tundra ecosystems to accurately understand changes in the carbon cycle in the Arctic region.
英文关键词	moist tundra ecosystem; carbon cycle; Global warming; temperature sensitivity; ecosystem respiration; GPP; NEE
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:001204904400001
来源期刊	ENVIRONMENTAL RESEARCH COMMUNICATIONS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/297021
作者单位	Korea Polar Research Institute (KOPRI); Korea University; University of Alaska System; University of Alaska Fairbanks; Korea Atomic Energy Research Institute (KAERI); Seoul National University (SNU); Korea Polar Research Institute (KOPRI)
推荐引用方式 GB/T 7714	Lee, Ji-Yeon,Chae, Namyi,Kim, Yongwon,et al. Differential responses of respiration and photosynthesis to air temperature over a moist tundra ecosystem of Alaska and its impact on changing carbon cycle[J],2024,6(4).
APA	Lee, Ji-Yeon.,Chae, Namyi.,Kim, Yongwon.,Yun, Juyeol.,Jeong, Sujong.,...&Park, Sang-Jong.(2024).Differential responses of respiration and photosynthesis to air temperature over a moist tundra ecosystem of Alaska and its impact on changing carbon cycle.ENVIRONMENTAL RESEARCH COMMUNICATIONS,6(4).
MLA	Lee, Ji-Yeon,et al."Differential responses of respiration and photosynthesis to air temperature over a moist tundra ecosystem of Alaska and its impact on changing carbon cycle".ENVIRONMENTAL RESEARCH COMMUNICATIONS 6.4(2024).