气候变化领域集成服务门户(CCPortal): Has the Dominant Climatic Driver for the Carbon Budget of Alpine Grassland Shifted from Temperature to Precipitation on the Qinghai-Tibet Plateau?

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DOI	10.3390/rs15102492
	Has the Dominant Climatic Driver for the Carbon Budget of Alpine Grassland Shifted from Temperature to Precipitation on the Qinghai-Tibet Plateau?
	Hu, Zhigang; Niu, Ben; Tang, Jiwang; Zhang, Yu; Xiang, Mingxue; Zhang, Xianzhou
发表日期	2023
EISSN	2072-4292
卷号	15 期号:10
英文摘要	The alpine grassland on the Qinghai-Tibet Plateau (AG(QTP)) has undergone severe climate change. Although the carbon budget of AG(QTP) proved to have altered significantly, the spatiotemporal dynamics and the driving mechanism of the changes remain debated. This study estimated the gross primary productivity (GPP), ecosystem respiration (ER), and net ecosystem productivity (NEP) of the AG(QTP), based on remote sensing models, and analyzed their spatiotemporal dynamics and their climatic driving mechanism. Our results showed that the GPP, ER, and NEP increased at rates of 0.002 Pg C yr(-2), 0.013 Pg C yr(-2), and 0.0007 Pg C yr(-2), respectively, during 2000-2020, with substantial spatiotemporal variability. The changes in GPP were influenced by both temperature and precipitation, while NEP and ER were primarily affected by precipitation and temperature, respectively. However, the primary climatic driver of the carbon budget may have shifted from temperature to precipitation around 2010, and the impact of temperature on carbon sink was limited by local water conditions. Furthermore, we found that climate change, particularly precipitation variation, had notable legacy effects on the carbon budget of the AG(QTP). Our findings highlight that the climatic impact on the carbon budget is dynamic and long-lasting, rather than static and short-lived, which should be considered in ecosystem carbon budget simulations and other related studies.
关键词	alpine grassland carbon budget climate change legacy effect Qinghai-Tibet Plateau
英文关键词	GROSS PRIMARY PRODUCTION; ECOSYSTEM RESPIRATION; NORTHERN CHINA; DECOMPOSITION; RESPONSES; DYNAMICS; LITTER; FLUXES; PHENOLOGY; EXCHANGE
WOS研究方向	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:000996625400001
来源期刊	REMOTE SENSING
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282629
作者单位	Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
推荐引用方式 GB/T 7714	Hu, Zhigang,Niu, Ben,Tang, Jiwang,et al. Has the Dominant Climatic Driver for the Carbon Budget of Alpine Grassland Shifted from Temperature to Precipitation on the Qinghai-Tibet Plateau?[J],2023,15(10).
APA	Hu, Zhigang,Niu, Ben,Tang, Jiwang,Zhang, Yu,Xiang, Mingxue,&Zhang, Xianzhou.(2023).Has the Dominant Climatic Driver for the Carbon Budget of Alpine Grassland Shifted from Temperature to Precipitation on the Qinghai-Tibet Plateau?.REMOTE SENSING,15(10).
MLA	Hu, Zhigang,et al."Has the Dominant Climatic Driver for the Carbon Budget of Alpine Grassland Shifted from Temperature to Precipitation on the Qinghai-Tibet Plateau?".REMOTE SENSING 15.10(2023).