气候变化领域集成服务门户(CCPortal): Phenological Changes in Alpine Grasslands and Their Influencing Factors in Seasonally Frozen Ground Regions Across the Three Parallel Rivers Region, Qinghai-Tibet Plateau

CCPortal

DOI	10.3389/feart.2021.797928
	Phenological Changes in Alpine Grasslands and Their Influencing Factors in Seasonally Frozen Ground Regions Across the Three Parallel Rivers Region, Qinghai-Tibet Plateau
	Wang, Chun-Ya; Wang, Jin-Niu; Wang, Xu-Feng; Luo, Dong-Liang; Wei, Yan-Qiang; Cui, Xia; Wu, Ning; Bagaria, Priyamvada
通讯作者	Wang, JN (通讯作者)，Chinese Acad Sci, Chengdu Inst Biol, Chengdu, Peoples R China. ; Wang, JN (通讯作者)，Tibet Ecol Secur Barrier Ecol Monitoring Network, Mangkang Ecol Monitoring Stn, Qamdo, Peoples R China.
发表日期	2022
EISSN	2296-6463
卷号	9
英文摘要	Alpine ecosystems are sensitive and vulnerable to climate change. In this study, we extracted three phonological parameters, viz. the start of the growing season (SOS), the end of the growing season (EOS), and the length of the growing season (LOS) from the moderate resolution imaging spectroradiometer (MODIS) normalized difference vegetation index (NDVI) dataset during 2000-2019 for alpine grasslands across the three parallel rivers region (TPRR), and also examined the spatiotemporal heterogeneity of the three phenological parameters in seasonally frozen ground regions (hereafter referred to as SFGR) in response to climate change. The results showed that the multiyear mean SOS gradually delayed from 100 to 160 days along higher elevation, EOS advanced as a whole (from 320 to 280 days), and LOS shortened (from 210 to 130 days). The multiyear mean spatial distribution of all the three parameters showed significant north-to-south differences in the TPRR. In general, the variation trends in all the phenological parameters were not significant (p > 0.05) in the past 20 years, where SOS was advanced by 0.16 days year(-l), EOS delayed by 0.08 days year(-l), and consequently LOS extended at a rate of 0.07 days year(-l), likely due to the warming and drying climate during the study period. In addition, annual mean temperature (AMT) was negatively correlated with SOS (50.26%) and positively correlated with EOS and LOS (72.25 and 60%, respectively). As for the annual mean total precipitation (AMP), it was positively correlated with SOS and EOS (50.77 and 52.97%, respectively) and negatively correlated with LOS (52.07%). Furthermore, a higher freezing index led to a delayed SOS and an advanced EOS and a shortened LOS at the regional scale. Similar to AMT, a higher thawing index advanced the SOS, delayed the EOS, and extended the LOS. Our results confirmed the importance of climate and permafrost status on vegetation phenological processes and also contributed toward understanding the response of cold region ecosystems to global climate change.
关键词	GREEN-UP DATES VEGETATION PHENOLOGY CLIMATE-CHANGE SPRING PHENOLOGY SATELLITE DATA IMPACTS MODIS RESPONSES COVER INDEX
英文关键词	vegetation phenology; river basin; spatio-temporal changes; climate factors; freezing; thawing index; TIMESAT
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000771041900001
来源期刊	FRONTIERS IN EARTH SCIENCE
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254167
作者单位	[Wang, Chun-Ya; Wang, Jin-Niu; Wu, Ning; Bagaria, Priyamvada] Chinese Acad Sci, Chengdu Inst Biol, Chengdu, Peoples R China; [Wang, Chun-Ya] Chengdu Univ Technol, Earth Sci Coll, Chengdu, Peoples R China; [Wang, Chun-Ya; Wang, Xu-Feng] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Remote Sensing Gansu Prov, Heihe Remote Sensing Expt Res Stn, Lanzhou, Peoples R China; [Wang, Jin-Niu] Tibet Ecol Secur Barrier Ecol Monitoring Network, Mangkang Ecol Monitoring Stn, Qamdo, Peoples R China; [Luo, Dong-Liang] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou, Peoples R China; [Wei, Yan-Qiang] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou, Peoples R China; [Cui, Xia] Lanzhou Univ, Sch Resources & Environm Sci, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Wang, Chun-Ya,Wang, Jin-Niu,Wang, Xu-Feng,et al. Phenological Changes in Alpine Grasslands and Their Influencing Factors in Seasonally Frozen Ground Regions Across the Three Parallel Rivers Region, Qinghai-Tibet Plateau[J]. 中国科学院西北生态环境资源研究院,2022,9.
APA	Wang, Chun-Ya.,Wang, Jin-Niu.,Wang, Xu-Feng.,Luo, Dong-Liang.,Wei, Yan-Qiang.,...&Bagaria, Priyamvada.(2022).Phenological Changes in Alpine Grasslands and Their Influencing Factors in Seasonally Frozen Ground Regions Across the Three Parallel Rivers Region, Qinghai-Tibet Plateau.FRONTIERS IN EARTH SCIENCE,9.
MLA	Wang, Chun-Ya,et al."Phenological Changes in Alpine Grasslands and Their Influencing Factors in Seasonally Frozen Ground Regions Across the Three Parallel Rivers Region, Qinghai-Tibet Plateau".FRONTIERS IN EARTH SCIENCE 9(2022).