气候变化领域集成服务门户(CCPortal): Increasing altitudinal gradient of spring vegetation phenology during the last decade on the Qinghai-Tibetan Plateau

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DOI	10.1016/j.agrformet.2014.01.003
	Increasing altitudinal gradient of spring vegetation phenology during the last decade on the Qinghai-Tibetan Plateau
	Shen, Miaogen; Zhang, Gengxin; Cong, Nan; Wang, Shiping; Kong, Weidong; Piao, Shilong
通讯作者	Zhang, GX (通讯作者)
发表日期	2014
ISSN	0168-1923
EISSN	1873-2240
起始页码	71
结束页码	80
卷号	189
英文摘要	Spring vegetation phenology in temperate and cold regions is widely expected to advance with increasing temperature, and is often used to indicate regional climatic change. The Qinghai-Tibetan Plateau (QTP) has recently experienced intensive warming, but strongly contradictory evidence exists regarding changes in satellite retrievals of spring vegetation phenology. We investigated spatio-temporal variations in green-up date on the QTP from 2000 to 2011, as determined by five methods employing vegetation indices from each of the four sources: three Normalized Difference Vegetation Index (NDVI) from the Advanced Very High Resolution Radiometer (AVHRR), Systeme Pour l'Observation de la Terre (SPOT), MODerate resolution Imaging Spectroradiometer (MODIS), and the Enhanced Vegetation Index (EVI) from MODIS. Results indicate that, at the regional scale, all vegetation indices and processing methods consistently found no significant temporal trend (all P > 0.05). This insignificance resulted from substantial spatial heterogeneity of trends in green-up date, with a notably delay in the southwest region, and widespread advancing trend in the other areas, despite a region-wide temperature increase. These changes doubled the altitudinal gradient of green-up date, from 0.63 days 100 m(-1) in the early 2000s to 1.30 days 100 m(-1) in the early 2010s. The delays in the southwest region and at high altitudes were likely caused by the decline in spring precipitation, rather than the increasing spring temperature, suggesting that spring precipitation may be an important regulator of spring phenological response to climatic warming over a considerable area of the QTP. Consequently, a delay in spring vegetation phenology in the QTP may not necessarily indicate spring cooling. Furthermore, the phenological changes retrieved from the widely used AVHRR NDVI differed from those retrieved from SPOT and MODIS NDVIs and MODIS EVI, necessitating the use of multiple datasets when monitoring vegetation dynamics from space. (C) 2014 Elsevier B.V. All rights reserved.
关键词	GREEN-UP DATES CLIMATE-CHANGE CENTRAL HIMALAYA SPOT-VEGETATION GROWING-SEASON CARBON BALANCE ALPINE-MEADOW NO EVIDENCE SNOW COVER NDVI
英文关键词	Climate change; NDVI; Precipitation; Spring temperature; Spring vegetation phenology; Tibetan Plateau
语种	英语
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000333852900009
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258276
推荐引用方式 GB/T 7714	Shen, Miaogen,Zhang, Gengxin,Cong, Nan,et al. Increasing altitudinal gradient of spring vegetation phenology during the last decade on the Qinghai-Tibetan Plateau[J]. 中国科学院青藏高原研究所,2014,189.
APA	Shen, Miaogen,Zhang, Gengxin,Cong, Nan,Wang, Shiping,Kong, Weidong,&Piao, Shilong.(2014).Increasing altitudinal gradient of spring vegetation phenology during the last decade on the Qinghai-Tibetan Plateau.AGRICULTURAL AND FOREST METEOROLOGY,189.
MLA	Shen, Miaogen,et al."Increasing altitudinal gradient of spring vegetation phenology during the last decade on the Qinghai-Tibetan Plateau".AGRICULTURAL AND FOREST METEOROLOGY 189(2014).