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	Comparison of Satellite and Ground-Based Phenology in China's Temperate Monsoon Area
	Wang H. J. ; Dai J. H. ; Ge Q. S.
	2014
关键词	deciduous broadleaf forest green-up date time-series spring phenology climate-change north-america ndvi data vegetation responses modis
英文摘要	Continuous satellite datasets are widely used in tracking vegetation responses to climate variability. Start of season (SOS), for example, can be derived using a number of methods from the time series of satellite reflectance data; however, various methods often produce different SOS measures which limit the application of satellite data in phenological studies. Therefore, we employed five methods to estimate SOS from the Advanced Very High Resolution Radiometer (AVHRR)/normalized difference vegetation index (NDVI) dataset. Subsequently, we compared the SOS with the ground-based first leaf date (FLD) of 12 deciduous broadleaved plant species at 12 sites of the Chinese Phenological Observation Network (CPON). The results show that the latitudinal patterns of five satellite-derived SOS measures are similar to each other but different from the pattern of ground phenology. For individual methods, the variability of SOS time series is significantly different from ground phenology except for HANTS, Polyfit, and Midpoint methods. The SOS calculated using the Midpoint method showed significant correlations with ground phenophases most frequently (in 47.1% of cases). Using the SOS derived from the Midpoint method, significantly earlier trends in SOS were detected in 50.7% of the natural vegetation area from 1982 to 2006.
出处	Advances in Meteorology
收录类别	SCI
语种	英语
ISSN号	1687-9309
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/29569]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Wang H. J.,Dai J. H.,Ge Q. S.. Comparison of Satellite and Ground-Based Phenology in China's Temperate Monsoon Area. 2014.

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