Understanding long-term (1982-2013) patterns and trends in winter wheat spring green-up date over the North China Plain

doi:10.1016/j.jag.2017.01.008

	Understanding long-term (1982-2013) patterns and trends in winter wheat spring green-up date over the North China Plain
	Wang, Sisi 1,2; Mo, Xingguo 1; Liu, Zhengjia 1,3; Baig, Muhammad Hasan Ali 4; Chi, Wenfeng 5
刊名	INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION
	2017-05-01
卷号	57 页码:235-244
关键词	Spring green-up date Winter wheat North China Plain GIMMS3g NDVI Soil moisture
ISSN号	0303-2434
DOI	10.1016/j.jag.2017.01.008
通讯作者	Mo, Xingguo(moxg@igsnrr.ac.cn) ; Liu, Zhengjia(lzj7sdjn@126.com)
英文摘要	Monitoring the spring green-up date (GUD) has grown in importance for crop management and food security. However, most satellite-based GUD models are associated with a high degree of uncertainty when applied to croplands. In this study, we introduced an improved GUD algorithm to extract GUD data for 32 years (1982-2013) for the winter wheat croplands on the North China Plain (NCP), using the third-generation normalized difference vegetation index from Global Inventory Modeling and Mapping Studies (GIMMS3g NDVI). The spatial and temporal variations in GUD with the effects of the pre-season climate and soil moisture conditions on GUD were comprehensively investigated. Our results showed that a higher correlation coefficient (r = 0.44, p< 0.01) and lower root mean square error (22 days) and bias (16 days) were observed in GUD from the improved algorithm relative to GUD from the MCD12Q2 phenology product. In spatial terms, GUD increased from the southwest (less than day of year (DOY) 60) to the northeast (more than DOY 90) of the NCP, which corresponded to spatial reductions in temperature and precipitation. GUD advanced in most (78%) of the winter wheat area on the NCP, with significant advances in 37.8% of the area (p<0.05). GUD occurred later at high altitudes and in coastal areas than in inland areas. At the interannual scale, the average GUD advanced from DOY 76.9 in the 1980s (average 1982-1989) to DOY 73.2 in the 1990s (average 1991-1999), and to DOY 70.3 after 2000 (average 2000-2013), indicating an average advance of 1.8 days/decade (r = 0.35, p< 0.05). Although GUD is mainly controlled by the preseason temperature, our findings underline that the effect of the pre-season soil moisture on GUD should also be considered. The improved GUD algorithm and satellite-based long-term GUD data are helpful for improving the representation of GUD in terrestrial ecosystem models and enhancing crop management efficiency. (C) 2017 Elsevier B.V. All rights reserved.
资助项目	Natural Science Foundation of China[41471026] ; Natural Science Foundation of China[41601582] ; Natural Science Foundation of China[41471227] ; China Postdoctoral Science Foundation[2016M590149]
WOS关键词	LAND-SURFACE PHENOLOGY ; SOIL-MOISTURE DATA ; TIME-SERIES DATA ; VEGETATION PHENOLOGY ; CLIMATE-CHANGE ; TIBETAN PLATEAU ; TEMPERATE ECOSYSTEMS ; CROP MANAGEMENT ; DATA SETS ; NDVI DATA
WOS研究方向	Remote Sensing
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000394475700022
资助机构	Natural Science Foundation of China ; China Postdoctoral Science Foundation
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/64765]
专题	中国科学院地理科学与资源研究所
通讯作者	Mo, Xingguo; Liu, Zhengjia
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Beijing 100101, Peoples R China 4.Pakistan Meteorol Dept, Inst Meteorol & Geophys, Karachi, Pakistan 5.Inner Mongolia Agr Univ, Desert Sci & Engn Coll, Hohhot 010018, Peoples R China
推荐引用方式 GB/T 7714	Wang, Sisi,Mo, Xingguo,Liu, Zhengjia,et al. Understanding long-term (1982-2013) patterns and trends in winter wheat spring green-up date over the North China Plain[J]. INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION,2017,57:235-244.
APA	Wang, Sisi,Mo, Xingguo,Liu, Zhengjia,Baig, Muhammad Hasan Ali,&Chi, Wenfeng.(2017).Understanding long-term (1982-2013) patterns and trends in winter wheat spring green-up date over the North China Plain.INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION,57,235-244.
MLA	Wang, Sisi,et al."Understanding long-term (1982-2013) patterns and trends in winter wheat spring green-up date over the North China Plain".INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION 57(2017):235-244.