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遥感技术与应用  2016, Vol. 31 Issue (5): 1003-1012    DOI: 10.11873/j.issn.1004-0323.2016.5.1003
遥感应用     
21世纪初中国农作物与自然植被物候时空差异
封敏1,李再明2,邱炳文1,王重洋3,4,罗钰涵1
(1.福州大学 地理空间信息技术国家地方联合工程研究中心、空间数据挖掘与信息共享教育部
重点实验室,福建 福州 350002;2.岳阳市云溪区农业局,湖南 岳阳 414009;
3.中国科学院广州地球化学研究所,广东 广州 510640;4.中国科学院大学,北京 100049)
Spatio-temporal Difference of Crops and Natural Vegetation Phenology in China at the Beginning of the 21st Century
Feng Min1,Li Zaiming2,Qiu Bingwen1,Wang Chongyang3,4,Luo Yuhan1
(1.National Engineering Research Centre of Geospatial Information Technology,
Key Laboratory of Spatial Data Mining &Information Sharing of Ministry of Education,Fuzhou University,Fuzhou 350002,China;
2.Agricultural Development Bureau of Yunxi Area,Yueyang 414009,China;
3.Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China;
4.University of Chinese Academy of Sciences,Beijing 100049,China)
 全文: PDF(7559 KB)  
摘要:

利用离散小波方法对2001~2012年MODIS EVI时序数据进行平滑,基于动态阈值法提取我国植被物候信息,探讨农作物和自然植被物候的时空变化特征。结果表明:①我国第一季农作物开始、峰值和结束日期主要以华北平原为中心随海拔的上升而推迟,而自然植被物候更早20 d左右,且随海拔的上升先推迟后提前;②物候在时序上有显著变化的第一季区域,43.98%开始日期、52.83%峰值日期呈现提前趋势,多在开始晚、结束早的西南区及东北与内蒙古交界处,其余区域开始、峰值日期及81.80%结束日期呈推迟趋势,发生在开始早、结束晚的黄土高原及双季农作区;农作物物候推迟幅度小于自然植被。

关键词: 植被物候MODIS EVI小波分析动态阈值法时空变化    
Abstract:

A smoothing algorithm based on discrete wavelet was firstly applied to the MODIS EVI time\|series data from 2001 to 2012 to minimize the effects of anomalous values caused by atmospheric haze and cloud contamination,based on dynamic threshold method to extract vegetation phenology information of China,study the spatio\|temporal variation characteristics of crops and natural vegetation phenology,The results indicate:①In the first season of crops,start date,peak date and end date mainly with altitude rise delayed centred on north China Natural vegetation phenology advance than crops about 20 days,As the rise of the altitude to delay first,and then in advance;②In temporal,Phenological have significant changes area of the first quarter,43.98% of start date,52.83% of peak date have trends in advance,Mainly in southwest,the junction of the northeast and Inner Mongolia,where the start date later and end date early.The rest of the region,start date,peak date and 81.80% of end date showed a trend of delay,Mainly in Loess Plateau and double season crop area;Crop phenological delay rate is less than natural vegetation.

 

Key words: Vegetation phenology    MODIS EVI    Wavelet analysis    Dynamic threshold method    Spatio-temporal variation
收稿日期: 2015-10-12 出版日期: 2016-11-25
:  TP 79  
基金资助:

国家自然科学基金项目(41471362)。

通讯作者: 邱炳文(1973-),女,湖南浏阳人,研究员,〖JP3〗主要从事地理信息系统教学及时空数据挖掘方面的研究。Email:qiubingwen@fzu.edu.cn。   
作者简介: 封敏(1989-),男,江西抚州人,硕士研究生,主要从事空间分析及空间决策支持。Email:fm386415707@163.com。
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引用本文:

封敏,李再明,邱炳文,王重洋,罗钰涵. 21世纪初中国农作物与自然植被物候时空差异[J]. 遥感技术与应用, 2016, 31(5): 1003-1012.

Feng Min,Li Zaiming,Qiu Bingwen,Wang Chongyang,Luo Yuhan. Spatio-temporal Difference of Crops and Natural Vegetation Phenology in China at the Beginning of the 21st Century. Remote Sensing Technology and Application, 2016, 31(5): 1003-1012.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2016.5.1003        http://www.rsta.ac.cn/CN/Y2016/V31/I5/1003

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