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Remote Sensing Technology and Application  2013, Vol. 28 Issue (6): 1054-1061    DOI:
    
Time Series Characteristics of NDVI in Permanent Wetlands in North America——A Case of Permanent Wetlands in the Southwest of Hudson Bay
Peng Dailiang2,Zhou bin1,Liu Liangyun2 ,Wu Yaoping3,Yang Xiaohua3
(1.Institute of Remote Sensing and Earth Sciences,Hangzhou Normal University,Hangzhou 310036,China;2.Key Laboratory of Digital Earth Science,Institute of Remote Sensing and Digital Earth,Chinese Academy of Sciences,Beijing 100094,China;
3.Space Weather Center Meteorological and Hydrographic Department,Beijing 100094,China)
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Abstract  

In this study,MCD12Q1 over North America from 2001 to 2009 were downloaded,and their overlapping area of the permanent wetlands was taken as the study area.GIMMS NDVI from 1982 to 2006 was used to explore the seasonal and inter\|annual dynamics patterns,and their drivers used the Global Historical Climatology Network-Monthly temperature and precipitation.The results showed that there was a  single-peak curve for seasonal dynamics of NDVI,and the maximum value was appeared in the summer  season.Generally,the average NDVI was increasing from 1982 to 2006 during spring,autumn,and  the whole  of year,while NDVI was decreasing during summer and winter.A positive significant correlation (P<0.01)was observed between the seasonal variations of NDVI and temperature and precipitation around study area,as well as for annual variations of NDVI during spring,summer,autumn with temperature,and during spring,autumn,winter with precipitation showed positive correlation.However,due to the influence of human activities and other disturbances,some uncertainties still need to be studied in future.

Key words:  Permanent wetland      NDVI      Time series characteristics     
Received:  18 November 2012      Published:  28 February 2014
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Peng Dailiang
Zhou bin
Liu Liangyun
Wu Yaoping
Yang Xiaohua

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Peng Dailiang,Zhou bin,Liu Liangyun,Wu Yaoping,Yang Xiaohua. Time Series Characteristics of NDVI in Permanent Wetlands in North America——A Case of Permanent Wetlands in the Southwest of Hudson Bay. Remote Sensing Technology and Application, 2013, 28(6): 1054-1061.

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http://www.rsta.ac.cn/EN/     OR     http://www.rsta.ac.cn/EN/Y2013/V28/I6/1054

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