Interannual variations of monthly and seasonal normalized difference vegetation index (NDVI) in China from 1982 to 1999

Piao, Shilong; Fang, Jingyun; Zhou, Liming; Guo, Qinghua; Henderson, Mark; Ji, Wei; Li, Yan; Tao, Shu

doi:10.1029/2002jd002848

Cited by 446 publications

(375 citation statements)

References 34 publications

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“…p values were based on one-tailed hypothesis, and "*", "**", and "***" are for p-values less than 0.1, 0.05, and 0.01, respectively. Vegetation indices in China increased significantly until the mid-1990s, after which the trend was weakened or even reversed according to previous reports [50,52,62]. Similar changes were observed in North America [63].…”

Section: Regression Of Annual Averaged Evi On Growing Season Length Asupporting

confidence: 70%

“…Nevertheless, the rainfall increase in the winter and spring may advance the starting day of DSRTHC, which was suggested by former study that in the water limited areas increasing precipitation in preceding months can advance the growing season [68]. In addition, the increased spring temperature may advance the starting day of DSRTHC and eventually lead to the EVI increase in the spring (Tables 2 and 3) [62,69]. Similarly, a weaker increase in the winter rainfall and spring temperature led to a small increase in the spring DSRTTP EVI.…”

Section: Growing Seasonal Length and Climate Explained The Changes Inmentioning

confidence: 97%

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The Greenness of Major Shrublands in China Increased from 2001 to 2013

et al. 2016

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Abstract:Shrubs have been reported to expand into grassland and polar regions in the world, which causes complex changes in ecosystem carbon, nutrients, and resilience. Given the projected global drying trend, shrubs with their superior drought resistance and tolerance may play more important roles in global ecosystem function. Shrubland exists in all of the climate zones in China, from subtropical to temperate and high cold regions, and they occupy more than 20% of the land area. In this paper, we analyzed the spatiotemporal trend of MODIS (Moderate Resolution Imaging Spectroradiometer) EVI (Enhanced Vegetation Index) for six shrubland types in China from 2001 to 2013 and its relationship to intra-and inter-annual regional climate dynamics. Existing literature reported that the vegetation index did not change significantly in China during 2000-2012. However, we found that the shrubland EVI in China increased significantly at a rate of 1.01ˆ10´3 EVI¨a´1 from 2001 to 2013. Two major shrubland types (subtropical evergreen and temperate deciduous) and two desert types (high-cold desert and temperate desert) increased significantly, whereas subalpine evergreen shrubland decreased at a rate of´0.64ˆ10´3 EVI¨a´1. We also detected a significantly lengthened growing season of temperate deciduous shrubland. The growing season length contributed significantly to the annual averaged EVI for temperate deciduous, subalpine deciduous and subtropical evergreen shrublands. Furthermore, the precipitation variation contributed more to the annual averaged EVI than the temperature. The year-round decrease in rainfall and the increase in temperature led to a significant reduction in the subalpine evergreen shrubland EVI. The enhancement of countrywide shrubland EVI may promote its contribution to the regional ecosystem function and its potential to invade grasslands.

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Section: Regression Of Annual Averaged Evi On Growing Season Length Asupporting

confidence: 70%

Section: Growing Seasonal Length and Climate Explained The Changes Inmentioning

confidence: 97%

The Greenness of Major Shrublands in China Increased from 2001 to 2013

et al. 2016

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“…Previous studies have demonstrated that the influence of climate change on vegetation growth may have a time lag (Piao et al, 2003;Udelhoven et al, 2009). In the HYR region, the grassland NDVI reaches the maximum mainly in August.…”

Section: Restrend Analysismentioning

confidence: 99%

Human-induced grassland degradation/restoration in the central Tibetan Plateau: The effects of ecological protection and restoration projects

Cai

Yang

2015

Ecological Engineering

174

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A B S T R A C TEcological projects are an important and vital method to help ecosystem adaptation and restoration in response to the environment change and human interference. The accurate and objective assessment of ecological projects will assist ecosystem management and adaption. This study took the central Tibetan Plateau as the study area, where a series of ecological projects has been implemented since 2005 to prevent grassland degradation by protecting and restoring the grasslands. Our aim is to explore where and to what extent the ecological projects influenced the grassland variation, using SPOT NDVI-based residual trend as an indicator. The results indicated that before the projects (between 1998 and 2004), human-induced degradation characterized the grassland. However, a general grassland restoration was detected after the projects from 2005 to 2012. Moreover, over 60% of project plots had positive trends in the NDVI residuals. From the spatial patterns, project-induced restoration was detected in the western and northern regions, such as Maduo, Dongde and Xinghai counties. For the eastern regions, the human-induced degradation has been generally mitigated and yet not reversed after the projects. Our results indicated that ecological protection and restoration projects in the central Tibetan Plateau have mitigated the grassland degradation and even reversed the degradation in some areas, and also suggested that the NDVI-based residual trend is a useful indicator for assessing the effectiveness of the ecological projects in alpine regions.

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“…The study of the response of vegetation growth to climate change on regional, continental, and global scales is receiving increasing attention (Myneni et al, 1997;Zhou et al, 2001;Lucht et al, 2002;Piao, 2003;Piao et al, 2006aPiao et al, , 2014Anderson et al, 2010;Peng et al, 2011;Wu et al, 2012). Recent research has indicated a weakening relationship between inter-annual temperature variability and northern vegetation activity over the past three decades (Piao et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Climate change can significantly affect vegetation activity (Myneni et al, 1997;Piao, 2003;Badeck et al, 2004;Garrity et al, 2011;Peng et al, 2011;Chen and Chen, 2013;Wu and Liu, 2013) and influence the terrestrial carbon cycle. Previous studies have reported both positive and negative influences of climate change on vegetation growth.…”

Section: Introductionmentioning

confidence: 99%

Notable shifting in the responses of vegetation activity to climate change in China

Chen

Wang

et al. 2015

Physics and Chemistry of the Earth, Parts A/B/C

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a b s t r a c tThe weakening relationship between inter-annual temperature variability and vegetation activity in the Northern Hemisphere over the last three decades has been reported by a recent study. However, how and to what extent vegetation activity responds to climate change in China is still unclear. We applied the Pearson correlation and partial correlation methods with a moving 15-y window to the GIMMS NDVI dataset from NOAA/AVHRR and observed climate data to examine the variation in the relationships between vegetation activity and climate variables. Results showed that there was an expanding negative response of vegetation growth to climate warming and a positive role of precipitation. The change patterns between NDVI and climate variables over vegetation types during the past three decades pointed an expending negative correlation between NDVI and temperature and a positive role of precipitation over most of the vegetation types (meadow, grassland, shrub, desert, cropland, and forest). Specifically, correlation between NDVI and temperature (P NDVI-T ) have shifted from positive to negative in most of the station of temperature-limited areas with evergreen broadleaf forests, whereas precipitationlimited temperate grassland and desert were characterized by a positive P NDVI-P . This study contributes to ongoing investigations of the effects of climate change on vegetation activity. It is also of great importance for designing forest management strategies to cope with climate change.

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Interannual variations of monthly and seasonal normalized difference vegetation index (NDVI) in China from 1982 to 1999

Cited by 446 publications

References 34 publications

The Greenness of Major Shrublands in China Increased from 2001 to 2013

The Greenness of Major Shrublands in China Increased from 2001 to 2013

Human-induced grassland degradation/restoration in the central Tibetan Plateau: The effects of ecological protection and restoration projects

Notable shifting in the responses of vegetation activity to climate change in China

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