Changes in vegetation photosynthetic activity trends across the Asia-Pacific region over the last three decades

被引：144

作者：

Chen, Baozhang ^{[1
,2
]}

Xu, Guang ^{[1
]}

Coops, Nicholas C. ^{[2
]}

Ciais, Philippe ^{[3
]}

Innes, John L. ^{[2
]}

Wang, Guangyu ^{[2
]}

Myneni, Ranga B. ^{[4
]}

Wang, Tongli ^{[5
]}

Krzyzanowski, Judi ^{[2
]}

Li, Qinglin ^{[6
]}

Cao, Lin ^{[2
]}

Liu, Ying ^{[7
]}

机构：

[1] Univ Chinese Acad Sci, State Key Lab Resources & Environm Informat Syst, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China

[2] Univ British Columbia, Dept Forest Resource Management, Vancouver, BC V6T 1Z4, Canada

[3] Univ Versailles St Quentin En Yvelines, Lab Sci Climat & Environm, Unite Mixte Rech, CNRS,Commissariat Energie Atom, F-91191 Gif Sur Yvette, France

[4] Boston Univ, Dept Earth & Environm, Boston, MA 02215 USA

[5] Univ British Columbia, Dept Forest Sci, Ctr Forest Conservat Genet, Vancouver, BC V6T 1Z4, Canada

[6] Minist Forests Lands & Nat Resource Operat, Forest Anal & Inventory Branch, Victoria, BC V8W 9C2, Canada

[7] Beijng Forestry Univ, Sch Soil & Water Conservat, Beijing 100083, Peoples R China

来源：

REMOTE SENSING OF ENVIRONMENT | 2014年 / 144卷

基金：

美国国家科学基金会;

关键词：

Climate change; Vegetation growth dynamics; NDVI; Time series analysis; Gradual changes; Trend breaks; Breakpoint; Turning point; Asia-Pacific region; NET PRIMARY PRODUCTION; INTERANNUAL VARIABILITY; CLIMATE VARIABILITY; NORTH-AMERICA; INDEX; PATTERNS; CLASSIFICATIONS; THRESHOLDS; ACCURACY; DYNAMICS;

D O I：

10.1016/j.rse.2013.12.018

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The updated Global Inventory Modeling and Mapping Studies (GIMMS) third generation global satellite Advanced Very High Resolution Radiometer (AVHRR) Normalized Difference Vegetation Index (NDVI) dataset provides very detailed global information on the state of vegetation from 1982 to 2011. Using these data we investigated the changes in the vegetation photosynthetic activity in the Asia-Pacific (AP) (including Australia, South East Asia, China, and the Pacific Coast of North America) region, by discerning gradual changes into two key metrics: 1) the cumulative annual NDVI in each year and 2) the seasonality or variance in that index. We then assessed changes using break and turning points using three statistical models (least-square linear, expanded paired-consecutive linear and piecewise regression models). We found that the AP region overall experienced increasing NDVI from 1982 through 2011 with an average rate of 530 x 10(-4) NDVI yr(-1) (0.13% yr(-1)). The annual NDVI increased from 1982 at a faster rate of 26.14 x 10(-4) NDVI yr-1 (0.65% yr(-1)) until a break in the trend after 1991 (after that the trend reduced to 5.78 x 10(-4) NDVI yr(-1)). In the Asia-Australia (AA) subarea of the AP, vegetation greening slowly increased at 8.71 x 10(-4) NDVI yr(-1) before 2003 and then increased to 28.30 x 10(-4) NDVI yr(-1) after 2003. In contrast, in the North America (NA) subarea NDVI rapidly increased initially at 18.72 x 10(-4) NDVI yr(-1) before 1992 and then marginally increased (3.96 x 10(-4) NDVI yr(-1)) after 1992. The turning points were found to be 2008 and 1987 for the AA and NA subareas respectively. Analysis of monthly NDVI data showed that the trends were positive for most of the months of the study period, particularly during the growing season. Geospatial analyses demonstrated that cumulative annual NDVI and the variance or seasonality across the large AP region varied across the different subareas. As well, we found evidence for different spatial patterns of the NDVI changes with strong spatial heterogeneity in the patterns of the break and turning points. This suggests complex and nonlinear responses of vegetation photosynthetic activity to regional climatic changes and other drivers. (C) 2014 Elsevier Inc. All rights reserved.

引用

页码：28 / 41

页数：14

共 68 条

[31] The vegetation cover dynamics (1982-2006) in different erosion regions of the Yellow River Basin, China [J].