Proxy global assessment of land degradation
Abstract Land degradation is always with us but its causes, extent and severity are contested. We define land degradation as a long‐term decline in ecosystem function and productivity, which may be assessed using long‐term, remotely sensed normalized difference vegetation index (NDVI) data. Deviatio...
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crwiley:10.1111/j.1475-2743.2008.00169.x 2024-09-09T20:11:19+00:00 Proxy global assessment of land degradation Bai, Z. G. Dent, D. L. Olsson, L. Schaepman, M. E. 2008 http://dx.doi.org/10.1111/j.1475-2743.2008.00169.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1475-2743.2008.00169.x http://onlinelibrary.wiley.com/wol1/doi/10.1111/j.1475-2743.2008.00169.x/fullpdf en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Soil Use and Management volume 24, issue 3, page 223-234 ISSN 0266-0032 1475-2743 journal-article 2008 crwiley https://doi.org/10.1111/j.1475-2743.2008.00169.x 2024-08-01T04:21:22Z Abstract Land degradation is always with us but its causes, extent and severity are contested. We define land degradation as a long‐term decline in ecosystem function and productivity, which may be assessed using long‐term, remotely sensed normalized difference vegetation index (NDVI) data. Deviation from the norm may serve as a proxy assessment of land degradation and improvement – if other factors that may be responsible are taken into account. These other factors include rainfall effects which may be assessed by rain‐use efficiency, calculated from NDVI and rainfall. Results from the analysis of the 23‐year Global Inventory Modeling and Mapping Studies (GIMMS) NDVI data indicate declining rain‐use efficiency‐adjusted NDVI on ca. 24% of the global land area with degrading areas mainly in Africa south of the equator, South‐East Asia and south China, north‐central Australia, the Pampas and swaths of the Siberian and north American taiga; 1.5 billion people live in these areas. The results are very different from previous assessments which compounded what is happening now with historical land degradation. Economic appraisal can be undertaken when land degradation is expressed in terms of net primary productivity and the resultant data allow statistical comparison with other variables to reveal possible drivers. Article in Journal/Newspaper taiga Wiley Online Library Soil Use and Management 24 3 223 234 |
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English |
description |
Abstract Land degradation is always with us but its causes, extent and severity are contested. We define land degradation as a long‐term decline in ecosystem function and productivity, which may be assessed using long‐term, remotely sensed normalized difference vegetation index (NDVI) data. Deviation from the norm may serve as a proxy assessment of land degradation and improvement – if other factors that may be responsible are taken into account. These other factors include rainfall effects which may be assessed by rain‐use efficiency, calculated from NDVI and rainfall. Results from the analysis of the 23‐year Global Inventory Modeling and Mapping Studies (GIMMS) NDVI data indicate declining rain‐use efficiency‐adjusted NDVI on ca. 24% of the global land area with degrading areas mainly in Africa south of the equator, South‐East Asia and south China, north‐central Australia, the Pampas and swaths of the Siberian and north American taiga; 1.5 billion people live in these areas. The results are very different from previous assessments which compounded what is happening now with historical land degradation. Economic appraisal can be undertaken when land degradation is expressed in terms of net primary productivity and the resultant data allow statistical comparison with other variables to reveal possible drivers. |
format |
Article in Journal/Newspaper |
author |
Bai, Z. G. Dent, D. L. Olsson, L. Schaepman, M. E. |
spellingShingle |
Bai, Z. G. Dent, D. L. Olsson, L. Schaepman, M. E. Proxy global assessment of land degradation |
author_facet |
Bai, Z. G. Dent, D. L. Olsson, L. Schaepman, M. E. |
author_sort |
Bai, Z. G. |
title |
Proxy global assessment of land degradation |
title_short |
Proxy global assessment of land degradation |
title_full |
Proxy global assessment of land degradation |
title_fullStr |
Proxy global assessment of land degradation |
title_full_unstemmed |
Proxy global assessment of land degradation |
title_sort |
proxy global assessment of land degradation |
publisher |
Wiley |
publishDate |
2008 |
url |
http://dx.doi.org/10.1111/j.1475-2743.2008.00169.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1475-2743.2008.00169.x http://onlinelibrary.wiley.com/wol1/doi/10.1111/j.1475-2743.2008.00169.x/fullpdf |
genre |
taiga |
genre_facet |
taiga |
op_source |
Soil Use and Management volume 24, issue 3, page 223-234 ISSN 0266-0032 1475-2743 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1475-2743.2008.00169.x |
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Soil Use and Management |
container_volume |
24 |
container_issue |
3 |
container_start_page |
223 |
op_container_end_page |
234 |
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1809945879033937920 |