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A New Global Assessment of the Status and Trends of Desertification*

Published online by Cambridge University Press:  24 August 2009

Jack A. Mabbutt
Jack A. Mabbutt
Affiliation:
Professor, School of Geography, University of New South Wales, P.O. Box 1, Kensington, New South Wales 2033, Australia.
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Extract

A reassessment of the status and trends of desertification was called for as part of a general assessment of progress in the implementation of the United Nations Plan of Action to Combat Desertification, seven years after the UN Conference on Desertification (UNCOD) in 1977. Because of the inadequate data existing at the country or state level, the basic generalization has been set at a wider regional scale. The new assessment has confirmed the global scale of the problem of desertification as presented to UNCOD, and has increased the area and populations considered to be at risk through its recognition of the threat of desertification in the sub-humid tropics. The threatened area of 4,500 million ha constitutes 35% of the land surface of the Earth, with almost 20% (850 millions) of the world's total human population. Estimates indicate that, of this area, 75% is already moderately desertified, and 30% is severely or very severely desertified.

The rural population affected by severe desertification totals some 280 millions, or 470 millions if the urban component is included, with, respectively, 135 millions and 190 millions severely affected. These are significantly larger than the figures presented to UNCOD—mainly through the inclusion of additional sub-humid land in this assessment, but partly through national population increases and growth in the extent of severely desertified land. Both in terms of areas and population affected, the so-called developing regions are shown to be those worst-hit by desertification; and within these, the tropical semiarid and sub-humid lands tend to be the most ‘critical’ areas.

Type
Main Papers
Information
Environmental Conservation , Volume 11 , Issue 2 , Summer 1984 , pp. 103 - 113
Copyright
Copyright © Foundation for Environmental Conservation 1984

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References

REFERENCES

Anon, [also cited as UNCOD] (1978). United Nations Conference on Desertification… Round-up, Plan of Action and Resolutions. United Nations, New York, NY, USA: iii + 43 pp., fig.Google Scholar
Berry, L. et al. (1983). Assessment of Desertification in the Sudano—Sahelian Region 1977–1984. United Nations Sudano—Sahelian Office (UNSO), New York, NY, USA: xx + 146 pp. [Not available for checking.]Google Scholar
Biswas, Margaret R. (1978). UN Conference on Desertification, in retrospect. Environmental Conservation, 5(4), pp. 247–62.CrossRefGoogle Scholar
Diamant, B.Z. (1980). Environmental repercussions of irrigation development in hot climates. Environmental Conservation, 7(1), pp. 53–8, 2 figs.Google Scholar
Fridriksson, Sturla (1980). Dangerous devegetation and monocultures. Pp. 211–23 and following discussion to p. 332 in Growth Without Ecodisasters? (Ed. Polunin, Nicholas). Macmillan Press, London & Basingstoke, and Halsted Press Division of John Widley & Sons, New York, NY, USA: xxvi + 675 pp., illustr.Google Scholar
Hare, F. Kenneth (1977). Connections between climate and desertification. Environmental Conservation, 4(2), pp. 81–90, 5 figs.CrossRefGoogle Scholar
Hare, F. Kenneth (1983). Climate and Desertification: A Revised Analysis. World Climate Applications Programme Report No. 44, WMO/UNEP, Geneva, Switzerland: xviii + 149 pp.Google Scholar
Kovda, Victor A. (1982). To prevent aridization, combat salinity. Environmental Conservation, 9(4), pp. 323–7.CrossRefGoogle Scholar
Luk, Shiu-Hung (1983). Recent trends of desertification in the Maowsu Desert, China. Environmental Conservation, 10(3), pp. 213–24, 8 figs.CrossRefGoogle Scholar
Mabbutt, Jack A. (1978). The impact of desertification as revealed by mapping. Environmental Conservation, 5(1), pp. 45–56, 4 maps.CrossRefGoogle Scholar
Mather, Alexander S. (1982). The desertification of Central Otago, New Zealand. Environmental Conservation, 9(3), pp. 209–16, 6 figs.CrossRefGoogle Scholar
Secretariat of the UN Conference on Desertification (1977). Desertification: Its Causes and Consequences. Pergamon Press, Oxford, England, UK: v + 448 pp., illustr.Google Scholar
Tolba, Mostafa K. (1984). Guest editorial: A harvest of dust? Environmental Conservation, 11(1), pp. 1–2.Google Scholar
Townley, Ralph (1978). The United Nations Conference on Desertification, held in Nairobi, Kenya, 29 August-9 September 1977. Environmental Conservation, 5(1), pp. 69–70.CrossRefGoogle Scholar
UNESCO (1977). Map of the World Distribution of Arid Regions—Explanatory Note and Coloured Map. MAB Technical Note No. 7, UNESCO, Paris, France: 54 pp., map to scale of 1:25 millions.Google Scholar
Anon, (in press). Desertification Control in Africa: Actions and Directory of Institutions. UNEP, Nairobi, Kenya: 2 vols, ca 325 pp.Google Scholar
Dregne, Harold E. (1984). Combating desertification: Evaluation of progress. Environmental Conservation, Vol. 11(2), pp. 115–21, 8 figs.CrossRefGoogle Scholar
Mabbutt, Jack A. (1984). A new global assessment of the status and trend of desertification. Environmental Conservation, Vol. 11(2), pp. 103–13, 5 figs. [Reprint and this paper.]CrossRefGoogle Scholar
Tolba, Mostafa K. (1984). Guest editorial: A harvest of dust? Environmental Conservation, 11(1), pp. 1–2CrossRefGoogle Scholar
United Nations Environment Programme [cited as UNEP] (1984). General Assessment of Progress in the Implementation of the Plan of Action to Combat Desertification, 1978–1984, Report of the Executive Director. UNEP, Nairobi, Kenya: 58 pp. and annex.Google Scholar