Geoscience Reference
In-Depth Information
synthesis, issues and prospects.
Quaternary Science Reviews
,
21
, 783-797.
Thomas, D.S.G. and Twyman, C. (2004) Good or bad range-
land? Hybrid knowledge, science and local understandings
of vegetation dynamics in the Kalahari.
Land Degradation
and Development
,
15
, 215-231.
Thompson, R.D. (1975) The climate of the arid world, University
of Reading, Geographical Paper 35.
Thornthwaite, C.W. (1948) An approach towards a rational clas-
sification of climate.
Geographical Review
,
38
, 55-94.
Tricart, J. and Cailleux, A. (1969)
Le Modele des Regions Seches
,
Sedes, Paris.
Tucker, C.J., Dregne, H.E. and Newcomb, W.W. (1991) Expan-
sion and contraction of the Sahara Desert from 1980 to 1990.
Science
,
253
, 299.
UN (1977) Status of Desertification in the Arid Regions,
Climatic Aridity Index Map and Experimental World
Scheme of Aridity and Drought Probability, at a Scale of
1:25,000,000. Explanatory Note, UN Conference on Deser-
tification A/CONF. 74/31, New York.
UNDP/UNCCD (2010).
The forgotten billion: MDG achieve-
ment in the drylands.
UNDP Bureau for Development Policy,
New York.
UNEP (1992)
World Atlas of Desertification
, Edward Arnold,
Sevenoaks.
UNESCO (1979)
Map of the World Distribution of Arid Regions
,
MAP Technical Note 4, UNESCO, New York.
Vogel, J.C., Rogers, J. and Seely, M.K. (1981) Summary of
SASQUA Congress, May 1981.
South African Journal of
Science
,
77
, 435-436.
Ward, J.D., Seely, M.K. and Lancaster, N. (1983) On the an-
tiquity of the Namib.
South African Journal of Science
,
79
,
175-183.
Yeaton, R.I. (1988) Structure and function of the Namib dune
grasslands: characteristics of the environmental gradients
and species distributions.
Journal of Ecology
,
76
, 744-
758.
Zeng, N., Neelin, J.D., Lau, K.-M. and Tucker, C.J. (1999) En-
hancement of interdecadal climate variability in the Sahel by
vegetation interaction.
Science
,
286
, 1537-1540.
