Introduction

Garcia, Rolando V.

doi:10.1016/b978-0-08-025823-2.50008-6

Cited by 2 publications

(2 citation statements)

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“…It leads to degradation of soils and desertification (Nicholson et al, 1998;Pickup, 1998), social alarm (Morales et al, 2000) and famine and impoverishment (García, 1984;Kanti, 1998).…”

Section: Introductionmentioning

confidence: 98%

Differences in Spatial Patterns of Drought on Different Time Scales: An Analysis of the Iberian Peninsula

Vicente‐Serrano

2006

Water Resour Manage

356

221

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The differences in spatial patterns of drought over a range of time scales were analysed by the Standardized Precipitation Index (SPI). In a climatic area with a wide range of precipitation characteristics (the Iberian Peninsula), Pearson III distribution is flexible enough to calculate the drought index on different time scales. The Pearson III distribution was adapted to precipitation frequencies at time scales of 1, 3, 6, 12, 24 and 36 months. Spatial patterns of drought were analysed by Principal Component Analysis. The number of components found increased as the time scale did, which indicates great spatial complexity in drought analysis and uncertainty in drought classification, mainly at scales of 24 or 36 months, since the relationships between SPI series of observatories becomes more distant as the time scale increases. We concluded that there were no homogeneous regions with similar drought patterns that could be used for effective drought management or early warning.

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“…It leads to degradation of soils and desertification (Nicholson et al, 1998;Pickup, 1998), social alarm (Morales et al, 2000) and famine and impoverishment (García, 1984;Kanti, 1998).…”

Section: Introductionmentioning

confidence: 98%

Differences in Spatial Patterns of Drought on Different Time Scales: An Analysis of the Iberian Peninsula

Vicente‐Serrano

2006

Water Resour Manage

356

221

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“…Thus, social scientists increasingly argue that desertification, as well as food futures, are influenced not by natural environmental constraints and population growth, but by political and economic structures and processes. Excellent reviews of these arguments have been recently provided by Grainger (1982), Watts (1983), and Timberlake (1985); building upon previous work by Glantz (1977), Franke and Chasin (1980), and Garcia (1981).…”

Section: Resultsmentioning

confidence: 99%

Global food futures and desertification

Hekstra

Liverman

1986

Climatic Change

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Assessments of the future of food supply and demand at global and regional scales must consider both the environmental and social constraints on agricultural production. Desertification is one of these constraints~ and may actually be accelerated in the drive for agriculturally-based economic development or food self-sufficlency. In this paper we first consider two key studies of food futures--a 1981 study by the United Nations Food and Agriculture Organization (FAO), and a 1982 study by FAO-UNFPA-IIASA--and review their assessments of environmental and social constraints, climatic change and desertification. We suggest that the studies axe somewhat optimistic in assessing both the social and environmental constraints on food systems, and note that the concern about desertification plays a small role in these studies.

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Introduction

Cited by 2 publications

References 0 publications

Differences in Spatial Patterns of Drought on Different Time Scales: An Analysis of the Iberian Peninsula

Differences in Spatial Patterns of Drought on Different Time Scales: An Analysis of the Iberian Peninsula

Global food futures and desertification

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