The nature and impact of climate change in the Challenge Program on Water and Food (CPWF) basins

Mulligan, Mark; Fisher, Myles J.; Sharma, Bharat R.; Xu, Zhixing; Ringler, Claudia; Mahé, Gil; Jarvis, Andy; Ramírez, Julián; Clanet, Jean-Charles; Ogilvie, Andrew; Ahmad, Mobin-ud-Din

doi:10.1080/02508060.2011.543408

Cited by 24 publications

(13 citation statements)

References 36 publications

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“…For reasons of comparability we used the same number of models (19) for both the A1B and A2 scenarios. Although studies highlight the variable performance of global climate models in the tropical Andes [Mulligan et al, 2011], we did not weight the models in the data set. The main reason for this is the difficulty to define adequate weights, because different models dominate in different geographical regions and for different variables.…”

Section: Datamentioning

confidence: 99%

Water for cities: The impact of climate change and demographic growth in the tropical Andes

Buytaert

Bièvre²

2012

Water Resources Research

183

113

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[1] Globally, water resources for cities are under increasing stress. Two main stressors are climate change and population growth, but evaluating their relative impact is difficult, especially because of the complex topology of water supply. This is especially true in the tropical Andes, which is a region with strong climatic gradients and topographical limits to water resources. This paper presents an evaluation of both stressors on water resources in a geospatial framework to identify gradients in water availability that may lead to conflicts over water use. We focus on four major cities in, or receiving water from, the tropical Andes. A multimodel data set of 19 climate models is used as input for a regional water balance model. Per capita water availability is evaluated along topographic gradients for the present and for future scenarios of population growth and climate change. In all cases, the median projection of climate change suggests a relatively limited impact on water availability, but uncertainties are large. Despite these uncertainties, we find that the expected demographic changes are very likely to outpace the impact of climate change on water availability and should therefore be the priority for local policy making. However, distinctive geospatial patterns characterize the supply systems of the studied cities, highlighting the need to analyze the topology of water supply within an ecosystem services context. Our approach is flexible enough to be extended to other regions, stressors and water resources topologies.

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Section: Datamentioning

confidence: 99%

Water for cities: The impact of climate change and demographic growth in the tropical Andes

Buytaert

Bièvre²

2012

Water Resources Research

183

113

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“…Inter-annual and long-term variability of rainfall are an important component of water availability in some of the basins, but there are few datasets that would allow us to compare them across basins (Mulligan et al 2011). We defer here to the BFP studies to indicate in which basins this variability is important (see the later section on water resources in basins).…”

Section: Variability and Seasonalitymentioning

confidence: 98%

Water availability and use across the Challenge Program on Water and Food (CPWF) basins

Mulligan

Cruz

Peña‐Arancibia

et al. 2011

Water International

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This paper analyses water availability and use within and between the Challenge Program on Water and Food basins. It describes the main features of water demand and supply in the basins and indicates where there are deficits and opportunities for development of water resources. A typology of basin water resources status uses a range of global spatial datasets. The main outcomes of basin activities on water availability are identified. Interbasin assessment of water availability is very challenging for such very large basins, due in large part to difficulties in collecting and integrating local data sets.

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“…Other workers who used simulation based on GCMs and global scenarios include: Karl et al [2], Nobre et al [3], Arnell [4], Agrawala et al [5], Dessai and Hulme [6], Eastham et al [7], Arnell et al [8], Mulligan et al [9], Scherler et al [10], Xu et al [11]. …”

Section: Methodsmentioning

confidence: 99%

“…In a multi-country study on Basin Focal Project basins, Mulligan et al [9] used multi-global circulation models of SRES scenario downscaled and extracted for each basin. Significant differences in positive and negative impacts of climate change were observed within and among basins.…”

Section: Modelling Approachmentioning

confidence: 99%

Effect of Climate Change on Water Resources and Water Management Practices: A Review of Research Methods and Findings with Special Reference to Australia

Makuei¹

2016

JEASE

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Abstract:In this secondary research, published works on effect of climate change on water resources in other countries and in Australia were reviewed critically. Research question, objectives and assumptions were made to facilitate this study. First, methods used for such studies and their results at global level were reviewed. Then Australian specific methods of study and findings were reviewed. More commonly, both globally and in Australia, simulations using long-term real data on selected climatic scenarios of global climatic models are projected for long-term future trends. The validity and certainty of predicted occurrences depend upon the closeness of real time data with scenarios to which they are projected. Even with these limitations, projections of already rising temperatures and declining rainfall on surface water and ground water availabilities show gradual decline in water availability leading to water stress both for human communities and ecosystems The role of human-induced emissions in hastening the degradation process has also been investigated. Conserving all available water, practising efficient water consumption and prudent water policies only can provide some relief from what is inevitable.

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The nature and impact of climate change in the Challenge Program on Water and Food (CPWF) basins

Cited by 24 publications

References 36 publications

Water for cities: The impact of climate change and demographic growth in the tropical Andes

Water for cities: The impact of climate change and demographic growth in the tropical Andes

Water availability and use across the Challenge Program on Water and Food (CPWF) basins

Effect of Climate Change on Water Resources and Water Management Practices: A Review of Research Methods and Findings with Special Reference to Australia

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