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As the world's fifth largest coal exporter and a key swing supplier between the Atlantic and Pacific coal markets, South Africa is a crucial player in global markets.  While the country has long been Europe's major supplier of coal, South African exports have begun to shift east and are steadily becoming a major source of coal supply for the Asian coal boom.  This strategic positioning sets the stage for South Africa to become an even more important player in determining how the world trades and prices coal. 

In the coming decade South Africa will face a number of difficult decisions around how to meet increasing domestic coal demand while dealing with climate concerns, increasing exports, and building the infrastructure that would enable the country to significantly expand market share in the global coal trade.  In many ways, the fate of South Africa's coal sector now hangs in the balance.

This paper explores the interplay between South Africa's domestic and export thermal coal markets and what might shape their development in the future. The paper first examines the industrial organisation and political-economy of the coal sector in South Africa.  An overview is provided of coal mining companies, how the current market structure emerged historically, the development of rail and port facilities, and coal costs and prices. Policy and legislative developments are also described. Finally scenarios are developed for local and export coal markets.

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Program on Energy and Sustainable Development
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This paper examines climate adaptation strategies of farmers in the Limpopo Basin of South Africa. Survey results show that while many farmers noticed long-term changes in temperature and precipitation, most could not take remedial action. Lack of access to credit and water were cited as the main factors inhibiting adaptation. Common adaptation responses reported included diversifying crops, changing varieties and planting dates, using irrigation, and supplementing livestock feed. A multinomial logit analysis of climate adaptation responses suggests that access to water, credit, extension services and off-farm income and employment opportunities, tenure security, farmers' asset base and farming experience are key to enhancing farmers' adaptive capacity. This implies that appropriate government interventions to improve farmers' access to and the status of these factors are needed for reducing vulnerability of farmers to climate adversities in such arid areas.

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Agrekon
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Glwadys A. Gbetibouo
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This paper aims to demonstrate the relationships between ENSO and rice production of Jiangxi province in order to identify the reason that ENSO might have little effect on Chinese rice production. Using a data set with measures of Jiangxi's climate and rice production, we find the reason that during 1985 and 2004 ENSO's well correlated with rainfall did not promote Chinese rice production. First, the largest effects of ENSO mostly occur in the months when there is no rice in the field. Second, there is almost no temperature effect. Finally, the monthly distribution of rainfall is almost the same in ENSO and neutral years because the largest effects are during months when there is the least rain. In addition, due to the high irrigation share and reliable and effective irrigation facilities of cultivated land, China's rice production is less climate-sensitive.

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Journal of Geographcial Sciences
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Rosamond L. Naylor
Scott Rozelle
David S. Battisti
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Deforestation is a main driver of climate change and biodiversity loss. An incentive mechanism to reduce emissions from deforestation and forest degradation (REDD) is being negotiated under the United Nations Framework Convention on Climate Change. Here we use the best available global datasets on terrestrial biodiversity and carbon storage to map and investigate potential synergies between carbon and biodiversity-oriented conservation. A strong association (rS= 0.82) between carbon stocks and species richness suggests such synergies would be high, but unevenly distributed. Many areas of high value for biodiversity could be protected by carbon-based conservation, while others could benefit from complementary funding arising from their carbon content. Some high-biodiversity regions, however, would not benefit from carbon-focused conservation, and could become under increased pressure if REDD is implemented. Our results suggest that additional gains for biodiversity conservation are possible, without compromising the effectiveness for climate change mitigation, if REDD takes biodiversity distribution into account.

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Conservation Letters
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Holly Gibbs
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Roughly a billion people around the world continue to live in state of chronic hunger and food insecurity. Unfortunately, efforts to improve their livelihoods must now unfold in the context of a rapidly changing climate, in which warming temperatures and changing rainfall regimes could threaten the basic productivity of the agricultural systems on which most of the world's poor directly depend. But whether climate change represents a minor impediment or an existential threat to development is an area of substantial controversy, with different conclusions wrought from different methodologies and based on different data.

This book aims to resolve some of the controversy by exploring and comparing the different methodologies and data that scientists use to understand climate's effects on food security. It explains the nature of the climate threat, the ways in which crops and farmers might respond, and the potential role for public and private investment to help agriculture adapt to a warmer world. This broader understanding should prove useful to both scientists charged with quantifying climate threats, and policy-makers responsible for crucial decisions about how to respond. The book is especially suitable as a companion to an interdisciplinary undergraduate or graduate level class.

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Springer
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David Lobell
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978-90-481-2952-2
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David Lobell
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David Lobell will be giving two talks this week at the AGU fall meeting:

Towards accurate models of global crop-climate interactions

This talk will provide a brief overview of the major links between climate and crops that are most in need of representation in global models. The talk will then focus on one of the key links - the effect of climate variation on crop productivity across a range of cropping systems and regions. I will present some recent work to use historical datasets to build statistical models at the scale of individual countries. The effects of different datasets and modeling assumption will be explored, to identify areas where statistical models provide robust representation of crop responses to climate. A sample application of these models - estimating the net regional and global impacts of recent trends in climate - will be presented.

Assessing the future of crop yield variability in the United States with downscaled climate projections

One aspect of climate change of particular concern to farmers and food markets is the potential for increased year-to-year variability in crop yields. Recent episodes of food price increases following the Australian drought or Russian heat wave have heightened this concern. Downscaled climate projections that properly capture the magnitude of daily and interannual variability of weather can be useful for projecting future yield variability. Here we examine the potential magnitude and cause of changes in variability of corn yields in the United States up to 2050. Using downscaled climate projections from multiple models, we estimate a distribution of changes in mean and variability of growing season average temperature and precipitation. These projections are then fed into a model of maize yield that explicitly factors in the effect of extremely warm days. Changes in yield variability can result from a shift in mean temperatures coupled with a nonlinear crop response, a shift in climate variability, or a combination of the two. The results are decomposed into these different causes, with implications for future research to reduce uncertainties in projections of future yield variability.

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This meeting is the third in a series of consultations between agricultural scientists (in particular those interested in the conservation and use of crop diversity in plant improvement) and climate scientists on how to adapt agriculture to climate change. The first meeting, also held at Bellagio (3-7 September 2007), looked at the Conservation and Use of Global Crop Genetic Resources in the Face of Climate Change. It identified three major challenges facing the adaptation process: collecting crop diversity before it disappears, using it to breed better adapted crops, and informing key players of the increased need for the conservation and effective use of crop genetic resources in the face of climate change.

The second meeting, held at Stanford University on 16-18 June 2009, looked more specifically at breeding, and in particular at Climate Extremes and Crop Adaptation. Among other things, it recommended that efforts to develop heat tolerant varieties of the major cereals be intensified, and that greater investments be made in genotyping and phenotyping the variation already held in genebanks, and in collecting remaining diversity.

This third meeting in the series, and second at Bellagio, focused on a specific area of intersection between the ground covered by the previous consultations: the role of plants that are closely related to crops but are not themselves cultivated (crop wild relatives, or CWRs for short) in breeding varieties better adapted to future climates. The following questions were asked:

1) What is the evidence for the value of wild relatives in breeding for tolerance to abiotic and biotic stresses in general, and heat and drought tolerance in particular? Are there specific crops where we can anticipate that the collecting and or use of crop wild relatives will be of particular importance in the context of climate change?

2) What are the most useful techniques for identifying gaps in collections of crop wild relatives, what are the areas and populations most threatened by climate change, and areas and populations most likely to yield materials with traits of interest to breeders (especially drought and heat resistance)? And what R&D is needed to improve these techniques or create new, more effective ones?

3) In what form would breeders ideally want genebanks to provide them with crop wild relatives material? What specific changes in the current way genebanks and breeders do business and interact will be necessary to make this happen? What options exist to sustainably finance efforts to collect, conserve and use crop wild relatives, and to expand pre-breeding efforts?

Three specific goals for the proposed meeting. The first is to inform a strategic plan being developed by the Global Crop Diversity Trust, the Millennium Genebank, Bioversity International and the CGIAR Centres to ensure the ex situ conservation of priority crop wild relatives and their long-term availability and use in climate change adaptation and mitigation efforts. The second will be broader set of policy briefs for the crop development community, and the third will be a series of publications that summarize the work leading up to and resulting from the meeting.

Rockefeller Conference Center
Bellagio, Italy

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The recent upheavals in staple food prices, financial markets, and the global economy raise questions about the state of food insecurity, the nature of price variability, and the appropriate strategies for international agricultural development. For decades preceding this turmoil, agriculture had received waning attention from the global development community as real food prices declined on trend. Analysts who worried about food insecurity focused on the fate of poor producers. The dramatic upswing in prices in 2007-08 turned attention toward poor consumers as many countries struggled with food riots, mounting malnutrition, and the adoption of grain self-sufficiency policies. New debates have been spurred over whether real agricultural prices will resume their long downward decline or whether there has been a more general reversal in the real price of food.

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Population and Development Review
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Rosamond L. Naylor
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