Rainfall variability and trends in semi-arid Botswana: implications for climate change adaptation policy. (Special Issue: Climate change and applied geography - place, policy, and practice.)

Batisani N.; Yarnal B.

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Rainfall variability and trends in semi-arid Botswana: implications for climate change adaptation policy. (Special Issue: Climate change and applied geography - place, policy, and practice.)

机译：半干旱博茨瓦纳的降雨变异性和趋势：对气候变化适应政策的影响。（特刊：气候变化和应用地理-地点，政策和实践。）

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Rainfall variability is an important feature of semi-arid climates, and climate change is likely to increase that variability in many of these regions. An understanding of rainfall variability and trends in that variability is needed to help vulnerable dryland agriculturalists and policymakers address current climate variation and future climate change. The goals of this paper are to examine this climatic phenomenon in semi-arid Botswana, to investigate these results for signs of climate change, and to explore the policy implications for climate adaptation. To reach these goals, the paper determines rainfall variability and monthly and annual trends in that variability. The results agree with earlier work showing gradients in rainfall and rainfall variability across Botswana. The results also identify a trend towards decreased rainfall throughout the nation, which is associated with decreases in the number of rainy days. Both the drying trend and decrease in rainy days agree with climate change projections for southern Africa. The paper discusses policies that the government could adopt to help its farmers adapt to climate change.Digital Object Identifier http://dx.doi.org/10.1016/j.apgeog.2009.10.007

机译：降雨多变性是半干旱气候的重要特征，而气候变化很可能会在许多这些地区增加这种多变性。需要了解降雨的变化性和变化趋势，以帮助脆弱的旱地农业学家和决策者解决当前的气候变化和未来的气候变化。本文的目的是研究半干旱博茨瓦纳的这种气候现象，调查这些结果以寻找气候变化的迹象，并探讨其对气候适应的政策意义。为了实现这些目标，本文确定了降雨的变异性以及该变异性的月度和年度趋势。结果与早期的研究结果相符，后者显示了博茨瓦纳的降雨梯度和降雨变异性。结果还确定了全国降雨减少的趋势，这与雨天数的减少有关。干燥趋势和雨天减少都符合南部非洲的气候变化预测。本文讨论了政府可以采取的帮助农民适应气候变化的政策。数字对象标识符http://dx.doi.org/10.1016/j.apgeog.2009.10.007

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《Applied Geography》 |2010年第4期|共7页
作者
Batisani N.; Yarnal B.;
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正文语种 eng
中图分类自然地理学;
关键词
adaptation; agricultural production; arid lands; climatic change; dry farming; environmental policy; government policy; rain; semiarid zones; trends; wet seasonSouthern Africa; Africa South of Sahara; Africa; Least Developed Countries; Developing Countries; ACP Countries; Commonwealth of Nations; SADC Countries; Anglophone Africa.;

机译：适应;农业生产;干旱土地;气候变化;旱作农业;环境政策;政府政策;雨水;半干旱地区;趋势;湿季;南部非洲;撒哈拉以南非洲;非洲;最不发达国家;发展中国家;ACP国家;国家;SADC国家;非洲英语。;

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Rainfall variability and trends in semi-arid Botswana: implications for climate change adaptation policy. (Special Issue: Climate change and applied geography - place, policy, and practice.)

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