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African Droughts and Dust Transport to the Caribbean: Climate Change Implications

机译:非洲干旱和灰尘向加勒比的运输:气候变化的影响

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摘要

Great quantities of African dust are carried over large areas of the Atlantic and to the Caribbean during much of the year. Measurements made from 1965 to 1998 in Barbados trade winds show large interannual changes that are highly anticorrelated with rainfall in the Soudano-Sahel, a region that has suffered varying degrees of drought since 1970. Regression estimates based on long-term rainfall data suggest that dust concentrations were sharply lower during much of the 20th century before 1970, when rainfall was more normal. Because of the great sensitivity of dust emissions to climate, future changes in climate could result in large changes in emissions from African and other arid regions that, in turn, could lead to impacts on climate over large areas.
机译:在一年中的大部分时间里,大量的非洲灰尘被带到大西洋的大片区域并流向加勒比。从1965年至1998年在巴巴多斯的贸易风中进行的测量显示,年际变化与Soudano-Sahel(自1970年以来遭受不同程度的干旱)的降雨高度相关。基于长期降雨数据的回归估计表明,尘埃在1970年之前的20世纪大部分时间里,雨水的浓度都大大降低了,那时降雨更为正常。由于粉尘排放物对气候非常敏感,因此未来的气候变化可能导致非洲和其他干旱地区的排放物发生大的变化,进而可能对大范围的气候产生影响。

著录项

  • 来源
    《Science》 |2003年第5647期|p.1024-1027|共4页
  • 作者单位

    Cooperative Institute for Marine and Atmospheric Studies, Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149-1098, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

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