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Simulated future sea-level rise due to glacier melt based on regionally and seasonally resolved temperature changes

机译:根据区域和季节解析的温度变化模拟由于冰川融化而导致的未来海平面上升

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摘要

Climate change is expected over the next century as a result of anthropogenic emissions of greenhouse gases and aerosols into the atmosphere, and global average sea level will consequently rise. Estimates indicate that by 2100 sea level will be about 500 mm higher than today as a result of global warming, with thermal expansion of sea water accounting for over half of this rise. The melting of glaciers and ice sheets will contribute much of the remainder. We present an improved calculation of glacier melt, which uses the temperature patterns generated by a coupled atmosphere-ocean general circulation model as inputs to a seasonally and regionally differentiated glacier model. Under specified greenhouse-gas and sulphate-aerosol forcings, our model predicts that glacier melt equivalent to 132 mm of sea-level rise will occur over the period 1990-2100, with a further 76 mm from melting of the Greenland ice sheet. These figures fall within the range of previous estimates made using simpler models; the advantage of our approach is that we take into account the effects of regional and seasonal temperature variations. Our inclusion of these effects increases the calculated glacier melt by 20%.
机译:人为的温室气体和气溶胶向大气排放的结果是,下个世纪气候变化将有望发生,全球平均海平面将因此上升。估计表明,由于全球变暖,到2100年海平面将比今天高出约500毫米,海水的热膨胀占这一上升的一半以上。冰川和冰盖的融化将贡献其余的大部分。我们提出了一种改进的冰川融化计算方法,该方法使用了由耦合的大气-海洋总循环模型产生的温度模式作为季节和区域差异化冰川模型的输入。在特定的温室气体和硫酸盐气溶胶强迫作用下,我们的模型预测,在1990-2100年期间,冰川融化将相当于132毫米海平面上升,而格陵兰冰盖融化还会有76毫米。这些数字属于先前使用较简单模型所做的估算范围;我们方法的优点是我们考虑了区域和季节性温度变化的影响。我们将这些影响包括在内,可使计算出的冰川融化量增加20%。

著录项

  • 来源
    《Nature》 |1998年第6666期|p.474-476|共3页
  • 作者

    J. M. Gregory; J. Oerlemans;

  • 作者单位
  • 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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