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How soon will climate records of the 20th century be broken according to climate model simulations?

机译:根据气候模型模拟,二十世纪的气候记录将在多久后被打破?

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摘要

What will happen to local record values of temperature and precipitation in a world with ongoing global warming? Here we first examine how many of the observed local temperature maxima of 1901-2006 occurred in the years 2001-2006 and compare the observations with model simulations. Then we study whether, and how soon, the models simulate the climate records of the 20th century to be broken in the ongoing 21 st century.rnIn 27% of our analysis area, the highest annual mean temperatures of the whole period 1901-2006 were observed in 2001-2006. For the 22 climate models in our study, this fraction varies from 17% to 70%, with a multimodel mean of 40%. In simulations based on the SRES A1B emissions scenario, the highest annual mean temperature of the 20th century is exceeded on average in 99% of the global area by the year 2080. The same number for the highest (lowest) annual precipitation total is 60% (43%). Monthly and seasonal temperature and precipitation records are also analysed, and the geographical distributions of record value occurrence are related to the distributions of time mean climate change and magnitude of interannual variability.
机译:在持续全球变暖的世界中,当地记录的温度和降水记录值将如何处理?在这里,我们首先检查在2001-2006年发生了多少观测到的1901-2006年局部最高温度,并将这些观测值与模型模拟进行比较。然后我们研究这些模型是否以及在多长时间后模拟正在发生的21世纪将被打破的20世纪气候记录。rn在我们分析区域的27%中,整个1901-2006年期间的最高年平均温度为在2001-2006年观察到。对于我们研究中的22个气候模型,这一比例从17%到70%不等,多模型平均值为40%。在基于SRES A1B排放情景的模拟中,到2080年,全球平均99%的区域平均超过了20世纪的最高年平均温度。最高(最低)年降水总量的相同数字为60% (43%)。还分析了月度和季节的温度和降水记录,记录值发生的地理分布与时间平均气候变化的分布和年际变化的大小有关。

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  • 来源
    《Tellus》 |2009年第4期|476-490|共15页
  • 作者单位

    Department of Physics, Division of Atmospheric Sciences and Geophysics, P.O. Box 64, FIN-00014 University of Helsinki, Finland;

    Department of Physics, Division of Atmospheric Sciences and Geophysics, P.O. Box 64, FIN-00014 University of Helsinki, Finland;

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