Weighted multi-model ensemble projection of extreme precipitation in the Mediterranean region using statistical downscaling

Weighted multi-model ensemble projection of extreme precipitation in the Mediterranean region using statistical downscaling
复制标题

使用统计降尺度对地中海地区极端降水进行加权多模式集合预测

DOI:
10.1007/s00704-019-02851-7
复制
发表时间:
2019
影响因子:
3.4
通讯作者:
J. Jacobeit
J. Jacobeit
中科院分区:
地球科学3区
文献类型:
--
作者:
Hertig;Kaspar-Ott;Pollinger;J. Jacobeit

文献摘要

参考文献

被引文献

相似文献

使用加权多模式集合分析了20世纪末和21世纪末之间地中海8个次区域季节性极端降水变化的预测。权重基于统计降尺度范围内预测变量的表现。两个指数的降水稀少,以及两个指数的强降水是降尺度的全球气候模式数据的耦合模式相互比较项目第3和第5阶段(CMIP 3,CMIP 5)多模式集成,考虑两个排放情景。基于极端降水观测的表现以及模式间的一致性,计算出三个加权指标,并随后应用于每个集合。虽然气象干旱预计在大多数情况下会增加,但强降水事件的趋势不太明显,大多数情况下会减少。加权不影响多模式平均值的变化,但会导致集合传播的减少(尽管大多数情况下并不显著),这意味着模式不确定性的减少。由于所考虑的总体和情景对调查结果的影响很小,而且季节和次区域之间的差异也不明显,因此有强有力的证据表明地中海地区的干旱加剧,这意味着重大的社会经济和生态后果。
Projections of seasonal extreme precipitation changes in eight Mediterranean subregions between the end of the twentieth and the end of the twenty-first century are analyzed using weighted multi-model ensembles. Weights are based on the performance of predictor variables in the scope of statistical downscaling. Two indices of precipitation scarcity as well as two indices of heavy precipitation are downscaled from global climate model data of the Coupled Model Intercomparison Project phase 3 and 5 (CMIP3, CMIP5) multi-model ensembles, considering two emission scenarios each. Based on the performance with regard to observations of extreme precipitation as well as inter-model consistency, three weighting metrics are calculated and subsequently applied to each ensemble. While meteorological droughts are projected to increase in most cases, the tendency is less pronounced for heavy precipitation events and mostly points towards reduction. The weighting does not affect the multi-model mean changes, but induces a decrease of ensemble spread (although mostly not significant), implying a decrease of model uncertainty. As the ensemble and scenario considered have minor effect on the findings and also the differences between seasons and subregions are not marked, there is strong evidence for enhanced droughts in the Mediterranean region, implying major socio-economic and ecological consequences.
每日和每月的温度和降水统计数据作为区域气候模型的性能指标。
DOI: 10.3354/cr00932
发表时间: 2010
期刊: Climate Research
影响因子: 1.1
作者:
E. Kjellström;F. Boberg;M. Castro;J. Christensen;G. Nikulin;E. Sánchez
通讯作者: E. Sánchez
模型加权可以改善气候变化的概率预测吗?
DOI: 10.1007/s00382-011-1217-8
发表时间: 2012
期刊: Climate Dynamics
影响因子: 4.6
作者:
J. Räisänen;J. Ylhäisi
通讯作者: J. Ylhäisi
DOI: 10.1007/s00382-004-0422-0
发表时间: 2004-08-01
期刊: CLIMATE DYNAMICS
影响因子: 4.6
作者:
Xoplaki, E;González-Rouco, JF;Wanner, H
通讯作者: Wanner, H
DOI: 10.1007/s00382-017-3737-3
发表时间: 2018-03
期刊: Climate Dynamics
影响因子: 4.6
作者:
Christoph Ring;F. Pollinger;Irena Kaspar‐Ott;E. Hertig;J. Jacobeit;H. Paeth
通讯作者: Christoph Ring;F. Pollinger;Irena Kaspar‐Ott;E. Hertig;J. Jacobeit;H. Paeth
DOI: 10.1016/j.gloplacha.2016.10.009
发表时间: 2017
影响因子: 3.9
作者:
Merkenschlager;Hertig;Jacobeit
通讯作者: Jacobeit