The global precipitation response to volcanic eruptions in the CMIP5 models
The global precipitation response to volcanic eruptions in the CMIP5 models
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DOI：
10.1088/1748-9326/9/10/104012
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发表时间：
2014-10-01
影响因子：
6.7
通讯作者：
Hegerl, Gabriele C.
中科院分区：
文献类型：
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作者：
Iles, Carley E.;Hegerl, Gabriele C.
我们研究了降水对火山爆发的响应，在耦合模型相互比较项目第5阶段（CMIP 5）的历史模拟相比，三个观测数据集，包括一个与海洋覆盖。在CMIP5模式中，全球降水量在火山爆发后显著减少，在潮湿的热带地区减少最多。这也发生在观测的陆地数据和北方寒冷季节的海洋数据中。在模式和观测中，季风降雨在爆发后减少。为了响应个别喷发，ITCZ从CMIP 5中气溶胶浓度较高的半球转移。模式经历了比陆地上更持久的海洋降水响应，但短卫星记录的响应太嘈杂，无法证实这一点。我们检测到火山活动对降水的影响，在所有三个数据集在寒冷的季节，虽然模型低估了响应的大小。在温暖的季节，火山的影响只能轻微地检测到。
We examine the precipitation response to volcanic eruptions in the Coupled Model Intercomparison Project Phase 5 (CMIP5) historical simulations compared to three observational datasets, including one with ocean coverage. Global precipitation decreases significantly following eruptions in CMIP5 models, with the largest decrease in wet tropical regions. This also occurs in observational land data, and ocean data in the boreal cold season. Monsoon rainfall decreases following eruptions in both models and observations. In response to individual eruptions, the ITCZ shifts away from the hemisphere with the greater concentration of aerosols in CMIP5. Models undergo a longer-lasting ocean precipitation response than over land, but the response in the short satellite record is too noisy to confirm this. We detect the influence of volcanism on precipitation in all three datasets in the cold season, although the models underestimate the size of the response. In the warm season the volcanic influence is only marginally detectable.