Mechanisms Linking Volcanic Aerosols to the Atlantic Meridional Overturning Circulation
Mechanisms Linking Volcanic Aerosols to the Atlantic Meridional Overturning Circulation
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DOI：
10.1175/2011jcli4067.1
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发表时间：
2012-04
影响因子：
4.9
通讯作者：
A. Iwi;L. Hermanson;K. Haines;R. Sutton
中科院分区：
文献类型：
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作者：
A. Iwi;L. Hermanson;K. Haines;R. Sutton
摘要本研究在气象局统一模式（HadCM 3）的第三种气候配置中考察了气候系统对火山气溶胶强迫的敏感性。主要的测试案例是基于19世纪80年代，当时有几次火山爆发，著名的喀拉喀托火山是最大的。这些喷发增加了大气气溶胶的浓度，并导致了一段时间的全球地表温度下降。在这项研究中，HadCM 3的集合已经与政府间气候变化专门委员会第四次评估报告模拟的标准辐射强迫和气溶胶相结合，从1860年至今。第二个集合去除了1880年至1899年的火山气溶胶。全强迫集合显示，从1894年左右开始，大约在45° N的大西洋纬向翻转环流（AMOC）增加了1.2 Sv（1 Sv <$106 m3 s−1），40°N的纬向热输送增加了0.04 PW，北方大西洋SST增加，大约在1894年之后，大约11年。
AbstractThis study examines the sensitivity of the climate system to volcanic aerosol forcing in the third climate configuration of the Met Office Unified Model (HadCM3). The main test case was based on the 1880s when there were several volcanic eruptions, the well-known Krakatau being the largest. These eruptions increased atmospheric aerosol concentrations and induced a period of global cooling surface temperatures. In this study, an ensemble of HadCM3 has been integrated with the standard set of radiative forcings and aerosols from the Intergovernmental Panel on Climate Change Fourth Assessment Report simulations, from 1860 to present. A second ensemble removes the volcanic aerosols from 1880 to 1899. The all-forcings ensemble shows an attributable 1.2-Sv (1 Sv ≡ 106 m3 s−1) increase in the Atlantic meridional overturning circulation (AMOC) at 45°N—with a 0.04-PW increase in meridional heat transport at 40°N and increased northern Atlantic SSTs—starting around 1894, approximately 11 years after the fir...