The contrasting climate response to tropical and extratropical energy perturbations
The contrasting climate response to tropical and extratropical energy perturbations
复制标题
对热带和温带能源扰动的气候响应对比
DOI：
10.1007/s00382-018-4076-8
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发表时间：
2018
期刊：
影响因子：
4.6
通讯作者：
Hawcroft M
中科院分区：
文献类型：
--
作者：
Hawcroft M
跨赤道能量传输，双热带辐合带（DI）的问题和偏差在热带和热带以外的气候模式和能量收支之间的联系已经在多项研究中进行了调查，虽然DI偏差仍然存在于许多模式。在这里，一个耦合的气候模式，HadGEM 2-ES，是用来调查理想化的能量扰动在热带和热带外，在北方和南半球，通过实施平流层气溶胶，反射传入的辐射的反应。高纬度和低纬度强迫对热带气候的影响形成强烈对比，热带降水量的变化和DI偏差的调制，当热带地区变冷，降水远离冷却的半球。这些响应是静音时，热带外的冷却，因为这些能量收支异常激发的纬向能量输送异常的大气和海洋之间的分区。这里的结果强调了HadGEM 2-ES中DI偏差的持续性，这表明了为什么通过许多代气候模型在纠正这些问题方面几乎没有取得进展。跨赤道大气能量传输，热带降水不对称性和热带海表温度偏差之间的高度线性关系也被证明，这些大规模的，持久的偏差可能会实现的改进给出了一些建议。
The link between cross-equatorial energy transport, the double-intertropical convergence zone (DI) problem and biases in tropical and extratropical albedo and energy budgets in climate models have been investigated in multiple studies, though DI biases persist in many models. Here, a coupled climate model, HadGEM2-ES, is used to investigate the response to idealised energy perturbations in the tropics and extratropics, in both the northern and southern hemispheres, through the imposition of stratospheric aerosols that reflect incoming radiation. The impact on the tropical climate of high and low latitude forcing strongly contrasts, with large changes in tropical precipitation and modulation of the DI bias when the tropics are cooled as precipitation moves away from the cooled hemisphere. These responses are muted when the extratropics are cooled, as the meridional energy transport anomalies that are excited by these energy budget anomalies are partitioned between the atmosphere and ocean. The results here highlight the persistence of the DI bias in HadGEM2-ES, indicating why little progress has been made in rectifying these problems through many generations of climate models. A highly linear relationship between cross-equatorial atmospheric energy transport, tropical precipitation asymmetry and tropical sea surface temperature biases is also demonstrated, giving some suggestion as to where improvements in these large scale, persistent biases may be achieved.
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影响因子：
4.6
作者：
Hawcroft, Matt;Haywood, Jim M.;Stephens, Graeme
通讯作者：
Stephens, Graeme
影响因子：
5.2
作者：
Mechoso, Carlos R.;Losada, Teresa;Toniazzo, Thomas
通讯作者：
Toniazzo, Thomas
影响因子：
5.2
作者：
A. Voigt;S. Bony;J. Dufresne;B. Stevens
通讯作者：
A. Voigt;S. Bony;J. Dufresne;B. Stevens
ITCZ 和热带云移动对半球反照率不对称的补偿
影响因子：
4.9
作者：
A. Voigt;B. Stevens;J. Bader;T. Mauritsen
通讯作者：
T. Mauritsen
地球水和能量平衡的半球对称性的奇妙本质
影响因子：
9.5
作者：
Stephens, GL;Hakuba, M.Z.;Hawcroft, MJ;Haywood, JM;Behrangi, AS;Kay, JE;Webster, PJ
通讯作者：
Webster, PJ