Impact of stratospheric variability on tropospheric climate change
Impact of stratospheric variability on tropospheric climate change
复制标题
平流层变率对对流层气候变化的影响
DOI：
10.1007/s00382-009-0580-1
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发表时间：
2009
期刊：
影响因子：
4.6
通讯作者：
Dall'Amico M
中科院分区：
文献类型：
--
作者：
Dall'Amico M
1979-2003年期间，哈德利中心HadGEM 1耦合海洋大气模式模拟中包括了改进的平流层表示法，其中包括自然和人为强迫。采用了一个改进的平流层臭氧数据集，其中包括臭氧的自然变化以及通常的人为趋势。此外，在第二组模拟平流层赤道纬向风的准两年振荡（QBO）也施加使用松弛对ERA-40纬向风值。对对流层变率和趋势的影响进行了说明。我们发现，在对流层顶的模拟冷却率提高了改进的臭氧数据集，这种改善是更显着的QBO时，也包括在内。热带对流层上部的变暖趋势也是如此，但略有减少。我们平流层的改进产生了显着的内部变率增加，但没有改变的积极趋势，年平均全球平均近地表温度。在北冰洋的大部分地区，变暖率显著增加。平流层代表性的改善，特别是QBO松弛，导致近地表温度和降水响应El Chichón火山爆发，特别是在热带地区的大幅减少。冬季增加的阶段的北方环形模式观察后，最近的两个主要的火山爆发的部分捕获，特别是在埃尔Chichón喷发。南环模态（SAM）的正趋势增加，并变得具有统计意义，这表明观测到的SAM增加在很大程度上受到平流层内部变化的影响。可能列入未来的评估充分臭氧化学模拟和重力波计划内部产生的QBO进行了讨论。
An improved stratospheric representation has been included in simulations with the Hadley Centre HadGEM1 coupled ocean atmosphere model with natural and anthropogenic forcings for the period 1979–2003. An improved stratospheric ozone dataset is employed that includes natural variations in ozone as well as the usual anthropogenic trends. In addition, in a second set of simulations the quasi biennial oscillation (QBO) of stratospheric equatorial zonal wind is also imposed using a relaxation towards ERA-40 zonal wind values. The resulting impact on tropospheric variability and trends is described. We show that the modelled cooling rate at the tropopause is enhanced by the improved ozone dataset and this improvement is even more marked when the QBO is also included. The same applies to warming trends in the upper tropical troposphere which are slightly reduced. Our stratospheric improvements produce a significant increase of internal variability but no change in the positive trend of annual mean global mean near-surface temperature. Warming rates are increased significantly over a large portion of the Arctic Ocean. The improved stratospheric representation, especially the QBO relaxation, causes a substantial reduction in near-surface temperature and precipitation response to the El Chichón eruption, especially in the tropical region. The winter increase in the phase of the northern annular mode observed in the aftermath of the two major recent volcanic eruptions is partly captured, especially after the El Chichón eruption. The positive trend in the southern annular mode (SAM) is increased and becomes statistically significant which demonstrates that the observed increase in the SAM is largely subject to internal variability in the stratosphere. The possible inclusion in simulations for future assessments of full ozone chemistry and a gravity wave scheme to internally generate a QBO is discussed.
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DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
M. Dall’Amico;J. Egger
通讯作者：
J. Egger
影响因子：
7.5
作者：
J. Houghton;Y. Ding;D. Griggs;M. Noguer;P. Linden;X. Dai;K. Maskell;C. Johnson
通讯作者：
J. Houghton;Y. Ding;D. Griggs;M. Noguer;P. Linden;X. Dai;K. Maskell;C. Johnson
臭氧引起的非绝热加热异常在准两年一次振荡中的作用
DOI：
--
发表时间：
1995
期刊：
影响因子：
--
作者：
Dingmin Li;K. Shine;L. Gray
通讯作者：
L. Gray
新哈德利中心全球环境模型 (HadGEM1) 中大气的物理特性。
DOI：
--
发表时间：
2006
期刊：
影响因子：
--
作者：
M. Ringer;G. Martin;C. Z. Greeves;T. Hinton;P. James;V. Pope;Adam A. Scaife;R. Stratton;P. Inness;J. Slingo;Gui‐Ying Yang
通讯作者：
Gui‐Ying Yang
平流层温度趋势：臭氧变化和 QBO 的影响
影响因子：
4.6
作者：
M. Dall’Amico;L. Gray;K. Rosenlof;Adam A. Scaife;K. Shine;P. Stott
通讯作者：
P. Stott