Impact of the Antarctic Ozone Hole on the Vertical Coupling of the Stratosphere–Mesosphere–Lower Thermosphere System
Impact of the Antarctic Ozone Hole on the Vertical Coupling of the Stratosphere–Mesosphere–Lower Thermosphere System
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DOI：
10.1175/jas-d-15-0189.1
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发表时间：
2016-06
影响因子：
3.1
通讯作者：
Sandro W. Lubis;N. Omrani;K. Matthes;S. Wahl
中科院分区：
文献类型：
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作者：
Sandro W. Lubis;N. Omrani;K. Matthes;S. Wahl
有证据表明，由南极臭氧空洞引起的冷却引起的平流层西风增强，导致极地中层变暖，随后在低热层冷却。虽然以前的研究主要集中在未分辨(重力)波阻力过滤的作用上，但这里详细地探讨了分辨(行星)波阻力和辐射强迫对南极中层和低热层(MLT)的作用。利用NCAR的社区地球系统模式版本1(全大气社区气候模式)[CESM1(WACCM)]模拟发现，在春末夏初，由东风非分辨波阻引起的极地中层异常增暖被西风分辨波阻引起的异常动力冷却所抑制。这种可分辨的波阻归因于行星尺度波(k=1-3)的活动，它是由臭氧空洞引起的夏季中层东风急流的不稳定增加而在原地产生的。在另一个哈..。
AbstractThere is evidence that the strengthened stratospheric westerlies arising from the Antarctic ozone hole–induced cooling cause a polar mesospheric warming and a subsequent cooling in the lower thermosphere. While previous studies focus on the role of nonresolved (gravity) wave drag filtering, here the role of resolved (planetary) wave drag and radiative forcing on the Antarctic mesosphere and lower thermosphere (MLT) is explored in detail. Using simulations with NCAR’s Community Earth System Model, version 1 (Whole Atmosphere Community Climate Model) [CESM1(WACCM)], it is found that in late spring and early summer the anomalous polar mesospheric warming induced by easterly nonresolved wave drag is dampened by anomalous dynamical cooling induced by westerly resolved wave drag. This resolved wave drag is attributed to planetary-scale wave (k = 1–3) activity, which is generated in situ as a result of increased instability of the summer mesospheric easterly jet induced by the ozone hole. On the other ha...