ENSO循环对东亚地区平流层臭氧分布的影响

发布时间：2018-01-10 01:35

本文关键词：ENSO循环对东亚地区平流层臭氧分布的影响　出处：《高原气象》2017年03期 　论文类型：期刊论文

【摘要】：采用NOAA提供的ONI(Oceanic Ni泺o Index)指数资料与欧洲中心提供的臭氧再分析资料,以滞后相关为切入点,分析了ENSO循环对东亚地区平流层臭氧分布的影响,探讨了ENSO不同位相(El Ni泺o、La Ni泺a)对臭氧场的强迫影响程度,并且用ENSO对剩余环流的影响解释了平流层臭氧变化的动力机制。结果表明:(1)ENSO对东亚地区平流层臭氧的分布有明显的影响,在平流层30 h Pa和70 h Pa尤为显著,且滞后8个月时二者相关达到最大;(2)El Ni泺o发生8个月后中纬度地区平流层30 h Pa的臭氧有所减少,而高纬度臭氧增加,70 h Pa则与之相反,同时在低纬度地区70 h Pa臭氧减少;La Ni泺a反之;(3)Ni泺o3.4区海温与滞后8个月臭氧的SVD分析结果也有类似的变化;(4)El Ni泺o和La Ni泺a的影响之间有显著的差异,在分别滞后于El Ni泺o和La Ni泺a事件8个月后平流层低层的臭氧含量差异可达-25%以上。(5)ENSO可以通过影响剩余环流的变化,进而影响臭氧分布发生以上的变化。
[Abstract]:Using the ONI(Oceanic Ni 莽茫 o Index index data provided by NOAA and the ozone reanalysis data provided by the European Centre, lag correlation is used as an entry point. The influence of ENSO cycle on stratospheric ozone distribution in East Asia is analyzed, and the forcing effect of different phases of ENSO on ozone field is discussed. The dynamic mechanism of stratospheric ozone change is explained by the influence of ENSO on the residual circulation. The results show that ENSO has a significant effect on the distribution of stratospheric ozone in East Asia. In the stratosphere, 30hPa and 70hPa are particularly significant, and the correlation between them reaches the maximum when they lag for 8 months. Eight months after the occurrence of El Ni Luo, ozone in the stratosphere at 30 HPA in the mid-latitudes decreased, whereas the ozone in the high latitude increased by 70 HPA. At the same time, 70 HPA ozone was decreased in low latitude. La Ni Lora; The results of SVD analysis of SST and ozone with a delay of 8 months also show a similar change in the area of Ni Luo 3.4. There is a significant difference between the influence of El Ni Loro and La Ni Lua. Eight months after the El Ni Luo and La Ni Lora events, the difference in ozone content in the lower stratosphere can reach to more than -25%. ENSO can influence the variation of the residual circulation. Furthermore, the ozone distribution is affected by the above changes.
【作者单位】：云南大学大气科学系;广东省气候中心;
【基金】：国家自然科学基金(41275072)
【分类号】：P421.32;P732
【正文快照】： DOI:10.7522/j.issn.1000-0534.2016.000681引言臭氧(O3)是平流层的重要微量成分之一,它可以吸收太阳释放出来的绝大部分紫外线,使动植物免遭其危害,对地球生物圈起到保护作用。此外,值得注意的是,平流层O3吸收紫外辐射决定了温度场的特征,即平流层的存在与变化决定于O3。同时

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