doi:  10.3878/j.issn.1006-9895.1710.17159
南亚高压与邻近地区臭氧年际变化的相互作用

The Interaction between South Asia High and the Interannual Variability of Ozone in the Adjacent Regions
摘要点击 177  全文点击 21  投稿时间:2017-04-24  修订日期:2017-08-03
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基金:  国家自然科学基金
中文关键词:  南亚高压  臭氧低值  年际变化  相互作用  机制
英文关键词:  South Asia High, Ozone low, Interannual variability, Interaction, Mechanism
     
作者中文名作者英文名单位
覃皓QinHao南京信息工程大学气象灾害教育部重点实验室/气候与环境变化国际合作联合实验室/气象灾害预报预警与评估协同创新中心
郭栋GuoDong南京信息工程大学气象灾害教育部重点实验室/气候与环境变化国际合作联合实验室/气象灾害预报预警与评估协同创新中心
引用:覃皓,郭栋.2018.南亚高压与邻近地区臭氧年际变化的相互作用[J].大气科学
Citation:QinHao,GuoDong.2018.The Interaction between South Asia High and the Interannual Variability of Ozone in the Adjacent Regions[J].Chinese Journal of Atmospheric Sciences (in Chinese)
中文摘要:
      利用ERA-interim月平均再分析资料,采用相关分析和信息流方法,分析了1979—2015年夏半年(5-9月)100 hPa上南亚高压与其邻近地区臭氧年际变化的相互作用。结果表明:除了7月外,夏半年南亚高压与南亚高压区臭氧低值(以下简称臭氧低值)的强度年际变化存在相互作用。在部分地区,6月和9月南亚高压和臭氧低值强度变化相互影响,而在5月和8月二者的作用仅仅是单向的。在6月南亚高压和臭氧低值的中部和西部边缘,以及9月南亚高压北部和臭氧低值中心区,臭氧低值增强(减弱)可能是南亚高压增强(减弱)的部分原因,反之亦然。在6月南亚高压和臭氧低值的东南侧、8月南亚高压和臭氧低值的西部和东部,以及9月南亚高压的西部,南亚高压增强(减弱)可能部分导致臭氧低值增强(减弱)。在5月南亚高压中心区和臭氧低值南部,臭氧低值的增强(减弱)可能部分导致了南亚高压的增强(减弱)。根据相关分析,推测当南亚高压区臭氧浓度出现正异常时,辐射加热在其上部(下部)为负异常(正异常),导致高层(低层)辐散出现负异常(正异常),从而使得上升运动出现负异常。高层辐散以及上升运动的负异常最终使南亚高压呈现负异常。而臭氧浓度负异常导致南亚高压呈现正异常的过程与上述过程相反。
Abstract:
      The interaction between South Asia High (SAH) and the interannual variability of ozone in the adjacent regions during the summer half year (May-September) from 1979 to 2015 are studied by using ERA-Interim monthly data and the methods of correlation analysis and information flow. The results show that there is an interaction between the interannual variabilities of SAH intensity and ozone low in the region of Asian Summer Monsoon Anticyclone (hereinafter referred to as ozone low) during the summer half year except in July. In some region, the causal relations between the intensity of SAH and ozone low are interactive in June and September while the relationship becomes one-way causality in May and August. There may be a interaction between the enhancement (weakening) of ozone low and the enhancement (weakening) of SAH in the central and western edge of SAH and ozone low in June and in the northern of SAH and the central area of ozone low in September and vice versa. And the enhancement (weakening) of SAH may influence the enhancement (weakening) of ozone low partly in the southeast of SAH and ozone low in June, western and eastern of SAH and ozone low in August and the western of SAH in September. In May, the enhancement (weakening) of ozone low may partially contribute to the enhancement (weakening) of SAH in the central area of SAH and the southern of ozone low. The correlation analysis suggests when the ozone concentration is positive anomaly in the region of SAH, there is a negative (positive) anomaly of radiation heating above (below) the region which leads to a negative (positive) anomaly of divergence in the higher (lower) level and then causes a negative anomaly of vertical velocity. The negative anomaly of divergence in the upper troposphere and vertical velocity lead to the negative anomaly of SAH. The process whereby negative ozone anomaly lead to the positive anomaly in SAH intensity is opposite to the above mentioned process.
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