Long-term ozone variability in the vertical structure and integrated column over the North China Plain: results based on ozonesonde and Dobson measurements during 2001-2019
Long-term ozone variability in the vertical structure and integrated column over the North China Plain: results based on ozonesonde and Dobson measurements during 2001-2019
复制标题
华北平原臭氧垂直结构和综合柱的长期变化：基于2001-2019年臭氧探空仪和多布森测量的结果
DOI：
10.1088/1748-9326/ac109f
复制
发表时间：
2021
影响因子：
6.7
通讯作者：
Lu Daren
中科院分区：
文献类型：
--
作者：
Zhang Jinqiang;Li Dan;Bian Jianchun;Xuan Yuejian;Chen Hongbin;Bai Zhixuan;Wan Xiaowei;Zheng Xiangdong;Xia Xiangao;Lu Daren
2001年3月至2019年2月，在北京定期进行臭氧探空仪发射，以生成独特的中国大陆长期（18年）垂直臭氧剖面图数据集。本研究首次利用整个臭氧探空数据产品，阐明了这18年来不同时间尺度上的臭氧垂直结构。此外，通过对比北京市区臭氧探测仪和香河郊区Dobson臭氧谱仪的数据，探讨了华北平原综合臭氧柱的长期变化。结果表明，垂直臭氧具有明显的月变化特征，暖季对流层臭氧值高，冷季平流层臭氧值高。平流层入侵频繁发生在春季，并有效地将具有高臭氧的冷气团从平流层下层向下输送到对流层上层。垂直臭氧分布揭示了对流层下层和平流层富臭氧区明显的年际变化。从臭氧探空仪和Dobson反演的综合总臭氧柱具有密切的相似性，并表现出强烈的正弦月变化。在对流层和边界层，2001-2012年北京地区综合臭氧柱呈显著的正趋势；在2011年至2013年期间突然下降，随后在2013年实施清洁空气行动计划后出现缓慢而微不足道的增长。
Ozonesonde launches were routinely performed in Beijing from March 2001 to February 2019 to generate a unique long-term (18 years) vertical ozone profile dataset over mainland China. This study elucidates the vertical ozone structure on various temporal scales during this 18 years period by using the entire ozonesonde data product for the first time. Moreover, the long-term variability in the integrated ozone column over the North China Plain (NCP) is also explored by comparing the retrievals from ozonesonde at the Beijing urban site and a Dobson ozone spectrometer at the Xianghe suburban site. Our results indicate that vertical ozone exhibited clear monthly variability characterized by high values of tropospheric ozone during warm seasons and high values of stratospheric ozone during cold seasons. Stratospheric intrusions frequently occurred during spring and effectively transported cold air masses with high ozone from the lower stratosphere downward into the upper troposphere. Evident interannual variability in the lower troposphere and in ozone-rich areas of the stratosphere was revealed by vertical ozone distributions. The integrated total ozone columns retrieved from ozonesonde and Dobson bear close resemblance and exhibit strong sinusoidal monthly variations. In the troposphere and boundary layer, the integrated ozone column presented a significant positive trend during 2001–2012 in Beijing; a sudden decline occurred between 2011 and 2013, which was followed by a slow and insignificant increase after the implementation of the Clean Air Action plan in 2013 on the NCP.