Tropospheric ozone variability during the East Asian summer monsoon as observed by satellite (IASI), aircraft (MOZAIC) and ground stations
Tropospheric ozone variability during the East Asian summer monsoon as observed by satellite (IASI), aircraft (MOZAIC) and ground stations
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DOI：
10.5194/acp-16-10489-2016
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发表时间：
2015-11
影响因子：
6.3
通讯作者：
S. Safieddine;A. Boynard;N. Hao;F. Huang;Lili Wang;D. Ji;B. Barret;S. Ghude;P. Coheur;
中科院分区：
文献类型：
--
作者：
S. Safieddine;A. Boynard;N. Hao;F. Huang;Lili Wang;D. Ji;B. Barret;S. Ghude;P. Coheur;
热红外大气探测干涉仪 (IASI) 的卫星测量、现役空中客车飞机 (MOZAIC) 的臭氧和水蒸气测量以及地面站的观测数据用于评估东亚夏季风 (EASM) 期间的对流层臭氧 (O3) 变化。六年 [2008-2013] 的 IASI 数据分析表明，该仪器有能力检测季风的开始和进展（反映为 EASM 对流层 [0-6] km O3 柱的减少），并逐年再现这种减少。以2011年5月至8月为例，IASI数据一方面显示对流层[0-6]km O3与云量、相对湿度和风速等气象参数之间存在明显的反比关系。海得拉巴、南京和广州 MOZAIC 项目的飞机数据用于验证 IASI 数据并评估季风对不同地点对流层 O3 垂直分布的影响。结果显示，源自 IASI 和 MOZAIC 的 [0-6] km O3 柱之间的相关系数非常一致，相关系数为 0.74。飞机数据显示对流层氧气减少，这在自由对流层比在边界层更重要，在海得拉巴比在其他两个中国城市更重要。印度和中国不同地点的地面站数据显示，季风期间对气象的时空依赖性，海得拉巴下降幅度高达22 ppbv，华北平原下降幅度高达5 ppbv。
Satellite measurements from the thermal Infrared Atmospheric Sounding Interferometer (IASI), the Measurements of OZone and water vapor by in-service AIrbus airCraft (MOZAIC), as well as observations from ground based stations, are used to assess the tropospheric ozone (O3) variability during the East Asian Summer Monsoon (EASM). Six years [2008-2013] of IASI data analysis reveals the ability of the instrument to detect the onset and the progression of the monsoon reflected by a decrease in the tropospheric [0-6] km O3 column due to the EASM, and to reproduce this decrease from one year to the other. Focusing on the period of May-August 2011, taken as an example year, IASI data show clear inverse relationship between tropospheric [0-6] km O3 on one hand and meteorological parameters such as cloud cover, relative humidity and wind speed, on the other hand. Aircraft data from the MOZAIC project at Hyderabad, Nanjing and Guangzhou are used to validate the IASI data and to assess the effect of the monsoon on the vertical distribution of the tropospheric O3 at different locations. Results show good agreement with a correlation coefficient of 0.74 between the [0-6] km O3 column derived from IASI and MOZAIC. The aircraft data show a decrease in the tropospheric O3 that is more important in the free troposphere than in the boundary layer and at Hyderabad than at the other two Chinese cities. Ground station data at different locations in India and China show a spatiotemporal dependence on meteorology during the monsoon, with decrease up to 22 ppbv in Hyderabad, and up to 5 ppbv in the North China Plain.