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Irradiated Atmospheres. IV. Effect of Mixing Heat Flux on Chemistry

文献类型：期刊论文

作者Zhang, Zhen-Tai9,10,11; Zhong, Wei6; Wang, Wei7; Guo JH(郭建恒)1,4,8; Tan, Xianyu3; Ma, Bo9,10; Wei, Ruyi5; Yu, Cong2,9,10,11
刊名ASTROPHYSICAL JOURNAL
出版日期2025-12-20
卷号995期号:2
ISSN号0004-637X
DOI10.3847/1538-4357/ae1962
产权排序第6完成单位
文献子类Article
英文摘要Vertical mixing disrupts the thermochemical equilibrium and introduces additional heat flux that alters exoplanetary atmospheric temperatures. We investigate how this mixing-induced heat flux affects atmospheric chemistry. Temperature increase in the lower atmosphere by the mixing-induced heat flux alters species abundances there and modifies those in the upper atmosphere through vertical transport. In the lower atmosphere, most species follow thermodynamic equilibrium with temperature changes. In the upper layers, species mixing ratios depend on the positions of quenching levels relative to the regions exhibiting significant mixing-induced temperature variations. When the quenching level resides within such a region (e.g., CO, CH4, and H2O with strong mixing), the mixing ratios in the upper atmosphere are modified due to changes in the quenched ratios affected by the temperature variation in the lower atmosphere. This alters the mixing ratio of other species (e.g., NO and CO2) through the chemical reaction network, whose quenching occurs in the region without much temperature change. The mixing ratios of CH4, H2O, and NH3 decrease in the lower atmosphere with increasing mixing heat flux, similarly reducing these ratios in the upper atmosphere. Conversely, the mixing ratios of CO, CO2, and NO rise in the lower atmosphere, with CO and CO2 also increasing in the upper levels, although NO decreases. Weaker host star irradiation lowers the overall temperature of the planet, allowing a smaller mixing to have a similar effect. We conclude that understanding the vertical mixing heat flux is essential for accurate atmospheric chemistry modeling and retrieval.
学科主题天文学 ; 恒星与银河系
URL标识查看原文
出版地No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND
WOS关键词RELEASE SCIENCE PROGRAM ; CONDENSATION CLOUDS ; DWARF ATMOSPHERES ; CARBON-MONOXIDE ; MASS COMPANION ; EQUILIBRIUM ; JUPITER ; TRANSPORT ; PHOTOCHEMISTRY ; TEMPERATURE
资助项目MOST divided by National Natural Science Foundation of China (NSFC)[12288102]; MOST divided by National Key Research and Development Program of China (NKPs)[2020YFC2201200]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001640151000001
出版者IOP Publishing Ltd
资助机构MOST divided by National Natural Science Foundation of China (NSFC)[12288102] ; MOST divided by National Key Research and Development Program of China (NKPs)[2020YFC2201200]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28800]  
专题云南天文台_恒星物理研究组
通讯作者Yu, Cong
作者单位1.University of CAS, Beijing, People’s Republic of China;
2.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, People’s Republic of China
3.Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 201210, People’s Republic of China;
4.Key Laboratory for the Structure and Evolution of Celestial Objects, CAS, Kunming 650011, People’s Republic of China;
5.Electric Information School, Wuhan University, Wuhan 430072, People’s Republic of China;
6.Institute of Science and Technology for Deep Space Exploration, Nanjing University, Suzhou 215163, People’s Republic of China;
7.CAS Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Datun Road A20, Beijing 100101, People’s Republic of China;
8.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, People’s Republic of China;
9.School of Physics and Astronomy, Sun Yat-Sen University, Zhuhai 519082, People’s Republic of China; yucong@mail.sysu.edu.cn;
10.CSST Science Center for the Guangdong-Hong Kong-Macau Greater Bay Area, Zhuhai 519082, People’s Republic of China;
推荐引用方式
GB/T 7714		 Zhang, Zhen-Tai,Zhong, Wei,Wang, Wei,et al. Irradiated Atmospheres. IV. Effect of Mixing Heat Flux on Chemistry[J]. ASTROPHYSICAL JOURNAL,2025,995(2).
APA Zhang, Zhen-Tai.,Zhong, Wei.,Wang, Wei.,郭建恒.,Tan, Xianyu.,...&Yu, Cong.(2025).Irradiated Atmospheres. IV. Effect of Mixing Heat Flux on Chemistry.ASTROPHYSICAL JOURNAL,995(2).
MLA Zhang, Zhen-Tai,et al."Irradiated Atmospheres. IV. Effect of Mixing Heat Flux on Chemistry".ASTROPHYSICAL JOURNAL 995.2(2025).

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来源：云南天文台

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