Article Title: Summer marine fog distribution in the Chukchi–Beaufort Seas Journal: Earth & Space Science, AGU Publications Article DOI: 10.1029/2021EA002049 Dataset DOI: 10.6086/D1P40N Li Yi Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Physical Oceanography, Ocean University of China, Qingdao, China. King-Fai Li Department of Environmental Sciences, University of California, Riverside, California, USA. Xianyao Chen Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Physical Oceanography, Ocean University of China, Qingdao, China. Ka-Kit Tung Department of Applied Mathematics, University of Washington, Seattle, Washington, USA. Contents of this file YiEtAl2022_ESS_Supp_XuelongData_2016.txt YiEtAl2022_ESS_Supp_XuelongData_2017.txt YiEtAl2022_ESS_Supp_XuelongData_2018.txt YiEtAl2022_ESS_Supp_XuelongData_2020.txt (The above materials are provided in separate files.) Introduction This Supporting Information provide the Xuelong in-situ data shown in Figure 1 of the main text in the format of ASCII files. Each ASCII file contains the measurements of temperature, relative humidity, and visibility during the expedition in one of the calendar years: 2016, 2017, 2018, or 2020. Each ASCII file has 10 columns: [1] Year [2] Month [3] Day [4] Hour (UTC) [5] Minute [6] Latitude (degree N) [7] Longitude (degree E) [8] Temperature (degree C) [9] Relative humidity (%) [10] Visibility (m) YiEtAl2022_ESS_Supp_XuelongData_2016.txt. This ASCII file contains the measurements of temperature, relative humidity, and visibility during the expedition in the summer of 2016. YiEtAl2022_ESS_Supp_XuelongData_2017.txt. This ASCII file contains the measurements of temperature, relative humidity, and visibility during the expedition in the summer of 2017. YiEtAl2022_ESS_Supp_XuelongData_2018.txt. This ASCII file contains the measurements of temperature, relative humidity, and visibility during the expedition in the summer of 2018. YiEtAl2022_ESS_Supp_XuelongData_2020.txt. This ASCII file contains the measurements of temperature, relative humidity, and visibility during the expedition in the summer of 2020.