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Observational study of the physical and chemical characteristics of the winter radiation fog in the tropical rainforest in Xishuangbanna, China
Wang, Yuan1; Niu, Shengjie1,2; Lu, Chunsong1; Lv, Jingjing1; Zhang, Jing3; Zhang, Hongwei1,4; Zhang, Sirui1; Shao, Naifu1; Sun, Wei1; Jin, Yuchen1; Song, Qinghai3
2021
Source PublicationSCIENCE CHINA-EARTH SCIENCES
ISSN1674-7313
Volume64Issue:11Pages:1982-1995
Abstract

We conducted a three-month field experiment focusing on the physical and chemical characteristics of fog in a tropical rainforest in Xishuangbanna, Southwest China, in the winter of 2019. In general, the fog would form at midnight and persist because of the increased long-wave radiative cooling combined with the high relative humidity, gentle breeze, and a relatively low aerosol number concentration in the forest; the fog would dissipate before noon due to the increasing turbulence near the surface. This diurnal cycle is typical for radiation fog. The microphysical fog properties included a relatively low number concentration of the fog droplet, large droplet size, high liquid water content, narrow droplet number-size distribution, and high supersaturation. The chemical properties showed that the fog water was slightly alkaline with low electrical conductivity, whereas the highest proportions of anions and cations therein were Cl- and Ca2+, respectively; the chemical components were enriched in small fog droplets. In addition, we indirectly calculated the fog supersaturation according to the kappa-Kohler theory. We found that condensation broadens the droplet number-size distribution at relatively low supersaturation, which is positively correlated with the fog-droplet number concentration and negatively correlated with the droplet mean-volume diameter; this affects the key microphysical processes of fog.

KeywordRadiation fog Formation and disappearance mechanisms Physical and chemical characteristics Supersaturation Tropical rainforest
Subject AreaGeology
DOI10.1007/s11430-020-9766-4
Indexed BySCI
Language英语
WOS IDWOS:000702593200002
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/12392
Collection全球变化研究组
Affiliation1.Nanjing Univ Informat Sci & Technol NUIST, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing 210044, Peoples R China
2.Nanjing Univ Informat Sci & Technol NUIST, Key Lab Aerosol Cloud Precipitat China Meteorol A, Nanjing 210044, Peoples R China
3.Nanjing Tech Univ, Coll Safety Sci & Engn, Nanjing 210009, Peoples R China
4.Chinese Acad Sci, Xishuangbanna Trop Bot Garden, Key Lab Trop Forest Ecol TFE, Menglun 666303, Peoples R China
5.Henan Meteorol Observat & Data Ctr, Zhengzhou 450003, Peoples R China
Recommended Citation
GB/T 7714
Wang, Yuan,Niu, Shengjie,Lu, Chunsong,et al. Observational study of the physical and chemical characteristics of the winter radiation fog in the tropical rainforest in Xishuangbanna, China[J]. SCIENCE CHINA-EARTH SCIENCES,2021,64(11):1982-1995.
APA Wang, Yuan.,Niu, Shengjie.,Lu, Chunsong.,Lv, Jingjing.,Zhang, Jing.,...&Song, Qinghai.(2021).Observational study of the physical and chemical characteristics of the winter radiation fog in the tropical rainforest in Xishuangbanna, China.SCIENCE CHINA-EARTH SCIENCES,64(11),1982-1995.
MLA Wang, Yuan,et al."Observational study of the physical and chemical characteristics of the winter radiation fog in the tropical rainforest in Xishuangbanna, China".SCIENCE CHINA-EARTH SCIENCES 64.11(2021):1982-1995.
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