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| 題名: | The relation between humidity and liquid water content in fog: An experimental approach |
| 作者: | 柯奧圖;Gonser, Stefan Georg;Klemm, Otto;Griessbaum, Frank;Chang, Shih-Chieh;Chu, Hou-Sen;Hsia, Yue-Joe |
| 貢獻者: | 地球科學學院大氣科學學系 |
| 關鍵詞: | Absolute humidity;Air temperature;Applied geophysics;Cloud forests;Clouds;Coalescence;Condensing;Droplets;Earth and Environmental Science;Earth Sciences;Earth, ocean, space;Engineering and environment geology. Geothermics;Exact sciences and technology;Fog;Geophysics;Geophysics/Geodesy;Humidity;Internal geophysics;Liquids;Mountains;Natural hazards: prediction, damages, etc;Physics;Relative humidity;Statistical analysis;Water;Water content;Wind speed |
| 日期: | 2012-05-01 |
| 上傳時間: | 2026-04-21 13:35:38 (UTC+8) |
| 出版者: | Birkhauser Verlag Basel;Basel: SP Birkh�user Verlag Basel |
| 摘要: | 摘要： Microphysical measurements of orographic fog were performed above a montane cloud forest in northeastern Taiwan (Chilan mountain site). The measured parameters include droplet size distribution (DSD), absolute humidity (AH), relative humidity (RH), air temperature, wind speed and direction, visibility, and solar short wave radiation. The scope of this work was to study the short term variations of DSD, temperature, and RH, with a temporal resolution of 3 Hz. The results show that orographic fog is randomly composed of various air volumes that are intrinsically rather homogeneous, but exhibit clear differences between each other with respect to their size, RH, LWC, and DSD. Three general types of air volumes have been identified via the recorded DSD. A statistical analysis of the characteristics of these volumes yielded large variabilities in persistence, RH, and LWC. Further, the data revealed an inverse relation between RH and LWC. In principle, this finding can be explained by the condensational growth theory for droplets containing soluble or insoluble material. Droplets with greater diameters can exist at lower ambient RH than smaller ones. However, condensational growth alone is not capable to explain the large observed differences in DSD and RH because the respective growth speeds are too slow to explain the observed phenomena. Other mechanisms play key roles as well. Possible processes leading to the large observed differences in RH and DSD include turbulence induced collision and coalescence, and heterogeneous mixing. More analyses including fog droplet chemistry and dynamic microphysical modeling are required to further study these processes. To our knowledge, this is the first experimental field observation of the anti-correlation between RH and LWC in fog.
其他題名： Pure Appl. Geophys
出版者： Basel: SP Birkhäuser Verlag Basel
出版日期： 2012-05-01
出處： Pure and applied geophysics, 2012-05, Vol.169 (5-6), p.821-833
資源來源： Springer Nature Link
版權： Springer Basel AG 2011
版權： 2015 INIST-CNRS
版權： Springer Basel AG 2012
識別號： ISSN: 0033-4553
識別號： EISSN: 1420-9136
識別號： DOI: 10.1007/s00024-011-0270-x
識別號： CODEN: PAGYAV |
| 顯示於類別: | [大氣科學學系] 期刊論文
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