辐射雾微结构精细化观测研究
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1.南京信息工程大学;2.南京工业大学;3.南京气象科技创新研究院

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国家自然科学基金项目(41775134,42075063,42075066),广西重点研发计划项目(桂科AB20159013)


High resolution observation of radiation fog microstructure
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1.Nanjing University Of Information Science &technology;2.Nanjing Tech University;3.Nanjing University of Information Science & Technology;4.Nanjing joint institute for atmospheric sciences

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    摘要:

    为研究FM-120雾滴谱仪不同采样频率(5Hz、1Hz)对辐射雾微结构观测的影响,2020年冬季在连云港东海县开展了为期58d的雾外场精细化观测。在2020年12月28日一次辐射雾观测阶段使用5Hz和1Hz两台不同频率的雾滴谱仪进行辐射雾精细化观测研究。研究发现:相较于1Hz的观测结果,5Hz更容易观测到雾微物理量的极值。从整个雾过程来看,5Hz雾滴谱仪平均成1Hz后的结果在雾的生成和消散阶段与1Hz雾滴谱仪的原始结果的相似度较低,在雾的成熟和发展阶段相似度较高。从谱型来看,5Hz和1Hz观测到的谱型基本类似,主要差别出现在峰值。5Hz和1Hz均能反映此次雾过程中不同阶段微物理之间的关系,主要差别出现在雾的生成阶段, 可能为5Hz在此阶段观测到的活化并凝结增长的新雾滴相对较少所导致。

    Abstract:

    To study the differences and similarities between fine observation and conventional observation in fog microstructure, a systematic field observation of fog was conducted and lasted 58 days in Donghai, Lianyungang during the winter of 2020. Two fog monitors with different frequencies (5Hz and 1Hz) were applied simultaneously for measuring a radiation fog on December 28, 2020. Based on this observation, we found that compared with the 1Hz data, the 5Hz measurement observed more extreme values. In terms of the whole fog process, the results of the 5Hz fog droplet spectrometer averaged into 1Hz are less similar to the original results of 1Hz in the fog generation and dissipation stages, and more similar in the fog maturation and development stages. In terms of the spectral patterns, the spectral patterns of 5 Hz and 1 Hz are similar, while the main differences appear at the peak. The measurements of 5 Hz and 1 Hz can both reflect the relationship between the microphysics at different stages of this fog process, and the main differences appear at the fog generation stage. This may be due to the relatively small number of activation and condensation growth of new fog droplets observed at 5Hz at this stage.

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  • 收稿日期:2021-12-29
  • 最后修改日期:2022-02-26
  • 录用日期:2022-03-03
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