Development of a new visibility parameterization based on the measurement of fog microphysics at a mountain site in Korea

Jae In Song, Seong Soo Yum, Ismail Gultepe, Ki Ho Chang, Byung Gon Kim

Research output: Contribution to journalArticle

Abstract

Fog (cloud) and drizzle microphysics were measured from July 2015 to September 2016 at the Cloud Physics Observation Site (CPOS), located at a mountainous region in Korea. In total 110 cloud/fog events were observed during this period. In detail, fogs at various stages, i.e., newly generated, developing, or dissipating stage were observed, along with some advected clouds with or without precipitation. Based on elaborate analyses of these extensive observation data, we propose a new visibility parameterization method. First, we compare previously developed visibility parameterization methods. Second, we propose a new visibility parameterization method that can be applied to typical fog and fog with precipitation. Uniquely to this new parameterization, the effective fog (cloud) droplet diameter data are utilized, along with liquid water content and droplet concentration that were utilized in previous studies. Third, we validate the accuracies of the previous and newly proposed visibility parameterization methods. The newly proposed visibility parameterization method is the most accurate (with a critical success index of 0.76), and it exhibits better performance than the direct Mie calculation method regardless of the values of effective droplet diameter.

Original languageEnglish
Pages (from-to)115-126
Number of pages12
JournalAtmospheric Research
Volume229
DOIs
Publication statusPublished - 2019 Nov 15

Fingerprint

fog
visibility
parameterization
mountain
droplet
drizzle
cloud droplet
physics
water content
method
liquid

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

Cite this

@article{4ee749cc3a4f49cc8419ed02dda11d4a,
title = "Development of a new visibility parameterization based on the measurement of fog microphysics at a mountain site in Korea",
abstract = "Fog (cloud) and drizzle microphysics were measured from July 2015 to September 2016 at the Cloud Physics Observation Site (CPOS), located at a mountainous region in Korea. In total 110 cloud/fog events were observed during this period. In detail, fogs at various stages, i.e., newly generated, developing, or dissipating stage were observed, along with some advected clouds with or without precipitation. Based on elaborate analyses of these extensive observation data, we propose a new visibility parameterization method. First, we compare previously developed visibility parameterization methods. Second, we propose a new visibility parameterization method that can be applied to typical fog and fog with precipitation. Uniquely to this new parameterization, the effective fog (cloud) droplet diameter data are utilized, along with liquid water content and droplet concentration that were utilized in previous studies. Third, we validate the accuracies of the previous and newly proposed visibility parameterization methods. The newly proposed visibility parameterization method is the most accurate (with a critical success index of 0.76), and it exhibits better performance than the direct Mie calculation method regardless of the values of effective droplet diameter.",
author = "Song, {Jae In} and Yum, {Seong Soo} and Ismail Gultepe and Chang, {Ki Ho} and Kim, {Byung Gon}",
year = "2019",
month = "11",
day = "15",
doi = "10.1016/j.atmosres.2019.06.011",
language = "English",
volume = "229",
pages = "115--126",
journal = "Atmospheric Research",
issn = "0169-8095",
publisher = "Elsevier BV",

}

Development of a new visibility parameterization based on the measurement of fog microphysics at a mountain site in Korea. / Song, Jae In; Yum, Seong Soo; Gultepe, Ismail; Chang, Ki Ho; Kim, Byung Gon.

In: Atmospheric Research, Vol. 229, 15.11.2019, p. 115-126.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Development of a new visibility parameterization based on the measurement of fog microphysics at a mountain site in Korea

AU - Song, Jae In

AU - Yum, Seong Soo

AU - Gultepe, Ismail

AU - Chang, Ki Ho

AU - Kim, Byung Gon

PY - 2019/11/15

Y1 - 2019/11/15

N2 - Fog (cloud) and drizzle microphysics were measured from July 2015 to September 2016 at the Cloud Physics Observation Site (CPOS), located at a mountainous region in Korea. In total 110 cloud/fog events were observed during this period. In detail, fogs at various stages, i.e., newly generated, developing, or dissipating stage were observed, along with some advected clouds with or without precipitation. Based on elaborate analyses of these extensive observation data, we propose a new visibility parameterization method. First, we compare previously developed visibility parameterization methods. Second, we propose a new visibility parameterization method that can be applied to typical fog and fog with precipitation. Uniquely to this new parameterization, the effective fog (cloud) droplet diameter data are utilized, along with liquid water content and droplet concentration that were utilized in previous studies. Third, we validate the accuracies of the previous and newly proposed visibility parameterization methods. The newly proposed visibility parameterization method is the most accurate (with a critical success index of 0.76), and it exhibits better performance than the direct Mie calculation method regardless of the values of effective droplet diameter.

AB - Fog (cloud) and drizzle microphysics were measured from July 2015 to September 2016 at the Cloud Physics Observation Site (CPOS), located at a mountainous region in Korea. In total 110 cloud/fog events were observed during this period. In detail, fogs at various stages, i.e., newly generated, developing, or dissipating stage were observed, along with some advected clouds with or without precipitation. Based on elaborate analyses of these extensive observation data, we propose a new visibility parameterization method. First, we compare previously developed visibility parameterization methods. Second, we propose a new visibility parameterization method that can be applied to typical fog and fog with precipitation. Uniquely to this new parameterization, the effective fog (cloud) droplet diameter data are utilized, along with liquid water content and droplet concentration that were utilized in previous studies. Third, we validate the accuracies of the previous and newly proposed visibility parameterization methods. The newly proposed visibility parameterization method is the most accurate (with a critical success index of 0.76), and it exhibits better performance than the direct Mie calculation method regardless of the values of effective droplet diameter.

UR - http://www.scopus.com/inward/record.url?scp=85068129354&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85068129354&partnerID=8YFLogxK

U2 - 10.1016/j.atmosres.2019.06.011

DO - 10.1016/j.atmosres.2019.06.011

M3 - Article

VL - 229

SP - 115

EP - 126

JO - Atmospheric Research

JF - Atmospheric Research

SN - 0169-8095

ER -