Investigation of the Atmospheric Boundary Layer Height Using Radio Occultation: A Case Study during Twelve Super Typhoons over the Northwest Pacific

This study investigated the relationship between variations in the atmospheric boundary layer height (ABLH) and typhoons over the Northwest Pacific using global navigation satellite system (GNSS) radio occultation (RO) data during the local summer typhoon season (July–October in the Northern Hemisph...

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Autores principales:	Jiaqi Shi, Kefei Zhang, Suqin Wu, Shuangshuang Shi, Zhen Shen
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	COSMIC COSMIC-2 GNSS RO typhoon track atmospheric boundary layer height Meteorology. Climatology QC851-999
Acceso en línea:	https://doaj.org/article/d84b68d8b142487aa90367f12de46117
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spelling	oai:doaj.org-article:d84b68d8b142487aa90367f12de461172021-11-25T16:45:00ZInvestigation of the Atmospheric Boundary Layer Height Using Radio Occultation: A Case Study during Twelve Super Typhoons over the Northwest Pacific10.3390/atmos121114572073-4433https://doaj.org/article/d84b68d8b142487aa90367f12de461172021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4433/12/11/1457https://doaj.org/toc/2073-4433This study investigated the relationship between variations in the atmospheric boundary layer height (ABLH) and typhoons over the Northwest Pacific using global navigation satellite system (GNSS) radio occultation (RO) data during the local summer typhoon season (July–October in the Northern Hemisphere) from 2007 to 2020. The minimum gradient of refractivity derived from COSMIC and COSMIC-2 was used to determine the ABLH. The RO profiles were co-located with the position of a typhoon track base within a 600 km space window and different time windows. ABLH climatology with a 2.5° × 2.5° horizontal resolution was developed, which can be used to obtain the interpolated mean ABLH at any target position. The mean ABLH at the central typhoon position in a specific year was compared with the results interpolated from the climatology of the same location (excluding the year in which the investigated typhoon occurred). In this paper, the results indicate that the ABLH is lower in the vicinity of typhoons relative to the undisturbed atmosphere by a significant amount, and that the reduction in ABLH ranges from 0.13 km to 0.39 km. It was also found that the ABLH was negatively correlated with wind speed, and that the mean correlation coefficient was −0.607. Moreover, similar results can be obtained via the RO water vapor partial pressure profile compared to the refractivity results.Jiaqi ShiKefei ZhangSuqin WuShuangshuang ShiZhen ShenMDPI AGarticleCOSMICCOSMIC-2GNSS ROtyphoon trackatmospheric boundary layer heightMeteorology. ClimatologyQC851-999ENAtmosphere, Vol 12, Iss 1457, p 1457 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	COSMIC COSMIC-2 GNSS RO typhoon track atmospheric boundary layer height Meteorology. Climatology QC851-999
spellingShingle	COSMIC COSMIC-2 GNSS RO typhoon track atmospheric boundary layer height Meteorology. Climatology QC851-999 Jiaqi Shi Kefei Zhang Suqin Wu Shuangshuang Shi Zhen Shen Investigation of the Atmospheric Boundary Layer Height Using Radio Occultation: A Case Study during Twelve Super Typhoons over the Northwest Pacific
description	This study investigated the relationship between variations in the atmospheric boundary layer height (ABLH) and typhoons over the Northwest Pacific using global navigation satellite system (GNSS) radio occultation (RO) data during the local summer typhoon season (July–October in the Northern Hemisphere) from 2007 to 2020. The minimum gradient of refractivity derived from COSMIC and COSMIC-2 was used to determine the ABLH. The RO profiles were co-located with the position of a typhoon track base within a 600 km space window and different time windows. ABLH climatology with a 2.5° × 2.5° horizontal resolution was developed, which can be used to obtain the interpolated mean ABLH at any target position. The mean ABLH at the central typhoon position in a specific year was compared with the results interpolated from the climatology of the same location (excluding the year in which the investigated typhoon occurred). In this paper, the results indicate that the ABLH is lower in the vicinity of typhoons relative to the undisturbed atmosphere by a significant amount, and that the reduction in ABLH ranges from 0.13 km to 0.39 km. It was also found that the ABLH was negatively correlated with wind speed, and that the mean correlation coefficient was −0.607. Moreover, similar results can be obtained via the RO water vapor partial pressure profile compared to the refractivity results.
format	article
author	Jiaqi Shi Kefei Zhang Suqin Wu Shuangshuang Shi Zhen Shen
author_facet	Jiaqi Shi Kefei Zhang Suqin Wu Shuangshuang Shi Zhen Shen
author_sort	Jiaqi Shi
title	Investigation of the Atmospheric Boundary Layer Height Using Radio Occultation: A Case Study during Twelve Super Typhoons over the Northwest Pacific
title_short	Investigation of the Atmospheric Boundary Layer Height Using Radio Occultation: A Case Study during Twelve Super Typhoons over the Northwest Pacific
title_full	Investigation of the Atmospheric Boundary Layer Height Using Radio Occultation: A Case Study during Twelve Super Typhoons over the Northwest Pacific
title_fullStr	Investigation of the Atmospheric Boundary Layer Height Using Radio Occultation: A Case Study during Twelve Super Typhoons over the Northwest Pacific
title_full_unstemmed	Investigation of the Atmospheric Boundary Layer Height Using Radio Occultation: A Case Study during Twelve Super Typhoons over the Northwest Pacific
title_sort	investigation of the atmospheric boundary layer height using radio occultation: a case study during twelve super typhoons over the northwest pacific
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/d84b68d8b142487aa90367f12de46117
work_keys_str_mv	AT jiaqishi investigationoftheatmosphericboundarylayerheightusingradiooccultationacasestudyduringtwelvesupertyphoonsoverthenorthwestpacific AT kefeizhang investigationoftheatmosphericboundarylayerheightusingradiooccultationacasestudyduringtwelvesupertyphoonsoverthenorthwestpacific AT suqinwu investigationoftheatmosphericboundarylayerheightusingradiooccultationacasestudyduringtwelvesupertyphoonsoverthenorthwestpacific AT shuangshuangshi investigationoftheatmosphericboundarylayerheightusingradiooccultationacasestudyduringtwelvesupertyphoonsoverthenorthwestpacific AT zhenshen investigationoftheatmosphericboundarylayerheightusingradiooccultationacasestudyduringtwelvesupertyphoonsoverthenorthwestpacific
_version_	1718413046504751104

Investigation of the Atmospheric Boundary Layer Height Using Radio Occultation: A Case Study during Twelve Super Typhoons over the Northwest Pacific

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