Wind Field Characteristics of the 13 June 2014 Downburst Event in Beijing Based on Meteorological Tower Records
Understanding the characteristics of downburst wind fields is crucial for studying structural resistance to downbursts. Based on measured data from the 325 m meteorological tower in Beijing, this paper investigates the spatiotemporal evolution of mean and fluctuating winds during a non-stationary do...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-12-01
|
| Series: | Atmosphere |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4433/16/1/27 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832589142944382976 |
|---|---|
| author | Shi Zhang Yibo Wang Zengzhi Qian Kexin Guo Xiaoda Xu Daxing Zhou Qing Cao |
| author_facet | Shi Zhang Yibo Wang Zengzhi Qian Kexin Guo Xiaoda Xu Daxing Zhou Qing Cao |
| author_sort | Shi Zhang |
| collection | DOAJ |
| description | Understanding the characteristics of downburst wind fields is crucial for studying structural resistance to downbursts. Based on measured data from the 325 m meteorological tower in Beijing, this paper investigates the spatiotemporal evolution of mean and fluctuating winds during a non-stationary downburst. Key wind field parameters such as the mean wind speed, turbulence intensity, turbulence integral length scale, probability density function, power spectral density, evolutionary power spectral density, and gust factor are statistically analyzed. The results show that the wind speed of downburst undergoes rapid changes, with wind direction significantly influenced by outflow vortices at low altitudes and relatively stable at higher altitudes. When the event happens, the temperature decreases sharply. The mean wind speeds and turbulence integral length scale of the downburst exhibit pronounced “nose-shaped” profile characteristics at the moment when peak wind speed occurs. The turbulence intensity at lower altitudes predominantly exceeds that at higher altitudes. The probability density distribution function of the reduced fluctuating wind speed matches the standard Gaussian distribution curve. The fluctuating wind speeds of the downburst exhibit significant non-stationary characteristics, with their energy mainly distributing in the period of rapid change of wind speed in the time domain and concentrating in the vicinity of 0–0.1 Hz in the frequency domain. The gust factor reaches its maximum at the moment when the peak wind speed occurs. |
| format | Article |
| id | doaj-art-c099ed5045ba4a0db988cb76aeeae89d |
| institution | Kabale University |
| issn | 2073-4433 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj-art-c099ed5045ba4a0db988cb76aeeae89d2025-01-24T13:21:44ZengMDPI AGAtmosphere2073-44332024-12-011612710.3390/atmos16010027Wind Field Characteristics of the 13 June 2014 Downburst Event in Beijing Based on Meteorological Tower RecordsShi Zhang0Yibo Wang1Zengzhi Qian2Kexin Guo3Xiaoda Xu4Daxing Zhou5Qing Cao6School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, ChinaSchool of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, ChinaChina Railway Construction Group Co., Ltd., Beijing 100040, ChinaSchool of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, ChinaCentral Research Institute of Building and Construction Co., Ltd., MCC, Beijing 100088, ChinaChina Railway Construction Group Co., Ltd., Beijing 100040, ChinaChina Railway Construction Group Co., Ltd., Beijing 100040, ChinaUnderstanding the characteristics of downburst wind fields is crucial for studying structural resistance to downbursts. Based on measured data from the 325 m meteorological tower in Beijing, this paper investigates the spatiotemporal evolution of mean and fluctuating winds during a non-stationary downburst. Key wind field parameters such as the mean wind speed, turbulence intensity, turbulence integral length scale, probability density function, power spectral density, evolutionary power spectral density, and gust factor are statistically analyzed. The results show that the wind speed of downburst undergoes rapid changes, with wind direction significantly influenced by outflow vortices at low altitudes and relatively stable at higher altitudes. When the event happens, the temperature decreases sharply. The mean wind speeds and turbulence integral length scale of the downburst exhibit pronounced “nose-shaped” profile characteristics at the moment when peak wind speed occurs. The turbulence intensity at lower altitudes predominantly exceeds that at higher altitudes. The probability density distribution function of the reduced fluctuating wind speed matches the standard Gaussian distribution curve. The fluctuating wind speeds of the downburst exhibit significant non-stationary characteristics, with their energy mainly distributing in the period of rapid change of wind speed in the time domain and concentrating in the vicinity of 0–0.1 Hz in the frequency domain. The gust factor reaches its maximum at the moment when the peak wind speed occurs.https://www.mdpi.com/2073-4433/16/1/27downburstfield measurementwind field characteristicsnon-stationaryspatiotemporal evolution characteristics |
| spellingShingle | Shi Zhang Yibo Wang Zengzhi Qian Kexin Guo Xiaoda Xu Daxing Zhou Qing Cao Wind Field Characteristics of the 13 June 2014 Downburst Event in Beijing Based on Meteorological Tower Records Atmosphere downburst field measurement wind field characteristics non-stationary spatiotemporal evolution characteristics |
| title | Wind Field Characteristics of the 13 June 2014 Downburst Event in Beijing Based on Meteorological Tower Records |
| title_full | Wind Field Characteristics of the 13 June 2014 Downburst Event in Beijing Based on Meteorological Tower Records |
| title_fullStr | Wind Field Characteristics of the 13 June 2014 Downburst Event in Beijing Based on Meteorological Tower Records |
| title_full_unstemmed | Wind Field Characteristics of the 13 June 2014 Downburst Event in Beijing Based on Meteorological Tower Records |
| title_short | Wind Field Characteristics of the 13 June 2014 Downburst Event in Beijing Based on Meteorological Tower Records |
| title_sort | wind field characteristics of the 13 june 2014 downburst event in beijing based on meteorological tower records |
| topic | downburst field measurement wind field characteristics non-stationary spatiotemporal evolution characteristics |
| url | https://www.mdpi.com/2073-4433/16/1/27 |
| work_keys_str_mv | AT shizhang windfieldcharacteristicsofthe13june2014downbursteventinbeijingbasedonmeteorologicaltowerrecords AT yibowang windfieldcharacteristicsofthe13june2014downbursteventinbeijingbasedonmeteorologicaltowerrecords AT zengzhiqian windfieldcharacteristicsofthe13june2014downbursteventinbeijingbasedonmeteorologicaltowerrecords AT kexinguo windfieldcharacteristicsofthe13june2014downbursteventinbeijingbasedonmeteorologicaltowerrecords AT xiaodaxu windfieldcharacteristicsofthe13june2014downbursteventinbeijingbasedonmeteorologicaltowerrecords AT daxingzhou windfieldcharacteristicsofthe13june2014downbursteventinbeijingbasedonmeteorologicaltowerrecords AT qingcao windfieldcharacteristicsofthe13june2014downbursteventinbeijingbasedonmeteorologicaltowerrecords |