Use of Thermal Image Velocimetry to Measure a Dust-Devil-Like Vortex Within a Sports Ground in a Residential Area

Use of Thermal Image Velocimetry to Measure a Dust-Devil-Like Vortex Within a Sports Ground in a Residential Area
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使用热图像测速仪测量住宅区运动场内的尘暴状涡旋

DOI:
10.1007/s10546-021-00674-6
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发表时间:
2021
影响因子:
4.3
通讯作者:
Manabu Kanda
Manabu Kanda
中科院分区:
地球科学3区
文献类型:
--
作者:
Atsushi Inagaki;Manabu Kanda

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用热像测速仪(TIV)在东京的一个运动场上观测到了类尘暴涡旋(DDLV)的特征。热像测速技术提供了对地面附近具有高时空分辨率(即距离S−1数十厘米)的分布式低速飞行器二维速度分布的独特观测。在夏季和冬季分别检测到两个DDLV,并研究了冬季更大、更强的DDLV的数量特征。探测到的DDLV的大小和强度都在过去对沙尘暴的观测和数值模拟中报告的范围内,使用TIV进行了量化。该涡旋出现在55米高的建筑物墙附近的冷空气流边界处,并持续3分钟以上。
We investigate the characteristics of a dust-devil-like vortex (DDLV) observed using thermal image velocimetry (TIV) at a sports ground in Tokyo. Thermal image velocimetry provides unique observations of the two-dimensional velocity distribution for a DDLV with high spatio–temporal resolution (i.e., tens of cm s−1) near the ground. Two DDLVs were detected, one each in summer and winter, and the quantitative features of the larger, stronger DDLV in the winter are examined. The size and strength of the detected DDLV, which are quantified using TIV, are within the ranges reported in past observations and numerical simulations of dust devils. The vortex appears at the boundary of a cold-air current near a 55-m building wall, and persists for more than 3 min.
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DOI: 10.1007/s10546-016-0213-2
发表时间: 2017
影响因子: 4.3
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