Measuring Hydrometeors with a Precipitation Microphysical Characteristics Sensor: Calibration and Field Measurements
Joint Authors
Liu, Xi-chuan
Gao, Tai-chang
Hu, Yuntao
Shu, Xiaojian
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-05-23
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Abstract EN
Aiming at the simultaneous measurement of the size, shape, and fall velocity of precipitation particles in the natural environment, we present here a new ground-based precipitation microphysical characteristics sensor (PMCS) based on the particle imaging velocimetry technology.
The PMCS can capture autocorrelated images of precipitation particles by double-exposure in one frame, by which the size, axis ratio, and fall velocity of precipitation particles can be calculated.
The PMCS is calibrated by a series of glass balls with certain diameters under varying light conditions, and a self-adaptive threshold method is proposed.
The shape, axis ratio, and fall velocity of raindrops were calculated and discussed based on the field measurement results of PMCS.
The typical shape of large raindrop is an oblate ellipsoid, the axis ratio of raindrops decreases linearly with the diameter, the fall velocity of raindrops approaches its asymptote, and the above observed results are in good agreement with the empirical models; the synchronous observation of a PMCS, an OTT PARSIVEL disdrometer, and a rain gauge shows that the PMCS is able to measure the rain intensity, accumulated rainfall, and drop size distribution with high accuracy.
These results have validated the performance of PMCS.
American Psychological Association (APA)
Hu, Yuntao& Liu, Xi-chuan& Gao, Tai-chang& Shu, Xiaojian. 2017. Measuring Hydrometeors with a Precipitation Microphysical Characteristics Sensor: Calibration and Field Measurements. Advances in Meteorology،Vol. 2017, no. 2017, pp.1-16.
https://search.emarefa.net/detail/BIM-1122588
Modern Language Association (MLA)
Hu, Yuntao…[et al.]. Measuring Hydrometeors with a Precipitation Microphysical Characteristics Sensor: Calibration and Field Measurements. Advances in Meteorology No. 2017 (2017), pp.1-16.
https://search.emarefa.net/detail/BIM-1122588
American Medical Association (AMA)
Hu, Yuntao& Liu, Xi-chuan& Gao, Tai-chang& Shu, Xiaojian. Measuring Hydrometeors with a Precipitation Microphysical Characteristics Sensor: Calibration and Field Measurements. Advances in Meteorology. 2017. Vol. 2017, no. 2017, pp.1-16.
https://search.emarefa.net/detail/BIM-1122588
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1122588