Please use this identifier to cite or link to this item:
https://hdl.handle.net/20.500.14279/13641
Title: | Effect of vertical air motion on disdrometer derived Z-R coefficients | Authors: | Michaelides, Silas Lane, John E. Kasparis, Takis |
Major Field of Science: | Natural Sciences;Engineering and Technology | Field Category: | Earth and Related Environmental Sciences;Electrical Engineering - Electronic Engineering - Information Engineering | Keywords: | Drop size distribution;ECMWF;ERA-Interim;Joss-Waldvogel disdrometer;Radiosonde;Reanalysis;Vertical velocity | Issue Date: | 14-Feb-2019 | Source: | Atmosphere, 2019, vol.10, no.2 | Volume: | 10 | Issue: | 2 | Journal: | Atmosphere | Abstract: | For synoptic-scale motions the vertical velocity component is typically of the order of a few centimeters per second. In general, the vertical velocity is not measured directly but must be inferred from other meteorological fields that are measured directly. In the present study, a Joss-Waldvogel disdrometer was used in order to establish the drop size distributions (DSD) at Athalassa, Cyprus. Data from a radiosonde station co-located with the disdrometer were also collected which were subsequently used to derive estimates of vertical velocities. Meteorological fields, including vertical velocities, were extracted from an atmospheric reanalysis, for an area centered over the disdrometer and radiosonde station instrumentation. The disdrometer data were used to determine the Z-R disdrometer derived coefficients, A and b, where Z = A R b . To model the vertical air effect on the Z-R disdrometer derived coefficients an idealistic notion of flux conservation of the DSD is adopted. This adjusted DSD (FCM-DSD) is based on the exponential DSD and is modified by the relationship between drop terminal velocity (D) and vertical air speed w. The FCM-DSD has a similar appearance to the popular gamma DSD for w < 0. A clear segregation is seen in the A-w plane for both data and model. The data points are also clearly segregated in the b-w plane, but the model points are on opposite sides of the w = 0 line. It is also demonstrated that vertical velocities can be extracted from radiosonde data if initial balloon volume is accurately measured, along with an accurate measurement of the mass of the complete radiosonde-balloon system. To accomplish this, vertical velocities from radiosonde data were compared to reanalysis vertical velocity fields. The resulting values of initial balloon volume are found to be within the range of measured values. | ISSN: | 20734433 | DOI: | 10.3390/atmos10020077 | Rights: | © by the authors. | Type: | Article | Affiliation : | The Cyprus Institute Kennedy Space Center Cyprus University of Technology |
Publication Type: | Peer Reviewed |
Appears in Collections: | Άρθρα/Articles |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
atmosphere-10-00077.pdf | Fulltext | 12.91 MB | Adobe PDF | View/Open |
CORE Recommender
SCOPUSTM
Citations
1
checked on Nov 6, 2023
WEB OF SCIENCETM
Citations
1
Last Week
0
0
Last month
0
0
checked on Oct 29, 2023
Page view(s) 50
353
Last Week
0
0
Last month
12
12
checked on Aug 28, 2024
Download(s)
184
checked on Aug 28, 2024
Google ScholarTM
Check
Altmetric
Items in KTISIS are protected by copyright, with all rights reserved, unless otherwise indicated.