|
Data Link:
|
Parsival2 Disdrometer (Laser Disdrometer) Data
|
|
Contact Info:
|
|
Name:
Mary Jane Bartholomew
|
|
Email:
bartholomew@bnl.gov
|
Phone:
(631) 344-2444
|
|
Street:
Bldg 490D
|
City:
Upton
|
|
State:
NY
|
Postal:
11973-5000
|
|
|
Investigator(s):
|
Courtney Schumacher
|
| Related Publications/References: |
|
| Data Format: |
netcdf
|
|
File Naming Convention:
|
standard ARM Program datastream name
|
|
Abstract:
|
The Parsivel2 disdrometer observes precipitation and returns precipitation intensity, drop size distribution, drop fall velocity and precipitation type. From these observations a number of properties of the drop size distribution are derived including volumetric liquid water content, median volume diameter, radar reflectivity factor, and moments of the drop size distribution.
|
|
Purpose:
|
The data have value in the study of precipitation processes and for the calibration of the co-located radar wind profiler.
|
|
Data Usage:
|
Analysis applications used to read the data files will need the capability to read netcdf files.
|
|
Arm Sites:
|
mao
|
|
Content Time Range:
|
Begin:
20140924
End:
n/a
|
|
Instrument(s):
|
Parsivel 2 Laser Disdrometer
|
|
Field Campaign Type:
|
Observations and Modeling of the Green Ocean Amazon: Parsivel2
|
|
Scientific Measurements(s):
|
| Measurement name |
Variables |
|
precipitation drop size distribution
|
|
|
Hydrometeor Size Distribution
|
|
|
Hydrometeor fall velocity
|
|
|
Hydrometeor size
|
|
|
Visibility
|
|
|
| Stratum Keyword(s): |
|
Atmosphere: Boundary Layer
|
|
| Data Quality: |
|
Attribute Accuracy:
|
No formal attribute accuracy tests were conducted
|
|
Positional Accuracy:
|
No formal positional accuracy tests were conducted
|
|
Consistency and Completeness Report:
|
Data set is considered complete for the information presented, as described in the abstract.Users are advised to read the rest of the metadata record carefully for addtional details.
|
|
Factor Affecting the Research:
|
none
|
|
|
Access Restriction:
|
No access constraints are associated with this data.
|
|
Use Restrictions:
|
No use constraints are associated with this data.
|
|
Distribution Info:
|
| Organization Name: |
ARM Archive User Services |
| Email:
armarchive[at]ornl.gov |
Phone:
1-888-ARM-DATA |
| Street:
Oak Ridge National Laboratory |
City:
Oak Ridge |
| State:
Tennessee |
Postal:
37831-6290 |
|
|
Additional Missing Info:
|
The pars2 data files contain two values for S band reflectivity factor. One is calculated by the manufacturer's software and is based upon the observed fall velocities and number drops in each size bin. Because there are acknowledged problems with the observed fall velocities (Tokay et al., 2013), additional values are calculated. These are based upon Lhemitte's published formula (Lhermitte, 2002) for fall velocity as a function of drop size and the number of drops in each size bin.
Lhermitte, R. M., 2002. Centimeter and Millimeter Wavelength Radars in Meteorology. Lhermitte Publcations, p. 550.
Tokay, A., W. A. Petersen, P. Gatlin, M. Wingo, 2013. Comparison of raindrop size distribution measurements by collocated disdrometers. J. Atmos. and Oceanic Technol., v. 30, p. 1672-1690.
http://dx.doi.org/10.1175/JTECH-D-12-00163.1
|
![[ICO]](/icons/blank.gif){kind=icon}
![[PARENTDIR]](/icons/back.gif){kind=icon}
![[TXT]](/icons/text.gif){kind=icon}