SPURS-2 shipboard disdrometer data for the E. Tropical Pacific field campaign
(SPURS2_DISDR)| Version | 1.0 |
| Processing Level | 2 |
| Start/Stop Date | 2016-Aug-11 to 2017-Nov-17 |
| Short Name | SPURS2_DISDR |
| Description | The SPURS-2 raindrop ODM-470 disdrometer dataset was collected from the ship during both the 2016 and 2017 cruises. Please see file global attributes and Klepp et al. (2015, 2018) for information on the disdrometer: http://dx.doi.org/10.1016/j.atmosres.2014.12.014 , https://doi.org/10.1038/sdata.2018.122 . As explained in the references and global attributes, small drops that cause voltage drops < 0.12 V (i.e. drops with diameters < 0.44 mm) cannot be distinguished from noise by this instrument, and are thus missed. This undercounting of small drops cannot be corrected, and prevents accurate estimation of DSD parameters such as Nw, D0, Dm with any confidence or precision since the minimum detectable drop size is close to the median drop size of tropical oceanic rain (Thompson et al. 2015, https://doi.org/10.1175/JAS-D-14-0206.1). Nonetheless, this dataset provides estimates of drop counts as a function of drop size for the remaining rain drops > 0.44 mm in diameter, and their associated rain rates and liquid water contents. The SPURS (Salinity Processes in the Upper Ocean Regional Study) project is a NASA-funded oceanographic process study and associated field program that aims to elucidate key mechanisms responsible for near-surface salinity variations in the oceans. |
| DOI | 10.5067/SPUR2-DISDR |
| Measurement | OCEANS > PRECIPITATION > LIQUID PRECIPITATION |
| Platform/Sensor | Ships / Platform Name: (Ships) Inclination Angle: 0.0 degrees RADAR SENSOR Name: Radio Detection and Ranging (RADAR) |
| Project | NASA Salinity Processes in the Upper Ocean Regional Study (SPURS) |
| Data Provider | Publisher: SPURS Data Management PI, Fred Bingham Creator: Elizabeth J. Thompson, Haonan Chen, Kyla Drushka Release Place: PO.DAAC Release Date: 2019-Oct-24 Resource: http://podaac.jpl.nasa.gov/SPURS |
| Format | netCDF-4 |
| Keyword(s) | trajectory profile, Upper Ocean, SPURS2, Eastern Tropical Pacific, ITCZ region, Cruises, Revelle, insitu, SPURS, oceanographic campaign, rain rate, disdrometer |
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Resolution Spatial Resolution: 1 Meters x 1 Meters Temporal Resolution: Hourly - < Daily Coverage North Bounding Coordinate: 24.204 degrees South Bounding Coordinate: 5.055 degrees West Bounding Coordinate: -144.783 degrees East Bounding Coordinate: -119.886 degrees Time Span: 2016-Aug-11 to 2017-Nov-17 Projection Ellipsoid: WGS 84 |
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| Available for access in-region with AWS Cloud | |
Region | |
| us-west-2 | |
| podaac-ops-cumulus-protected/SPURS2_DISDR/ | |
| podaac-ops-cumulus-public/SPURS2_DISDR/ | |
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| Name | Long Name | Unit |
|---|---|---|
| bin_nums | bin numbers | counts |
| D | diameter associated with bin centerpoint | mm |
| dD | bin widths | mm |
| Dmax | max drop diameter | mm |
| Dmax_i | max drop diameter bin number | 1 |
| edges | bin edges | mm |
| mass | mass per bin | kg |
| Nd | N of D drop density meaning count per size bin per volume | mm^-1 m^-3 |
| nd | n of D drop concentration meaning count per size bin | m^-3 |
| ndrops | drop count in each bin | drop count in each bin |
| nsumdrops | drop count in all bins | drop count in all bins |
| P | rain rate | mm hr^-1 |
| Pd | rain rate per bin | mm hr^-1 |
| Pfortran | rain rate fortran | mm hr^-1 |
| time | time | seconds since 2016-01-01T00:00:00Z |
| urel_anem | relative wind speed at disdro from cup anemometer | m s^-1 |
| vfall | fall speed per bin | m s^-1 |
| voltage | voltage | volts |
| W | liquid water content | g m^-3 |
| Wd | liquid water content per bin | g m^-3 |
| Z | radar reflectivity factor logarithmic | dBZ |
| z | radar reflectvity factor linear | mm^6 m^-3 |
| Zd | radar reflectivity factor logarithmic per bin | dBZ |
| zd | radar reflectvity factor linear per bin | mm^6 m^-3 |
| DATA CITATION GUIDELINES | |
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| GENERAL DOCUMENTATION | |
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| DATA RECIPE | |
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Citation is critically important for dataset documentation and discovery. Please cite the data as follows, and cite the reference papers when it is appropriate.
| Citation | Elizabeth J. Thompson, Haonan Chen, Kyla Drushka. 2019. SPURS-2 Disdrometer data for the E. Tropical Pacific field campaign. Ver. 1.0. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/SPUR2-DISDR
For more information see Data Citations and Acknowledgments.
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| Journal Reference | Christian Klepp. 2015. The oceanic shipboard precipitation measurement network for surface validation — OceanRAIN, Atmospheric Research, 163. https://doi.org/10.1016/j.atmosres.2014.12.014 Christian Klepp, Simon Michel, Alain Protat, Jörg Burdanowitz, Nicole Albern, Marvin Kähnert, Andrea Dahl, Valentin Louf, Stephan Bakan, and Stefan A. Buehler. 2018. OceanRAIN, a new in-situ shipboard global ocean surface-reference dataset of all water cycle components, Nature. https://doi.org/10.1038/sdata.2018.122 |
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