CYGNSS Level 3 Ocean Microplastic Concentration Version 3.2
(CYGNSS_L3_MICROPLASTIC_V3.2)| Version | 3.2 |
| Processing Level | 3 |
| Start/Stop Date | 2018-Aug-01 to Present |
| Short Name | CYGNSS_L3_MICROPLASTIC_V3.2 |
| Description | The CYGNSS L3 Ocean Microplastic Concentration V3.2 dataset is provided by the CYGNSS Science Team of the University of Michigan.
CYGNSS was launched on 15 December 2016, it is a NASA Earth System Science Pathfinder Mission that was launched with the purpose of collecting the first frequent space‐based measurements of surface wind speeds in the inner core of tropical cyclones. Originally made up of a constellation of eight micro-satellites, the observatories provide nearly gap-free Earth coverage using an orbital inclination of approximately 35° from the equator, with a mean (i.e., average) revisit time of seven hours and a median revisit time of three hours.
This dataset contains the version 3.2 CYGNSS Level 3 ocean microplastic concentration data record, which provides daily netCDF files, each file containing a gridded map of microplastic number density (#/km^2). Microplastic concentration number density is indirectly estimated by an empirical relationship between ocean surface roughness and wind speed (Evans and Ruf, 2021). User caution is advised in regions containing independent, non-correlative factors affecting ocean surface roughness, such as anomalous atmospheric conditions within the Intertropical Convergence Zone, biogenic surfactants (such as algal blooms), oil spills, etc. This product reports microplastic concentration on a daily temporal and 0.25-degree latitude/longitude spatial grid with 30-day, 1 degree latitude/longitude feature resolution, as constrained by the binning and spatial temporal averaging of the Mean Square Slope (MSS) anomaly (i.e., difference between measured and predicted ocean surface roughness for a given wind speed). Version 3.2 uses CYGNSS MSS measurements that are derived from updated v3.2 Level 1 scattering cross section data and has updated the parameterizations in the data processing algorithm to use v3.2 data correctly. |
| DOI | 10.5067/CYGNS-L3P32 |
| Measurement | OCEANS > WATER QUALITY > SEA SURFACE CONTAMINANTS |
| Platform/Sensor | CYGNSS / Platform Name: Cyclone Global Navigation Satellite System (CYGNSS) Orbit Period: 94.0 minutes Inclination Angle: 35.0 degrees DDMI SENSOR Name: Delay Doppler Mapping Instrument (DDMI) Swath Width: 25.0 kilometers Description: Spacecraft angular distance from orbital plane relative to the Equator. |
| Project | Cyclone Global Navigation Satellite System (CYGNSS) |
| Data Provider | Publisher: PO.DAAC Creator: CYGNSS Release Place: PO.DAAC Release Date: 2024-Jun-28 Resource: https://cygnss.engin.umich.edu/ |
| Format | netCDF-4 |
| Keyword(s) | cygnss, ddm, ddmi, doppler, delay doppler, delay, specular point, wind, winds, wind speed, microplastic, sea surface contaminants, water quality, version 3.2, v3.2 |
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Resolution Spatial Resolution: 0.25 Decimal Degrees x 0.25 Decimal Degrees Temporal Resolution: Daily - < Weekly Coverage Region: GLOBAL Region: TROPICS North Bounding Coordinate: 37.4 degrees South Bounding Coordinate: -37.4 degrees West Bounding Coordinate: -180 degrees East Bounding Coordinate: 180 degrees Time Span: 2018-Aug-01 to Present Granule Time Span: 2017-Mar-18 to 2025-Dec-29 Projection Projection Type: Cylindrical Lat Lon Projection Detail: Geolocation information included for each pixel Ellipsoid: WGS 84 |
| DIRECT ACCESS | |
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| OPENDAP DATA | |
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| This dataset can be downloaded using the podaac-data-subscriber (the recommended tool for bulk downloading PO.DAAC data). It is a Python package for downloading one or many files using the command line interface. The URL redirects to the data-subscriber home page with instructions for utilizing the tool | |
| DIRECT S3-ACCESS | |
| Available for access in-region with AWS Cloud | |
Region | |
| us-west-2 | |
| podaac-ops-cumulus-protected/CYGNSS_L3_MICROPLASTIC_V3.2/ | |
| podaac-ops-cumulus-public/CYGNSS_L3_MICROPLASTIC_V3.2/ | |
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| Name | Long Name | Unit |
|---|---|---|
| lat | latitude | degrees_north |
| lon | longitude | degrees_east |
| mp_concentration | Microplastic Concentration | count km-2 |
| num_mp_samples | Number of microplastic concentration samples within spatiotemporal bin | 1 |
| stddev_mp_samples | Geometric standard deviation of microplastic concentration samples within spatiotemporal bin | 1 |
| time | time | days since 1970-01-01 00:00:00 UTC |
| DATA CITATION GUIDELINES | |
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| READ-ME | |
| USER'S GUIDE | |
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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 | CYGNSS. 2024. CYGNSS Level 3 Microplastic Concentration Retrievals Version 3.2. Ver. 3.2. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/CYGNS-L3P32
For more information see Data Citations and Acknowledgments.
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| Journal Reference | Evans M. C., and Ruf C. S.. 2021. Toward the Detection and Imaging of Ocean Microplastics with a Spaceborne Radar, IEEE Transactions on Geoscience and Remote Sensing. https://doi.org//10.1109/TGRS.2021.3081691 |
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