CYGNSS Level 3 Ocean Microplastic Concentration Version 3.2

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 Originally made up of a constellation of eight micro-satellites, the observatories provide nearly gap-free Earth coverage using an orbital inclination of approximately 35°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.

Resources

Name Format Description Link
21 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 http://doi.org/10.1109/TGRS.2021.3081691
21 Readme File https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L3/microplastic/README.txt
21 Browse granule search results in Earthdata Search https://search.earthdata.nasa.gov/search/granules?p=C2893924134-POCLOUD
21 Generic Data Readers https://github.com/podaac/data-readers
21 CYGNSS Mission Page at University of Michigan https://cygnss.engin.umich.edu/
33 Algorithm Theoretical Basis Document Level 3 Ocean Microplastic Concentration https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L3/docs/148-0402-2_L3_Microplastic_ATBD.pdf
21 CYGNSS Handbook https://doi.org/10.3998/mpub.12741920
21 PO.DAAC Cookbook https://podaac.github.io/tutorials/
21 HTTPS endpoint for data browse and download https://cmr.earthdata.nasa.gov/virtual-directory/collections/C2893924134-POCLOUD
22 Thumbnail https://podaac.jpl.nasa.gov/Podaac/thumbnails/CYGNSS_L3_MICROPLASTIC_V1.1.jpg
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.5067%2FCYGNS-L3P32
21 Data Use and Citation Policy https://podaac.jpl.nasa.gov/CitingPODAAC
21 Microplastic V3.2 netCDF Data Dictionary https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/cygnss/open/L3/docs/148-0401-4_L3_Microplastic_netCDF_Data_Dictionary.xlsx

Tags

  • oceans
  • water-quality
  • earth-science

Topics

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