abarciauskas-bgse
commented
2 years ago Notes on Sea Ice Extent:
- Earthdata search returns 6 collections for the "GCOM-W" project https://search.earthdata.nasa.gov/search?fpj=GCOM-W&as[project][0]=GCOM-W but none of them appear to be sea ice products (all appear to be soil moisture).
- The Ice Mapping System provides data in GeoTIFF from multiple sensors (including GCOM-W) for the northern hemisphere daily, for 1km and 24km grids from 1997 to present. Generated by US National Ice Center. Seems like data is housed with NOAA (Instructions for accessing the data: https://nsidc.org/support/64231694-FTP-Client-Data-Access). More information: https://nsidc.org/data/g02156/versions/1/documentation
Ice sheet
- IceSAT-2 (ATL06 v005) appears to be the only data source that exactly overlaps between the data pathfinders and cryospheric datasets. But this dataset would probably be better represented as points than geotiffs. Global extent but only produced since October 2018.
- Is there a Planet Ice Sheet product? It seems like it's only been used in combination with sentinel and ICESat-2 data to produce ice sheet data, looking at https://www.planet.com/pulse/nasa-researchers-use-planet-data-to-study-the-effects-of-climate-change-on-our-cryosphere/
- Seems like sentinel-3 altimetry data is best for monitoring sea ice https://sentinels.copernicus.eu/web/sentinel/user-guides/sentinel-3-altimetry/applications/ice-and-sea-ice
Questions:
- Does Planet data make sense?
- Should we consider the IMS product since it covers GCOM-W? Or is there another data source?
- Should we be focused just on the arctic and antarctic regions? Will the story on the cryopshere be focused on specific glacial areas?
- Would we access sentinel data through copernicus?
The data pathfinders page on sea level change includes a section on "Find Glaciers and Ice Sheet Data"
- The first 3 links to data are for "The GRACE and GRACE-FO Ocean, Ice, and Hydrology Equivalent Water Height dataset", I don't really understand these products. They seem like anomalies relative to a mean (in April 2002?), for example: https://search.earthdata.nasa.gov/search?q=TELLUS_GRAC-GRFO_MASCON_CRI
- Further down the page it mostly refers to ICESat, ICESat-2 and IceBridge products. https://earthdata.nasa.gov/learn/pathfinders/sea-level-change
Proposal:
- For first delivery include OMG Glacial Elevations data since it is listed on data pathfinders and / or IMS data since it has greater extent and includes GCOM-W
- For latter deliveries, investigate adding sentinel products (how to access data) and ICE* products as point clouds (cloud-optimized options for visualizing point clouds).
Direction given in Trilateral Dataset list