dataset Ingest Request for ct-ch4-monthgrid-v2025 #21
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| { | ||
| "collection": "ct-ch4-monthgrid-v2025", | ||
| "title": "CarbonTracker-CH₄ Isotopic Methane Inverse Fluxes v2025", | ||
| "description": "Surface methane (CH₄) emissions are derived from atmospheric measurements of methane and its ¹³C carbon isotope content. Different sources of methane contain different ratios of the two stable isotopologues, ¹²CH₄ and ¹³CH₄. This makes normally indistinguishable collocated sources of methane, say from agriculture and oil and gas exploration, distinguishable. The National Oceanic and Atmospheric Administration (NOAA) collects whole air samples from its global cooperative network of flasks (https://gml.noaa.gov/ccgg/about.html), which are then analyzed for methane and other trace gases. A subset of those flasks are also analyzed for ¹³C of methane in collaboration with the Institute of Arctic and Alpine Research at the University of Colorado Boulder. Scientists at the National Aeronautics and Space Administration (NASA) and NOAA used those measurements of methane and ¹³C of methane in conjunction with a model of atmospheric circulation to estimate emissions of methane separated by three source types: microbial, fossil and pyrogenic. This dataset presents monthly methane emissions in units of grams of methane per square meter per year (g CH₄/m²/year) from microbial, fossil and pyrogenic sources, along with a layer of total methane emissions from all three sources combined, at 1° resolution from 1998 to 2023. The source data can be found at https://doi.org/10.25925/hxks-v755", | ||
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| "license": "CC0-1.0", | ||
| "stac_version": "1.0.0", | ||
| "dashboard:is_periodic": true, | ||
| "dashboard:time_density": "month", | ||
| "spatial_extent": { | ||
| "xmin": -180, | ||
| "ymin": -90, | ||
| "xmax": 180, | ||
| "ymax": 90 | ||
| }, | ||
| "temporal_extent": { | ||
| "startdate": "1998-01-01T00:00:00Z", | ||
| "enddate": "2023-12-31T00:00:00Z" | ||
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| }, | ||
| "discovery_items": [ | ||
| { | ||
| "discovery": "s3", | ||
| "prefix": "ct-ch4-monthgrid-v2025/", | ||
| "bucket": "ghgc-data-store", | ||
| "filename_regex": ".*methane_emis_.*.tif$", | ||
| "id_regex": ".*_(.*).tif$", | ||
| "id_template": "ct-ch4-monthgrid-v2025-{}", | ||
| "use_multithreading": false, | ||
| "assets": { | ||
| "fossil": { | ||
| "description": "Emission of methane from all fossil sources, such as oil and gas activities and coal mining.", | ||
| "regex": ".*methane_emis_fossil.*.tif$", | ||
| "title": "Fossil CH₄ Emission" | ||
| }, | ||
| "microbial": { | ||
| "description": "Emission of methane from all microbial sources, such as wetlands, agriculture and termites.", | ||
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| "regex": ".*methane_emis_microbial.*.tif$", | ||
| "title": "Microbial CH₄ Emission" | ||
| }, | ||
| "pyrogenic": { | ||
| "description": "Emission of methane from all sources of biomass burning, such as wildfires and crop residue burning.", | ||
| "regex": ".*methane_emis_pyrogenic.*.tif$", | ||
| "title": "Pyrogenic CH₄ Emission" | ||
| }, | ||
| "total": { | ||
| "description": "Total methane emission from microbial, fossil and pyrogenic sources.", | ||
| "regex": ".*methane_emis_total.*.tif$", | ||
| "title": "Total CH₄ Emission" | ||
| } | ||
| } | ||
| } | ||
| ], | ||
| "sample_files": [ | ||
| "" | ||
| ], | ||
| "data_type": "cog", | ||
| "stac_extensions": [ | ||
| "https://stac-extensions.github.io/render/v1.0.0/schema.json", | ||
| "https://stac-extensions.github.io/item-assets/v1.0.0/schema.json" | ||
| ], | ||
| "renders": { | ||
| "dashboard": { | ||
| "assets": [ | ||
| "total" | ||
| ], | ||
| "colormap_name": "purd", | ||
| "rescale": [ | ||
| [ | ||
| 0, | ||
| 50 | ||
| ] | ||
| ] | ||
| }, | ||
| "fossil": { | ||
| "assets": [ | ||
| "fossil" | ||
| ], | ||
| "colormap_name": "purd", | ||
| "rescale": [ | ||
| [ | ||
| 0, | ||
| 50 | ||
| ] | ||
| ] | ||
| }, | ||
| "microbial": { | ||
| "assets": [ | ||
| "microbial" | ||
| ], | ||
| "colormap_name": "purd", | ||
| "rescale": [ | ||
| [ | ||
| 0, | ||
| 30 | ||
| ] | ||
| ] | ||
| }, | ||
| "pyrogenic": { | ||
| "assets": [ | ||
| "pyrogenic" | ||
| ], | ||
| "colormap_name": "purd", | ||
| "rescale": [ | ||
| [ | ||
| 0, | ||
| 8 | ||
| ] | ||
| ] | ||
| }, | ||
| "total": { | ||
| "assets": [ | ||
| "total" | ||
| ], | ||
| "colormap_name": "purd", | ||
| "rescale": [ | ||
| [ | ||
| 0, | ||
| 50 | ||
| ] | ||
| ] | ||
| } | ||
| }, | ||
| "providers": [], | ||
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| "eic:tenant": "ghgc", | ||
| "item_assets": { | ||
| "cog_default": { | ||
| "type": "image/tiff; application=geotiff; profile=cloud-optimized", | ||
| "roles": [ | ||
| "data", | ||
| "layer" | ||
| ], | ||
| "title": "Default COG Layer", | ||
| "description": "Cloud optimized default layer to display on map" | ||
| }, | ||
| "fossil": { | ||
| "type": "image/tiff; application=geotiff; profile=cloud-optimized", | ||
| "roles": [ | ||
| "data", | ||
| "layer" | ||
| ], | ||
| "title": "Fossil CH₄ Emission", | ||
| "description": "Emission of methane from all fossil sources, such as oil and gas activities and coal mining." | ||
| }, | ||
| "microbial": { | ||
| "type": "image/tiff; application=geotiff; profile=cloud-optimized", | ||
| "roles": [ | ||
| "data", | ||
| "layer" | ||
| ], | ||
| "title": "Microbial CH₄ Emission", | ||
| "description": "Emission of methane from all microbial sources, such as wetlands, agriculture and termites." | ||
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There was a problem hiding this comment. "Emission of methane from all microbial sources, such as wetlands, ruminants, agriculture, and termites." Question: what's the difference between the "discovery items" and "item assets"? Or I guess what's the purpose of each? There was a problem hiding this comment.
Member
There was a problem hiding this comment.
Great question, @smk0033 ! The difference is that discover items assets are used to find and assign files during an ingestion, whereas item assets is a STAC collection level metadata (part of the Item Assets extension) that indicates what assets consumers can expect on items for the collection.
Member
There was a problem hiding this comment. ah sorry I didn't realize @anayeaye already answered! |
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| }, | ||
| "pyrogenic": { | ||
| "type": "image/tiff; application=geotiff; profile=cloud-optimized", | ||
| "roles": [ | ||
| "data", | ||
| "layer" | ||
| ], | ||
| "title": "Pyrogenic CH₄ Emission", | ||
| "description": "Emission of methane from all sources of biomass burning, such as wildfires and crop burning." | ||
| }, | ||
| "total": { | ||
| "type": "image/tiff; application=geotiff; profile=cloud-optimized", | ||
| "roles": [ | ||
| "data", | ||
| "layer" | ||
| ], | ||
| "title": "Total CH₄ Emission", | ||
| "description": "Total methane emission from microbial, fossil and pyrogenic sources" | ||
| } | ||
| }, | ||
| "datetime_range": "day", | ||
| "extent": { | ||
| "spatial": { | ||
| "bbox": [ | ||
| [ | ||
| 180, | ||
| -180, | ||
| 90, | ||
| -90 | ||
| ] | ||
| ] | ||
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| }, | ||
| "temporal": { | ||
| "interval": [ | ||
| [ | ||
| "1998-01-01T00:00:00Z", | ||
| "2023-12-31T00:00:00Z" | ||
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| ] | ||
| ] | ||
| } | ||
| }, | ||
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| "is_periodic": true, | ||
| "summaries": { | ||
| "datetime": [ | ||
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There was a problem hiding this comment. "1998-01-01T00:00:00Z", |
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| "2001-01-01T00:00:00Z", | ||
| "2024-12-31T00:00:00Z" | ||
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| ] | ||
| }, | ||
| "type": "Collection" | ||
| } | ||
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should this be in links?
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I don't think so 😯
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Here we have a "cite-as" link with the doi listed: https://stac.maap-project.org/collections/glad-global-forest-change-1.11 - it's not required, just an example (not all browser extensions interpret links in descriptions vs links in "links")
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I think it should be persisted in the description in case any downstream systems previously expected it there. We could consider repeating the info in links and adding the https://stac-extensions.github.io/scientific/v1.0.0/schema.json extension to use as an example for new collections