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GCRIOceans and CoastsIn development
Subject groups

Subject groups

Moderated groups where specialists discuss questions in Oceans and Coasts. Each group is listed here when its moderation, terms and hosting are in place, with its scope and how to join.

Make an enquiry Back to Specialist community
In this dossier6 parts
  1. 01In briefThe short answer
  2. 02How it worksSubject groups in Oceans and Coasts
  3. 03Group themesSubjects where ocean and coastal specialists most need a shared forum
  4. 04Next stepRegister your interest
  5. 05Key termsTerms used on this page
  6. 06SourcesWhere this page's references lead

GCRI · In development · service level R0

01In brief

The short answer.

Oceans and Coasts subject groups are moderated forums where marine scientists and coastal planners discuss open questions in the oceans and coasts field, such as sea level and coastal flood and marine ecosystems. Each group is listed once its moderation, terms and hosting are in place, with its scope and how to join. A group informs the platform's work and has no authority over its findings.

02Canvas

From enquiry to contribution.

Canvas · from enquiry to contributionDesign, not a record
Subject groups: a working group from charter to sunsetA charter sets the question and the code of conduct; members join with declared interests; a workplan produces deliverables that are reviewed and credited; the group reports and sunsets or renews. Design of the process, not a record of a run.

Fig.The path from an enquiry to a credited contribution. Design, not a record; no step creates membership.

03Geography

People and exposure in Pacific Island states.

Population density, night-time lights, air quality, heat and floods, framed on Pacific Island states; each layer is a dated NASA product.

The interactive map needs JavaScript; the layer list and sources are below.

Layers 2

People and exposure

Latest available

NASA GIBS / EOSDIS · ASTER GDEM (METI, NASA) · Natural Earth

Loading the latest NASA imagery.

Drag to move. Ctrl or ⌘ and scroll, pinch or the buttons to zoom; hover for the values under the pointer; reset returns to the region.

Population density, night-time lights, air quality, heat and floods, framed on Pacific Island states.Satellite and model products as NASA publishes them, each with its own date; indicators, not assessments of any place; claim ceiling INTEGRATED.

Data: NASA GIBS · ASTER GDEM · Natural EarthSources and licences

  • We acknowledge the use of imagery provided by services from NASA's Global Imagery Browse Services (GIBS), part of NASA's Earth Science Data and Information System (ESDIS). Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • We acknowledge the use of imagery provided by services from NASA's Global Imagery Browse Services (GIBS), part of NASA's Earth Science Data and Information System (ESDIS). Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • Center for International Earth Science Information Network (CIESIN), Columbia University. 2018. Gridded Population of the World, Version 4 (GPWv4): Population Density, Revision 11. NASA Socioeconomic Data and Applications Center (SEDAC). Licensed under CC BY 4.0. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). CC BY 4.0
  • VIIRS Black Marble night-time lights, NASA Goddard Space Flight Center; distributed by the NASA Level-1 and Atmosphere Archive and Distribution System (LAADS DAAC); imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • OMI nitrogen dioxide (Aura) and OMPS aerosol index (Suomi NPP), NASA; distributed by the NASA GES DISC; imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • VIIRS near-real-time products (flood, land surface temperature, snow cover, corrected reflectance), NASA LANCE; imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • ASTER GDEM is a product of METI and NASA (ASTER Global Digital Elevation Model V003, NASA LP DAAC); imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • Made with Natural Earth. Free vector and raster map data @ naturalearthdata.com. Public domain
  • Globe: MapLibre GL JS 6.9.1, BSD-3-Clause, © MapLibre contributors.

Layers and dates

  • Population density, 2020: Population: CIESIN, Columbia University, Gridded Population of the World v4.11 (2018), NASA SEDAC, CC BY 4.0 · static
  • Night-time lights, daily: VIIRS Black Marble (VNP46A2), NASA LAADS DAAC · 12 Oct 2026
  • Nitrogen dioxide, lower atmosphere column: OMI Aura, NASA GES DISC · 10 Oct 2026
  • Land surface temperature, day, 8-day composite: VIIRS NOAA-20 Level 3, 8-day, NASA LANCE · 14 Sep 2026
  • Flood water, 3-day composite: VIIRS Global Flood Product, NASA LANCE · 14 Oct 2026

04How it works

Subject groups in Oceans and Coasts.

  • Each entry shows its scope, host or owner, and terms.
  • Participation follows published rules, applied equally.
  • Taking part gives no authority or influence over findings.
05Group themes

Subjects where ocean and coastal specialists most need a shared forum.

Coastal groups connect oceanographers with engineers, port operators and fishers, because a sea-level scenario only becomes useful when someone translates it into a design height or a fishing season.

  • Coastal adaptation.
  • Ocean observation.
  • Fisheries and livelihoods.
06Next step

Register your interest.

Write to contact@therisk.global. The acknowledgement gives a reference and names the next step.

07Key terms

Terms used on this page.

Each term as this page uses it. Where a standard-setting body defines the term, the wording follows that body.

TermDefinition
Community of practiceA group of people who share a concern or a craft and learn to do it better by interacting regularly; the term comes from Lave and Wenger's work on situated learning.
Chatham House RuleA rule under which participants may use information received but may not reveal the identity or affiliation of speakers.
Blue economyEconomic activity that uses or depends on the ocean and coasts, often with an aim of sustainability.
Thermal expansionThe increase in seawater volume as it warms, a major contributor to sea-level rise.
08Sources

Where this page's references lead.

The bodies and documents this page is read against. Status and editions change; each link goes to the issuing body.

09Questions

Questions and answers.

When are entries added?
When their hosting, terms and moderation are confirmed.
Related

Around Oceans and Coasts.

Oceans and Coasts

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