{
  "region": "greenland",
  "methodsHref": "/data.html#greenland-annual-balance",
  "id": "2026-10-22-greenland",
  "status": "published",
  "draftedAt": "2026-10-22",
  "plannedPublicationAt": "2026-10-22T11:00:00+01:00",
  "publishedAt": "2026-10-22",
  "reviewedAt": "2026-10-22",
  "evidenceHref": "/data.html#briefing-2026-10-22-greenland",
  "previousBriefingId": "2026-10-08-greenland",
  "kind": "expedition-context",
  "source": "British Antarctic Survey · GIANT expedition",
  "sourceUrl": "https://www.bas.ac.uk/news/robot-fleet-reveals-secrets-of-greenlands-melting-glaciers-in-ambitious-arctic-expecition/",
  "dataThrough": "2026-10-09",
  "sourcePublishedAt": "2026-10-09",
  "observationPeriod": null,
  "observationPeriodText": "Summer 2026; month-long expedition. Exact start and end dates are not stated in the cited report.",
  "periodLabel": "Fieldwork: summer 2026 · Expedition report: 9 October 2026",
  "previewDates": "Published 22 Oct 2026 · Fieldwork: summer 2026 · BAS report: 9 Oct",
  "headline": "Robots measure melting at Greenland’s glacier face.",
  "value": "19",
  "unit": "hours",
  "valueLabel": "Measurements at the glacier face",
  "baselineLabel": "Summer 2026 · BAS GIANT expedition",
  "copy": "During summer 2026, a BAS-led team aboard RRS Sir David Attenborough studied Sorgenfri Gletsjer and its fjord in East Greenland. A sensor placed in the glacier face collected measurements for 19 hours, alongside surveys by underwater robots. Researchers will use the observations to improve models of glacier melting and freshwater movement into the Atlantic. BAS reported the expedition on 9 October; the report does not give a new ice-sheet-wide melt estimate.",
  "mapHref": "/data.html#briefing-2026-10-22-greenland",
  "mapLabel": "Read the expedition sources",
  "selectionReason": "Owner selected the BAS field-science story as Greenland’s new context briefing. Keep the earlier annual mass-balance edition and its observation period unchanged in the archive.",
  "editorialAssessment": {
    "analyse": "BAS’s 9 October expedition report describes summer 2026 fieldwork at Sorgenfri Gletsjer in East Greenland. The team worked in the fjord for 30 days, deployed instruments 523 times and obtained 19 continuous hours of Meltstake measurements close to the glacier face. These are expedition achievements and measurement duration, not a quantified regional melt rate or a fortnightly change.",
    "evaluate": "This is an official expedition report, not a peer-reviewed analysis of the resulting measurements. BAS describes the first Meltstake deployment in Greenland; the briefing does not extend that claim to all glacier research. The report does not specify exact fieldwork dates, a new whole-ice-sheet mass-loss estimate, a historical melt ranking, or uncertainty bounds on a melt-rate result. Photos have named credits and are not reused here.",
    "explain": "Researchers intend to improve understanding and models of glacier–ocean melting, fjord mixing and freshwater transport into the North Atlantic. These are research aims, not proof that a circulation tipping point has occurred or a prediction of its date. BAS says analysis and model development will continue over the following three years. The annual mass-balance briefing remains a separate dated record; a small source revision checked 22 October is noted beside the archive."
  },
  "method": {
    "kind": "Independent editorial summary of the official BAS expedition report; no new ice-loss calculation.",
    "limitations": [
      "Fieldwork occurred during summer, not this fortnight.",
      "The report describes data collection and planned analysis, not a new whole-ice-sheet melt estimate.",
      "No circulation tipping point or local ecosystem impact is demonstrated by the report.",
      "Nineteen hours is sensor measurement duration, not the length of the expedition."
    ]
  },
  "providerAvailabilityNote": "BAS report checked 22 October. Exact fieldwork dates are not stated in this report. The previous annual mass-balance briefing remains dated 8 October in the archive.",
  "contextSources": [
    {
      "title": "BAS: Robot fleet studies Greenland’s melting glaciers",
      "url": "https://www.bas.ac.uk/news/robot-fleet-reveals-secrets-of-greenlands-melting-glaciers-in-ambitious-arctic-expecition/",
      "publishedAt": "2026-10-09",
      "verifiedAt": "2026-10-22",
      "observationPeriod": "Summer 2026; 30 days in an East Greenland fjord",
      "finding": "GIANT researchers collected 19 continuous hours of Meltstake measurements at the glacier face, supported by robotic mapping and fjord oceanography. Analysis and model development are ongoing."
    }
  ],
  "archivedInputs": "/briefings/evidence/2026-10-22-greenland-inputs.json",
  "archivedInputsSha256": "318e73e321fafed868f4348533c30d0c644be2917aa3e6bfcdf16834210d989a",
  "finalSourceCheckRequired": false,
  "reviewRequired": false,
  "wordCount": 71,
  "publicationApprovedAt": "2026-10-22T10:50:26.173432+00:00"
}