Source study found

Story checked

A Vast Hole Almost The Size of Portugal Opened Up in Antarctica's Winter Sea Ice. Now We Know Why. : ScienceAlert (opens in a new tab)

A Vast Hole Almost The Size of Portugal Opened Up in Antarctica's Winter Sea Ice. Now We Know Why. · 2026-10-01

Short answerEvidenceSource

Short answer

Mostly not supported

Mostly not supported.

3 claims go further than the study. One other point was not covered by the paper.

1 supported
3 overstated
1 not covered

Checked against the study summary. The full text wasn't available, so some details couldn't be settled either way.

Share this check

Follow the evidence trail

The story

A Vast Hole Almost The Size of Portugal Opened Up in Antarctica's Winter Sea Ice. Now We Know Why. : ScienceAlert

A Vast Hole Almost The Size of Portugal Opened Up in Antarctica's Winter Sea Ice. Now We Know Why. · 2026-10-01

The story’s checkable claims.

Read the original story

NewsLink checks it

Mostly not supported

Three of five claims overstate the study. One of five checks out. One claim the study doesn't address.

1 supported
3 overstated
1 not covered

Open claim evidence

The source study

Unprecedented Open‐Ocean Polynya in Breid Bay, East Antarctica in Winter 2024

Geophysical Research Letters · 2026

Open source record

Then inspect each claim

Evidence layer

Claim by claim

Each claim gets a verdict. Expand it to see the evidence directly below.

Reading mode

Scan verdicts. Open evidence only when needed.

Browse by verdict

5 claims in this story

Showing all 5 claimsChoose a verdict to focus the list.

Claim 1 of 5OverstatedA research team from India led by earth scientist Jeebanjyoti Swain said the hole was caused by a series of extreme weather conditions, including intense atmospheric rivers and marine heatwaves.View evidenceHide evidence

As statedsix atmospheric rivers from July 2024 through August

Why this verdict

The abstract profile supports that the authors attributed the event to the integrated impact of six intense atmospheric rivers plus oceanic heat contributions including sustained marine heatwaves. However, the story’s unhedged wording that the hole 'was caused by' these conditions is stronger than the abstract-level observational/diagnostic evidence warrants, especially because the profile notes limited method detail, no uncertainty estimates, and no quantitative partitioning of atmospheric versus oceanic contributions. The author/team identity is not verifiable from the supplied paper profile.

Study evidence

Polynya formation in Breid Bay (4 Aug 2024) is attributed to the integrated impact of six intense atmospheric rivers during July–August 2024.

“The polynya formation was driven by integrated impact of six intense atmospheric rivers (ARs) during July‐August 2024”

Study evidence

Ekman suction–driven upwelling and enhanced eddy kinetic energy contributed to upper-ocean warming and sustained marine heatwaves during July–August 2024 in Breid Bay.~0.6°C upper-ocean warming

“Concurrently, Ekman suction–driven upwelling and enhanced eddy kinetic energy contributed to upper‐ocean warming (∼0.6°C) and sustained marine heatwaves, thereby increasing the ocean‐to‐ice heat flux.”

Claim 2 of 5OverstatedThe authors said the atmospheric rivers brought warm, moist air and persistent southward flow that increased downwelling long-wave radiation, atmospheric warming, warm snowfall, and ocean heat flux, which suppressed sea-ice growth.View evidenceHide evidence

As statedsix atmospheric rivers; among the strongest mid-winter moisture transport events on record

Why this verdict

The listed atmospheric-river mechanisms—extreme poleward moisture transport, northerly flow, enhanced downwelling longwave radiation, atmospheric heatwaves, snowfall, and large heat fluxes hindering sea-ice growth—are in the abstract profile. But the story presents the causal chain as settled and unhedged, while the supplied evidence is abstract-level observational attribution with unspecified datasets, detection algorithms, statistical methods, and uncertainty.

Study evidence

Polynya formation in Breid Bay (4 Aug 2024) is attributed to the integrated impact of six intense atmospheric rivers during July–August 2024.

“The polynya formation was driven by integrated impact of six intense atmospheric rivers (ARs) during July‐August 2024”

Claim 3 of 5OverstatedThe team said strong winds induced Ekman suction, bringing warmer subsurface water to the surface and contributing to upper-ocean warming, while sustained marine heatwaves further inhibited sea-ice freezing.View evidenceHide evidence

Why this verdict

The abstract profile supports oceanic contributions involving Ekman-suction-driven upwelling, enhanced eddy kinetic energy, upper-ocean warming of about 0.6°C, sustained marine heatwaves, and increased ocean-to-ice heat flux. The story captures the broad mechanism but states the causal chain unhedged and omits the abstract’s uncertainty/method limitations and the role of enhanced eddy kinetic energy. At abstract depth, this is stronger than the evidence can independently verify.

Study evidence

Ekman suction–driven upwelling and enhanced eddy kinetic energy contributed to upper-ocean warming and sustained marine heatwaves during July–August 2024 in Breid Bay.~0.6°C upper-ocean warming

“Concurrently, Ekman suction–driven upwelling and enhanced eddy kinetic energy contributed to upper‐ocean warming (∼0.6°C) and sustained marine heatwaves, thereby increasing the ocean‐to‐ice heat flux.”

Claim 4 of 5Not coveredThe article says the researchers predict more Antarctic polynyas in the future as climate change strengthens atmospheric rivers, increases air and sea heatwaves, and warms the Southern Ocean.View evidenceHide evidence

Why this verdict

The supplied abstract-level profile does not include a future projection that Antarctic polynyas will become more common, nor does it profile climate-change-driven strengthening of atmospheric rivers, air/sea heatwaves, or Southern Ocean warming as a conclusion of this paper. This may appear elsewhere in the full paper or article context, but it is not verifiable from the abstract-depth profile.

Claim 5 of 5SupportedIn August 2024, satellite images revealed a massive polynya in Breid Bay, East Antarctica, at a time of year when the bay is usually entirely covered in sea ice.View evidenceHide evidence

As stated89,121 square kilometers, slightly smaller than Portugal

Why this verdict

The abstract-level profile supports the core event claim: an unprecedented winter open-ocean polynya occurred in Breid Bay on 4 Aug 2024 and reached 89,121 km2. The profile also supports that this was unusual for winter conditions. The abstract profile does not directly specify that 'satellite images' revealed it or independently establish the comparison to Portugal, but the central timing, location, and magnitude are supported.

Study evidence

An open-ocean polynya in Breid Bay was documented on 4 August 2024 with a reported maximum area of 89,121 km2.89,121 km2

“We document an unprecedented winter open‐ocean polynya in the Breid Bay, on 4 August 2024, attaining a maximum area of 89,121 km2.”

Then look for missing context

Context layer

What the story left out

Important study details the story did not include.

The paper reports pre-opening sea-ice concentration declined from about 96% in early July to below 25% by 30 July 2024, interpreted as preconditioning before the polynya opened.
The story says the bay is usually frozen, but it does not report the quantitative sea-ice concentration decline or the paper’s preconditioning evidence.
From secondary_data / remote-sensing time-series analysis

3 things the story did carry across

The paper documents an unprecedented winter open-ocean polynya in Breid Bay on 4 Aug 2024 with a maximum area of 89,121 km2.
The paper attributes meteorological drivers to six intense atmospheric rivers during July–August 2024 and associated moisture, wind, radiation, warming, snowfall, and surface heat-flux anomalies that hindered sea-ice growth.
The paper attributes oceanic contributions to Ekman-suction-driven upwelling, enhanced eddy kinetic energy, upper-ocean warming, sustained marine heatwaves, and increased ocean-to-ice heat flux.

Then read the study layer

Study layer

Study at a glance

Scan the study first. Expand only the parts you want to inspect.

Pieces of work

Evidence read

study summary

Lead result

secondary data

1Lead resultsecondary dataDocument and characterize the unprecedented winter 2024 open-ocean polynya event in Breid Bay (timing, evolution of sea-ice concentration, maximum area).secondary data / remote-sensing time-series analysisExpand

In plain English

The paper documents an unprecedented winter open-ocean polynya in Breid Bay that opened on 4 August 2024 and reached a maximum area of 89,121 km2. Prior to opening, authors report sea-ice concentration falling from ~96% in early July to below 25% by 30 July 2024, interpreted as substantial preconditioning of the winter ice cover.

Key findings

An open-ocean polynya in Breid Bay was documented on 4 August 2024 with a reported maximum area of 89,121 km2.89,121 km2
Sea-ice concentration declined from approximately 96% in early July to below 25% by 30 July 2024, which the authors interpret as substantial preconditioning prior to polynya opening.~96% → <25%

“We document an unprecedented winter open‐ocean polynya in the Breid Bay, on 4 August 2024, attaining a maximum area of 89,121 km2.”

What this piece can’t prove

3 further details could not be confirmed from the summary.

2secondary dataAttribute (meteorological) drivers of the polynya to repeated extreme atmospheric rivers and associated surface energy/moisture impacts that inhibited sea-ice growth.secondary data analysis (atmospheric diagnostics, AR detection, surface flux analysis) impliedExpand

In plain English

The authors attribute the Breid Bay winter 2024 open-ocean polynya to the integrated impact of six intense atmospheric rivers (July–August 2024). These ARs produced extreme (>99th percentile) poleward moisture transport (>600 kg m−1 s−1), northerly winds, enhanced downwelling longwave radiation, atmospheric heatwaves with anomalous warming (~19°C), increased snowfall (~0.9 mm w.e. day−1), and large surface heat fluxes (~97 W m−2), which the authors report as hindering sea-ice growth and, together with oceanic warming, facilitating polynya formation.

Key findings

Polynya formation in Breid Bay (4 Aug 2024) is attributed to the integrated impact of six intense atmospheric rivers during July–August 2024.
The ARs produced extreme (>99th percentile) poleward moisture transport (>600 kg m−1 s−1), northerly winds, enhanced downwelling longwave radiation, atmospheric heatwaves (~19°C anomalous warming), increased snowfall (~0.9 mm w.e. day−1), and large surface heat fluxes (~97 W m−2).>600 kg m^-1 s^-1 (moisture transport); ~19°C (atmospheric warming); ~0.9 mm w.e. day^-1 (snowfall); ~97 W m^-2 (surface heat flux)

“The polynya formation was driven by integrated impact of six intense atmospheric rivers (ARs) during July‐August 2024”

What this piece can’t prove

3 further details could not be confirmed from the summary.

3secondary dataAttribute (oceanic) contributions to the polynya to Ekman-suction-driven upwelling, enhanced eddy activity, upper-ocean warming, and sustained marine heatwaves increasing ocean-to-ice heat flux.Expand

In plain English

From the abstract: the authors attribute oceanic contributions to the Breid Bay winter polynya to Ekman-suction-driven upwelling and enhanced eddy kinetic energy (EKE), which they report contributed to upper-ocean warming (~0.6°C) and sustained marine heatwaves; these oceanic changes increased the ocean-to-ice heat flux and, together with atmospheric forcing, helped facilitate and sustain the polynya.

Key findings

Ekman suction–driven upwelling and enhanced eddy kinetic energy contributed to upper-ocean warming and sustained marine heatwaves during July–August 2024 in Breid Bay.~0.6°C upper-ocean warming
The resulting increased ocean-to-ice heat flux from the warmed upper ocean is reported to have helped sustain the open-ocean polynya.

“Concurrently, Ekman suction–driven upwelling and enhanced eddy kinetic energy contributed to upper‐ocean warming (∼0.6°C) and sustained marine heatwaves, thereby increasing the ocean‐to‐ice heat flux.”

What this piece can’t prove