Antarctic sea ice hits third-lowest record, 1 million sq km below long-term average
GS3Economy · S&T · Environment · Security· Nuclear & new energy technology· Prelims·
Why in news
NASA and NSIDC reported that Antarctic sea ice reached its annual maximum at a third-lowest record, significantly below the long-term average due to global heating.
Background
On September 14, Antarctic sea ice covered 17.59 million square kilometres. This figure is 1 million square kilometres below the long-term average, marking the third-lowest record.
Facts for Prelims
- FactAntarctic sea ice maximum area: 17.59 million square kilometres
- FactSea ice deficit: 1 million square kilometres below long-term average
- BodyNSIDC: National Snow and Ice Data Centre
- PlaceAntarctica
For Mains
Q. Discuss the implications of declining Antarctic sea ice on global thermohaline circulation and its subsequent impact on global climate patterns.
Dimensions to cover in your answer
- Albedo feedback loop: Reduced ice cover increases solar absorption by darker ocean waters
- Oceanic circulation: Altered salinity and temperature gradients affecting global heat distribution
Keywords: Albedo effect · Thermohaline circulation · Global warming · Cryosphere degradation
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