Paleoclimatic Signals from the Proxy Records of the Southern Ocean: A Review

Nair, Abhilash; Mohan, Rahul

doi:10.16943/ptinsa/2017/48949

Cited by 2 publications

(1 citation statement)

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“…Study of diatoms from surface sediments of Enderby Basin of Indian Sector of Southern Ocean revealed that the diatom abundance correlates well with the variation in Antarctic summer and winter sea-ice extent (Mohan et al, 2011). An interesting application of the morphology of diatom as a proxy is to analyze if and how it varied over glacial to interglacial transitions at the Polar Front, as this may reflect millennial-scale shifts in the position of this front, and the associated high export of biogenic silica (Shukla et al, 2013;Nair et al, 2015;Nair et al, 2017). Shukla et al (2013) suggested that variations in circum-polar upwelling were the main controlling factor in opal production during the last ~20,000 years.…”

Section: Late Quaternary Oceanic Changes In the Indian Sector Of The mentioning

confidence: 99%

Palaeoclimatic records from Antarctica and Southern Ocean: A review of Indian contributions

Thamban

2020

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Polar regions are highly sensitive to climate change and are crucial for regulating the Earth's climate. While the past climatic changes were forced differently than the ongoing and future anthropogenic changes, such periods may provide insights into potential future climate impacts and ecosystem feedbacks, especially over centennial-to-millennial timescales that are often not covered by climate model simulations. As part of the initiatives to better understand the polar climate system and its global linkages, Indian scientists have been undertaking palaeoclimatic studies, mainly from the Antarctica, its margins and the surrounding Southern Ocean. Antarctic palaeoclimate records come primarily from proxy records of ice cores or marine and lake sediment cores. Among ice core records, the Indian contributions have been focussing on a network of annually resolved shallow depth ice cores to reconstruct the Antarctic climate variability and its regional and global climatic teleconnections, especially during the past few centuries. Compared to this, the Antarctic lake sediment records have focussed on long-term climate variability, especially during the late Quaternary. Recently, as part of the collaborative initiatives under the International Ocean Discovery Program, Indian scientists have been studying longer sedimentary records from the Antarctic continental margin that offer opportunity to study the evolution and dynamics of the Antarctic ice sheets since their formation during the Cenozoic.

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