Glacial–interglacial climatic variations at the Schirmacher Oasis, East Antarctica: The first report from environmental magnetism

Warrier, Anish Kumar; Mahesh, B.S.; Mohan, Rahul; Shankar, M. Ravi; Asthana, Rajesh; Ravindra, Rasik

doi:10.1016/j.palaeo.2014.08.007

Cited by 42 publications

(19 citation statements)

References 71 publications

(100 reference statements)

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“…However, other studies have reported that the Schirmacher Oasis experienced warmer climatic conditions from 4.2 to ~2 ka BP as evident from the magnetic mineral concentrations and magnetic grain size parameters (Warrier et al 2014). Phartiyal (2014) marked Phase 5 as a comparatively overall arid and cold period from 8.7 to 4.4 ka.…”

Section: Discussionmentioning

confidence: 95%

“…To decipher the past climatic changes, the lacustrine sediments of this region should be addressed as they preserve the geological history. However, Schirmacher Oasis has still remained a less worked region in Antarctica with reference to paleoclimatic studies of lake sediments (Bera 2004;Sharma et al 2007;Phartiyal et al 2011;Phartiyal 2014;Warrier et al 2014Warrier et al , 2016Mahesh et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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Paleoenvironments of a proglacial lake in Schirmacher Oasis, East Antarctica: Insights from quartz grain microtextures

Mazumder¹,

Govil²,

Kar³

et al. 2017

Polish Polar Research

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This paper provides an overview of the results of research on changes in ground temperature down to 50 cm depth, on the Kaffiøyra Plain, Spitsbergen in the summer seasons. To achieve this, measurement data were analysed from three different ecotopes (CALM Site P2A, P2B and P2C) -a beach, a moraine and tundra -collected during 22 polar expeditions between 1975 and 2014. To ensure comparability, data sets for the common period from 21 July to 31 August (referred to as the "summer season" further in the text) were analysed. The greatest influence on temperature across the inves− tigated ground layers comes from air temperature (correlation coefficients ranging from 0.61 to 0.84). For the purpose of the analysis of the changes in ground temperature in the years 1975-2014, missing data for certain summer seasons were reconstructed on the ba− sis of similar data from a meteorological station at Ny−Ålesund. The ground temperature at the Beach site demonstrated a statistically−significant growing trend: at depths from 1 to 10 cm the temperature increased by 0.27-0.28°C per decade, and from 20 to 50 cm by as much as 0.30°C per decade. On the Kaffiøyra Plain, the North Atlantic Oscillation (NAO) has a greater influence on the ground and air temperature than the Arctic Oscilla− tion (AO).

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Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Paleoenvironments of a proglacial lake in Schirmacher Oasis, East Antarctica: Insights from quartz grain microtextures

Mazumder¹,

Govil²,

Kar³

et al. 2017

Polish Polar Research

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“…ka B.P. (Warrier et al, 2014). This study provided environmental magnetic evidence for the Schirmacher Oasis escaping full glaciation during the past 40,000 years.…”

Section: Palaeoclimatic Reconstruction Using Antarctic Lake Recordsmentioning

confidence: 73%

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

Thamban

2020

Episodes

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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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“…The East Antarctic coast is marked by a discontinuous mountain chain that can be traced intermittently all along the coast from 75 0 45′ E longitudes to 15 0 West longitudes, running nearly parallel to the coast line. There are some low lying, ice free areas in the coastal Antarctica such as the Schirmacher Oasis, Larsemann Hills, Vestfold Hills, Bunger Hills etc., that have been studied in detail for Late Pleistocene (~ 0.12 My) and Holocene glacial History [1][2][3][4][5][6][7][8][9][10][11][12] These oases are distinguished from nunataks by the process of ablation. While most nunataks are located in the accumulation zone of glaciers and are kept free of ice by the strong winds, the oases are separated from the ice sheet by a distinct ablation zone.…”

Section: Ice Free Areas Of East Antarcticamentioning

confidence: 99%

Geomorphological Insight of Some Ice Free Areas of Eastern Antarctica

Ravindra¹,

Mahesh²,

Mohan³

2021

Glaciers and the Polar Environment

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The Schirmacher Oasis and Larsemann Hills are among the few significant ice free areas of East Antarctica that are conspicuous due to presence of more than a hundred melt water lakes each, preserving the signatures of climatic variation and deglaciation history since Last Glacial Maximum (19 to 24 ky BP) and beyond. There are evidences, recorded in the lake sediments of low lying Larsemann Hills, of marine transgression due to variation in sea level, isostatic upliftment and close vicinity of the Hills to the marine environment. The Schirmacher Oasis, on the other hand has preserved various landforms-both erosional and depositional- typical of a periglacial environment along with proglacial lakes (incorporating signals of ice-sheet dynamics) and epishelf lakes (signatures of marine influence) .

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Glacial–interglacial climatic variations at the Schirmacher Oasis, East Antarctica: The first report from environmental magnetism

Cited by 42 publications

References 71 publications

Paleoenvironments of a proglacial lake in Schirmacher Oasis, East Antarctica: Insights from quartz grain microtextures

Paleoenvironments of a proglacial lake in Schirmacher Oasis, East Antarctica: Insights from quartz grain microtextures

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

Geomorphological Insight of Some Ice Free Areas of Eastern Antarctica

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