Secular variability and 200-year diploar oscillations in an atmospheric circulation over East Antarctica during the Holocene

AbstractMeasurements of the concentration and size distribution of dust particles found in the EPICA (European Project for Ice Coring in Antarctica) Dome C ice core, East Antarctica, provide records covering the last 27000 years. the total concentration decreased drastically by a factor of 55 from the Last Glacial Maximum (LGM) (800 ppb) to the Holocene (15 ppb), with a well-marked absolute minimum around 11500–11600 years ago. This latter almost corresponds to the end of the Younger Dryas in Greenland, which was marked by a methane peak related to the expansion of tropical wetlands. Assuming that the source region forAntarctic dust is the southern part of South America, the Antarctic dust minimum suggests a larger geographical extent for this wet period. the volume (mass)-size distribution of the particles displays a mode which is close to 2 μm in diameter, shifting from 1.9 μm in the glacial period to 2.07 μm in the Holocene. As opposed to previous results from old Dome C, EPICA suggests a greater proportion of large particles in Holocene samples than in LGM samples. In addition, for the period 13 000–2000BP, structured millennial-scale oscillations of the dust mode appear. These are especially well marked before 5000 years ago, with higher frequencies also present. the difference between LGM and Holocene particle distributions may be related to changes in the pattern of dust transport to East Antarctica. At Dome C the greater proportion of coarse particles observed during the Holocene suggests greater direct meridional transport. During the LGM, atmospheric circulation was likely more zonal, causing a greater amount of large dust particles to be removed from the atmosphere before reaching Antarctica. Changes in atmospheric circulation could also be the cause of the millennial-scale dust-mode oscillations during the Holocene.

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Winter warming over Dome Fuji, East Antarctica and semiannual oscillation in the atmospheric circulation

Journal of Geophysical Research Atmospheres ◽

10.1029/98jd02001 ◽

1998 ◽

Vol 103 (D18) ◽

pp. 23103-23111 ◽

Cited By ~ 26

Author(s):

Hiroyuki Enomoto ◽

Hideaki Motoyama ◽

Takayuki Shiraiwa ◽

Takashi Saito ◽

Takao Kameda ◽

...

Keyword(s):

Atmospheric Circulation ◽

East Antarctica ◽

Winter Warming ◽

Semiannual Oscillation

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Penguin tissue as a proxy for relative krill abundance in East Antarctica during the Holocene

Scientific Reports ◽

10.1038/srep02807 ◽

2013 ◽

Vol 3 (1) ◽

Cited By ~ 14

Author(s):

Tao Huang ◽

Liguang Sun ◽

Nanye Long ◽

Yuhong Wang ◽

Wen Huang

Keyword(s):

East Antarctica ◽

The Holocene ◽

Krill Abundance

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The dynamics of Holocene monsoon based on meteoric 10Be at Kunlun Pass on the northeastern Qinghai-Tibet Plateau

10.5194/egusphere-egu21-5983 ◽

2021 ◽

Author(s):

Peng Chen ◽

Zhongbo Yu ◽

Markus Czymzik ◽

Ala Aldahan ◽

Jinguo Wang ◽

...

Keyword(s):

Atmospheric Circulation ◽

Summer Monsoon ◽

Asian Summer Monsoon ◽

Early Holocene ◽

Tibet Plateau ◽

The Holocene ◽

Proxy Records ◽

Low Levels ◽

High Level ◽

Qinghai Tibet Plateau

Multiple proxy records have been used for the understanding of environmental and climate changes during the Holocene. For the first time, we here measure meteoric 10Be isotope of sediments from a drill core collected at the Kunlun Pass (KP) on the northeastern Qinghai-Tibet Plateau (NETP) to investigate mositure and atmospheric circulation changes during the Holocene. The 10Be flux suggests relative low levels in the Early Holocene, followed by a sharp increase to high values at around 4 ka BP (4 ka BP = 4000 years before present). Afterwards, the 10Be flux remains on a high level during the Late Holocene, but decreases slightly towards today. These 10Be deposition patterns are compared to moisture changes in regions dominated by the Indian Summer Monsoon (ISM), East Asian Summer Monsoon (EASM), and the Westerlies. Different from the gradual changes in monsoon patterns, the 10Be data reveal low levels during the Early Holocene until ~4 ka BP when an obvious increase was indicated and a relative high level continues to this day, which is relatively more in agreement with patterns of the Westerlies. This finding provides a new evidence for a shift in the dominant pattern of atmospheric circulation at the KP region from a more monsoonal one to one dominated by the Westerlies. Our results improve the understanding of non-stationary interactions and spatial relevance of the EASM, the ISM and the Westerlies on the Qinghai-Tibet Plateau.

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Coastal oceanographic conditions in the Prydz Bay region (East Antarctica) during the Holocene recorded in an isolation basin

The Holocene ◽

10.1191/0959683604hl702rp ◽

2004 ◽

Vol 14 (2) ◽

pp. 246-257 ◽

Cited By ~ 30

Author(s):

Elie Verleyen ◽

Dominic A. Hodgson ◽

Koen Sabbe ◽

Koenraad Vanhoutte ◽

Wim Vyverman

Keyword(s):

East Antarctica ◽

Prydz Bay ◽

The Holocene ◽

Isolation Basin ◽

Oceanographic Conditions

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Penguin occupation in the Vestfold Hills

Antarctic Science ◽

10.1017/s095410200800165x ◽

2008 ◽

Vol 21 (2) ◽

pp. 131-134 ◽

Cited By ~ 11

Author(s):

Tao Huang ◽

Liguang Sun ◽

Yuhong Wang ◽

Renbin Zhu

Keyword(s):

Sediment Core ◽

Environmental Changes ◽

Sediment Cores ◽

East Antarctica ◽

Before Present ◽

The Holocene ◽

History Of ◽

Vestfold Hills ◽

Free Area ◽

Ornithogenic Sediment

AbstractDuring CHINARE-22 (December 2005–March 2006), we investigated six penguin colonies in the Vestfold Hills, East Antarctica, and collected several penguin ornithogenic sediment cores, samples of fresh guano and modern penguin bone and feather. We selected seven penguin bones and feathers and six sediments from the longest sediment core and performed AMS14C dating. The results indicate that penguins occupied the Vestfold Hills as early as 8500 calibrated years before present (cal. yrbp), following local deglaciation and the formation of the ice free area. This is the first report on the Holocene history of penguins in the Vestfold Hills. As in other areas of Antarctica, penguins occupied this area as soon as local ice retreated and the ice free area formed, and they are very sensitive to climatic and environmental changes. This work provides the foundation for understanding the history of penguins occupation in Vestfold Hills, East Antarctica.

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The Holocene evolution and palaeosalinity history of Beall Lake, Windmill Islands (East Antarctica) using an expanded diatom-based weighted averaging model

Palaeogeography Palaeoclimatology Palaeoecology ◽

10.1016/j.palaeo.2004.02.032 ◽

2004 ◽

Vol 208 (1-2) ◽

pp. 121-140 ◽

Cited By ~ 21

Author(s):

Donna Roberts ◽

Andrew McMinn ◽

Holger Cremer ◽

Damian B Gore ◽

Martin Melles

Keyword(s):

East Antarctica ◽

Weighted Averaging ◽

The Holocene ◽

History Of ◽

Windmill Islands

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Sea ice and wind variability during the Holocene in East Antarctica: insight on middle–high latitude coupling

Quaternary Science Reviews ◽

10.1016/j.quascirev.2010.08.007 ◽

2010 ◽

Vol 29 (27-28) ◽

pp. 3709-3719 ◽

Cited By ~ 41

Author(s):

Delphine Denis ◽

Xavier Crosta ◽

Loic Barbara ◽

Guillaume Massé ◽

Hans Renssen ◽

...

Keyword(s):

Sea Ice ◽

High Latitude ◽

East Antarctica ◽

The Holocene ◽

Wind Variability

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Monsoon dynamics in past and future climates: the Holocene is not an analogue of future projections

10.5194/egusphere-egu2020-22069 ◽

2020 ◽

Author(s):

Roberta D'Agostino ◽

Juergen Bader ◽

Josephine Brown ◽

Simona Bordoni ◽

David Ferreira ◽

...

Keyword(s):

Atmospheric Circulation ◽

Northern Hemisphere ◽

Hydrological Cycle ◽

Dynamic Responses ◽

Mean Flow ◽

The Holocene ◽

Temperature And Precipitation ◽

The Future ◽

Future Warming ◽

The Relationship

In recent decades the paleo-modelling community has sought to identify past warm climates that could provide analogues for greenhouse induced warming. In spite of some similarities in temperature distributions (e.g. Pliocene, Eocene, Cretaceous and summertime Northern Hemisphere mid-Holocene), however, it is unlikely that any past epoch can provide detailed insight into future warming, especially in terms of changes in the hydrological cycle. Reviewing recent work, we show that changes in the atmospheric circulation can dramatically alter the relationship between temperature and precipitation, weakening the possibility for useful climate analogs as envisioned in the literature. We present results of moisture budget decomposition from mid-Holocene and Representative Pathways Scenario RCP8.5, two climates in which monsoons are stronger and wider than the pre-Industrial era. We find that Northern Hemisphere monsoons are much stronger and wider during the Holocene than what projected for the end of the 21st century. This is because the thermodynamic (i.e. moisture changes) and dynamic responses (i.e. mean-flow changes) reinforce each other in the mid-Holocene while they partially cancel out in the future climate. Therefore, the Holocene does not represent an analogue of the future given the opposite dynamical responses in the two climates. Consistent with other studies, our work highlights that changes in atmospheric circulation are the major source of uncertainty for future projection of hydrological cycle, especially at regional scales.

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