Atmospheric signals and characteristics of accumulation in Dronning Maud Land, Antarctica

Noone, David; Turner, John; Mulvaney, Robert

doi:10.1029/1999jd900376

Cited by 125 publications

(196 citation statements)

References 53 publications

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“…The satellite image displays a clear comma-shaped structure associated with this depression. This low drew moisture in from the South Atlantic as a ridge of high pressure pushed southwards at around 5 • W, similar to patterns observed by Noone et al (1999). On 31 December 2000, the low over the Weddell Sea (east of the AP) moved south and further east and remained relatively deep (968 hPa).…”

Section: Case Studies Of Precipitation Delivery Mechanismssupporting

confidence: 77%

Eastern Antarctic Peninsula precipitation delivery mechanisms: process studies and back trajectory evaluation

Russell

McGregor

Marshall

2008

Atmospheric Science Letters

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The atmospheric circulation patterns that result in precipitation events at a site on the eastern Antarctic Peninsula (AP) are investigated using back trajectories (BTs) driven by ERA-40 data. Moisture delivery occurs from the east and west depending on the location of blocking events in the South Atlantic and Pacific Oceans. Observations are sparse in this region, so our process studies compare the trajectories (and the ERA-40 fields from which they were derived) with advanced very high resolution radiometer (AVHRR) satellite images. It is found that the trajectories represent these transport mechanisms very well and that they are relatively insensitive to the initial trajectory elevation.

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Section: Case Studies Of Precipitation Delivery Mechanismssupporting

confidence: 77%

Eastern Antarctic Peninsula precipitation delivery mechanisms: process studies and back trajectory evaluation

Russell

McGregor

Marshall

2008

Atmospheric Science Letters

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“…Unfortunately, the annual accumulation at such sites is small. A further complication is that whereas at most coastal sites the precipitation comes from synoptic and mesoscale weather systems, in the interior the snowfall comes from both clear-sky precipitation and active weather systems (Noone et al, 1999), with the clear-sky contribution being dominant at locations well away from the coast. On the high interior plateau, at sites such as Amundsen-Scott station at the South Pole and Vostok station, weather systems are rather rare and most precipitation falls as diamond dust.…”

Section: Signals Of Enso In Antarctic Ice Coresmentioning

confidence: 99%

The El Niño–southern oscillation and Antarctica

Turner

2004

Intl Journal of Climatology

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444

430

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This paper reviews our understanding of how the effects of the El Niño-southern oscillation (ENSO) might be transmitted from the tropical Pacific Ocean to the Antarctic, and examines the evidence for such signals in the Antarctic meteorological, sea ice, ice core and biological records. Many scientific disciples concerned with the Antarctic require an understanding of how the climatic conditions in the tropical and mid-latitude regions affect the Antarctic, and it is hoped that this review will aid their work.The most pronounced signals of ENSO are found over the southeast Pacific as a result of a climatological Rossby wave train that gives positive (negative) height anomalies over the Amundsen-Bellingshausen Sea during El Niño (La Niña) events. However, the extra-tropical signature can sometimes show a high degree of variability between events in this area. In West Antarctica, links between ENSO and precipitation have shown variability on the decadal time scale. Across the continent itself, it is even more difficult to relate meteorological conditions to ENSO, yet analyses of the long meteorological records from the stations do indicate a distinct switch in sign of the pressure anomalies from positive to negative across the minimum in the southern oscillation index.The oceanic signals of ENSO around the Antarctic are less clear, but it has been suggested that the Antarctic circumpolar wave could be forced by the phenomenon.Ice-core data offer the potential to help in understanding the long-term relationship between ENSO and the climate of the Antarctic, but there are difficulties because of the need to smooth the ice-core data to overcome the mixing of snow on the surface. Nevertheless, analysis of methylsulphonic acid in a South Pole core has shown high variability on ENSO time scales.It is clear that some evidence of ENSO can be found in the Antarctic meteorological and ice-core records; however, many of the relationships tend not to be stable with time, and we currently have a poor understanding of the transfer functions by which such signals arrive at the Antarctic from the tropical Pacific.

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“…Although temperature is the key factor controlling the spatial distribution of stable isotopes in Antarctic snow, several other factors such as moisture origin and transport paths [27,28], precipitation seasonality/intermittency [29,30], and post depositional processes [31][32][33], might result in large uncertainty when reconstructing paleotemperature from ice cores. Precipitation falling in a target region over Antarctica usually receives moisture from several different oceanic source regions.…”

Section: Factors Controlling Spatial Distribution Of  D and  18 Omentioning

confidence: 99%

“…Thus, local -T temporal relationship is usually slowly weakened than the -T spatial relationship [29,41,57]. Western Vostok region 0.89±0.11 7.00 [52] Eastern Vostok region 0.89±0.039 5.84 [52] Antarctic Ice Sheet 0.80±0.01 6.34±0.09 [21] Furthermore, significant regional anomalies in stable isotopes usually occur, resulting from atmospheric circulation variability.…”

Section: Relationship Between the Stable Isotopic Composition (  ) mentioning

confidence: 99%

Climatology of stable isotopes in Antarctic snow and ice: Current status and prospects

2012

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Stable isotopic composition in Antarctic snow and ice is commonly regarded as one of invaluable palaeoclimate proxies and plays a critically important role in reconstructing past climate change. In this paper we summarized the spatial distribution and the controlling factors of D,  18 O, d-excess and 17 O-excess in Antarctic snow and ice, and discussed their reliability and applicability as palaeoclimate proxies. Recent progress in the stable isotopic records from Antarctic deep ice cores was reviewed, and perspectives on bridging the current understanding gaps were suggested. Antarctic Ice Sheet is a highly important part of the Earth system. Thanks to its extraordinary environment of very low temperature, extremely low snow accumulation rate and thick ice layer, a wealth of high resolution and long chronology paleoclimatic information is stored, and hence Antarctic Ice Sheet is honored as archives of the Earth's climate. Because the reliability of future climate prediction is, to a great degree, dependent on our knowledge of the past climatic evolution, Antarctic ice core records play an important role in the current global change studies. O in the Vostok and the EPICA Dome C ice cores have documented temperatures over the past 400 ka and 800 ka BP (before present), respectively [1-4], which well reflects the glacial-interglacial change. A drilling has successfully reached the bedrock at the Dome F site providing an ice core which covers more than 700 ka [5]. The robust couplings of dust-climate and CO 2 -climate over the glacial-interglacial timescales are also revealed by a comparison between   D (  18 O) and the corresponding dust and CO 2 records from the same ice cores, taking account of the ice core ice-age and gas-age difference [6][7][8]. These results contribute significantly to our understanding of the Earth's climatic and environmental evolution during Antarctic

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Atmospheric signals and characteristics of accumulation in Dronning Maud Land, Antarctica

Cited by 125 publications

References 53 publications

Eastern Antarctic Peninsula precipitation delivery mechanisms: process studies and back trajectory evaluation

Eastern Antarctic Peninsula precipitation delivery mechanisms: process studies and back trajectory evaluation

The El Niño–southern oscillation and Antarctica

Climatology of stable isotopes in Antarctic snow and ice: Current status and prospects

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