scholarly journals Acceleration of snow melt in an Antarctic Peninsula ice core during the twentieth century

2013 ◽  
Vol 6 (5) ◽  
pp. 404-411 ◽  
Author(s):  
Nerilie J. Abram ◽  
Robert Mulvaney ◽  
Eric W. Wolff ◽  
Jack Triest ◽  
Sepp Kipfstuhl ◽  
...  
Keyword(s):  
Twentieth Century ◽  
Antarctic Peninsula ◽  
Ice Core ◽  
Snow Melt

scholarly journals 200-Hundred Year Climate Record From Antarctic Peninsula

1990 ◽  
Vol 14 ◽  
pp. 353-353
Author(s):  
D.A. Peel ◽  
R. Mulvaney
Keyword(s):  
Antarctic Peninsula ◽  
Ice Core ◽  
Weddell Sea ◽  
Average Temperature ◽  
Air Temperatures ◽  
Isotope Record ◽  
James Ross Island ◽  
Weather Stations ◽  
Isotopic Records ◽  
Reported Data

A stable isotope record extending back to 1795 is now available from Dolleman Island (70°35.2′S, 60°55.5′W), a small ice rise on the Weddell Sea coast of Antarctic Peninsula. An accurate chronology has been achieved by combined stratigraphic analysis of clear seasonal cycles in δ18O and excess SO4. Previous work (Peel and others, 1988) has shown that, since 1947, there is generally a satisfactory correlation between interannual variations in δ18O and air temperature (T) as recorded at weather stations in various parts of the region, suggesting that the derived δ18O/T ratio may be used to reconstruct air temperatures for the earlier period.Taken together with previously-reported data (Aristarain and others, 1986) for an ice core from James Ross Island it is now possible to propose a regional climatic signal for the Weddell Sea coastal sector of the region. The most striking feature is a broad maximum in δ18O for the mid-19th century, implying decadal average temperature at least as high as the present. This contrasts with available evidence from elsewhere in the southern hemisphere which suggest that this period was cooler than today. Tentative explanations for the anomaly are proposed based on evidence for a period (1974–80), where climatic shifts are clearly amplified in the isotopic records.

scholarly journals Ice core evidence for significant 100-year regional warming on the Antarctic Peninsula

2009 ◽  
Vol 36 (20) ◽  
Author(s):  
E. R. Thomas ◽  
P. F. Dennis ◽  
T. J. Bracegirdle ◽  
C. Franzke
Keyword(s):  
Antarctic Peninsula ◽  
Ice Core ◽  
Regional Warming ◽  
The Antarctic

scholarly journals Ice-Core Evidence For Weddell Sea Ice Extent During The Past 200 Years

1990 ◽  
Vol 14 ◽  
pp. 350
Author(s):  
R. Mulvaney ◽  
A.P. Reid ◽  
D A. Peel
Keyword(s):  
Climate Change ◽  
Sea Ice ◽  
Antarctic Peninsula ◽  
Seasonal Cycle ◽  
Global Climate ◽  
Ice Core ◽  
Weddell Sea ◽  
Sea Ice Extent ◽  
Storm Activity ◽  
The Core

A continuous, detailed, 200-years record of the anionic species, chloride, nitrate and sulphate, has been measured on an ice core from Dolleman Island (70°35.2′ S, 60°55.5′ W), Antarctic Peninsula. The site lies on the east coast of the Peninsula, and the chemistry of the core is dominated by the changing pattern of sea-ice distribution and storm activity in the Wed dell Sea. Strong annual cycles in chloride and non sea salt sulphate reflect the dominance of the seasonal cycle in sea-ice distribution in the Weddell Sea, observed in time series derived from satellite imagery since the early 1970s. However, in the case of chloride there is also an exceptionally strong interannual variability, which in many parts of the core dominates the seasonal cycle. Secular variations in the sea-ice extent appear to have a strong influence on the climate of the region and may play a major role in determining how long-term climate change in the Antarctic Peninsula relates to global climate change. The paper examines documented evidence for sea-ice extent in the Weddell Sea sector, and evaluates the usefulness of ice-core data for reconstructing this parameter in the earlier period.

scholarly journals Recent increase in Antarctic Peninsula ice core uranium concentrations

2016 ◽  
Vol 140 ◽  
pp. 381-385 ◽  
Author(s):  
Mariusz Potocki ◽  
Paul A. Mayewski ◽  
Andrei V. Kurbatov ◽  
Jefferson C. Simões ◽  
Daniel A. Dixon ◽  
...  
Keyword(s):  
Antarctic Peninsula ◽  
Ice Core ◽  
Recent Increase

Decadal timescale links between Antarctic Peninsula ice-core oxygen-18, deuterium and temperature

The Holocene ◽  
1993 ◽  
Vol 3 (1) ◽  
pp. 14-26 ◽  
Author(s):  
P.D. Jones ◽  
R. Marsh ◽  
T.M.L. Wigley ◽  
D.A. Peel
Keyword(s):  
Antarctic Peninsula ◽  
Ice Core ◽  
Decadal Timescale

scholarly journals Reconstruction of annual accumulation rate on firn synchronizing H<sub>2</sub>O<sub>2</sub> concentration data with an estimated temperature record

2021 ◽  
Author(s):  
Jandyr M. Travassos ◽  
Saulo S. Martins ◽  
Mariusz Potocki ◽  
Jefferson C. Simões
Keyword(s):  
Antarctic Peninsula ◽  
Accumulation Rate ◽  
Ice Core ◽  
Mathematical Optimization ◽  
Time Frame ◽  
Data Series ◽  
Temperature Record ◽  
Time Warping ◽  
Concentration Data ◽  
Dynamic Time

Abstract. This work deals with two distinct datasets, a well preserved H2O2 concentration data from firn cores at a high deposition location and a temperature time series, estimated from the daily records from four Antarctic stations around the Antarctic Peninsula. With them we have produced a time scale, an ice–core chronology, for the 133  deep borehole DP-07-1 from Plateau Detroit, Antarctic Peninsula. We constructed the chronology through a non-linear pairing transformation of the two series, based entirely on mathematical optimization, compensating the peroxide frequency scaling, reflecting the gradual thinning of the annual firn layers with depth. We resorted to a dynamic time warping algorithm to find an optimal alignment between the two data series, allowing for the thinning of the annual firn layers with depth and the estimation of their original thicknesses at time of deposition. The core chronology spanning from Jan-1980 to Dec-2010 for the borehole reach, a time frame of a mere 30 years period, revealing a fairly stable 11 year average for the accumulation rate of 2.5 m w.e./y.

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