1000 year ice-core records from Berkner Island, Antarctica

first_imgTwo medium-depth ice cores were retrieved from Berkner Island by a joint project between the Alfred-Wegener-Institut and the British Antarctic Survey in the1994/95 field season. A151mdeep core from the northern dome (Reinwarthho«he) of Berkner Island spans 700 years, while a 181m deep core from the southern dome (Thyssenho«he)spans approximately 1200 years. Both cores display clear seasonal cycles in electrical conductivity measurements, allowing dating by annual-layer counting and the calculation of accumulation profiles. Stable-isotope measurements (both d18O and dD), together withthe accumulation data, allow us to estimate changes in climate for most of the past millennium: the data show multi-decadal variability around a generally stable long-term mean. In addition, a full suite of major chemistry measurements is available to define the history ofaerosol deposition at these sites: again, there is little evidence that the chemistry of the sites has changed over the past six centuries. Finally, we suggest that the southern dome, with an ice thickness of 950m, is an ideal site from which to gain a climate history of the late stages of the last glacial and the deglaciation for comparison with the records from the deep Antarcticice cores, and with other intermediate-depth cores such as Taylor Dome and Siple Dome.last_img read more

Laudrup backs Davies for bright future

first_img Left-back Davies, 19, has excelled for the Swans since being thrust into the first team when Neil Taylor suffered a broken ankle back in September. He has gone on to make 43 appearances for club and country, showing admirable composure and solidity throughout his first experience of senior football. Davies is a natural centre back and Laudrup believes that is where his long-term future lies, saying: “If you see him now he is much stronger – although maybe in some minds over here he lacks some height – and I think in time he can be a good left-footed centre-back.” He added: “He is getting stronger in the air, physically as well, and left-footed centre-backs are difficult to find, look how many sides play with two right-footed centre-backs.” Taylor is getting ever closer to his first-team return from his horrific ankle injury, and Laudrup plans to give him an appearance before the end of the season. But for next season he will consider Taylor and Davies as his two left-back options, despite their ability to play other positions. Taylor, in particular, impressed at right-back when playing for Team GB at last summer’s Olympics. He said: “I see them as two left-backs. For a great part of the season we have spoken about the lack of alternatives in certain positions but never at left-back, even though we only had one all season. “We brought in Dwight Tiendalli after Neil got injured, but he is right-footed and is better at right back. “We have only had one left-footed left-back for the whole season so next season I want two for each position and I see them as two left-backs.” Michael Laudrup believes Ben Davies has the attributes to become a top Premier League centre-half.center_img Press Associationlast_img read more