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Lichenometry on Adelaide Island, Antarctic Peninsula : size-frequency studies, growth rates and snowpatches


first_imgThis paper presents new lichenometric population data from the Antarctic Peninsula (67°S), and describes a new approach to lichen growth-rate calibration in locations where dated surfaces are extremely rare. We use historical aerial photography and field surveys to identify sites of former perennial snowpatches where lichen populations now exist. As an independent check on lichen mortality by snowkill, and the timing of snow patch disappearance, we use a positive-degree day (PDD) approach based on monthly climate data from Rothera Research Station. We find that maximum growth rates for lichens <40 mm in diameter on Adelaide Island are around 0.8 mm/yr. Furthermore, we propose that our combined methodology may be more widely applicable to the Polar Regions where the construction of lichenometric dating (age-size) curves remains a problem.last_img read more


Carver out to exploit fan unrest


first_img That is a run Carver is determined to extend to add to the 3-2 victory Newcastle claimed over the Toffees at St James’ Park on December 28, and he knows his cause could be aided by the kind of disquiet on the terraces he witnessed in midweek. He said: “I’ve got to be honest, I was scared. It was pretty daunting. I was there with Steve Stone and Dave Watson, an Everton legend, and he’d never seen that before. He found it quite strange. “They came out with great credit, showing character by coming back to win and coming out at the other end dominating the game and deserving to win.” Victory was clinched by Romelu Lukaku’s nerveless late penalty, and Carver is well aware of the threat the Belgium international poses having seen him score three times in as many appearances for Everton against the Magpies. He said: “Lukaku is a threat, he’s a big strong lad. He wasn’t cheap, he didn’t cost two balloons and a goldfish. “He did a fantastic job at West Brom and we’ve got to make sure we contain that threat.” Newcastle will travel to Goodison with their squad once again depleted by injury and suspension with midfielder Mehdi Abeid having joined a lengthy casualty list with a thigh problem and Papiss Cisse beginning his seven-match ban. However, Jack Colback is available after sitting out the last two games following his 10th booking of the season, and fellow midfielder Remy Cabella has shaken off a knee problem. The Magpies’ head coach was on Merseyside on Thursday evening to see Roberto Martinez’s men come from behind to secure a 2-1 first-leg lead to take into their return trip to Dynamo Kiev next week, when a Europa League quarter-final place is at stake. However, their domestic form has been less than impressive in recent weeks and they currently sit in 14th place in the Barclays Premier League table having won just one of their last 12 games. John Carver is hoping to take advantage of any unrest at Goodison Park as Newcastle attempt to complete a double over Everton. center_img Press Associationlast_img read more


New female champs to be crowned today


first_imgTHERE will be new female champions crowned today, as that segment of the 2019 ExxonMobil U-14 schools football tournament concludes at the Ministry of Education ground. New Campbellville will oppose East Ruimveldt in the battle for the trophy from 15:00hrs.Both teams have been outstanding in the tournament so far and the final truly comprises two very good teams.Meanwhile Charlestown Secondary can hope for only third place when they play the playoff against Tucville from 14:00hrs.The Boys’ segment also continues with the semi-final from 12:00hrs.Queenstown Secondary will do battle against Cummings Lodge in the first semi, with Carmel Secondary looking to get by Dolphin Secondary in the second semi.Apart from title sponsors ExxonMobil, the tournament is sponsored by the Ministry of Public Health Chronic Diseases Department and Demerara Distillers Limited under the Pepsi Brand.last_img read more




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