Oceanographic observations from George VI Ice Shelf, Antarctic Peninsula

first_imgSummer profiles of sea-water temperature, salinity and flow were obtained on George VI Ice Shelf near its northern ice front. At each depth, temperature salinity and density show little variation between sites. Their respective variation to 250 m depth confirms a linear temperature-salinity dependence. This is the first place in the world where observations confirm precisely the form of the T-S diagram predicted for fresh ice melting in sea-water. Both tidal and residual flow are small, except at the western margin of the ice front, where a strong outflow is concentrated immediately beneath the ice shelf. The observations lead to a simple circulation model for the ice-shelf regime. Warm Deep Water flows southwards into George VI Sound, replacing the colder water that spreads northwards in the surface outflow. Thermohaline exchanges beneath the ice shelf determine the salinity profile, which itself provides evidence of upwelling. Estimates can be made of the basal melt rate of the ice shelf. The rates vary from around 10 m a−1 at the ice front to an average value for the ice shelf of order 1 m a−1. The average value is consistent with earlier estimates from surveys of ice-shelf strain.last_img read more

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Geocaching Plans for July 13 and All of August? You Do Now…

first_imgEarn More Than 30 Souvenirs in August Start plotting your crafty strategy, rally your friends and prepare for a month of geocaching like no other. August is being celebrated by geocachers around the world as the “31 Days of Geocaching.” Find a geocache, log a “Found it” (or an “Attended” for an Event Cache) and earn a unique calendar-style Geocaching souvenir for each day in August. That’s 31 souvenirs up for grabs.Warming up for this month-long geocache fest will take more than planning. It’ll take practice. You can get ready for the 31 Days of Geocaching by earning the Geocaching Get Outdoors Day souvenir. You’ll only be able to earn it on this Saturday, July 13. The same rules apply. If you log a “Found it” or an “Attended” on July 13 you earn the souvenir seen in this newsletter for your Geocaching profile.The official Geocaching Get Outdoors Day souvenirTo prepare for this epic challenge, you should tap into some expert advice. Check out the Top 8 Tips for Maintaining Your Geocaching Streak post on The Geocaching Blog about planning for your geocaching streak. Spread the word about the 31 Days of Geocaching to your friends by attending the event on the Geocaching Facebook page. And keep watching the Geocaching Weekly Newsletter for more details about the August adventure, 31 Days of Geocaching.Share with your Friends:More SharePrint RelatedFAQs: The lost treasure of Mary HydeJuly 10, 2017In “Learn”Out with the old, in with these two new souvenirs!November 25, 2019In “News”31 Days of Geocaching Printable CalendarJuly 30, 2013In “Community”last_img read more

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Run With It

first_imgIndian captain M.S. Dhoni’s concern over fitness is understandable but to say the team lacks high levels of fitness is wrong. It’s almost like saying Indians do not know how to run between the wickets or take difficult catches. Even Sachin Tendulkar has taken some tough catches on the rope. I hope Indians remember that. The World Cup has just started warming up and fielding will make the difference. Fielding and fitness are two different issues and Dhoni’s boys are not exactly lagging behind, though I have read some genuine concerns about the side’s bowling abilities.Indian skipper M.S.Dhoni runs out Bradley Kruger of the Netherlands off a throw from Virat Kohli.For any team, fitness and fielding are issues that should come naturally because these are integral to a player’s success on the field. A failed batsman can participate in some excellent run-outs and a failed bowler can run fast to stop some extra runs. Both eventually matter. International cricket is full of such examples.Fielding in the subcontinent is a lot different from that seen in South Africa, Australia and England. The weather here tires you out in the later stages of the game. As the match progresses, the player feels the pressure. Often, he cannot keep his eyes on the ball because he sweats profusely and cannot grip some crucial catches because the palms give way.Dhoni has a number of young players who are super fit. The Indian Premier League, where one needs to be quick with anything and everything, has also helped the Indian team. The players must make quick runs, take quick wickets and then need to stop those extra runs. They must have high levels of fitness.advertisementMany have often argued that the big scores will help a side win the day. That’s not true. Runs saved will actually make the difference between win and loss. It again boils down to fitness. Dhoni is concerned because a few catches have been dropped and some runs lost. But that has not cost him a game. Indians are cruising safely. Let the boys enjoy their game.- Jonty Rhodes has played for South Africa in four World Cups, starting 1992. The fielding legend is now a consultant with Kenya for World Cup 2011 He spoke to Shantanu Guha Ray.last_img read more

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