Powerboat-World.com
 
 
News Home Photo Gallery Video Gallery Newsletters Features
Sail-World.com : Antarctic sea ice cover increases under the effects of climate change
Antarctic sea ice cover increases under the effects of climate change

'Sea ice around Antarctica'    British Antarctic Survey ©

The first direct evidence that marked changes to Antarctic sea ice drift have occurred over the last twenty years, in response to changing winds, is published this week in the journal Nature Geoscience. Scientists from NERC’s British Antarctic Survey (BAS) and NASA’s Jet Propulsion Laboratory (JPL), Pasadena California explain why, unlike the dramatic losses reported in the Arctic, the Antarctic sea ice cover has increased under the effects of climate change.

Maps created by JPL using over five million individual daily ice motion measurements captured over a period of 19 years by four US Defense Meteorological satellites show, for the first time, the long-term changes in sea ice drift around Antarctica.

Lead author, Dr. Paul Holland of BAS says: 'Until now these changes in ice drift were only speculated upon, using computer models of Antarctic winds. This study of direct satellite observations shows the complexity of climate change. The total Antarctic sea-ice cover is increasing slowly, but individual regions are actually experiencing much larger gains and losses that are almost offsetting each other overall. We now know that these regional changes are caused by changes in the winds, which in turn affect the ice cover through changes in both ice drift and air temperature. The changes in ice drift also suggest large changes in the ocean surrounding Antarctica, which is very sensitive to the cold and salty water produced by sea-ice growth.

Dr Paul Holland - Ocean Modeller at British Antarctic Survey -  British Antarctic Survey ©  
'Sea ice is constantly on the move; around Antarctica the ice is blown away from the continent by strong northward winds. Since 1992 this ice drift has changed. In some areas the export of ice away from Antarctica has doubled, while in others it has decreased significantly.'

Sea ice plays a key role in the global environment — reflecting heat from the sun and providing a habitat for marine life. At both poles sea ice cover is at its minimum during late summer. However, during the winter freeze in Antarctica this ice cover expands to an area roughly twice the size of Europe. Ranging in thickness from less than a metre to several metres, the ice insulates the warm ocean from the frigid atmosphere above.

The new research also helps explain why observed changes in the amount of sea-ice cover are so different in the two Polar Regions. The Arctic has experienced dramatic ice losses in recent decades while the overall ice extent in the Antarctic has increased slightly. However, this small Antarctic increase is actually the result of much larger regional increases and decreases, which are now shown to be caused by wind-driven changes. In places, increased northward winds have caused the sea-ice cover to expand outwards from Antarctica. The Arctic Ocean is surrounded by land, so changed winds cannot cause Arctic ice to expand in the same way.

Dr. Ron Kwok, JPL says, 'The Antarctic sea ice cover interacts with the global climate system very differently than that of the Arctic, and these results highlight the sensitivity of the Antarctic ice coverage to changes in the strength of the winds around the continent.'

There has been contrasting climate change observed across the Antarctic in recent decades. The Antarctic Peninsula has warmed as much as anywhere in the Southern Hemisphere, while East Antarctica has shown little change or even a small cooling around the coast. The new research improves understanding of present and future climate change. It is important to distinguish between the Antarctic Ice Sheet — glacial ice — which is losing volume, and Antarctic sea ice — frozen seawater — which is expanding.

This research was funded by the Natural Environment Research Council (NERC) and National Aeronautics and Space Administration (NASA).

British Antarctic Survey website


by British Antarctic Survey

  

Click on the FB Like link to post this story to your FB wall

http://www.powerboat-world.com/index.cfm?nid=103823

5:49 PM Thu 15 Nov 2012GMT


Click here for printer friendly version
Click here to send us feedback or comments about this story.







Power Boat News - USA

Marine Auctions is proud to announce that they will be pioneering their 2015 auctions with live internet online bidding from around the world. This is a huge step for Marine Auctions who have cemented themselves at the forefront within the industry. ... [more]  

The overall Series may have already been secured, and they may have been testing new engines, but the Fazza pair of Arif Al Zaffain and Nadir bin Hendi simply couldn’t resist that top step of the podium at the Emirates Airline XCAT GP this afternoon. ... [more]  

Sail-World is now live testing the changed website format. If you are using this format for the first time, please scroll to the bottom of the site and check that your region is set for your region and not some other. It can be correctly set up using the drop down boxes. Then go to the top, click refresh, and you should be away. ... [more]  

The £2.9 million round the world record bid hopes to shave up to seven days off the current record of 60 days 23 hours 49 minutes, held by New Zealander Pete Bethune. It is lead is by British power boating legend Alan Priddy, in a new ‘torpedo’ boat that will pierce the waves, rather than surfing them. ... [more]  

In the 2014 Class 1 World Powerboat Championship Arif Al Zaffain and Nadir Bin Hendi delivered another racing master class to win race two of the Grand Prix of Abu Dhabi and claim Victory Team’s 14th World title. ... [more]  

2014 Class 1 World Powerboat Championship - The climax to the highly successful and competitive first season of the ‘new look’ ClassOne World Powerboat Championship combining C1 catamarans and V1 monohulls will decide the outcome of World titles in both categories. ... [more]  

Every year, thousands of people suffer from CFP, a poisoning syndrome caused by eating toxic reef fish. CFP symptoms are both gastrointestinal and neurological, bringing on bouts of nausea, vomiting, diarrhea, headaches, muscle aches, and in some cases, the reversal of hot and cold sensations. Some neurological symptoms can persist for days to months to years after exposure. ... [more]  

The new application from PredictWind for Mac and PC is revolutionary for accessing weather data when offshore. Accessing GRIB files, Weather Routing, GMDSS forecasts and Satellite Imagery is now a simple task with the unique and user friendly interface. ... [more]  

As an investment in a FLIR camera is not inexpensive or even one that can be taken quickly due to having to carefully think through the installation process, we thought long and hard about the perceived benefits of the system. At the end of the day we decided to go ahead with the FLIR camera and also decided, that we would pair the FLIR thermal camera with the new Furuno TZ9. ... [more]  

Some dogs were born for the water, others less so. The key to boating with dogs, says Boat Owners Association of The United States (BoatUS), is taking it slow and making safety number one. ... [more]  

Ensuring a safe fuel supply for America’s 12 million registered boat owners may have to wait, said Boat Owners Association of The United States (BoatUS) after the Environmental Protection Agency (EPA) announced today that the agency will further delay the final rule on how much ethanol refiners must blend into the nation’s gasoline supply under the federal Renewable Fuel Standard (RFS). ... [more]  

Garmin, the global leader in satellite navigation, has announced its next generation of open-array digital radars – the GMR™ 424, 624/626 and 1224/1226 xHD2. Continuing to set the standard for open-array radars, the xHD2 series offers brand new features and capabilities that provide better precision, targeting and performance while transmitting power at four, six and 12 kilowatts respectively. ... [more]  

Garmin Ltd has announced a new line of scanning transducers designed to accommodate any calibre of mariner, from the casual cruiser to the professional angler. Supporting both the newest lines of Garmin echoMAP and GPSMAP chartplotters and multifunction displays (MFD), this full array of thru-hull and transom-mounted transducers are a valuable addition to any vessel. ... [more]  

Volvo Penta today announced the introduction of the first two models of its next-generation sterndrive marine gasoline engines. The new 4.3-liter catalyzed V6 engines, rated at 200 and 240 horsepower, will supplement Volvo Penta’s current V6 product line. They debuted at the Marine Dealers Conference and Expo (MDCE) in Orlando, Fla., Nov. 16-19. ... [more]  

Rhode Island is the second most densely populated stateun the USA , and its 420 miles of coastline are crowded with homes and businesses, residents and tourists. The increasing rate of erosion and sea level rise, and the effects of coastal storms and flooding, are making the state’s coastal landscape ever smaller. ... [more]  

Garmin, the global leader in satellite navigation, has announced the GSD 25, a premium sonar module that offers traditional sonar, 1kW CHIRP, CHIRP DownVü and CHIRP SideVü scanning sonar for a versatile, all-in-one black box. The GSD 25 is the ultimate solution for the boater or angler that requires both scanning capabilities and traditional sonar. ... [more]  

The very versatile SUV collection from Riviera is set to scale even greater heights after the series flagship 565 model secured Best Motoryacht honours at the biggest boat show in the world. The prestigious Editors Choice awards for the ‘best of the best' in production and semi-custom yachts were announced at a special gala presentation during the Fort Lauderdale International Boat Show. ... [more]  

The 34th Super Boat International (SBI) Key West World Championships produced some of the most exciting racing seen in nearly a decade with the widest range of conditions and excitement. Miss GEICO won the Superboat Unlimited battle and took first overall during some high-flying action on this past Sunday. ... [more]  

Boat operators will be reminded the prescribed concentration of alcohol (PCA) is the same on the water as on our roads in a joint statewide Roads and Maritime Services and NSW Police campaign from tomorrow. ... [more]  

Auckland Airport has chosen an innovative Rayglass ProJet to help protect its flights from the possibility of bird strike. The airport’s Rayglass ProJet, named Kaitiaki Rangi or 'Guardian of the Skies', operates around the edges of the airport’s runways, scaring away the birds, especially swans, that sometimes congregate on the nearby banks ... [more]  

The Coast Guard Foundation announced today that it will offer scholarships for the education of qualifying spouses of Coast Guard members. The Coast Guard Foundation’s Spouse Education Grant program was established in 2010 as a way to support the higher education goals of husbands and wives of our enlisted Coast Guard members. ... [more]  

Nova Southeastern University (NSU) announced that Guy Harvey and the Guy Harvey Ocean Foundation are providing a very generous financial gift that will allow students, faculty and other researchers at NSU’s Oceanographic Center to enhance their work and also provide scholarships to undergraduate and graduate students studying marine biology. ... [more]  

Simrad Yachting has announced its new relationship with Chris-Craft. Under the terms of the agreement, dual Simrad NSO evo2 multi-touch, glass bridge navigation systems will be offered on the Catalina 34 model of Chris-Craft center console powerboats. ... [more]  

Intrepid Powerboats offers the first hybrid yacht from factory powered by Natural Gas, featuring fuel-system technology from Blue Gas Marine, Inc. to power its outboard motors. The Intrepid 327 Center Console boat will be on display at the Fort Lauderdale International Boat show this month. ... [more]  

NMMA loses E15 fuel U.S. Court of Appeals Decision by National Marine Manufacturers Association
While the battle in the U.S. over E15 might seem a local issue, its plainly has world-wide flow though for the recreationa marine market.The Engine Products Group, a coalition of organizations that includes NMMA, sought to block the EPA decision. ... [more]  

The organisers of METS have revealed that 45 products have been nominated to go forward for final judging by the jury of the prestigious Design Award METS (DAME) 2014 competition. The products have been selected from a total of 116 entries from 23 nationalities all over the world. ... [more]  

A panel of experts will offer critical suggestions on how post-Gulf of Mexico oil catastrophe research funds should be spent. The panel is just one of the key marine presentations at the Guy Harvey Fisheries Symposium at the University of South Florida St. Petersburg Campus. ... [more]  

Today, October 20th, Correct Craft announced it has acquired the companies who manufacture both PCM Marine Engines and Crusader Engines. The acquisition became effective on October, 16, 2014. Correct Craft, the owner of both Nautique Boat Company and Aktion Parks, now owns 100% of both PCM Marine Engines and Crusader Engines. ... [more]  

Boyan Slat is a 20-year-old on a mission - to rid the planet's oceans of floating plastic. He has dedicated his teenage years to finding a way of collecting it. But can the system really work - and is there any point when so much new plastic waste is still flowing into the sea every day? ... [more]  

Super Boat International (SBI) is proud to announce the addition of Marathon, Florida to their schedule on Fourth of July weekend, 2015. July 3rd – 5th, SBI and Conch Republic Offshore Powerboat Racing Association (CROPRA) will keep the tradition of racing on 4th of July and bring racing back to Marathon, Florida, where Superboats raced for years under and along the famous 7-Mile Bridge. ... [more]  

Celebrating the continued recovery of the boating industry, the Annapolis Boat Shows welcomes thousands of boaters to the 43rd United States Powerboat Show, running October 16 – 19, 2014. Rebounding from the 2008 recession, the Annapolis Powerboat Show has demonstrated a steady increase in exhibit space and attendance each of the past five years. ... [more]  

Reggie Fountain--a legend, a leader and a brand that still defines one of the most historic chapters of Powerboating history. The compelling story of offshore racer and boat builder Reggie Fountain--the man who revolutionized offshore racing with innovations in boat building that still influence the sport today--is told by American Performance Media in its new film documentary, King of Offshore. ... [more]  

Defending World Champions, the Qatar Team, based in Doha, head next week to Lakeland, Florida in the USA hoping to put a 'slam dunk' on the rest of the field of drivers as they prepare for the third round of the 2014 UIM F1 H2O World Championship on the 13-15 of November at their home circuit on Doha Bay in Doha, Qatar. ... [more]  

CUBAR Odyssey to host informational kick off dinner
Update: Stunning finds from ancient Greek Shipwreck
Teams preparing for Key West 2015 season
Marine Researchers and Educators benefit from Tortuga Music Festival
Coast Guard Foundation to honor Coast Guard heroics and excellence
Magnum Marine new 51 edition at Flibs 2014
Super Boat National Championships - Great conditions for sixth edition
US Coast Guard to drop the current life jacket type code scheme
Mercury Marine produces 75,000th Verado L6 outboard engine
$10,000 available for the best safe, clean boating outreach projects
Formula Two PROP Series Champs - Tammy Wolf racing second in series
British ocean adventuring legend launches round the world record bid
Powerboat P1 plans to take SuperStock and AquaX racing to Singapore
Insurance, towing and safety 'provisions' reminder for snowbirds
You scratched my seagrass!
RYA Advanced Powerboat Handbook unveiled at PSP Southampton Boat Show
Mediterranean Grand Prix - Pons and Chris win the titles
Mediterranean Grand Prix 2014 - Wins for Victory and Chaudron
What can you do to prevent electrocution and ESD?
Mediterranean Grand Prix - Powerboat racing heavyweights head to Ibiza
Mediterranean Grand Prix - World Aquabike stars all set   
Antarctic sea-level rising faster than global rate   
Fort Lauderdale International Boat Show - 13 things to See and do   
Blowsion Surf Slam to take place at Tierra Del Mar   
P1 USA AquaX race series action heats up   
Super Boat International double header a huge Success   
Helping boaters understand weather basics   
Polar research: Six priorities for Antarctic science   
Bivalves' ability to clean chemicals from waterways   
Coast Guard Foundation hosts Alaska Awards Dinner   
77 Lucas Oil SilverHook leads Superboat Unlimited class   
Sustainable Seafood - How to purchase with confidence   
John Wilson has sights set on second P1 SuperStock title   
Torquay Grand Prix - Pertemps tops table on penultimate day   
Coast Guard Foundation to honor Coast Guard in Alaska   
Great Lakes Grand Prix - Team Broadco wins Superboat Class   
Capt. George Walker is ready to assist Lake Champlain boaters   
If all else fails read the instructions!!   
If all else fails read the instructions!!   
Gift presented to Coast Guard Training Center in Cape May   


For this week's complete news stories select    Last 7 Days
   Search All News
For last month's complete news stories select    Last 30 Days
   Archive News







Sail-World.com  


















Switch Default Region to:

Social Media

Asia

Australia

Canada

Europe

New Zealand

United Kingdom


http://www.sail-world.com/event_images/image/Twitter_logo_small.png   http://www.sail-world.com/event_images/image/RSS-Icon.png

United States

Cruising Northern

Cruising Southern

MarineBusiness World

PowerBoat World

FishingBoating World

 

Contact

Commercial

News

Search

Contact Us

Advertisers Information

Submit news/events

Search Stories/Text

Feedback

Advertisers Directory

Newsletter Archive

Photo Gallery

 

Banner Advertising Details

Newsletter Subscribe

Video Gallery

Policies

 

 

 

Privacy Policy

 

 


Cookie Policy

 

 



This site and its contents are © Copyright TetraMedia and/or the original author, photographer etc. All Rights Reserved.  Photographs are copyright by law.  If you wish to use or buy a photograph contact the photographer directly.
XLXL NEW PBW US
LocalAds   DE  ES  FR  IT