Welcome to FIS   Sponsored By
United States
Subscribe to FIS | Register with FIS | Advertise with FIS | Newsletter | About FIS | Contact us

Glacier at Prince William Sound. (Photo Credit: NOAA)

Melting glaciars may be intensifying acidification

Click on the flag for more information about United States UNITED STATES
Wednesday, July 09, 2014, 22:50 (GMT + 9)

Scientists from NOAA’s Pacific Marine Environmental Laboratory, the University of Alaska and the Alaska Ocean Observing System are teaming up this summer and early fall to use new unmanned tools to study how melting glaciers in Alaska’s Prince William Sound may be intensifying ocean acidification in the sound and on the Gulf of Alaska continental shelf.

The term “ocean acidification” describes the process of ocean water becoming more acidic as a result of absorbing nearly a third of the carbon dioxide released into the atmosphere from human sources. This change in ocean chemistry is making it difficult for marine organisms such as shellfish and corals to build and maintain shells and skeletons.

“The glacial melt water entering the sound has low concentrations of carbonate ion, which marine organisms need to build shells and skeletons,” said Jeremy Mathis, an oceanographer at NOAA’s Pacific Marine Environmental Laboratory. “When increasing amounts of this freshwater enter the sound, it makes surface water less hospitable for animals that build shells.”

Freshwater from glaciers is also low in carbon dioxide relative to marine waters. But when these waters enter the marine environment they quickly absorb carbon dioxide from the atmosphere to reach equilibrium, and this, in turn, contributes to increased acidity of the surface waters.

While scientists noted that Prince William Sound has had conditions conducive to ocean acidification for several decades, sparse sampling hindered their understanding of glacial runoff and other processes that are affecting the ecosystem. Now new autonomous gliders, adapted by PMEL scientists, allow researchers to survey large areas of the ocean for months at a time.

“Ships are incredibly expensive to operate so we may only get one or two chances a year to make an observation in a certain area,” Mathis said. “But with these new autonomous gliders, we can make thousands of measurements over several months.”

Earlier this spring, scientists launched two Carbon Wave Gliders and a Slocum underwater glider into the Gulf of Alaska to collect data for five months.

The Carbon Wave Gliders, which look and act like remotely-controlled surfboards, ride at the surface of the ocean, collecting data on water temperature, salinity, pH, dissolved oxygen and carbon dioxide in water and air. PMEL engineers worked with Liquid Robotics, the company that developed the Carbon Wave Glider, to add new data sensors to this glider. Scientists and engineers at PMEL pilot the gliders that are propelled by wave energy. Solar batteries power the sensors, which transmit real time data via satellite to the pilots.

The Slocum glider, which resembles a torpedo and was conceived by Douglas C. Webb, tracks ocean data down to 200 meters. It travels from a near shore ocean acidification buoy across the continental shelf and back. Scientists pilot the Slocum from PMEL as well. It provides data showing the downstream effects of melting glaciers and how freshwater changes the chemistry of the water column. This is the first time that these types of gliders have been used in the cold waters of Alaska.

“Understanding these unique processes will help us determine which species are at risk, not just in Prince William Sound, but up and down the coast of the Gulf of Alaska,” said Mathis. “This information can help Alaskan communities better prepare for and adapt to ecosystem changes that may affect important fisheries.”



Click to know how to advertise in FIS
New Caledonia
Oct 29, 02:30 (GMT + 9):
Pacific tuna stock tagging cruise finishes successfully
Oct 29, 02:20 (GMT + 9):
IN BRIEF - Center for Aquaculture Technologies Canada Receives AQC-3 Approval
Oct 29, 02:00 (GMT + 9):
Ross Sea marine park becomes protected area
United Kingdom
Oct 29, 01:10 (GMT + 9):
European GBP 2.5m funding to boost Scottish aquaculture
Oct 29, 00:20 (GMT + 9):
Chile and Guatemala agree on fishery and aquaculture cooperation
South Africa
Oct 29, 00:00 (GMT + 9):
IN BRIEF - Spar South Africa Promotes Sustainable Seafood
European Union
Oct 29, 00:00 (GMT + 9):
IN BRIEF - World's largest marine park created in Antarctic Ocean
United Kingdom
Oct 28, 23:50 (GMT + 9):
Scottish aquaculture strategy intends to double its economic contribution
European Union
Oct 28, 23:40 (GMT + 9):
IN BRIEF - EU proposes total commercial fishing ban on Atlantic sea bass
Palestinian Territories
Oct 28, 23:40 (GMT + 9):
IN BRIEF - Fishing zone expanded by 50% for Gaza’s 4,000 fishermen
Falkland Islands
Oct 28, 23:20 (GMT + 9):
Fishery sector contributes 40pc to Falklands' GDP after 30 years' development
Oct 28, 23:10 (GMT + 9):
Canning industry seeks to improve crustacean traceability and treatment
Russian Federation
Oct 28, 23:00 (GMT + 9):
IN BRIEF - Russia removed import duties on fish products
Oct 28, 23:00 (GMT + 9):
IN BRIEF - Major Victory for Protection of the Southern Ocean
Oct 28, 23:00 (GMT + 9):
IN BRIEF - Thrust on introduction of e-traceability for quality shrimp production

Galicia and Cape Verde strengthen fisheries ties
Spain The Undersecretariat of Marine Affairs of Galicia and the Government of Cape Verde pledged to strengthen commercial and fisheries ties.
Shrimp exports maintain a growing trend
Viet Nam Vietnamese shrimp exports maintained a growing trend thanks to the stable demand from major markets and to the global shrimp price also on the rise amid the decline in the global supply of the resource.
Vietnamese seafood exports forecast to exceed USD 7b this year
Viet Nam Vietnamese seafood exports are expected to reach USD 7 billion this year, a year-on-year increase of 5.5 per cent, according to the Viet Nam Association of Seafood Producers and Exporters.
Thai Union nominated for 2016 'Stop Slavery Award'
Thailand Thai Union has been nominated for Thomson Reuters Foundation's inaugural Stop Slavery Award in recognition to its efforts to ensure that those working in the industry at large are also protected.
Maruha Nichiro Corporation
Nichirei Corporation -Headquarter-
Pesquera El Golfo S.A.
Ventisqueros - Productos del Mar Ventisqueros S.A
Wärtsilä Corporation -Wartsila Group Headquarter-
ITOCHU Corporation -Headquarter-
BAADER - Nordischer Maschinenbau Rud. Baader GmbH+Co.KG (Head Office)
Inmarsat plc - Global Headquarters
Marks & Spencer
Tesco PLC (Supermarket) - Headquarters
Nueva Pescanova, S.L. - Group Headquarters
Sea Harvest Corporation (PTY) Ltd.
I&J - Irvin & Johnson Holding Company (Pty) Ltd.
Blue Continent Products (Pty) Ltd - (Oceana Group Limited)
Pesquera San Jose S.A.
Nutreco N.V. - Head Office
CNFC China National Fisheries Corporation - Group Headquarters
W. van der Zwan & Zn. B.V.
SMMI - Sunderland Marine Mutual Insurance Co., Ltd. - Headquarters
Icicle Seafoods Inc. -Headquarter-
Starkist Seafood Co. - Headquearters
Trident Seafoods Corp.
American Seafoods Group LLC - Head Office
Marel - Group Headquarters
SalMar ASA - Group Headquarters
Sajo Industries Co., Ltd
Hansung Enterprise Co.,Ltd.
BIM - Irish Sea Fisheries Board (An Bord Iascaigh Mhara)
CEFAS - Centre for Environment, Fisheries & Aquaculture Science
COPEINCA ASA - Corporacion Pesquera Inca S.A.C.
Chun Cheng Fishery Enterprise Pte Ltd.
Food Project (Siam) Co., Ltd.
VASEP - Vietnam Association of Seafood Exporters & Producers
Gomes da Costa
Furuno Electric Co., Ltd. (Headquarters)
NISSUI - Nippon Suisan Kaisha, Ltd. - Group Headquarters
FAO -Food and Agriculture Organization- Fisheries and Aquaculture Department (Headquarter)
Hagoromo Foods Co., Ltd.
Koden Electronics Co., Ltd. (Headquarters)
A.P. Møller - Maersk A/S - Headquarters
BVQI - Bureau Veritas Quality International (Head Office)
UPS - United Parcel Service, Inc. - Headquarters
Hamburg Süd Group - (Headquearters)
Armadora Pereira S.A. - Group Headquarters
NOAA - National Oceanic and Atmospheric Administration (Headquarters)
Omega Protein Corporation -Headquarter-
Marona S.A.
Marine Harvest ASA - Headquarters
Marubeni Europe Plc -UK-
Findus Ltd
Icom Inc. (Headquarter)
WWF Centroamerica
Oceana Group Limited
The David and Lucile Packard Foundation
Ajinomoto Co., Inc. -Headquarter-
Friosur S.A. - Headquarters
Cargill, Incorporated - Global Headquarters
Benihana Inc.
Leardini Pescados Ltda
Mitsubishi Corporation Marine Products Depts. D.Team
CJ Corporation  -Holding Headquarter-
Greenpeace International - The Netherlands
David Suzuki Foundation
Fisheries and Oceans Canada -Communications Branch-
Mitsui & Co.,Ltd - Headquarters
Ocean Trawlers Group - Ocean Trawlers HK Ltd.
Natori Co., Ltd.
Carrefour Supermarket - Headquarters
FedEx Corporation -Headquarter-
AKBM - Aker BioMarine ASA
Seafood Choices Alliance -Headquarter-
Austevoll Seafood ASA
Walmart / Wal-Mart Stores, Inc. (Supermarket) -Headquarter-
New Japan Radio Co.Ltd (JRC) -Head Office-
Gulfstream JSC
INVE Group - Head Office
Marine Stewardship Council - MSC Worldwide Headquarters
Royal Dutch Shell plc (Headquarter)
Genki Sushi Co.,Ltd -Headquarter-
Iceland Pelagic ehf
AXA Assistance Argentina S.A.
Caterpillar Inc. - Headquarters
Tiger Brands Limited
Morpol ASA - Group Headquarters
National Geographic Society
AmazonFresh, LLC - AmazonFresh

Copyright 1995 - 2016 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER