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.”


editorial@fis.com
www.fis.com


 Print


Click to know how to advertise in FIS
MORE NEWS
Canada
Oct 21, 07:10 (GMT + 9):
IN BRIEF - Neptune and BlueOcean Sign Licensing Agreement
Iceland
Oct 21, 07:10 (GMT + 9):
IN BRIEF - Competition Authority Sues Transport Companies
China
Oct 21, 07:10 (GMT + 9):
IN BRIEF - Haikui Seafood subsidiary signs relocation agreement with Dongshan authorities
Worldwide
Oct 21, 04:30 (GMT + 9):
Antarctic ecosystem protection hindered by nations’ tensions
Spain
Oct 21, 03:50 (GMT + 9):
Agreement between Moroccan and Spanish fishermen to fish in Gibraltar
Australia
Oct 21, 03:10 (GMT + 9):
New levy proposed to combat oyster disease
East Timor
Oct 21, 02:40 (GMT + 9):
International help to boost aquaculture development
Mexico
Oct 21, 01:50 (GMT + 9):
Baja California chamber rejects sardine fishing draft bill
Netherlands
Oct 21, 01:10 (GMT + 9):
SHV offers EUR 2.7 billion for Nutreco
United States
Oct 20, 23:50 (GMT + 9):
DiCaprio Foundation donates USD 2 million to combat overfishing, ocean conservation
Chile
Oct 20, 23:30 (GMT + 9):
PescaChile would be taken over by Friosur for USD 45 million
Canada
Oct 20, 22:40 (GMT + 9):
Large scale commercial fisheries restricted in Beaufort Sea
Spain
Oct 20, 22:10 (GMT + 9):
Spanish crew sanctioned for illegal foreign fishing vessel
Norway
Oct 20, 21:50 (GMT + 9):
IN BRIEF - MHG - Presentation of the Q3 2014 results 22 October at 08:00 (CET)
Netherlands
Oct 20, 21:40 (GMT + 9):
IN BRIEF - SHV and Nutreco announce a recommended cash offer of EUR 40 per share for all shares of Nutreco



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Seafood labelling campaign raises controversial views
Australia Several conservationists, scientists, fishermen and fish-lovers have teamed up to urge Australian authorities to follow the EU on seafood labelling laws whereas certain caterers and importers question the move.
DiCaprio Foundation donates USD 2 million to combat overfishing, ocean conservation
United States The Leonardo DiCaprio Foundation provided USD 2 million to Oceans 5, an international funders’ collaborative dedicated to stopping overfishing and establishing marine reserves in the world’s five oceans.
First federal offshore mussel aquaculture project to get underway
United States The first shellfish aquaculture project permitted in federal waters off the US east coast is expected to begin operating next spring.
Conservationists condemn Malta’s request to raise bluefin tuna quota
Malta Malta's government’s intention to be granted bluefin tuna quota increase has not been welcomed by conservation organization WWF and by the coalition of Maltese NGOs Fish4tomorrow.
 
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 (Head Office)
Inmarsat plc - Global Headquarters
Marks & Spencer
Tesco PLC (Supermarket) - Headquarters
Pescanova, S.A. - Group Headquarters
Sea Harvest Corporation (PTY) Ltd.
I&J - Irvin & Johnson Limited
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 ehf - 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-
Grupo Calvo - Luis Calvo Sanz, S.A. (Group 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
SeaChoice
National Geographic Society
AmazonFresh, LLC - AmazonFresh

Copyright 1995 - 2014 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER