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
Russian Federation
May 4, 02:20 (GMT + 9):
Russian Aquaculture doubles EBITDA but faces currency losses
Spain
May 4, 01:20 (GMT + 9):
Multi-year plan to safeguard jobs in fishing sector proposed
Japan
May 1, 08:00 (GMT + 9):
Recess on International Labour Day
United Kingdom
May 1, 04:00 (GMT + 9):
IN BRIEF - Droughts lead to California's biggest salmon hatchery driving millions of fish to the coast
Canada
May 1, 04:00 (GMT + 9):
IN BRIEF - N.S. investigation finds farmed fish died because of winter weather, not disease
United States
May 1, 04:00 (GMT + 9):
IN BRIEF - Fewer fish equal more money for commercial fishermen
United States
May 1, 03:50 (GMT + 9):
IN BRIEF - Proposed changes to US fishing laws spark conservation row
United Kingdom
May 1, 03:50 (GMT + 9):
IN BRIEF - Iglo has demonstrable success in conserving fish stocks
United States
May 1, 03:50 (GMT + 9):
IN BRIEF - Young proposes changes Magnuson Stevens Act
Viet Nam
May 1, 03:40 (GMT + 9):
IN BRIEF - Vinh Hoan Corp earns exports reached USD 58.3 million
United States
May 1, 03:40 (GMT + 9):
IN BRIEF - Groups decry record number of whale entanglements off U.S. West Coast
Belgium
May 1, 03:40 (GMT + 9):
IN BRIEF - Nominations for 2016 Seafood Champion Awards Open
Argentina
May 1, 02:50 (GMT + 9):
Long struggle for huge sum set by ruling against Lithuanian firm continues in US
Viet Nam
May 1, 01:50 (GMT + 9):
Vietnamese shrimp exports facing market challenges
Argentina
May 1, 00:30 (GMT + 9):
Underinvoicing of seafood exports investigated



Lenguaje
FEATURED EVENTS
  
TOP STORIES
Triton Group to invest in aquaculture to meet local fish demand
Nigeria Triton Group has committed to invest about USD 54 million over a period of five to seven years in the country’s local aquaculture production, as part of the government’s food import substitution programme.
Long struggle for huge sum set by ruling against Lithuanian firm continues in US
Argentina An Argentine entrepreneur has spent nearly two decades waiting for a Court in his country to execute the ruling that recognizes a million dollar debt contracted by a Lithuanian state company operating in Argentina.
Recess on International Labour Day
Japan Due to the celebration of International Labour Day, FIS.com will not update the News section on Friday, 1 May.
First open-ocean tilapia farm to get underway soon
Panama Aquasense Panama has begun site preparation at its Gulf of Panama ocean site in Panama, where the company plans to develop the seafood industry’s first-ever open-ocean project for farm-raised saltwater tilapia products for the US market.
 
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-
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 - 2015 Fish Info & Services Co.Ltd| All Rights Reserved.   DISCLAIMER