Navigation Links
University of Hawaii at Manoa researchers reveal ocean acidification at Station ALOHA
Date:8/6/2009

The burning of fossil fuels has released tremendous amounts of the greenhouse gas carbon dioxide (CO2) into the atmosphere, significantly impacting global climate. Were it not for the absorption of CO2 by the oceans, the alarming growth of atmospheric CO2 concentration would be substantially greater than it is. However, this beneficial role of the oceans as a CO2 "scrubber" does not come without undesired consequences. When dissolved, CO2 acts as an acid, and lowers seawater pH. Since the beginning of the industrial age, CO2-driven acidification of the surface oceans has already caused a 0.1 unit lowering of pH, and models suggest that another 0.3 pH unit drop by the year 2050 is likely. Continued acidification of the sea may have a host of negative impacts on marine biota, and has the potential to alter the rates of ocean biogeochemical processes.

Despite the global environmental importance of ocean acidification, there are few studies of sufficient duration, accuracy and sampling intensity to document the rate of change of ocean pH and shed light on the factors controlling its variability. In 1988, Dave Karl and Roger Lukas of the School of Ocean, Earth Science and Technology (SOEST) at the University of Hawai'i at Mānoa founded the Hawaii Ocean Time-series (HOT) program, in part to establish a long-term record of the oceanic response to rising atmospheric CO2. Monthly research cruises to Station ALOHA, north of Oahu, have yielded after 20 years the most detailed record to date on ocean acidification in the Pacific. Reporting in this week's issue of Proceedings of the National Academy of Sciences, lead author and former SOEST researcher John Dore (now at Montana State University) presents an analysis of the changes of pH at Station ALOHA over time and depth. Dore, along with SOEST co-authors Karl, Lukas, Matt Church and Dan Sadler, found that over the two decades of observation, the surface ocean grew more acidic at exactly the rate expected from chemical equilibration with the atmosphere. However, that rate of change varied considerably on seasonal and inter-annual timescales, and even reversed for one period of nearly five years. The year-to-year changes appear to be driven by climate-induced changes in ocean mixing and attendant biological responses to mixing events. The authors also found distinct layers at depth in which pH declines were actually faster than at the surface. Dore and colleagues attribute these strata of elevated acidification rates to increases in biological activity and to the intrusion at Station ALOHA of remotely formed water masses with different chemical histories.


'/>"/>

Contact: Tara Hicks Johnson
hickst@hawaii.edu
808-956-3151
University of Hawaii at Manoa
Source:Eurekalert  

Related biology news :

1. University of Toronto helps to barcode the worlds plants
2. University has grand designs to build a house of straw
3. EPA grant to University of Chicago for research on food allergy triggers
4. University of Minnesota research leads to new technology to protect human health
5. Iowa State University researchers develop process for surgical genetic changes
6. University of Miami receives stimulus funds for study of hurricane impacts on structures, ecosystems
7. Promising new treatment for Alzheimers suggested based on Hebrew University research
8. Kornberg Associates Architects Selected to Develop Design for New Stanford University Imaging Center
9. University of Hawaii at Manoa professor published in science journal
10. University of Leicester researchers discover new fluorescent silicon nanoparticles
11. Environmental cues control reproductive timing and longevity, University of Minnesota study shows
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
University of Hawaii at Manoa researchers reveal ocean acidification at Station ALOHA
(Date:1/31/2017)... Jan. 31, 2017  Spero Therapeutics, LLC, a ... the treatment of bacterial infections, today announced it ... candidates from Pro Bono Bio Ltd (PBB) to ... multi-drug resistant forms of Gram-negative bacteria.   The assets ... Ltd, a PBB group company. "The ...
(Date:1/24/2017)... , Jan. 24, 2017 Biopharm ... of the laboratory use of nuclear magnetic resonance ... experienced end-users and profiled current practices, developments, trends ... as well as growth and opportunities. These areas ... suppliers, NMR instruments, needs and innovation requirements, hyphenated ...
(Date:1/19/2017)... , Jan. 19, 2017 ... user experience and security for consumer electronics, and ... payment processing systems and cybersecurity solutions, today announced ... enterprises and financial institutions worldwide to bolster security ... the end-to-end secure user authentication platforms they offer, ...
Breaking Biology News(10 mins):
(Date:2/17/2017)... ... February 17, 2017 , ... Academy of Model ... world’s leading maker of unmanned aircraft systems (UAS), are launching a joint program ... drones effectively, and support educational outreach efforts. , AMA and DJI will collaborate ...
(Date:2/16/2017)... ... February 16, 2017 , ... Avomeen & MichBio will be hosting ... be held at Avomeen Analytical Services (4840 Venture Dr., Ann Arbor, Michigan 48108). ... provide an opportunity to interact with peers, make new connections and talk bio biz. ...
(Date:2/16/2017)... PALM BEACH, Fla. , Feb. 16, 2017 ... diagnostics company revolutionizing the development of liquid biopsy ... it has entered into an exclusive license agreement ... will distribute MDNA,s proprietary liquid biopsy test for ... South Korea . This is ...
(Date:2/16/2017)...   Capricor Therapeutics, Inc. (NASDAQ: ... first-in-class biological therapies for cardiac and other medical ... terminate its license agreement with the Mayo Clinic ... "Our decision to return these rights ... efforts to advance our core cell and exosome-based ...
Breaking Biology Technology: