Navigation Links
Voyage to Southern Ocean aims to study air-sea fluxes of greenhouse gases
Date:2/26/2008

Scientists will embark this week from Punta Arenas, Chile, on the tip of South America, to spend 42 days amid the high winds and waves of the Southern Ocean. Here they hope to make groundbreaking measurements to explain how huge fluxes of climate-affecting gases move between atmosphere and sea, and vice-versa.

The cruise, which departs Feb. 28, should provide important information on how the greenhouse gas carbon dioxide moves between the ocean and atmosphere, said the cruises chief scientist, David Ho of Columbia Universitys Lamont-Doherty Earth Observatory. Comprising 30 percent of global seas, the Southern Ocean is a source of great uncertainty, he said. So its potentially important to our understanding of the global system.

Humans put about 6 billion metric tons of CO2 into the air each year, mainly by fossil-fuel burning and deforestation. About a third is thought to be absorbed by oceans, and a third by plants or other components of land. The rest stays in the airmuch of the reason why atmospheric CO2 is now building and climate is warming. However, there are huge uncertainties in the calculationsmade so far mostly through indirect means--and fluxes seem highly variable from year to year, with some parts of the oceans habitually giving up CO2 while others absorb it. (The Southern Ocean usually absorbs it.) "Understanding how atmospheric carbon dioxide reacts with these cold surface waters is important for determining how the ocean uptake of carbon dioxide will respond to future climate change, said Christopher Sabine, an oceanographer at the U.S. National Oceanic and Atmospheric Administration (NOAA). NOAA, NASA and the National Science Foundation are cosponsoring the cruise.

About 30 scientists from over a dozen institutions will traverse an area above Antarctica more than 1,000 miles east of Punta Arenas, aboard the 274-foot NOAA ship Ronald Brown. Here high, freezing winds unimpeded by landmasses roar much of the time, and waves can routinely top 30 feet. The conditions are a little grim, but its ideal for study, said Ho. He said that higher wind speeds correlate with faster exchange of gases, but there have been few studies aimed at directly measuring these exchanges under real-world conditions. The scientists say that wind speed itself probably does not drive gas exchange; the drivers are hard-to-observe phenomena driven by the wind, including turbulence and bubbles created by cresting waves. Another factor is the amount of phytoplankton taking CO2 from the water, which is usually measured by color. To figure out what is going on, the crew will dangle arrays of complicated instruments just above the water surface, and in the water column. That will be a challenge, since the bow will be plunging off those big waves, noted Sabine.

NASAs ongoing effort to understand the global carbon cycle will benefit from the data this cruise will produce, said Paula Bontempi, manager of NASAs ocean biology and biogeochemistry research program. "NASA's global satellite observations of ocean color will be improved, as we validate what our space-based sensors see with direct measurements taken at sea."


'/>"/>

Contact: Kevin Krajick
kkrajick@ei.columbia.edu
212-854-9729
The Earth Institute at Columbia University
Source:Eurekalert  

Related biology news :

1. Antarctic expedition provides new insights into the role of the Southern Ocean for global climate
2. Southern California institutions to collaborate on stem cell research
3. Climate change and life in the Southern Ocean
4. MIT Holding, Georgia Southern University, and MEVLABS successfully test the PROVECTOR
5. New southernpeas developed by ARS, cooperators
6. Climate change has major impact on oceans
7. Oceans fiercest predators now vulnerable to extinction
8. Valuing ocean services in the Gulf of Maine -- New approaches for conflict resolution
9. Map is first to track global human influences on ocean ecosystems
10. First map of threats to marine ecosystems shows all the worlds oceans are affected
11. Worlds largest marine protected area created in Pacific Ocean
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Voyage to Southern Ocean aims to study air-sea fluxes of greenhouse gases
(Date:6/14/2017)... , June 15, 2017  IBM (NYSE: IBM ) ... international tech event dedicated to developing collaboration between startups and ... on June 15-17. During the event, nine startups will showcase ... value in various industries. France ... the international market, with a 30 percent increase in the ...
(Date:5/16/2017)... May 16, 2017  Veratad Technologies, LLC ( www.veratad.com ... age and identity verification solutions, announced today they will ... 2017, May 15 thru May 17, 2017, in ... International Trade Center. Identity impacts the ... in today,s quickly evolving digital world, defining identity is ...
(Date:5/6/2017)... SINGAPORE , May 5, 2017 ... has just announced a new breakthrough in biometric ... that exploits quantum mechanical properties to perform ... new smart semiconductor material created by Ram Group ... across finance, entertainment, transportation, supply chains and security. ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... ... 10, 2017 , ... San Diego-based team building and cooking events company, Lajollacooks4u, ... The bold new look is part of a transformation to increase awareness, appeal ... growth period. , It will also expand its service offering from its signature gourmet ...
(Date:10/10/2017)... ... October 10, 2017 , ... For the second time ... US2020 STEM Mentoring Award. Representatives of the FirstHand program travelled to Washington, D.C. ... US2020. , US2020’s mission is to change the trajectory of STEM education in ...
(Date:10/10/2017)... International research firm Parks Associates announced today that Tom ... 2017 Annual Meeting , October 11 in Scottsdale, Arizona ... and how smart safety and security products impact the competitive landscape. ... Parks Associates: Smart Home Devices: Main Purchase Driver ... "The residential security market has experienced continued growth, and ...
(Date:10/10/2017)... ... October 10, 2017 , ... USDM ... firm for the life sciences and healthcare industries, announces a presentation by Subbu ... , The presentation, “Automating GxP Validation for Agile Cloud Platforms,” will present a ...
Breaking Biology Technology: