by Staff Writers
Greenbelt MD (SPX) Aug 07, 2012
This brilliant cyan pattern scattered across the surface of the Black Sea is a bloom of microscopic phytoplankton. The multitude of single-celled algae in this image are most likely coccolithophores, one of Earth's champions of carbon pumping.
Coccolithophores constantly remove carbon dioxide from the atmosphere and slowly send it down to the seafloor, an action that helps to stabilize the Earth's climate.
This image of this swirling blue bloom was captured on July 15, 2012, by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Aqua satellite. Note that the image is rotated so that north is to the right.
Ocean scientist Norman Kuring of NASA's Goddard Space Flight Center suggested the bloom was likely Emiliania huxleyi, though it is impossible to know the species for sure without direct sampling of the water.
Coccolithophores use carbon, calcium, and oxygen to produce tiny plates of calcium carbonate (coccoliths). Often called "stones" by researchers, coccoliths resemble hubcaps.
During their lifespan, coccolithophores remove carbon from the air, "fix" or integrate it into what is effectively limestone, and take it with them to the seafloor when they die and sink or when they are consumed (and eventually excreted) by zooplankton and fish.
These micro-stones are thought to speed up the ocean's biological pump, according to William Balch, a senior research scientist at the Bigelow Laboratory for Ocean Sciences and a member of the Suomi NPP science team.
Without this dense calcium carbonate ballast for sinking particles to the depths, less carbon dioxide would be drawn down into the ocean. The net result would be higher atmospheric concentrations of carbon dioxide.
But as Balch points out, the ever-increasing amount of carbon dioxide in our air could upset this biological pump. Excess carbon dioxide is making the ocean more acidic, which may change the conditions that promote coccolithophore growth.
"Ocean acidification is highly relevant to coccolithophores," said Balch.
"We are trying to understand if it would slow the ocean's biological pump by inhibiting coccolithophore calcification. If they can't calcify, they can't make their limestone plates that pull all the sinking particulate carbon to the seafloor."
Carbon Worlds - where graphite, diamond, amorphous, fullerenes meet
Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.
Earth absorbing more carbon, even as CO2 emissions rise
Boulder CO (SPX) Aug 07, 2012
Despite sharp increases in carbon dioxide emissions by humans in recent decades that are warming the planet, Earth's vegetation and oceans continue to soak up about half of them, according to a surprising new study led by the University of Colorado Boulder. The study, led by CU-Boulder postdoctoral researcher Ashley Ballantyne, looked at global CO2 emissions reports from the past 50 years and co ... read more
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2012 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement|