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ESPO supported the NOAA-led Southern Ocean Gas Exchange Experiment (GasEx), which was conducted on the Research Vessel Ronald H. Brown in the South Atlantic Ocean in 2008. ESPO provided management and logistic support to the NASA-funded scientific investigators on the mission. The NASA portion of the GasEx mission was under the direction of Dr. Paula Bontempi, the Ocean Biology and Biogeochemistry Program Manager in NASA's Science Mission Directorate.

The mission began with the departure of the Ron Brown from Punta Arenas, Chile on February 28, 2008, and arrival in Montevideo, Uruguay on April 9, 2008. For more information, go to the GasEx mission Web site.

The GaxEx project website is hosted at http://duck-rabbit.ldeo.columbia.edu/so_gasex