World Ocean Database 2009
NOAA releases the World Ocean Database 2009. It is an update of the 2005 edition, and contains a collection of scientific information about the oceans with records dating as far back as 1800. It is part of NOAA's climate services, and provides "about 9.1 million temperature profiles and 3.5 million salinity reports. The 2009 database also captures 29 categories of scientific information from the oceans, including oxygen levels and chemical tracers, plus information on gases and isotopes that can be used to trace the movement of ocean currents." The news release is available here.