The latest from NASA's Earth Observatory (15 April 2014)

Latest Images: http://earthobservatory nasa gov/IOTD/

• Five Volcanoes Erupting at Once http://earthobservatory nasa gov/IOTD/view php?id=83502&src=eoa-iotd

• Wildfire Burns Valparaiso, Chile http://earthobservatory nasa gov/IOTD/view php?id=83498&src=eoa-iotd

• Grand Canyon Geology Lessons on View http://earthobservatory nasa gov/IOTD/view php?id=83495&src=eoa-iotd

• Tehuano Winds http://earthobservatory nasa gov/IOTD/view php?id=83483&src=eoa-iotd

• Cyclone Ita Approaching Australia http://earthobservatory nasa gov/IOTD/view php?id=83486&src=eoa-iotd

• Kilauea Lava Chews Through More Forest http://earthobservatory nasa gov/IOTD/view php?id=83472&src=eoa-iotd

• Arctic Sea Ice Maximum 2014 http://earthobservatory nasa gov/IOTD/view php?id=83451&src=eoa-iotd

• Kansas Prairie Fires http://earthobservatory nasa gov/IOTD/view php?id=83477&src=eoa-iotd

Recent Blog Posts: http://earthobservatory nasa gov/blogs/

Earth Matters * Aerial View of Kahauale‘a 2 http://earthobservatory nasa gov/blogs/earthmatters/?p=4649&src=eoa-blogs

Notes from the Field * Sampling the Global Ocean and a Note on Ocean Acidification One of the greatest tools used by oceanographers today for measuring ocean processes is the CTD CTD stands for Conductivity, Temperature and Depth Conductivity is a measure of ocean salinity The parameters collected and analyzed during CLIVAR campaigns includes, but is not limited to: salinity, oxygen, nutrients, chlorofluorocarbons (CFCs), dissolved inorganic carbon (DIC), total alkalinity, pH, dissolved organic carbon (DOC), helium, and tritium http://earthobservatory nasa gov/blogs/fromthefield/?p=5949&src=eoa-blogs

• Stormy weather and radiometry don't mix In spite of the rough weather, the FSG fellows have taken advantage of some calmer days to deploy a radiometer A radiometer measures apparent optical properties or AOPs AOPs describe how the light is entering and exiting the water column Remember that sunlight contains a whole spectrum of colors that are determined by their wavelength The character of the light that is reflected back out of the water can be different than what went in More specifically, the wavelengths or colors that are reflected back out are the colors that were not absorbed or scattered forward http://earthobservatory nasa gov/blogs/fromthefield/?p=5902&src=eoa-blogs