Science Source Feb 2010
  • 30,00 EUR

    Making print for private purpose, storage in computer memory, no distribution rights.

  • 40,00 EUR

    Strictly for editorial, single use on a personal (nonprofit) web site, Internet portal, social media (Facebook, Instagram etc.), blog for 1 year. Not for resale. Maximum picture size 2000px.

  • 75,00 EUR

    Strictly for editorial, single use on a commercial web site, Internet portal, social media (Facebook, Instagram etc.), blog for 1 year. Not for resale. Maximum picture size 2000px.

  • 90,00 EUR

    Strictly for editorial, single use, inside of newspaper, magazine, book (including digital version), one edition, one single country. Not for resale.

Gross prices
Contact us to calculate price for another use. Prices only for online sales.
A flash of blue and green lit the waters off Namibia in early November 2007 as a phytoplankton bloom grew and faded in the Atlantic Ocean. The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Aqua satellite captured this photo-like image on November 8, 2007. The bloom stretches from north to south along hundreds of kilometers, though it is brightest in the center of this image. Such blooms are common in the coastal waters off southwest Africa where cold, nutrient-rich currents sweep north from Antarctica and interact with the coastal shelf. At the same time, the easterly trade winds push surface water away from the shore, allowing water from the ocean's floor to rise to the surface, bringing with it iron and other material. The suffusion of nutrients from both the currents and upwelling water creates an environment where tiny surface-dwelling ocean plants (phytoplankton) thrive. Phytoplankton blooms are so abundant off Namibia that their death and decomposition often robs the water of dissolved oxygen. As the plants die, they sink to the ocean floor where bacteria consume them. There is so much plant material that the bacteria use all of the oxygen available in the water before they finish breaking down the plants, creating a dead-zone in the water where fish can't survive. Anaerobic bacteria, which don't require oxygen, take over in the decomposition process, releasing sulfur dioxide as a byproduct. The sulfur dioxide interacts with the ocean water to create solid sulfur and hydrogen sulfide, a poisonous gas, which eventually erupts to the surface, sometimes killing fish. Though no eruption is readily apparent in this image, hydrogen sulfide eruptions are often visible in satellite imagery because the solid sulfur colors the water a milky yellow-green. The bloom shown here persisted over several days. It first became distinct on October 28 (though clouds covered the region on previous days, so it may have developed earlier) and was just beginning to
Science Source Feb 2010
2010-02-13
EAST NEWS
Science Source
NASA
bj4966
2,83MB
34cm x 46cm by 300dpi
2007, 28, ABUNDANT, AERIAL, AFRICA, ALL, ALLOWING, ALONG, AN, ANAEROBIC, AND, ANTARCTICA, APPARENT, AQUA, ARE, AS, AT, ATLANTIC, AVAILABLE, AWAY, BACTERIA, BECAME, BECAUSE, BEFORE, BEGINNING, BLOOM, BLOOMS, BLUE, BOTH, BREAKING, BRIGHTEST, BRINGING, BYPRODUCT, CAN, CAPTURED, CENTER, CLOUDS, COASTAL, COLD, COLORS, COMMON, CONSUME, COVERED, CREATE, CREATES, CREATING, CURRENTS, DAYS, DEAD-ZONE, DEATH, DECOMPOSITION, DEVELOPED, DIE, DIOXIDE, DISSOLVED, DISTINCT, DON, DOWN, EARLIER, EARLY, EASTERLY, ENVIRONMENT, ERUPTION, ERUPTIONS, ERUPTS, EVENTUALLY, FADED, FINISH, FIRST, FISH, FLASH, FLOOR, FROM, GAS, GREEN, GREW, HAVE, HERE, HUNDREDS, HYDROGEN, IMAGE, IMAGERY, IMAGING, IN, INTERACT, INTERACTS, IRON, IS, IT, JUST, KILLING, KILOMETERS, LIFE, LIT, MARINE, MATERIAL, MAY, MILKY, MODERATE, MODIS, MUCH, NAMBIA, NAMIBIA, NASA, NO, NORTH, NOVEMBER, NUTRIENT-RICH, NUTRIENTS, OCEAN, OCTOBER, OF, OFF, OFTEN, ON, OTHER, OVER, OXYGEN, PERSISTED, PHOTO-LIKE, PHOTOGRAPHY, PHYTOPLANKTON, PLANT, PLANTS, POISONOUS, PREVIOUS, PROCESS, PUSH, READILY, REGION, RELEASING, REQUIRE, RESOLUTION, RISE, ROBS, SAME, SATELLITE, SEVERAL, SHELF, SHORE, SHOWN, SINK, SO, SOLID, SOMETIMES, SOUTH, SOUTHWEST, SPECTRORADIOMETER, STRETCHES, SUCH, SUFFUSION, SULFIDE, SULFUR, SURFACE, SURFACE-DWELLING, SURVIVE, SWEEP, TAKE, THAT, THE, THEM, THERE, THEY, THIS, THOUGH, THRIVE, TIME, TINY, TO, TRADE, UPWELLING, USE, VISIBLE, WAS, WATER, WATERS, WHERE, WHICH, WINDS, WITH, YELLOW-GREEN,