NASA New Discovery Rainforest In Arctic---NASA Discovers Unprecedented Blooms of Ocean Plant Life: Scientists have made a biological discovery in Arctic Ocean waters as dramatic and unexpected as finding a rainforest in the middle of a desert. A NASA-sponsored expedition punched through three-foot thick sea ice to find waters richer in microscopic marine plants, essential to all sea life, than any other ocean region on Earth.
The finding reveals a new consequence of the Arctic's warming climate and provides an important clue to understanding the impacts of a changing climate and environment on the Arctic Ocean and its ecology. The discovery was made during a NASA oceanographic expedition in the summers of 2010 and 2011.
The expedition called ICESCAPE, or Impacts of Climate on EcoSystems and Chemistry of the Arctic Pacific Environment, explored Arctic waters in the Beaufort and Chukchi seas along Alaska's western and northern coasts onboard a U.S. Coast Guard icebreaker. Using optical technologies, scientists looked at the impacts of environmental variability and change in the Arctic on the ocean biology, ecology and biogeochemistry.
"Part of NASA's mission is pioneering scientific discovery, and this is like finding the Amazon rainforest in the middle of the Mojave Desert," said Paula Bontempi, NASA's ocean biology and biogeochemistry program manager in Washington.
"We embarked on ICESCAPE to validate our satellite ocean-observing data in an area of the Earth that is very difficult to get to," Bontempi said. "We wound up making a discovery that hopefully will help researchers and resource managers better understand the Arctic."
The microscopic plants, called phytoplankton, are the base of the marine food chain. Phytoplankton were thought to grow in the Arctic Ocean only after sea ice had retreated for the summer.
Scientists now think that the thinning Arctic ice is allowing sunlight to reach the waters under the sea ice, catalyzing the plant blooms where they had never been observed.
The findings were published today in the journal Science. "If someone had asked me before the expedition whether we would see under-ice blooms, I would have told them it was impossible," said Kevin Arrigo of Stanford University in Stanford, Calif., leader of the ICESCAPE mission and lead author of the new study.
"This discovery was a complete surprise." During the July 2011 Chukchi Sea leg of ICESCAPE, the researchers observed blooms beneath the ice that extended from the sea-ice edge to 72 miles into the ice pack.
Ocean current data revealed that these blooms developed under the ice and had not drifted there from open water, where phytoplankton concentrations can be high.
The phytoplankton were extremely active, doubling in number more than once a day. Blooms in open waters grow at a much slower rate, doubling in two to three days. These growth rates are among the highest ever measured for polar waters.
Researchers estimate that phytoplankton production under the ice in parts of the Arctic could be up to 10 times higher than in the nearby open ocean.
Read more: NASA New Discovery Fainforest In Arctic
The finding reveals a new consequence of the Arctic's warming climate and provides an important clue to understanding the impacts of a changing climate and environment on the Arctic Ocean and its ecology. The discovery was made during a NASA oceanographic expedition in the summers of 2010 and 2011.
The expedition called ICESCAPE, or Impacts of Climate on EcoSystems and Chemistry of the Arctic Pacific Environment, explored Arctic waters in the Beaufort and Chukchi seas along Alaska's western and northern coasts onboard a U.S. Coast Guard icebreaker. Using optical technologies, scientists looked at the impacts of environmental variability and change in the Arctic on the ocean biology, ecology and biogeochemistry.
"Part of NASA's mission is pioneering scientific discovery, and this is like finding the Amazon rainforest in the middle of the Mojave Desert," said Paula Bontempi, NASA's ocean biology and biogeochemistry program manager in Washington.
"We embarked on ICESCAPE to validate our satellite ocean-observing data in an area of the Earth that is very difficult to get to," Bontempi said. "We wound up making a discovery that hopefully will help researchers and resource managers better understand the Arctic."
The microscopic plants, called phytoplankton, are the base of the marine food chain. Phytoplankton were thought to grow in the Arctic Ocean only after sea ice had retreated for the summer.
Scientists now think that the thinning Arctic ice is allowing sunlight to reach the waters under the sea ice, catalyzing the plant blooms where they had never been observed.
The findings were published today in the journal Science. "If someone had asked me before the expedition whether we would see under-ice blooms, I would have told them it was impossible," said Kevin Arrigo of Stanford University in Stanford, Calif., leader of the ICESCAPE mission and lead author of the new study.
"This discovery was a complete surprise." During the July 2011 Chukchi Sea leg of ICESCAPE, the researchers observed blooms beneath the ice that extended from the sea-ice edge to 72 miles into the ice pack.
Ocean current data revealed that these blooms developed under the ice and had not drifted there from open water, where phytoplankton concentrations can be high.
The phytoplankton were extremely active, doubling in number more than once a day. Blooms in open waters grow at a much slower rate, doubling in two to three days. These growth rates are among the highest ever measured for polar waters.
Researchers estimate that phytoplankton production under the ice in parts of the Arctic could be up to 10 times higher than in the nearby open ocean.
Read more: NASA New Discovery Fainforest In Arctic
