'First Light' Taken by NASA's Newest CERES Instrument
The CERES results help scientists to determine the Earth’s energy balance, providing a long-term record of this crucial environmental parameter that will be consistent with those of its predecessors.
Thick cloud cover tends to reflect a large amount of incoming solar energy back to space (blue/green/white image), but at the same time, reduce the amount of outgoing heat lost to space (red/blue/orange image). Contrast the areas that do not have cloud cover (darker colored regions) to get a sense for how much impact the clouds have on incoming and outgoing energy.
Credit: NASA/NOAA/CERES Team
In the longwave image, heat energy radiated from Earth (in watts per square meter) is shown in shades of yellow, red, blue and white. The brightest-yellow areas are the hottest and are emitting the most energy out to space, while the dark blue areas and the bright white clouds are much colder, emitting the least energy. Increasing temperature, decreasing water vapor, and decreasing clouds will all tend to increase the ability of Earth to shed heat out to space.
Credit: NASA/NOAA/CERES Team
CERES arrived in space Oct. 28, 2011, carried by NASA’s newest Earth-observing satellite, the recently renamed Suomi National Polar-orbiting Partnership, or Suomi NPP.
Instrument cover-opening activities began on the instrument at 10:12 a.m. Eastern time Jan. 26, an operation that took about three hours. The “first light” process represented the transition from engineering checkout to science observations. The next morning CERES began taking Earth-viewing data, and on Jan. 29 scientists produced an image from the scans.
“It’s extremely gratifying to see the CERES FM-5 instruments on Suomi NPP begin taking measurements. We’re continuing the legacy of the most accurate Earth radiation budget observations ever made,” said CERES project scientist Kory Priestley, of NASA’s Langley Research Center in Hampton, Va.
“It has taken an incredible team of engineers, scientists, data management and programmatic experts to get CERES to this point,” he said.
Langley Research Center has led both the ERBE and CERES experiments and provided stewardship of these critical climate observations.
For 27 years without a break, the instruments collectively have returned a vast quantity of precise data about the solar energy reflected and absorbed by Earth, the heat the planet emits, and the role of clouds in that process.
“CERES monitors minute changes in the Earth’s energy budget, the difference between incoming and outgoing energy,” said CERES principal investigator Norman Loeb, of Langley Research Center.
“Any imbalance in Earth’s energy budget due to increasing concentrations of heat trapping gases warms the ocean, raises sea level, and causes increases in atmospheric temperature,” Loeb said. “Amassing a long record of data is important in order to understand how Earth’s climate is changing in response to human activities as well as natural processes.”
How It Works
In addition to observing changes in Earth’s radiation budget, scientists are also monitoring changes in clouds and aerosols, which strongly influence Earth’s radiation budget.
“Clouds both reflect sunlight and block energy from radiating to space,” Loeb said. “Which of these two effects dominates depends upon the properties of clouds, such as their amount, thickness and height.”
“As the Earth’s environment evolves, cloud properties may change in ways that could amplify or offset climate change driven by other processes. Understanding the influence of clouds on the energy budget is therefore a critical climate problem.”
The four other CERES instruments are in orbit on NASA’s Aqua and Terra satellites.
Overall Mission
The five-instrument suite on Suomi NPP collects and distributes remotely sensed land, ocean, and atmospheric data to the meteorological and global Earth system science research communities. The mission will provide atmospheric and sea surface temperatures, humidity sounding, land and ocean biological productivity, cloud and aerosol properties, total/profile ozone measurements, and monitor changes in the Earth’s radiation budget.
NASA’s Goddard Space Flight Center in Greenbelt, Md., manages the Suomi mission for the Earth Science Division of the Science Mission Directorate at NASA Headquarters in Washington. The National Oceanic and Atmospheric Administration’s Joint Polar Satellite System (JPSS) program provides the satellite ground system and NOAA provides operational support. Suomi NPP commissioning activities are expected to be completed by March.
NASA Langley manages the CERES experiment with additional contracted support from Science Systems and Applications, Inc. The TRW Space & Electronics Group in Redondo Beach, Calif., now owned by Northrop Grumman Aerospace Systems, built all of the CERES instruments.
Contacts and sources:
Michael Finneran
NASA Langley Research Center
More information:
› Suomi NPP Mission
› CERES page
› Q&A With CERES Principal Investigator
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