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News Release 13-139
Seasonal carbon dioxide range expanding as more is added to Earth's atmosphere
Northern Hemisphere land-based ecosystems "taking deeper breaths," scientists find
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The NSF/NCAR Gulfstream V aircraft in Anchorage, Alaska, as it takes part in the HIPPO study.
Credit: UCAR
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HIPPO, or HIAPER Pole-to-Pole Observations, scientists study Earth's carbon dioxide levels.
Credit: UCAR
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Air-sampling flasks used during HIPPO flights; researcher Andy Watt tends them.
Credit: UCAR
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Geoscientist Ralph Keeling replaces used flasks filled with air samples, with new flasks.
Credit: UCAR
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The Gulfstream V taxis into Anchorage after a HIPPO flight to the North Pole.
Credit: UCAR
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The researchers' findings are described in the Aug. 9, 2013, issue of the journal Science.
Credit: Copyright AAAS 2013
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