New Research On Apparent Off-Season Uptake of CO2

November 8, 2005

LI-COR presented research on apparent uptake of CO2 during the off-season shown by open-path CO2 analyzers at the 2005 Science Team Meeting for AmeriFlux on October 18-20 in Boulder, Colorado.

Results showed that energy dissipated in the analyzer head can heat a portion of the air in the optical path and cause measured levels of CO2 to decrease slightly. This effect is stronger when the vertical wind vector is upward, resulting in a systematic under-estimate of CO2 transport to the atmosphere and an apparent CO2 uptake.

As part of this research, a correction for the surface heating effect was proposed and tested. Results of this correction were very promising – most of the wrong signs of off-season CO2 flux rates were eliminated, and there was a significant improvement in off-season integrations of CO2 exchange. Further research is planned.

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LI-COR Biosciences is a leader in the design and manufacture of instrument systems for plant biology, biotechnology, and environmental research. LI-COR instruments for photosynthesis, carbon dioxide analysis and light measurement are recognized worldwide for standard-setting innovation in plant science research and environmental monitoring. The company pioneered the development of infrared fluorescence labeling and detection systems for proteomic and genomic research.

Founded in 1971, the privately held company is based in Lincoln, Nebraska, with subsidiaries in Germany and the United Kingdom. LI-COR systems are used in more than 100 countries and are supported by a global network of distributors.

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