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State of the art Greenhouse gas and Trace gas measurements at Lutjewad, Groningen Measuring CO 2, CH 4, CO, N 2 O, SF 6 and 222 Radon to determine their atmospheric concentrations and source/sink functions PhD research outline by Sander van der Laan Center for Isotope Research, Groningen 16 December 2005
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Lutjewad, Groningen
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Research goals To quantify the fluxes of CO 2, CH 4 and N 2 O using eddy covariance, radon and gradient measurements To monitor atmospheric concentrations of CO 2, CH 4, CO, N 2 O, SF 6
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Measurement site Highly interesting/complex measuring site North: 0.5 km reclamation area with salt tolerant grasses 10 km mostly tidal flat area (distance to schiermonnikoog) South: Cropland/grassland
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Measurement site
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North/North-West (Wadden Sea) North Mostly tidal flats North-West More open water
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Measurement site South/South-east Mostly (cropland/grassland) Important parameters: Land use, harvest, cattle, fertilization, crop density
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Planned measurements at Lutjewad Atmospheric concentration measurements of CO 2, CH 4, CO, N 2 O, SF 6 (GC) at 3 different heights (gradient) 222 Radon concentrations (radon detector) 222 Radon flux measurements (radon flux chambers) CO 2 flux measurements (eddy covariance) CO 2, CH 4 and N 2 O flux measurements (radon/gradient) O 2 concentration measurements (oxzilla) In short:
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Available Equipment/data Modified Agilent 6890N gas chromatograph Concentrations of CO 2, CH 4, CO, N 2 O, SF 6 At 7 m, 40 m and 60 m
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Available Equipment/data
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Eddy covariance (CO 2 flux measurements) Licor 7500 CO 2 /H 2 O analyzer Gill 3D-sonic T15 wind meter
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Average fluxes during 3 weeks of measurements, all wind directions CO 2 uptake (growth period) Preliminary measurements
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1/2 Hr average CO 2 fluxes during 3 weeks of measurements, Land Inversion layer effect Preliminary measurements
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1/2 Hr average CO 2 fluxes during 3 weeks of measurements, Sea Preliminary measurements
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Available Equipment/data 222 Radon activity detector Radon concentrations 222 Radon- and CO 2 flux chambers Radon flux measurements
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Available Equipment/data mBq/m 3 N W S O N
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Available Equipment/data 14 C isotope measurements ( 14 C/CO ratio) Meteo data (wind direction, rain, temperature, solar radiation) Agricultural data, sea-water level, soil research
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Questions/ suggestions for research
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Available Equipment/data mBq/m 3 N W S O N
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