Apparent Seasonal Cycle in Isotopic Discrimination of Carbon in the Atmosphere and Biosphere Due to Vapor Pressure Deficit
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چکیده
منابع مشابه
Novel Applications of Carbon Isotopes in Atmospheric CO2: What Can Atmospheric Measurements Teach Us About Processes in the Biosphere?
Conventionally, measurements of carbon isotopes in atmospheric CO2 (δ CO2) have been used to partition fluxes between terrestrial and ocean carbon pools. However, novel analytical approaches combined with an increase in the spatial extent and frequency of δCO2 measurements allow us to conduct a global analysis of δCO2 variability to infer the isotopic composition of source CO2 to the atmosphere...
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[1] The isotopic anomaly of oxygen in atmospheric CO2 is caused by exchange reactions with isotopically anomalous O(D) in the middle atmosphere. In the stratosphere, the major source of O(D) is O3 photolysis; O3 is known to possess mass-independent isotopic composition, with dO3 dO3 100% relative to atmospheric O2. Higher in the mesosphere, Lyman a-driven photodissociation of O2 provides a more...
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تاریخ انتشار 2017