Interactive comment on “Calculations of automatic chamber flux measurements of methane and carbon dioxide using short time series of concentrations” by N. Pirk et al
نویسنده
چکیده
First, the authors should specify the exact meaning of “concentration” when this word is used within the manuscript, since density, molar fraction or mixing ratio are all measurements of concentration with different physical definitions. In this sense, it is important to realize that molar fraction should correspond to the molar ratio of carbon dioxide with reference to dry rather than moist air, to avoid erroneous flux estimates.
منابع مشابه
Calculations of automatic chamber flux measurements of methane and carbon dioxide using short time series of concentrations
The closed chamber technique is widely used to measure the exchange of methane (CH4) and carbon dioxide (CO2) from terrestrial ecosystems. There is, however, large uncertainty about which model should be used to calculate the gas flux from the measured gas concentrations. Due to experimental uncertainties the simple linear regression model (first-order polynomial) is often applied, even though ...
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The closed chamber technique is widely used to measure the exchange of methane (CH4) and carbon dioxide (CO2) from terrestrial ecosystems. There is, however, large uncertainty about which model should be used to calculate the gas flux from the measured gas concentrations. Due to experimental uncertainties the robust ::::: simple linear regression model (first order polynomial) is often applied,...
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