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The Use of FTIR-Spectrometry
in Combination with Different
Biosphere-Atmosphere Flux Measurement
Techniques
Hella van Asperen, Thorsten Warneke and Justus Notholt
Abstract Qualitative biosphere-atmosphere
flux measurements are of great
importance for future climate predictions. Multiple
fl
ux measurement techniques
exist, all having its own advantages and disadvantages. We present a method
wherein FTIR-spectrometry is connected to a
fl
ux
chambers, which enables us to study different (greenhouse) gases and different
ecosystem scales simultaneously. The method was tested in a peatland in Northern
Germany (Himmelmoor, Quickborn). The application of the method, detection
limits and
fl
flux gradient system and to
fl
first results are presented and the application of the method is evaluated.
The results showed that the different techniques capture different ecosystem pro-
cesses, therefore complementing each other. We believe that the developed method
could be valuable for
field campaigns and can help further improve our under-
standing of biosphere-atmosphere gas exchange dynamics.
Keywords FTIR-spectrometry
Biosphere-atmosphere gas exchange
Field
measurements
Flux measurement techniques
Carbon dioxide
1 Introduction
The understanding of the greenhouse gas
fluxes and their response to a changing
climate is vital for future climate predictions. Greenhouse gas
fl
uxes between the
biosphere and atmosphere can be obtained via a top-down approach, modeling the
exchange based on spatial and temporal concentration-variation in the atmosphere,
and by a bottom-up approach, the upscaling of
fl
eld
measurements of biosphere-atmosphere gas exchange. Field measurements are of
fl
flux estimates, e.g. from
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