Application of open-path spectroscopic measurement techniques (FTIR) for the up-scaling of greenhouse gas emissions from soils

verfasst von: Klaus Schäfer, Carsten Jahn, Michael Wiwiorra, Anja Schleichardt, Stefan Emeis, Armin Raabe, Jürgen Böttcher, Nils Demian Landmeyer, Christoph Bonecke, Marcus Deurer, Carolin Von Der Heide, Daniel Weymann
Abstract: The path-averaging, multi-component Fourier Transform Infrared (FTIR) absorption spectrometry at an open path of 100 m length is applied for the up-scaling of greenhouse gas (GHG) flux measurements from soil surfaces. For the detection of the emissions of N₂O and further GHG from arable field soils a measuring tunnel for controlled enrichment of released gases was installed at the soil surface covering an area of 495 or 306 m². The concentrations of GHG were measured by FTIR across the whole measuring tunnel. The precision of the FTIR system is discussed to detect the concentration increases during a time period of up to two hours. During a 2-years-time frame the N₂O fluxes between the soil and the atmosphere at the agricultural field varied between 1.0 and 21 μg N₂O-N m ^-2 h^-1. A non-intrusive emission and flux measurement method at a scale from 100 m up to 27.000 m² on the basis of the fluxgradient method (0.50 and 2.70 m height above surface) was developed and tested by means of FTIR (N₂O and further GHG concentrations) and area averaging meteorological measurements (determination of horizontal winds and friction velocity using acoustic tomography). To detect the concentration gradient between the two heights the precision of the FTIR system is discussed. Two campaigns in October 2007 and June 2008 were performed with this new methodology when wind speeds were low. The measurement errors are discussed and the results compared with the measurement tunnel results that were higher by up to 25 %.
Organisationseinheit(en): Institut für Bodenkunde
AG Bodenbiophysik
Externe Organisation(en): Karlsruher Institut für Technologie (KIT)
Universität Leipzig
Georg-August-Universität Göttingen
Typ: Aufsatz in Konferenzband
Publikationsdatum: 2009
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Elektronische, optische und magnetische Materialien, Physik der kondensierten Materie, Angewandte Informatik, Angewandte Mathematik, Elektrotechnik und Elektronik
Elektronische Version(en): https://doi.org/10.1117/12.830434 (Zugang: Unbekannt)

BibTeX

@inproceedings{6eb805d0fe044e31b8236b8f6dc1ab1e,
title = "Application of open-path spectroscopic measurement techniques (FTIR) for the up-scaling of greenhouse gas emissions from soils",
abstract = "The path-averaging, multi-component Fourier Transform Infrared (FTIR) absorption spectrometry at an open path of 100 m length is applied for the up-scaling of greenhouse gas (GHG) flux measurements from soil surfaces. For the detection of the emissions of N2O and further GHG from arable field soils a measuring tunnel for controlled enrichment of released gases was installed at the soil surface covering an area of 495 or 306 m2. The concentrations of GHG were measured by FTIR across the whole measuring tunnel. The precision of the FTIR system is discussed to detect the concentration increases during a time period of up to two hours. During a 2-years-time frame the N2O fluxes between the soil and the atmosphere at the agricultural field varied between 1.0 and 21 μg N2O-N m -2 h-1. A non-intrusive emission and flux measurement method at a scale from 100 m up to 27.000 m2 on the basis of the fluxgradient method (0.50 and 2.70 m height above surface) was developed and tested by means of FTIR (N2O and further GHG concentrations) and area averaging meteorological measurements (determination of horizontal winds and friction velocity using acoustic tomography). To detect the concentration gradient between the two heights the precision of the FTIR system is discussed. Two campaigns in October 2007 and June 2008 were performed with this new methodology when wind speeds were low. The measurement errors are discussed and the results compared with the measurement tunnel results that were higher by up to 25 %.",
keywords = "Flux gradient method, FTIR, Greenhouse gas emissions, Measuring tunnel",
author = "Klaus Sch{\"a}fer and Carsten Jahn and Michael Wiwiorra and Anja Schleichardt and Stefan Emeis and Armin Raabe and J{\"u}rgen B{\"o}ttcher and Landmeyer, {Nils Demian} and Christoph Bonecke and Marcus Deurer and {Von Der Heide}, Carolin and Daniel Weymann",
note = "Copyright: Copyright 2009 Elsevier B.V., All rights reserved.; Remote Sensing of Clouds and the Atmosphere XIV ; Conference date: 31-08-2009 Through 01-09-2009",
year = "2009",
doi = "10.1117/12.830434",
language = "English",
isbn = "9780819477804",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Remote Sensing of Clouds and the Atmosphere XIV",
}