A portable reflected-sunlight spectrometer for CO2 and CH4

• Verfasst von: Löw, Benedikt [VerfasserIn]
• Verfasst von: Kleinschek, Ralph [VerfasserIn]
• Verfasst von: Enders, Vincent [VerfasserIn]
• Verfasst von: Sander, Stanley P. [VerfasserIn]
• Verfasst von: Pongetti, Thomas J. [VerfasserIn]
• Verfasst von: Schmitt, Tobias [VerfasserIn]
• Verfasst von: Hase, Frank [VerfasserIn]
• Verfasst von: Kostinek, Julian [VerfasserIn]
• Verfasst von: Butz, André [VerfasserIn]
• Titel: A portable reflected-sunlight spectrometer for CO2 and CH4
• Verf.angabe: Benedikt A. Löw, Ralph Kleinschek, Vincent Enders, Stanley P. Sander, Thomas J. Pongetti, Tobias D. Schmitt, Frank Hase, Julian Kostinek, and André Butz
• E-Jahr: 2023
• Jahr: 3 November 2023
• Umfang: 20 S.
• Illustrationen: Illustrationen
• Fussnoten: Gesehen am 02.08.2024 ; Im Titel ist "2" und "4" tiefgestellt
• Titel Quelle: Enthalten in: Atmospheric measurement techniques
• Ort Quelle: Katlenburg-Lindau : Copernicus, 2008
• Jahr Quelle: 2023
• Band/Heft Quelle: 16(2023), 21 vom: Nov., Seite 5125-5144
• ISSN Quelle: 1867-8548
• DOI: doi:10.5194/amt-16-5125-2023
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1897562020

Abstract

Mapping the greenhouse gases (GHGs) carbon dioxide (CO2) and methane (CH4) above source regions such as urban areas can deliver insights into the distribution and dynamics of local emission patterns. Here, we present the prototype development and an initial performance evaluation of a portable spectrometer that allows for measuring CO2 and CH4 concentrations integrated along a long (> 10 km) horizontal path component through the atmospheric boundary layer above a target region. To this end, the spectrometer is positioned at an elevated site from which it points downward at reflection targets in the region, collecting the reflected sunlight at shallow viewing angles. The path-integrated CO2 and CH4 concentrations are inferred from the absorption fingerprint in the shortwave-infrared (SWIR) spectral range. While mimicking the concept of the stationary California Laboratory for Atmospheric Remote Sensing - Fourier Transform Spectrometer (CLARS-FTS) in Los Angeles, our portable setup requires minimal infrastructure and is straightforward to duplicate and to operate in various locations.