Open-path dual-comb spectroscopy for multispecies trace gas detection in the 4.5-5 ¬µm spectral region

Giorgetta, Fabrizio R.; Peischl, Jeff; Herman, Daniel I.; Ycas, Gabriel; Coddington, Ian; Newbury, Nathan R.; Cossel, Kevin C.

doi:10.1002/lpor.202000583

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Open-path dual-comb spectroscopy for multispecies trace gas detection in the 4.5-5 ¬µm spectral region

2021
By Giorgetta, Fabrizio R. ; Peischl, Jeff ; Herman, Daniel I. ; ...
Source: Laser & Photonics Reviews 2021, 15, 2000583

[PDF-2.02 MB]

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Journal Title:

Laser & Photonics Reviews
Personal Author:

Giorgetta, Fabrizio R. ; Peischl, Jeff ; Herman, Daniel I. ; Ycas, Gabriel ; Coddington, Ian ; ... More +

Giorgetta, Fabrizio R. ; Peischl, Jeff ; Herman, Daniel I. ; Ycas, Gabriel ; Coddington, Ian ; Newbury, Nathan R. ; Cossel, Kevin C. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CSL (Chemical Sciences Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences)

OAR (Oceanic and Atmospheric Research) ; CSL (Chemical Sciences Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences) Less -
Description:

Open-path dual-comb spectroscopy provides multispecies atmospheric gas concentration measurements with high precision. Here, open-path dual-comb spectroscopy is extended to the mid-infrared 5 µm atmospheric window, enabling atmospheric concentration retrievals of the primary greenhouse gases, N2O, CO2, and H2O, as well as the criteria air pollutants O3 and CO across 600 m and 2 km round-trip paths. Measurements are demonstrated over a five-day period at 2 min temporal resolution with 80% uptime. The achieved precision is sufficient to resolve the atmospheric concentration variations of the multiple gas species; retrieved dry mixing ratios of CO and N2O are in good agreement with a colocated point sensor. In addition, the retrieved ratio of excess CO versus CO2 agrees with similar urban studies but disagrees with the US National Emission Inventory by a factor of 3. The retrieved ratio of excess N2O versus CO2 exhibits a plume-dependent value, indicating the variability of sources of the greenhouse gas N2O.
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Greenhouse Gases Spectrum Analysis Trace gas
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Laser & Photonics Reviews 2021, 15, 2000583
DOI:

https://doi.org/10.1002/lpor.202000583
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Journal Article
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urn:sha256:7c9261f4d38218d33a9691301019f901ce015ae53591dd657fe8bcb73aa5dc54
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https://repository.library.noaa.gov/view/noaa/41000/noaa_41000_DS1.pdf
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Open-path dual-comb spectroscopy for multispecies trace gas detection in the 4.5-5 ¬µm spectral region

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