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Hanft, Valentin; Kleinschek, Ralph; Knapp, Marvin; Butz, André (2021): Column-averaged dry-air mole fractions of CO2, CH4, and CO from direct sunlight measurements above the Western North Pacific during the MR21-01 campaign 2021 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.937933

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Published: 2021-11-08 • DOI registered: 2021-12-23

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Abstract:
Measurements of atmospheric column-averaged dry-air mole fractions of carbon dioxide (XCO2), methane (XCH4), and carbon monoxide (XCO) have been collected across the Western North Pacific ocean during the Measuring Mirai MR21-01 campaign in February to March 2021. We deployed a ship-going variant of the EM27/SUN Fourier Transform Spectrometer (FTS) on board the Japanese research vessel 'Mirai' which, during MR21-01, followed a circular route starting and ending at Shimizu Port, Japan to the Western North Pacific. Equipped with a custom-built fast solar tracker, the FTS operated in direct-sun view during the ship cruise reliably delivering solar absorption spectra in the shortwave infrared spectral range 4000 to 11000 1/cm. After filtering and bias correcting the dataset, we report on XCO2, XCH4, and XCO measurements for 22 days. The dataset has been adjusted to the TCCON (Total Carbon Column Observing Network) station in Karlsruhe, Germany, before the MR21-01 campaign through side-by-side measurements. During the campaign the precision for hourly means is found 0.332 ppm, 1.545 ppb and 1.041 ppb for XCO2, XCH4, and XCO, respectively.
Keyword(s):
CH4; CO; CO2; Greenhouse gases; Oceanic References; Pacific; remote sensing
Supplement to:
Butz, André; Hanft, Valentin; Kleinschek, Ralph; Frey, Matthias Max; Müller, Astrid; Knapp, Marvin; Morino, Isamu; Agusti-Panareda, Anna; Hase, Frank; Landgraf, Jochen; Vardag, Sanam; Tanimoto, Hiroshi (2022): Versatile and Targeted Validation of Space-Borne XCO2, XCH4 and XCO Observations by Mobile Ground-Based Direct-Sun Spectrometers. Frontiers in Remote Sensing, 2, 775805, https://doi.org/10.3389/frsen.2021.775805
Related to:
Knapp, Marvin; Kleinschek, Ralph; Butz, André (2020): Column-averaged dry-air mole fractions of CO2, CH4, and CO from direct sunlight measurements above the Pacific during the MORE-2 campaign 2019 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.917240
Coverage:
Median Latitude: 28.686545 * Median Longitude: 141.111443 * South-bound Latitude: 24.960622 * West-bound Longitude: 134.021121 * North-bound Latitude: 43.999121 * East-bound Longitude: 155.001235
Date/Time Start: 2021-02-13T00:00:00 * Date/Time End: 2021-03-22T06:00:00
Event(s):
MR21-01-track * Latitude Start: 35.020000 * Longitude Start: 138.520000 * Latitude End: 35.020000 * Longitude End: 138.520000 * Date/Time Start: 2021-02-13T00:00:00 * Date/Time End: 2021-03-24T00:00:00 * Campaign: MR21-01 * Basis: Mirai * Method/Device: Underway cruise track measurements (CT) * Comment: Start and end of cruise: Shimizu port, Japan
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 DATE/TIMEDate/TimeHanft, ValentinGeocode – Time UTC, start of the 1-hour averaging interval
2 LONGITUDELongitudeHanft, ValentinGeocode
3 LATITUDELatitudeHanft, ValentinGeocode
4 Dry air column-averaged mixing ratio of carbon dioxideXCO2ppmvHanft, ValentinEM27/SUN - Fourier Transform Spectrometer
5 Dry air column-averaged mixing ratio of carbon dioxide, errorXCO2 err±Hanft, ValentinEM27/SUN - Fourier Transform Spectrometer
6 Dry air column-averaged mixing ratio of methaneXCH4ppmvHanft, ValentinEM27/SUN - Fourier Transform Spectrometer
7 Dry air column-averaged mixing ratio of methane, errorXCH4 err±Hanft, ValentinEM27/SUN - Fourier Transform Spectrometer
8 Dry air column-averaged mixing ratio of carbon monoxideXCOppbvHanft, ValentinEM27/SUN - Fourier Transform Spectrometer
9 Dry air column-averaged mixing ratio of carbon monoxide, errorXCO err±Hanft, ValentinEM27/SUN - Fourier Transform Spectrometer
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
912 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 
Date/Time		2 
Longitude		3 
Latitude		4 
XCO2 [ppmv]		5 
XCO2 err [±]		6 
XCH4 [ppmv]		7 
XCH4 err [±]		8 
XCO [ppbv]		9 
XCO err [±]
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