*1 The version number is indicated in the name of each data file.
*2 As the reference date, please indicate the date you downloaded the files.
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Data of atmosphere carbon dioxide monitoring using volunteer observing ship (TRANS HARMONY 1) servicing between Japan and Southeast Asia. This data contains the cruise track, carbon dioxide variables at the sea level atmosphere, parameters of atmosphere (temperature, sea level pressure) .
Creator
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Release date
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2023/04/25
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Temporal coverage
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2018/03/22 - 2019/05/12
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Data provider
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NIES
Email: cgerdb_admin(at)nies.go.jp |
DOI
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File format
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Data volume
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2 MB
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Version
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ver.1.0 (Last updated: 2023/04/25)
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Language
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English
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Publications using this data set
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Niwa, Y., Ishijima, K., Ito, A., and Iida, Y (2022) Toward a long-term atmospheric CO2 inversion for elucidating natural carbon fluxes: technical notes of NISMON-CO2 v2021.1. Prog Earth Planet Sci 9, 42, doi:10.1186/s40645-022-00502-6.
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Handling precautions
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This data set only removes anomalous values caused by malfunctions of observation equipment, and would contain high-concentration CO2 data caused by emissions from the ship itself. Therefore, we ask that users process the data by themselves based on statistical methods or other parameter changes, and kindly request that users utilize the data just after the processing.
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Parameters
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Calibrated atmospheric CO2, Temperature, Calibrated atmospheric pressure at sea level, O3
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Time resolution
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10 minutes
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Precision
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0.1 ppm
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Observation period
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2018/02/21 - 2019/05/13
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Location
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Latitude: 10°S-40°N
Longitude: 100°E-140°E |
Measurement method |
Air is sampled by the a sampling inlet mounted ship's top deck using a diaphragm pump installed in the observation room. The sampled air is led into a measuring line where it goes through dehumidification at dehumidifier, after which the CO2 concentration are determined using a measuring equipment (NDIR). Every 8 hours, 4 cylinders of standard gases are measured and the CO2 concentration are calibrated. Calibration of the standard gases is carried out using the NIES09 standard gas series developed by NIES.
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Calculation method |
10 minute average is calculated and recorded based on the output from the NDIR every 10 seconds. The calibrated CO2 concentraions are the time-weighted average values calculated from the calibration curve right before and after the measurements.
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Keywords
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[Free keywords]
Carbon dioxide, CO2 at the sea level atmosphere, Japan, Southeast Asia, Cargo ships |
Update history
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[2023/04/25]
Data are released. ver.1.0. |
Supervisor | |
Data Manager |
References |
Niwa, Y., Sawa, Y., Nara, H., Machida, T., Matsueda, H., Umezawa, T., Ito, A., Nakaoka, S.-I., Tanimoto, H., and Tohjima, Y (2021) Estimation of fire-induced carbon emissions from Equatorial Asia in 2015 using in situ aircraft and ship observations, Atmos. Chem. Phys., 21, 9455–9473, doi:10.5194/acp-21-9455-2021.
Nara, H., Tanimoto, H., Tohjima, Y., Mukai, H., Nojiri, Y. and Machida, T (2017) Emission factors of CO2, CO and CH4 from Sumatran peatland fires in 2013 based on shipboard measurements. Tellus B: Chemical and Physical Meteorology, 69(1), p.1399047, doi:10.1080/16000889.2017.1399047.
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*By accessing or using the Service you agree to follow these Terms. If you disagree with any part of the Terms, you may not access the Service.
License | |
Citation format | *1 The version number is indicated in the name of each data file. *2 As the reference date, please indicate the date you downloaded the files. |
Advisory service
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If you need scientific advice or expert opinion regarding the contents or scientific validity of this data set or Products derived from it, we may be able to provide an advisory service based on an individual contract, different from the above one.
Depending on the extent of the help required, we can offer collaboration and/or supervision of the work based on the present data set. If you want to use our advisory service, contact the Data Provider. |