In situ ship and aircraft observation-based column-averaged mixing ratios of CO2 (obs. XCO2) over the Western Pacific Ocean

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The dataset contains the timeseries of monthly "observation-based XCO2" (obs. XCO2) over the Western Pacific Ocean from 2014 to 2016 for three representative latitude ranges: the northern midlatitudes (20–30° N), the Equator region (0–10° N), and southern latitudes (20–10° S). The dataset was obtained by integrating cargo-ship and commercial aircraft observations with the aid of state-of-the art atmospheric chemistry-transport model calculations.
The spatial and temporal coverage of the dataset will be continously extended and updated.

Description

Creator
Release date
2022/08/05
Temporal coverage
2014/01/01 - 2016/12/31
Data provider
NIES
Email: cgerdb_admin(at)nies.go.jp
DOI
File format
Data volume
10 KB
Version
ver.1.0 (Last updated: 2022/08/05)
Language
English

Data Set

Parameters
Column-averaged mixing ratios of CO2
Domain
Regional
Details of 3 domains
[Region 1] lat: 20–30°N, lon: 130-150°E
[Region 2] lat: 0-10°N, lon: 140-160°E
[Region 3] lat: 20-10°S, lon: 145-165°E
Time resolution
1 month
Spatial resolution
  Latitude: 10 degrees, Longitude: 20 degrees
Calculation method
In-situ CO2 observations onboard cargo-ships of the Ship Of Opportunity program (SOOP, https://soop.jp/ ) and onboard commercial aircrafts of the Comprehensive Observation Network for Trace gases by Airliner (CONTRAIL, https://www.cger.nies.go.jp/contrail/) are monthly averaged within 10° latitude by 20° longitude boxes over the ocean. The monthly averages are integrated with the aid of state-of-the art atmospheric chemistry-transport model calculations to obtain observation-based CO2 profiles. Using equation (15) of Connor et al. (2008) (https://doi.org/10.1029/2006JD008336), and parameters of GOSAT (Greenhouse Gases Observing Satellite) retrievals, an "observation-based column-averaged CO2" (obs. XCO2) dataset is calculated (https://doi.org/10.5194/acp-21-8255-2021).
Keywords
[Free keywords]
    Carbon cycle, Climate change, Greenhouse gas, Satellite Validation
[GCMD_Platform]
    Water-based Platforms > Vessels > Surface > Ships
    Air-based Platforms > Jet > Airplane
    Space-based Platforms > Earth Observation Satellites > GOSAT
[GCMD_Science
    ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON
    COMPOUNDS > ATMOSPHERIC CARBON DIOXIDE
Update history
[2022/08/05]
     Data are released. ver.1.0.

References Information

References
Müller, A., Tanimoto, H., Sugita, T., Machida, T., Nakaoka, S., Patra, P. K., Laughner, J., and Crisp, D.(2020): New approach to evaluate satellite derived XCO2 over oceans by integrating ship and aircraft observations, Atmos. Chem. Phys., doi:10.5194/acp-21-8255-2021.

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Citation format

When this data set is referred to in publications, it should be cited in the following format.
  Astrid Müller (2022), In situ ship and aircraft observation-based column-averaged
  mixing ratios of CO2 (obs. XCO2) over the Western Pacific Ocean, ver.x.x*1, NIES,
  DOI:10.17595/20220805.001. (Reference date*2: YYYY/MM/DD)
  *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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