MIRAI MR14-05 Concentration of carbon dioxide and methane in the atmosphere and surface seawater

Last Modified: 2018-01-24
: MR14-05
: Processed (PI)
: JAMSTEC
:
:
Concentration of carbon dioxide (CO2) and methane (CH4) in the atmosphere and surface seawater are presented. The concetration in surface seawater represents. Output was calibrated daily by measuring 3 sets of gas cylinders which has known concentration of CO2 and CH4.

For Using Data

Naohiro Kosugi (Meteorological Research Institute)
It is recommended to contact the above investigator before use for publication.
It is recommended to contact the above investigator before use for publication.
Instrument:
CO2 and pCH4 measuring system; Nippon ANS Ltd Greenhouse Gas Analyzer; Los Gatos Research Showerhead-type equiliburator
Instrument Information:
Air sample drawn from the bow of the ship was dried by magnesium perchlorate and introduced into the cavity-ringdown spectroscopy measurement system (CRDS). Seawater was drawn continuously at ca. 4.5m depth and introduced into a shower-type equilibrator. The seawater-equilibrated air was introduced into CRDS.
The date was formated as commna-separated-value (.csv) file.
01st column: Date and time [UTC yyyy/mm/dd hh:mm]
02nd column: Latitude [deg, negative value means south latitude]
03rd column: Longitude [deg, XXX degrees west was represented as (360 - XXX)]
04th column: Sea surface temperature [degC]
05th column: Quality flag (QF) of sea surface temperature
06th column: Sea surface salinity
07th column: QF of sea surface salinity
08th column: Atmospheric CO2 concentration [ppmv]
09th column: QF of atmospheric CO2 concentration
10th column: Atmospheric CH4 concentration [ppmv]
11th column: QF of atmospheric CH4 concentration
12th column: Sea surface CO2 concentration [ppmv]
13th column: QF of sea surface CO2 concentration
14th column: Sea surface CH4 concentration [ppmv]
15th column: QF of sea surface CH4 concentration

QF 2(good): Data was acquired properly and the value was good.
QF 3(questionable): Data was acquired properly but the value was probrematic due to exhaust from ship and unachievement of the equilibrium
QF 4(Bad): Data was not acquired properly.
QF 9(no data): No data was acquired.
: MR14-05
: Processed (PI)
: JAMSTEC
:
:

Observation Map

Imagery reproduced from ...

Data List

  File names
MR14-05_CO2_CH4.csv

Related Information

Update History

2018-01-24
An observation data was registerd.
2016-11-30
An observation data was registerd.