Login to WDCGG as
Have you completed registration?
Registration and login are needed to download data files.
In line with the GAW Data Policy, users should contact the contributors of all data of interest and propose co-authorship or acknowledgement.


 Organization

NO 39
Acronym KMA
Name Korea Meteorological Administration
Address 1
Address 2 KMA/NIMS
Address 3 33, Seohobuk-ro, Seogwipo, Jeju, 63568
Country/Territory Republic of Korea
Website http://www.kma.go.kr/

 Contact(s)

Name Daegeun Shin
Prefix
Email shingeun@korea.kr
Organization No 39
Organization acronym KMA
Organization name Korea Meteorological Administration
Organization country/territory Republic of Korea
Address 1
Address 2 National Institute of Meteorological Sciences/Korea Meteorological Administration
Address 3 33 Seohobuk-ro, Seogwipo, Jeju, 63568 Rep.of Korea
Country/territory Republic of Korea
Tel +82-64-780-6570
Fax +82-64-738-6512
Last updated date 2023-08-01


 Background observation
 UTC+09:00
 ppb
 2014-01-01 00:00:00 - 2014-12-31 23:59:59: WMO CH4 X2004
 2015-01-01 00:00:00 - 9999-12-31 23:59:59: WMO CH4 X2004A
 9999-12-31 00:00:00 - 2016-01-13 23:59:59: Agilent 6890N(Gas chromatography (FID))
 2016-01-14 00:00:00 - 9999-12-31 23:59:59: Picarro, 2301(CRDS)
 9999-12-31 00:00:00 - 2003-12-31 23:59:59: 66 (m)
 2004-01-01 00:00:00 - 9999-12-31 23:59:59: 86 (m)
 5 seconds
 1999 to 2016.Jan.14:
Methane is calibrated with one point standard. Every, 5 am, 11 am, 17 pm, 23 pm, the standard gas is injected into the instrumnets. We calibrate the instruments every week regulary but when the instrument showed the mulfuction we do it again. However, our calibration is always based on ONE POINT standard gas assuming GC-FID has linearity and STD concentration is similar to background concentration. And also we use the standard gases as target tank. We track the drift of STD area/amount from GC and according the drift data is fixed.
From 2016.1.14 to now :
Every two weeks, 4 point standard gases

From 1999 to 2004 : NOAA CMDL83 scale was used (But corrected with NOAA04 scale)
From 2004 to 2013 : KRISS scale was used(No correction).
2014 : NOAA04 scale.
From 2015 to Now : NOAA04A scale
 RAW data: L0
Auto QC (criteria) and Mannual QC (by staff at each station) : L1
Valid/Invalid (by Scientist in the institute): L2
Hourly and daily baseline selection: HS(t) <=A, [HA(t)-HA(t+1)] <= B or [HA(t)-HA(t-1)] <= B, [HA(t)-30days moving median of HA] <=C : L3 hourly and daily data
Curve fitting: L3 monthly data

Seo et al. (2021), Atmosphere. Korean Meteorological Society Vo.31 No.5(2021) pp1-14

 [Hourly]
 [Daily]
 [Monthly]
 Mannual Flagging
666: inlet filter exchange
658: Diaphragm pump error/low flow
600: Dehumidification system error
683, 682, 685: calibration period, zero/span check, other experimental period
652, 647: Observatory environmental issue
110: Extreme weather issue
910: Other issue which can affect on the measurement

Auto Flagging(six steps)
Instrumental malfunction
Instrumental detection limit
Physical limit
Step check
Continuous check
Comparison check
 Operational/Reporting
 Sampling Environment : The sampling site is located between Korea and China. Ihe location is on the hill at distance of about 500m from the west open sea(Yellow sea), and at an elevation around 46m asl. Along the shore line in north-south direction not much activities in winter time, however, in summer recreational activities such as swimming with some small restaurants. The vegetation around the station are mixed forest with mostly pine. Agricultural activities nearby include rice and sweet potato cultivation. For preparing the agricultural land, agricultural waste burning is conducted mainly in spring and autumn.
Sampling and Analysis Frequency
-1999 to 2016.Jan.14: every 30 minute
- From 2016.1.14 to now: every 5 sec
.Intake
-Filter; Stainless steel filter, monthly replacement, D 4.7 cm , pore size 5μm
-Tube: Dekabon(Nitta Moore 1300-10 D 7.94mm)
-Length from tower to dehumidification system: 50m, No low local point
pump
- KNF N145.1.2.AN.18 Germany, 55 L/min
Dehumidification system
-1999~2011: Three step(4℃ → Nafion → Mg(ClO4)2)
-2012~Now: One step(- 80℃ cold trap)
After Dehumidification system
- stainless steel 1/8" link to the instrument
When the data from GC-FID and CRDS were compared, it showed linearity matching well enough between two instrumnets (R2 = 0.97, delta = 4 ppb).
Description of Instruments - 1999 to 2016.Jan.14: one peak in every 30 mins.
- From 2016.1.14 to now : one value in every 5 secs.
Data Remarks : The blank period is from instrumental malfunction with unknown reasons. KMA/NIMS cannot assure the data from the period that it was discarded from WDCGG. However, KMA has and keep its raw data in the database. When we find out the reason cleary, it will be recovered.
 Wind direction: 1
 Wind speed: 1
 Relative humidity: 0
 Precipitation amount: 0
 Air pressure: 0
 Air temperature: 0
 Dew point temperature: 0
 Sea water temperature: 0
 Sea surface water temperature: 0
 Sea water salinity: 0
 Sea surface water salinity: 0
Meteorological data may remain as first provided, even when greenhouse gas data are updated.
 

 DOI Metadata

DOI
ch4_amy_surface-insitu_39_9999-9999_hourly.nc 10.50849/WDCGG_0039-2014-1002-01-01-9999
ch4_amy_surface-insitu_39_9999-9999_hourly.txt 10.50849/WDCGG_0039-2014-1002-01-01-9999
ch4_amy_surface-insitu_39_9999-9999_daily.nc 10.50849/WDCGG_0039-2014-1002-01-01-9999
ch4_amy_surface-insitu_39_9999-9999_daily.txt 10.50849/WDCGG_0039-2014-1002-01-01-9999
ch4_amy_surface-insitu_39_9999-9999_monthly.nc 10.50849/WDCGG_0039-2014-1002-01-01-9999
ch4_amy_surface-insitu_39_9999-9999_monthly.txt 10.50849/WDCGG_0039-2014-1002-01-01-9999
ch4_amy_surface-insitu_39_9999-9999_hourly_met.nc 10.50849/WDCGG_0039-2014-1002-01-01-9999
ch4_amy_surface-insitu_39_9999-9999_hourly_met.txt 10.50849/WDCGG_0039-2014-1002-01-01-9999
Version 2023-08-01-1133 (Data Version History)
* DOIs and file names may have multiple versions. Be sure to check the data version.
Title Atmospheric CH4 at Anmyeon-do by Korea Meteorological Administration, dataset published as CH4_AMY_surface-insitu_KMA_data1 at WDCGG
Creator Korea Meteorological Administration
Daegeun Shin (KMA)
Publisher World Data Centre for Greenhouse Gases
Publication Date 2018-08-02 (Last Updated: 2023-08-10)
Format Text (WDCGG Data Format Table, WDCGG Meteorological Data Format Table), NetCDF
Relation List (Is Part Of) All CH4 data contributed to WDCGG by GAW stations and mobiles by 2023-09-13
All CH4 data contributed to WDCGG by GAW stations and mobiles by 2022-09-07
All CH4 data contributed to WDCGG by GAW stations and mobiles by 2021-08-27
All CH4 data contributed to WDCGG by GAW stations and mobiles by 2020-09-28
All CH4 data contributed to WDCGG by GAW stations and mobiles by 2019-09-19
All CH4 data contributed to WDCGG by GAW stations and mobiles by 2018-10-25
Geolocation Point
Latitude (north: +; south: -) 36.5386
Longitude (east: +; west: -) 126.33

 GAW Data Policy

"For Scientific purposes, access to these data is unlimited and provided without charge. By their use you accept that an offer of co-authorship will be made through personal contact with the data providers or owners whenever substantial use is made of their data. In all cases, an acknowledgement must be made to the data providers or owners and to the data centre when these data are used within a publication."

 Citation format

This format is an example of the WDCGG standard citation.
Please follow the citation format which the data providers or owners indicate.
Daegeun Shin (KMA), Atmospheric CH4 at Anmyeon-do by Korea Meteorological Administration , dataset published as CH4_AMY_ surface-insitu_KMA_data1 at WDCGG, ver. 2023-08-01-1133, https://doi.org/10.50849/WDCGG_0039-2014-1002-01-01-9999 (Reference date*: YYYY/MM/DD)

* As the reference date, please indicate the date you downloaded the files.

 Reference(s)

1  Li et al.,(2022) DOI: 10.5572/KOSAE.2022.38.1.74
Lee et al.,(2021) DOI: 10.5572/KOSAE.2021.37.5.790
Kenea et al.,(2021) DOI: 10.3390/rs13122266
Dlugokencky et al (1993): The relationship between the methane seasonal cycle and regional sources and sinks at Tae-ahn Peninsula, Korea, Atmo. Environ. 27(14)