Data Policy
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."
Version
2026-06-02-1351 (Last updated: 2026-06-11)File
This data set is submitted by SMNA.
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 | 69 |
|---|---|
| Acronym | SMNA |
| Name | National Weather Service |
| Address 1 | Dorrego 4019, (C1425GBE) Ciudad Autónoma de Buenos Aires, Argentina. |
| Address 2 | |
| Address 3 | |
| Country/Territory | Argentina |
| Website | https://www.smn.gob.ar/ |
Contact(s)
| Name | Maria Emilia Ruiz |
|---|---|
| Prefix | |
| meruiz@smn.gob.ar | |
| Organization No | 69 |
| Organization acronym | SMNA |
| Organization name | National Weather Service |
| Organization country/territory | Argentina |
| Address 1 | Av. Dorrego 4019, (C1425GBE) Ciudad Autónoma de Buenos Aires |
| Address 2 | |
| Address 3 | |
| Country/territory | Argentina |
| Tel | +5411 5167-6767 |
| Fax | |
| Last updated date | 2026-06-02 |
| Name | Lino Condori |
|---|---|
| Prefix | |
| lcondori@smn.gob.ar | |
| Organization No | 69 |
| Organization acronym | SMNA |
| Organization name | National Weather Service |
| Organization country/territory | Argentina |
| Address 1 | Station GAW Ushuaia - International Airport “Malvinas Argentinas” – Ushuaia Tierra del Fuego – Argentina |
| Address 2 | |
| Address 3 | |
| Country/territory | Argentina |
| Tel | +54 9 11 5873-4246 |
| Fax | |
| Last updated date | 2026-06-02 |
| Background observation | |
| UTC | |
| ppb | |
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9999-12-31 00:00:00 - 9999-12-31 23:59:59: WMO CH4 X2004A |
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9999-12-31 00:00:00 - 9999-12-31 23:59:59: Picarro G2401 Serial number 3163-CFKADS-2307(CRDS) |
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9999-12-31 00:00:00 - 9999-12-31 23:59:59: 7 (m) |
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| 1 minute | |
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Three calibration tanks are measured automatically every 15 days. Air from each tank is measured for 20 minutes, resulting in a total sequence of 60 minutes. A stabilization time of 10 minutes is considered for each tank. A 3-point calibration curve is then constructed using a linear fit. The calibration scale for CH4 is WMO X2004A. In June 2026, data for the year 2024 were reprocessed and resubmitted together with the 2020–2025 dataset Data for the year 2023 were exceptionally calibrated using a 2-tank calibration equation due to failure of one calibration tank Calibration quality is verified a posteriori through quality control procedures. These procedures include calibration equation series plots, drift tank plots, and consistency checks. |
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Raw data from the instrument are collected by the data acquisition system and stored at 1-minute intervals. Instrument performance is checked on site by an operator daily. The analyzer (Picarro G2401) is coupled to a custom-built automatic calibration unit. The sample air is dried prior to analysis using a Perma Pure Nafion dryer (PD-50T-12MPS). The 1-minute raw data are inspected and evaluated using quality control routines before being accepted as valid measurements. Raw data are internally flagged for instrumental malfunctions, calibration sequences, target tank measurements, and abnormal (invalid) values such as outliers. The 1-minute CH4 data are corrected using calibration equation. |
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[Hourly] Calibration and invalidated 1-minute data is removed prior to averaging. Hourly averages are calculated as the arithmetic mean of valid 1-minute calibrated data, and standard deviations are also computed. A minimum number of available 1-minute values within each respective hour is required for averaging. Background conditions are defined as periods when wind speed exceeds 2.5 m/s and wind direction is between 90° and 270°. The minimum requirement is the availability of 2/3 valid 1-minute points within a single hour. So, if between 40 and 60 valid 1-minute data points under background conditions are available, only those background points are averaged. The resulting hourly average is flagged as valid and identified as representative of background conditions. If between 40 and 60 valid 1-minute ambient air data points (including both background and non-background conditions) are available, all points within the hour are averaged. The hourly value is flagged as valid but not representative of background conditions. If neither of the two conditions above is met, the hourly average is assigned a value of –999.999 and flagged as invalid. Hourly standard deviation is calculated as the sample standard deviation of valid minute-level data used in the hourly average [Daily] Daily averages are calculated from the hourly averages, applying similar considerations. The minimum requirement is the availability of 1/3 valid hourly averages within a single day. [Monthly] Monthly averages are calculated from the daily averages, applying similar considerations.The minimum requirement is the availability of 1/4 valid daily averages within a single month. |
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Valid (background): 1 Valid: 2 Invalid: 3 |
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| Operational/Reporting | |
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Wind direction: Wind speed: Relative humidity: Precipitation amount: Air pressure: Air temperature: Dew point temperature: Sea water temperature: Sea surface water temperature: Sea water salinity: Sea surface water salinity: |
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Meteorological data may remain as first provided, even when greenhouse gas data are updated. |
No DOI available
Related information
| 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 2025-09-16 |
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| Geolocation Point |
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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.
Please follow the citation format which the data providers or owners indicate.
Maria Emilia Ruiz (SMNA),
Lino Condori (SMNA),
Atmospheric CH4
at Ushuaia by National Weather Service,
dataset published as CH4_USH3007_surface-insitu_SMNA_data1 at WDCGG,
ver. 2026-06-02-1351 (Reference date*: YYYY/MM/DD)
* As the reference date, please indicate the date you downloaded the files.
* As the reference date, please indicate the date you downloaded the files.
