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NOAA AOC WP-3D Research Flight Data (DSI-6420)
Entry ID: gov.noaa.ncdc.C00581

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Summary

Abstract: Methods:

Air samples are collected biweekly at the South Pole in 5-L evacuated glass flasks exposed as triplets. From 1957 until October 1963, 5-L glass flasks were exposed as singlets or pairs biweekly. Between 1960 and 1963, continuous in situ measurements of atmospheric CO2 concentrations were made. The data presented here are derived from both the flask sampling program and the continuous sampling program. Greater details about the sampling methods used at the South Pole are described in Keeling et al. (1976) and in Bacastow and Keeling (1981). Air samples collected at the South Pole are analyzed for CO2 concentration at SIO through the use of an Applied Physics Corporation nondispersive infrared gas analyzer with a water vapor freeze trap. In March 1983, CO2-in-air mixtures prepared by SIO replaced CO2-in-N2 as the calibration gases used to ascertain instrument sensitivity, detect possible contamination, and determine CO2 concentrations (Keeling et al. 2002).

For air samples collected at Barrow, Samoa, and the South Pole to be considered indicative of uncontaminated background air, the replicate flask samples must agree within 0.40 parts per million by volume (ppmv). Data are in terms of the Scripps "03A" calibration scale.

Trends:

Precise measurements of atmospheric CO2 at the South Pole have been obtained by Scripps Institution of Oceanography (SIO) researchers since 1957. This record is based primarily on biweekly flask sampling.

The SIO CO2 curve from the South Pole shows that annual averages of the fitted atmospheric CO2 concentrations rose from 314.82 ppmv in 1958 to 380.42 ppmv in 2007. This represents an average annual increase of 1.34 ppmv per year.

Credit: Keeling, R.F., S.C.Piper, A.F. Bollenbacher and J.S. Walker. 2008. Atmospheric CO2 records from sites in the SIO air sampling network. In Trends: A Compendium of Data on Global Change. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tenn., U.S.A.

Related URL

Link: VIEW EXTENDED METADATA
Description: View Source Metadata document from the Metadata Manager and Repository (NMMR).

Link: VIEW RELATED INFORMATION

Geographic Coverage

N: 90.0 S: -90.0 E: 180.0 W: -180.0

Data Set Citation

Dataset Originator/Creator: National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
Dataset Title: NOAA AOC WP-3D Research Flight Data (DSI-6420)
Dataset Release Date: Unknown
Dataset Release Place: Asheville, NC
Dataset Publisher: National Climatic Data Center
Data Presentation Form: tabular digital data
Online Resource: http://www4.ncdc.noaa.gov/ol/documentlibrary/datasets.html#TD6420A

Temporal Coverage

Start Date: 1989-07-09

Location Keywords

GEOGRAPHIC REGION > GLOBAL

ISO Topic Category

CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
ELEVATION

ENVIRONMENT
IMAGERY/BASE MAPS/EARTH COVER
OCEANS

Platform

AIRCRAFT [Information]

Project

ESIP >Earth Science Information Partners Program [Information]

Quality

ATTRIBUTE ACCURACY REPORT: Not provided

LOGICAL CONSISTENCY REPORT: Unknown

COMPLETENESS REPORT: Completeness information not available.

LINEAGE/PROCESS STEP:
PROCESS DESCRIPTION: Unknown
PROCESS DATE: Unknown

Access Constraints

ACCESS CONSTRAINTS: None

DISTRIBUTION LIABILITY: Every effort has been made to ensure that these data are accurate and reliable within the limits of current NOAA quality control procedures. NOAA can only certify that the data provided to its customers is an authentic copy of the records which were accepted for inclusion in NOAA archives. NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.

Use Constraints

None

Keywords

GLOBAL

GOSIC

G3OS/

Data Set Progress

IN WORK

Data Center

National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce [Information]
Data Center URL: http://www.ncdc.noaa.gov/
Dataset ID: ______DSI-6420 ____

Data Center Personnel

Name: NCDC CUSTOMER SERVICE
Phone: 828-271-4800
Fax: 828-271-4876
Email: ncdc.orders at noaa.gov
Contact Address:
151 Patton Avenue, Room 120
City: Asheville
Province or State: NC
Postal Code: 28801-5001
Country: USA

Personnel

NCDC METADATA SERVICES
Role: DIF AUTHOR
Phone: 828-271-4800
Fax: 828-271-4876
Email: ncdc.metadata at noaa.gov
Contact Address:
151 Patton Avenue
Room 468
City: Asheville
Province or State: North Carolina
Postal Code: 28801-5001
Country: USA

Creation and Review Dates

Last DIF Revision Date: 2012-08-31

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