IPCC Working Group 1 Third Assessment Report

The concentration of CO2 in the atmosphere has risen from close to 280 parts per million (ppm) in 1800, at first slowly and then progressively faster to a value of 367 ppm in 1999, echoing the increasing pace of global agricultural and industrial development. This is known from numerous, well-replic...

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Bibliographic Details
Main Authors: Goulden, ML, Prentice, IC, Farquhar, G, Fasham, M, Goulden, M, Heimann, M, Jaramillo, V, Kheshgi, H, Le Quere, C, Scholes, R, Wallace, D
Format: Article in Journal/Newspaper
Language:English
Published: eScholarship, University of California 2001
Subjects:
Antarctic
Antarc*
ice core
Online Access:http://www.escholarship.org/uc/item/9f99g588
Description
Summary:The concentration of CO2 in the atmosphere has risen from close to 280 parts per million (ppm) in 1800, at first slowly and then progressively faster to a value of 367 ppm in 1999, echoing the increasing pace of global agricultural and industrial development. This is known from numerous, well-replicated measurements of the composition of air bubbles trapped in Antarctic ice. Atmospheric CO2 concentrations have been measured directly with high precision since 1957; these measurements agree with ice-core measurements, and show a continuation of the increasing trend up to the present.

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