File:Global climate forcing of the industrial era.png
原始檔案 (867 × 639 像素,檔案大小:73 KB,MIME 類型:image/png)
說明
摘要
[編輯]描述Global climate forcing of the industrial era.png |
English: This graph shows the growth in direct climate forcing (warming influence) from long-lived and well-mixed greenhouse gases in earth's atmosphere during the industrial era. The forcing is represented as a normalized index, defined by the authors as the Annual Greenhouse Gas Index (AGGI), and is displayed as the red curve. For comparison, the graph also shows the growth in the measured atmospheric concentration of these gases. The total concentration of all gases included in the index is represented as an equivalent mixing ratio of CO2 and is displayed as the black curve.
The authors further clarify the graph as follows: "Changes in radiative forcing before 1978 are derived from atmospheric measurements of CO2, started by C.D. Keeling [Keeling et al., 1958], and from measurements of CO2 and other greenhouse gases in air trapped in snow and ice in Antarctica and Greenland [Etheridge et al., 1996; Butler et al,, 1999]. These results define atmospheric composition changes going back to 1750 and radiative forcing changes since pre-industrial times. This longer-term view shows how increases in greenhouse gas concentrations over the past ~70 years (since 1950) have accounted for three-fourths (72%) of the total increase in the AGGI over the past 260 years." References:
Keeling, C.D., (1958), The concentration and isotopic abundances of atmospheric carbon dioxide in rural areas, Geochimica et Cosmochimica Acta, 13, 322–334. Etheridge, D.M., L.P. Steele, R.L. Langenfelds, and R.J. Francey, (1996), Natural and anthropogenic changes in atmospheric CO2 over the last 1000 years from air in Antarctic ice and firn, J. Geophys. Res. 101, 4115–4128. |
日期 | |
來源 | https://www.esrl.noaa.gov/gmd/aggi/aggi.fig5.png |
作者 | James H. Butler and Stephen K. Montzka |
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[編輯]Public domainPublic domainfalsefalse |
本圖像屬於公有領域,因該作品最初來自於美國國家海洋和大氣管理局職員的職務作品。
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目前 | 2023年11月2日 (四) 11:48 | 867 × 639(73 KB) | Bikesrcool(留言 | 貢獻) | 2022 graph update | |
2020年9月6日 (日) 17:28 | 890 × 640(68 KB) | Bikesrcool(留言 | 貢獻) | Uploaded a work by James H. Butler and Stephen K. Montzka from https://www.esrl.noaa.gov/gmd/aggi/aggi.fig5.png with UploadWizard |
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檔案修改日期時間 | 2023年5月22日 (一) 20:24 |