The Journal of Allergy and Clinical Immunology
Volume 122, Issue 3 , Pages 473-474 , September 2008

A changing context for life on Earth

  • James W. Hurrell, PhD

      Affiliations

    • Corresponding Author InformationReprint requests: James W. Hurrell, PhD, Senior Scientist, Climate and Global Dynamics Division, National Center for Atmospheric Research, Boulder, CO.

Received 18 July 2008 ,Revised 21 July 2008 ,Accepted 24 July 2008.

  • Image Result

    Estimated changes in annual global mean surface temperatures (T°C, color bars) and carbon dioxide concentrations (thick black line) over the past 148 years relative to 1961 through 1990 average values

    Estimated changes in annual global mean surface temperatures (T°C, color bars) and carbon dioxide concentrations (thick black line) over the past 148 years relative to 1961 through 1990 average values. Carbon dioxide concentrations since 1957 are from direct measurements at Mauna Loa, Hawaii, whereas earlier estimates are derived from ice core records. The scale for carbon dioxide concentrations is in parts per million by volume (ppmv) relative to a mean of 333.7 ppmv, whereas the temperature anomalies are relative to a mean of 14°C. Updated from Hurrell JW. Recent atmospheric circulation changes and their role in global warming. FSWX Outlook 2002;3:1-10.9

 Disclosure of potential conflict of interest: J. W. Hurrell has served as a coprincipal investigator for research funded by the National Oceanic and Atmospheric Administration.

 The National Center for Atmospheric Research is sponsored by the National Science Foundation.

PII: S0091-6749(08)01361-4

doi: 10.1016/j.jaci.2008.07.017

The Journal of Allergy and Clinical Immunology
Volume 122, Issue 3 , Pages 473-474 , September 2008

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