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    Radiosondes Show That After Decades of Cooling, the Lower Stratosphere Is Now Warming


    Philipona, R. and Mears, C. and Fujiwara, Masatomo and Jeannet, Pierre and Thorne, Peter and Bodeker, Greg and Haimberger, L. and Hervo, Maxime and Popp, Christoph and Romanens, Gonzague and Steinbrecht, Wolfgang and Stübi, Rene and Van Malderen, Roeland (2018) Radiosondes Show That After Decades of Cooling, the Lower Stratosphere Is Now Warming. Journal of Geophysical Research: Atmospheres, 123. pp. 12509-12522. ISSN 2169-8996

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    Abstract

    Since the mid-twentieth century, radiosonde and satellite measurements show that the troposphere has warmed and the stratosphere has cooled. These changes are primarily due to increasing concentrations of well-mixed greenhouse gases and the depletion of stratospheric ozone. In response to continued greenhouse gas increases and stratospheric ozone depletion, climate models project continued tropospheric warming and stratospheric cooling over the coming decades. Global average satellite observations of lower stratospheric temperatures exhibit no significant trends since the turn of the century. In contrast, an analysis of vertically resolved radiosonde measurements from 60 stations shows an increase of lower stratospheric temperature since the turn of the century at altitudes between 15 and 30 km and over most continents. Trend estimates are somewhat sensitive to homogeneity assessment choices, but all investigated radiosonde data sets suggest a change from late twentieth century cooling to early 21st century warming in the lower stratosphere, which is consistent with a reversal from ozone depletion to recovery from the effects of ozone-depleting substances. In comparison, satellite observations at the radiosonde locations show only minor early 21st century warming, possibly due to the compensating effects of continued cooling above the radiosonde altitude range.

    Item Type: Article
    Keywords: Radiosondes Show; Decades of Cooling; Lower Stratosphere; Warming;
    Academic Unit: Faculty of Social Sciences > Geography
    Faculty of Social Sciences > Research Institutes > Irish Climate Analysis and Research Units, ICARUS
    Item ID: 11087
    Identification Number: https://doi.org/10.1029/2018JD028901
    Depositing User: Peter Thorne
    Date Deposited: 24 Sep 2019 14:08
    Journal or Publication Title: Journal of Geophysical Research: Atmospheres
    Publisher: American Geophysical Union (AGU)
    Refereed: Yes
    URI:

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