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

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/74919

Title: Radiosondes Show That After Decades of Cooling, the Lower Stratosphere Is Now Warming
Authors: Philipona, Rolf Browse this author
Mears, Carl Browse this author
Fujiwara, Masatomo Browse this author →KAKEN DB
Jeannet, Pierre Browse this author
Thorne, Peter Browse this author
Bodeker, Greg Browse this author
Haimberger, Leopold Browse this author
Hervo, Maxime Browse this author
Popp, Christoph Browse this author
Romanens, Gonzague Browse this author
Steinbrecht, Wolfgang Browse this author
Stübi, Rene Browse this author
Van Malderen, Roeland Browse this author
Issue Date: 2018
Journal Title: Journal of Geophysical Research: Atmospheres
Volume: 123
Issue: 22
Start Page: 12,509
End Page: 12,522
Publisher DOI: 10.1029/2018JD028901
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.
Rights: Copyright 2018 American Geophysical Union.
Type: article
URI: http://hdl.handle.net/2115/74919
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 藤原 正智

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