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

Autor(en)

Rolf Philipona, Carl Mears, Masatomo Fujiwara, Pierre Jeannet, Peter Thorne, Greg Bodeker, Leopold Haimberger, Maxime Hervo, Christoph Popp, Gonzague Romanens, Wolfgang Steinbrecht, Rene Stübi, Roeland Van Malderen9

Abstrakt

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.

Organisation(en)

Institut für Meteorologie und Geophysik

Externe Organisation(en)

Federal Office of Meteorology and Climatology, MeteoSwiss, Remote Sensing Systems, Hokkaido University, National University of Ireland, Maynooth, Bodeker Scientific, MeteoSwiss, Deutscher Wetterdienst, Royal Netherlands Meteorological Institute

Journal

Journal of Geophysical Research: Atmospheres

Band

123

Seiten

12509-12522

Anzahl der Seiten

14

ISSN

2169-897X

DOI

https://doi.org/10.1029/2018JD028901

Publikationsdatum

10-2018

Peer-reviewed

Ja

ÖFOS 2012

105206 Meteorologie

Schlagwörter

ASJC Scopus Sachgebiete

Geophysics, Earth and Planetary Sciences (miscellaneous), Space and Planetary Science, Atmospheric Science

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/radiosondes-show-that-after-decades-of-cooling-the-lower-stratosphere-is-now-warming(bf9e9a04-e390-4f38-a4be-47868709d1ca).html