Stratospheric contraction caused by increasing greenhouse gases

Dados Bibliográficos

ID15544827
AutoresPetr Pišoft (0000-0002-5034-9169, Charles University, autor correspondente), Petr Šácha (0000-0001-9707-1750, Charles University, autor correspondente), Lorenzo M Polvani (0000-0003-4775-8110, Columbia University), Juan Antonio Añel (0000-0003-2448-4647, Universidade de Vigo), Laura de la Torre (0000-0001-5305-6946, Universidade de Vigo), Roland Eichinger (0000-0001-6872-5700, Charles University), Ulrich Foelsche (0000-0002-9899-6453, University of Graz), Péter Huszár (0000-0001-6287-5337, Charles University), Christoph Jacobi (0000-0002-7878-0110, Leipzig University), Jan Karlický (0000-0002-2936-0785, Charles University), Aleš Kuchař (0000-0002-3672-6626, Charles University), Jiří Mikšovský (0000-0002-5259-2269, Charles University), Michal Žák (0000-0001-8774-2194, Charles University), Harald E Rieder (0000-0003-2705-0801, BOKU University)
Ano2021
Volume16
Fascículo6
Páginas064038-064038
Data de publicação2021-05-06
Peer ReviewedSim
Open AccessSim
TipoARTICLE
PeriódicoEnvironmental Research Letters (JOURNAL)
Identificadores do periódicoISSN: 1748-9326 • E-ISSN: 1748-9326
EditoraIOP Publishing (PUBLISHER • GB)
DOI10.1088/1748-9326/abfe2b
OpenAlexW3159691828
IdiomaEN
Citações recebidas5
Referências citadas53

Rising emissions of anthropogenic greenhouse gases (GHG) have led to tropospheric warming and stratospheric cooling over recent decades. As a thermodynamic consequence, the troposphere has expanded and the rise of the tropopause, the boundary between the troposphere and stratosphere, has been suggested as one of the most robust fingerprints of anthropogenic climate change. Conversely, at altitudes above ∼55 km (in the mesosphere and thermosphere) observational and modeling evidence indicates a downward shift of the height of pressure levels or decreasing density at fixed altitudes. The layer in between, the stratosphere, has not been studied extensively with respect to changes of its global structure. Here we show that this atmospheric layer has contracted substantially over the last decades, and that the main driver for this are increasing concentrations of GHG. Using data from coupled chemistry-climate models we show that this trend will continue and the mean climatological thickness of the stratosphere will decrease by 1.3 km following representative concentration pathway 6.0 by 2080. We also demonstrate that the stratospheric contraction is not only a response to cooling, as changes in both tropopause and stratopause pressure contribute. Moreover, its short emergence time (less than 15 years) makes it a novel and independent indicator of GHG induced climate change

Atmospheric sciences · Climate change · Climatology · Global warming · Greenhouse gas · Mesosphere · Stratopause · Stratosphere · Tropopause · Troposphere · Atmospheric and Environmental Gas Dynamics · Atmospheric chemistry and aerosols · Atmospheric Ozone and Climate · Environmental Science · Geology