Stratospheric age of air variations between 1600 and 2100

Muthers, S.; Kuchar, A.; Stenke, A.; Schmitt, J.; Anet, J. G.; Raible, C. C.; Stocker, T. F. (2016). Stratospheric age of air variations between 1600 and 2100. Geophysical Research Letters, 43(10), pp. 5409-5418. American Geophysical Union 10.1002/2016GL068734

[img]
Preview
Text
muthers16grl.pdf - Published Version
Available under License Publisher holds Copyright.

Download (2MB) | Preview

The current understanding of preindustrial stratospheric age of air (AoA), its variability, and the potential natural forcing imprint on AoA is very limited. Here we assess the influence of natural and anthropogenic forcings on AoA using ensemble simulations for the period 1600 to 2100 and sensitivity simulations for different forcings. The results show that from 1900 to 2100, CO₂ and ozone-depleting substances are the dominant drivers of AoA variability. With respect to natural forcings, volcanic eruptions cause the largest AoA variations on time scales of several years, reducing the age in the middle and upper stratosphere and increasing the age below. The effect of the solar forcing on AoA is small and dominated by multidecadal total solar irradiance variations, which correlate negatively with AoA. Additionally, a very weak positive relationship driven by ultraviolett variations is found, which is dominant for the 11 year cycle of solar variability.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Climate and Environmental Physics
10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)

UniBE Contributor:

Muthers, Stefan; Schmitt, Jochen; Raible, Christoph and Stocker, Thomas

Subjects:

500 Science > 530 Physics
500 Science > 550 Earth sciences & geology

ISSN:

0094-8276

Publisher:

American Geophysical Union

Language:

English

Submitter:

Doris Rätz

Date Deposited:

08 Jul 2016 15:58

Last Modified:

19 Nov 2016 02:30

Publisher DOI:

10.1002/2016GL068734

BORIS DOI:

10.7892/boris.83822

URI:

https://boris.unibe.ch/id/eprint/83822

Actions (login required)

Edit item Edit item
Provide Feedback