Journal
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
Volume 118, Issue 7, Pages 3007-3015Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1002/jgrd.50232
Keywords
Hadley cell; detection and attribution; stratospheric ozone; climate model
Categories
Funding
- Korean Polar Research Institute (KOPRI) [PE12010]
- Goyder Institute for Water Research
- Ministry of Land, Transport & Maritime Affairs (MOLIT), South Korea [PE12010] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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It has been suggested that the Hadley cell has been widening during the past three decades in both hemispheres, but attribution of its cause(s) remains challenging. By applying an optimal fingerprinting technique to 7 modern reanalyses and 49 coupled climate models participating in the CMIP3 and CMIP5, here we detect an influence of human-induced stratospheric ozone depletion on the observed expansion of the Hadley cell in the Southern Hemisphere (SH) summer. The detected signal is found to be separable from other external forcings that include greenhouse gases (GHGs), confirming a dominant role of stratospheric ozone in the SH summer climate change. Our results are largely insensitive to observational and model uncertainties, providing additional evidence for a human contribution to the atmospheric circulation changes.
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