reference : Drivers of the recent tropical expansion in the Southern Hemisphere: Changing SSTs or ozone depletion?

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/reference/c933c170-d353-4a2b-8855-d6b147d58d16
Bibliographic fields
reftype Journal Article
Abstract Observational evidence indicates that the southern edge of the Hadley cell (HC) has shifted southward during austral summer in recent decades. However, there is no consensus on the cause of this shift, with several studies reaching opposite conclusions as to the relative role of changes in sea surface temperatures (SSTs) and stratospheric ozone depletion in causing this shift. Here, the authors perform a meta-analysis of the extant literature on this subject and quantitatively compare the results of all published studies that have used single-forcing model integrations to isolate the role of different factors on the HC expansion during austral summer. It is shown that the weight of the evidence clearly points to stratospheric ozone depletion as the dominant driver of the tropical summertime expansion over the period in which an ozone hole was formed (1979 to late 1990s), although SST trends have contributed to trends since then. Studies that have claimed SSTs as the major driver of tropical expansion since 1979 have used prescribed ozone fields that underrepresent the observed Antarctic ozone depletion.
Author Darryn W. Waugh; Chaim I. Garfinkel; Lorenzo M. Polvani
DOI 10.1175/JCLI-D-15-0138.1
Issue 16
Journal Journal of Climate
Keywords Hadley circulation,Subsidence,Ozone,Trends
Pages 6581-6586
Title Drivers of the recent tropical expansion in the Southern Hemisphere: Changing SSTs or ozone depletion?
Volume 28
Year 2015
Bibliographic identifiers
.reference_type 0
_record_number 19659
_uuid c933c170-d353-4a2b-8855-d6b147d58d16