Journal
JOURNAL OF CLIMATE
Volume 26, Issue 19, Pages 7783-7788Publisher
AMER METEOROLOGICAL SOC
DOI: 10.1175/JCLI-D-12-00331.1
Keywords
Arctic; Inversions; Feedback; Statistics; General circulation models; Model comparison
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In contrast to prior studies showing a positive lapse-rate feedback associated with the Arctic inversion, Boe et al. reported that strong present-day Arctic temperature inversions are associated with stronger negative longwave feedbacks and thus reduced Arctic amplification in the model ensemble from phase 3 of the Coupled Model Intercomparison Project (CMIP3). A permutation test reveals that the relation between longwave feedbacks and inversion strength is an artifact of statistical self-correlation and that shortwave feedbacks have a stronger correlation with intermodel spread. The present comment concludes that the conventional understanding of a positive lapse-rate feedback associated with the Arctic inversion is consistent with the CMIP3 model ensemble.
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