Journal
ENVIRONMENTAL RESEARCH LETTERS
Volume 7, Issue 4, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1748-9326/7/4/044026
Keywords
boundary layer; surface air temperature; climate; climate change
Funding
- Norwegian Research Council FRINAT project PBL-feedback [191516/V30]
- European Research Council Advanced Grant [PBL-PMES 227915]
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There are a number of asymmetries in the surface air temperature response to forcing, including polar amplification and changes to the diurnal and seasonal temperature ranges. We propose that such spatial-temporal signatures of climate change can, in part, be explained by differences in the effective heat capacity of the atmosphere. We have demonstrated that predictions arising from this hypothesis are simultaneously satisfied through the analysis of temperature records from daily to inter-decadal timescales using observational and reanalysis datasets. This mechanism can help to explain why we see the largest temperature trends in the winter months (0.42 K/decade in winter compared to 0.18 K/decadein summer) and why the diurnal temperature range decreases in a warming world, having decreased by similar to 0.4 K since 1950.
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