Causes for asymmetric warming of sub-diurnal temperature responding to global warming
Defined as the difference between the daily maximum (T-max) and minimum surface air temperature (T-min), the diurnal temperature range (DTR) is critical to local climate, ecosystem, and socio-economic functioning. This study investigates how DTR responds to the future global warming, using a novel, fine-resolution convection-permitting regional climate model. Results demonstrate the asymmetrical impact of global warming, that is, the more substantial warming in T-min, and the lower in T-max. This asymmetry results in the DTR reduction of 0.5 degrees K in the mid-latitude and 0.25 degrees K in the low-altitude area (under 2 degrees K warming scenario). The increase in daytime cloudiness under warmer climates is likely responsible for the reduction of incoming short-wave radiation reduction, consequently causing T-max "underwarming." Study results also suggest that atmospheric instability could play a vital role in the difference in DTR response between the tropical and mid-latitude areas.
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http://n2t.net/ark:/85065/d76h4n7p
eng
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2016-01-01T00:00:00Z
publication
2022-10-28T00:00:00Z
Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
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