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> Diurnal temperature range, which is defined as the difference between the daily maximum (Tmax) and daily minimum air temperature (Tmin), is a critical factor that modulates local climate, ecosystem, and socio-economic functioning. This study investigates how global warming impacts diurnal temperature range (DTR) using a high resolution numerical model. Results demonstrate the asymmetrical response to global warming, that is, the more substantial warming is confirmed in Tmin, and the lower in Tmax. This asymmetry results in the DTR reduction of approximately 0.5°K in the mid-latitude and 0.25°K in the low-altitude area. A cause of the DTR reduction is the daytime-cloudiness increase under warmer climates, which reduces short-wave solar radiation reaching the surface, consequently causing the Tmax “underwarming.” Also, the difference in atmospheric instability in the mid- and low-latitude areas explains the difference in the DTR response, that is, more moderate DTR reduction is confirmed in low latitude areas.

~ Doan, Q.V. et al. (2022) “Causes for asymmetric warming of sub‐diurnal temperature responding to global warming,” Geophysical Research Letters, 49(20). Available at: https://doi.org/10.1029/2022gl100029.