caa a22 4500 605474354 CHVBK 20210128100347.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s00382-014-2144-2 doi (NATIONALLICENCE)springer-10.1007/s00382-014-2144-2 The diurnal temperature range in the CMIP5 models [Elektronische Daten] [Jenny Lindvall, Gunilla Svensson] This paper analyzes the diurnal temperature range (DTR) over land in simulations of the recent past and in future projections by 20 models participating in the Coupled Model Intercomparison Project phase 5 (CMIP5). The annually averaged DTR is evaluated for the present-day climate using two gridded datasets (HadGHCND and CRU). The DTR varies substantially between different CMIP5 models, particularly in the subtropics, and is generally underestimated. In future projections of the high emission scenario RCP8.5, the models disagree on both the sign and the magnitude of the change in DTR. Still, a majority of the models project a globally averaged reduction in the DTR, with an increase over Europe, a decrease over the Sahara desert and a substantial decrease in DTR at high latitudes in winter. The general DTR reduction is partly linked to the enhancement of the downwelling clear sky longwave radiation due to greenhouse gases. At high latitudes in winter, the decrease in DTR seems to be enforced by an increase in cloudiness, but in most other regions counteracted by decreases in cloud fraction. Changes in the hydrological cycle and in the clear sky shortwave radiation also impact the DTR. The DTR integrates many processes and neither the model differences in the DTR nor in the change in DTR can be attributed to a single parameter. Which variables that impact the model discrepancies vary both regionally and seasonally. However, clouds seem to matter in most regions and seasons and the evaporative fraction is important in summer. Springer-Verlag Berlin Heidelberg, 2014 CMIP5 nationallicence Diurnal temperature range nationallicence Maximum temperature nationallicence Minimum temperature nationallicence HadGHCND nationallicence Global climate models nationallicence Lindvall Jenny Department of Meteorology, The Bolin Centre for Climate Research, Stockholm University, 106 91, Stockholm, Sweden aut Svensson Gunilla Department of Meteorology, The Bolin Centre for Climate Research, Stockholm University, 106 91, Stockholm, Sweden aut Climate Dynamics Springer Berlin Heidelberg 44/1-2(2015-01-01), 405-421 0930-7575 44:1-2<405 2015 44 382 https://doi.org/10.1007/s00382-014-2144-2 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00382-014-2144-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lindvall Jenny Department of Meteorology, The Bolin Centre for Climate Research, Stockholm University, 106 91, Stockholm, Sweden aut NATIONALLICENCE 700 1- Svensson Gunilla Department of Meteorology, The Bolin Centre for Climate Research, Stockholm University, 106 91, Stockholm, Sweden aut NATIONALLICENCE 773 0- Climate Dynamics Springer Berlin Heidelberg 44/1-2(2015-01-01), 405-421 0930-7575 44:1-2<405 2015 44 382