Explaining differences in climate sensitivity by diurnal variations of atmospheric heat content

A recent study explained the difference in climate sensitivities between land and ocean by the different ways by which land and ocean surfaces buffer the strong diurnal variation of solar radiation, with land surfaces buffering this variation in the lower atmosphere. The goal of this thesis project is to evaluate and extend this explanation using output of the MPI-ESM climate model. Climate model output will be used to diagnose diurnal variations in heat storage in the lower atmosphere, evaluate their geographic spatiotemporal variations, and link them to what would be expected from physical reasoning. In a second step, a global warming scenario of 4xCO2 will be used and the differences in sensitivities of minimum and maximum diurnal temperatures will be related to these diurnal variations in heat storage.



Martin Claußen, Geomatikum 1619, martin.claussen@we dont want spammpimet.mpg.de

Axel Kleidon, MPI Biogeochemie, Jena, akleidon@we dont want spambgc-jena.mpg.de

Andreas Chlond, Schäferkampsallee 29 Rm 1.04, andreas.chlond@we dont want spammpimet.mpg.de


Background literature

Kleidon, A. and Renner, M.: An explanation for the different climate sensitivities of land and ocean surfaces based on the diurnal cycle, Earth Syst. Dynam., 8, 849-864, doi.org/10.5194/esd-8-849-2017, 2017.