Testing for Dynamical Dependence: Application to the Surface Mass Balance Over Antarctica
Earth and related Environmental sciences
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Dynamical dependence between key observables and the surface mass balance (SMB) over Antarctica is analyzed in two historical runs performed with the MPI-ESM-P and the CESM1-CAM5 climate models. The approach used is a novel method allowing for evaluating the rate of information transfer between observables that goes beyond the classical correlation analysis and allows for directional characterization of dependence. It reveals that a large proportion of significant correlations do not lead to dependence. In addition, three coherent results concerning the dependence of SMB emerge from the analysis of both models: (i) The SMB over the Antarctic Plateau is mostly influenced by the surface temperature and sea ice concentration and not by large-scale circulation changes; (ii) the SMB of the Weddell Sea and the Dronning Maud Land coasts are not influenced significantly by the surface temperature; and (iii) theWeddell Sea coast is not significantly influenced by the sea ice concentration.
Vannitsem, S., Dalaiden, Q., & Goosse, H. (2019). Testing for dynamical dependence: Application to the surface mass balance over Antarctica. Geophysical Research Letters, 46, https://doi.org/ 10.1029/2019GL084329.