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Webinar: Evaporation links the Hydrologic Cycle and Global Heat Transport

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Tuesday, 04 October 2022, 2:00

Tuesday, October 4, 2022. 2:00 PM. Webinar: Evaporation links the Hydrologic Cycle and Global Heat Transport. Robert Fajber, NOAA. Sponsored by NOAA Climate Program Office. More information here. Register here.
Abstract: While the total heat transport of the coupled climate system is constrained by the top of atmosphere radiation, the partitioning of the flux into atmospheric and oceanic components is constrained by the surface energy fluxes. In the atmosphere the dominant balance is between evaporation adding energy and a near uniform net radiative flux removing energy, so that the total energy transport is largely determined by the evaporation. Over the oceans the neat heat flux is largely a balance between shortwave heating and evaporative cooling. Since evaporation has equal but opposite effects of the ocean and atmospheric heat transport it plays a critical role in coupling together the atmospheric and oceanic heat transports.In this talk I will explore the link between Evaporation and Heat Transport using a variety of model experiments and observational analysis. First it will be demonstrated how evaporation drives both the moist and dry components of atmospheric heat transport by decomposing the heat transport into physically based components which relate the heat transport to different diabatic processes. Second I will show results from a coupled ocean atmospheric model using perturbed evaporation, which changes the partitioning between the atmospheric and oceanic heat transport. Lastly I will discuss the biases and spread in cmip model heat transport relative to observations, and our hypotheses as to the cause.

This webinar is part of a series featuring NOAA Climate and Global Change (C&GC) Fellows in the NOAA Science Seminar Series. C&GC is supported by NOAA Climate Program Office and managed by the University Corporation for Atmospheric Research (UCAR).

Bio(s): Robert Fajber received his PhD from the University of Toronto in 2020 in Physics and Atmospheric Science. After he became a NOAA Climate and Global Change Postdoc, hosted By Kyle Armour and Aaron Donohoe at the University of Washington, Atmospheric Sciences. He works on understanding the interdependence of Atmospheric Dynamics and Physics in the global circulation.

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