[ATM S 521] Dr. Fuyu Li: "Hydrological Extremes in GCMs: The Way Out of the 'Dreary' State?"

Start Date/Time: Monday, March 05, 2012, 3:30 PM
Ending Date/Time: Monday, March 05, 2012, 4:20 PM
Location: Bagley 131

***Atmos Physics & Chemistry Seminar***
Coordinators: Profs. Robert Houze (houze@atmos.washington.edu) and Dennis Lettenmaier (dennisl@u.washington.edu)

Speaker: Fuyu Li, Geological Postdoctoral Fellow, Departments of Atmospheric Sciences and Civil & Environmental Engineering, Lawrence Berkeley National Laboratory
Title: Hydrological Extremes in Global Climate Models: The Way Out of the ‘Dreary’ State?

Abstract:
Hydrological extremes often have dramatic ecological, economic, and sociological impacts. Robust simulation and projection of hydrological extremes are crucial, as significant upward trends in the frequency of these events have been detected in recent decades. The speaker will present some recent efforts aiming to test the fidelity of current GCM's simulations in precipitation extremes and to find possible ways to improve the simulations. The analyzing hierarchy includes idealized GCM, high-resolution realistic GCM, and 'Super-Parameterized' GCM. The study shows that inconsistencies exist across different spatial scales even in very simplified GCMs. High-resolution realistic GCM provides more detailed and more accurate features of precipitation extremes in regional scales, while 'Super-Parameterized' GCM could potentially be the ultimate simulator for the extreme hydrological events.