BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Evaluation of mass fixing schemes for the ECMWF Integrated Forecas
 ting System (IFS) - Michail Diamantakis\,   (European Centre for Medium-Ra
 nge Weather Forecasts (ECMWF))
DTSTART:20120927T151000Z
DTEND:20120927T153500Z
UID:TALK40212@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:The purpose of this talk is to summarize the conservation prop
 erties of the ECMWF spectral semi-Lagrangian\, semi-implicit IFS model and
  present results from some recently implemented algorithms for correcting 
 global mass imbalances due to advection. \n\nSeveral established algorithm
 s of different complexity\, such as the ones described in [1\,2\,3\,4]\, w
 ill be summarized and assessed in the context of NWP forecasts. Results fr
 om water species advection and passive tracer advection will be presented.
  Strengths and limitations of these schemes will be analyzed as well as th
 eir ability to preserve monotonicity and the impact they have on forecast 
 skill. \n\nReferences \n\nBermejo R.\, Conde J.\, 2002: A conservative Qua
 si-Monotone Semi-Lagrangian Scheme. MWR\, 130\, 423-430. \n\nA. Priestley\
 , 1993: A Quasi-Conservative Version of the Semi-Lagrangian Advection Sche
 me\, MWR\, 121\, 621-629. \n\nZerroukat M.\, 2010\, A simple mass conservi
 ng semi-Lagrangian scheme for transport problems\, JCP\, 229\, 9011-9019. 
 \n\nWilliamson D.L.\, Rasch P.J.\, 1994\, Water vapor transport in the NCA
 R CCM2\, Tellus\, 46A\, 34-51. \n\n
LOCATION:Seminar Room 1\, Newton Institute
END:VEVENT
END:VCALENDAR