Search Results

You are looking at 11 - 14 of 14 items for :

  • Boundary currents x
  • Sixth WMO Data Assimilation Symposium x
  • Refine by Access: All Content x
Clear All
Patrick Nima Raanes, Alberto Carrassi, and Laurent Bertino

is not to provide a full comparison of all of the alternatives under all relevant circumstances, but to focus on the square root approach. Techniques not considered any further here include using more complicated stochastic parameterizations ( Arnold et al. 2013 ; Berry and Harlim 2014 ), physics-based forcings such as stochastic kinetic energy backscatter ( Shutts 2005 ), relaxation ( Zhang et al. 2004 ), and boundary condition forcings. c. Framework Suppose the state and observation, and

Full access
Hailing Zhang and Zhaoxia Pu

(GTS), profiler and U.S. radar-derived winds, Special Sensor Microwave Imager (SSM/I) oceanic winds and total cloud water (TCW) retrievals, and satellite wind data from the National Environmental Satellite Data and Information Service (NESDIS). We noticed that the NCEP conventional observations do not include surface mesonet data over land during our study period. Surface mesonet observations are currently not commonly assimilated into NCEP operational global and regional models. Prior to Katrina

Full access
Ting-Chi Wu, Christopher S. Velden, Sharanya J. Majumdar, Hui Liu, and Jeffrey L. Anderson

deployments. For example, this information could impact potential targeting scenarios, such as activating and focusing satellite rapid-scan operations, or directing aircraft assets. In current operational NWP centers, AMV data from various geostationary and polar-orbiting platforms are routinely assimilated mostly via variational data assimilation systems in addition to conventional and additional satellite observations including radiance (for more information, please visit http

Full access
Chengsi Liu and Ming Xue

experiments other such equivalences. For all the experiments, the static BEC is excluded, and, therefore, we focus on the treatment of the ensemble covariance and the associated covariance localization effects. For this reason, 4DEnVar-FGAT is not considered here. The dynamic system is governed by a one-dimensional (1D) linear advection equation with periodic boundary conditions. The initial condition is defined by The model domain width is and is discretized uniformly at grid spacing. The default

Full access