Abstract: A series of numerical experiments was conducted in which asynoptic observations of the mass field were assimilated in a primitive equation, barotropic model with and without a local wind adjustment at insertion times. ...

Abstract: The consequences of using a divergent initialization procedure in a cyclic environment are investigated. The global analysis-forecast system currently operational at the National Meteorological Center (NMC) is used in the ...

Abstract: As shown by the Data Systems Test results, the impact of satellite temperature soundings on numerical weather prediction is highly dependent on the particular analysis and forecast system used to incorporate the data. The ...

Abstract: In order to assess the value of remote sounding data for numerical weather prediction, parallel sets of analyses were produced with (SAT) and without (NOSAT) the sounding data from the experimental Nimbus-6 and operational ...

Abstract: A description is given of the global data assimilation system developed at the National Meteorological Center for treating the heterogeneous global data base. The system is based on updating a nine-level primitive equation ...