@inbook{74342, author = {ECMWF}, title = {IFS Documentation CY33R1 - Part II: Data Assimilation}, abstract = {

Chapter 1 ‘Overview
Chapter 2 ‘4D Variational Assimilation
Chapter 3 ‘3D variational assimilation (with the first-guess at appropriate time)
Chapter 4 ‘Background term
Chapter 5 ‘Observation operators and the observation cost function (Jo)
Chapter 6 ‘Background, analysis and forecast errors
Chapter 7 ‘Gravity-wave control
Chapter 8 ‘Diagnostics
Chapter 9 ‘Observation processing
Chapter 10 ‘Observation screening
Chapter 11 ‘Analysis of snow
Chapter 12 ‘Land-surface analysis
Chapter 13 ‘Analysis of sea-ice concentration and sea surface temperature
Chapter 14 ‘Data Flow' References

}, year = {2009}, journal = {IFS Documentation CY33R1}, number = {2}, month = {2009}, publisher = {ECMWF}, url = {https://www.ecmwf.int/node/9225}, doi = {10.21957/xbjpj4jvb}, note = {

Operational implementation 3 June 2008

}, language = {eng}, }