Background field

From Glossary of Meteorology
Revision as of 17:30, 26 January 2012 by imported>Perlwikibot (Created page with " {{TermHeader}} {{TermSearch}} <div class="termentry"> <div class="term"> == background field == </div> <div class="definition"><div class="short_definition">In [[objec...")

background field

In objective analysis and data assimilation, an a priori estimate of the atmospheric state.

In most data assimilation systems, the background field is a forecast from the previous analysis time. Note that the term “first-guess field” has been used for the background field, but “background field” is currently the preferred usage.