Will Data Assimilation Techniques Open a New Frontier for Aeronomy?

Details Will Data Assimilation Techniques Open a New Frontier for Aeronomy? Will Data Assimilation Techniques Open a New Frontier for Aeronomy?

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsa41c..09s&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SA41C-09

Physics

2447 Modeling And Forecasting, 2494 Instruments And Techniques, 3210 Modeling

Scientific paper

The decades prior to 1980 saw Aeronomy open theoretical, exploration, and empirical modeling frontiers. The subsequent two decades pushed physical modeling and coordinated observational frontiers. However, as national interest has focussed upon how well the weather of aeronomy can be replicated, specified, or forecasted, we realize significant frontiers in aeronomy need to be opened. The applicability of aeronomy in the National Space Weather Program (NSWP) and Living with a Star (LWS) fuels and focusses this challenge. The processes that constitute aeronomy are many fold and almost always coupled. A fluid that is both a neutral gas (thermosphere) and a plasma (ionosphere) are mechanically and electrically driven as energy and momentum are exchanged over spatial and temporal scales of many orders of magnitude. The understanding of weather in this environment requires completeness in the specification of all the key processes, i.e., their parameters. To date, aeronomy calculations, validations, and forecasts are carried out with less than a break-even knowledge of these parameters and climatology is used to make up the difference. As the ground-based and satellite communities' observational capability increases, are we approaching a point where data assimilation techniques can be brought forward to open a weather frontier for aeronomy? Existing and planned assimilation techniques will be discussed, with a strong focus on how they extend our capabilities and lead to an improved understanding of weather in aeronomy.

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