 |
| Titel |
Planetary waves tracking |
| VerfasserIn |
F. Grazzini, V. Lucarini |
| Konferenz |
EGU General Assembly 2009
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250026548
|
|
|
|
|
|
| Zusammenfassung |
| ABSTRACT
The study of the properties of atmospheric planetary waves - e.g
propagation and breaking - is crucial for understanding weather and
climate. Persistent spell of anomalous weather are often observed in
conjunction with pronounced and long lasting planetary wave packet.
Although the skill of long range forecast (say beyond 10 days) is still
pretty low, there are hints that pronounced planetary waves wave train
episodes may bring in extra-predictability due to their inherent long
space-time correlation. In terms of climate, planetary waves have a
fundamental role for the meridional transport of energy and momentum.
As a first step of our research project, here we want to present the
first results of a tracking algorithm, based on the planetary wave
envelope computation. Our algorithm allows for monitoring the main
wave packet episodes by computing their statistical properties like origin,
duration, ray path. These information may be used in future studies to define
new diagnostic tools for climate models and to try substantiate the hypothesis
that, in case of presence of pronounced wave packet, the predictability of
large-scale atmospheric motion increases. |
|
|
|
|
|
|