| Autor: |
Nambath K. Balachandran, R. A. Plumb, R. Suozzo, David Rind |
| Rok vydání: |
1991 |
| Předmět: |
|
| Zdroj: |
Journal of geomagnetism and geoelectricity. 43:741-757 |
| ISSN: |
0022-1392 |
| DOI: |
10.5636/jgg.43.supplement2_741 |
| Popis: |
Detailed studies of a wave-2 stratospheric warming simulated by a general circulation model of the middle atmosphere are presented. The December-January warming is preceded by increases in both wave-1 and wave-2 amplitudes several days prior to the warming. The warming peaks with a maximum in wave-2 amplitude, wave propagation towards the pole as shown by E-P flux vectors and increased E-P flux convergence.Forcing the tropical winds to correspond to the QBO patterns significantly alter the warming event. The warming is strengthened during the easterly phase of the QBO and weakened during the westerly phase. For the upper stratospheric warming of this study, the important factor seems to be the presence of easterlies near the equator around 40km altitude, but the mechanism by which the equatorial winds influence the stratospheric warming is not clear. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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