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Titolo:
Links between intraseasonal. (extended MJO) and ENSO timescales: Insights via geodetic and atmospheric analysis
Autore:
Marcus, SL; Dickey, JO; de Viron, O;
Indirizzi:
CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA CALTECH Pasadena CA USA 91109 LTECH, Jet Prop Lab, Pasadena, CA 91109 USA
Titolo Testata:
GEOPHYSICAL RESEARCH LETTERS
fascicolo: 18, volume: 28, anno: 2001,
pagine: 3465 - 3468
SICI:
0094-8276(20010915)28:18<3465:LBI(MA>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
MADDEN-JULIAN OSCILLATION; ANGULAR-MOMENTUM FLUCTUATIONS; EL-NINO; INTERANNUAL FLUCTUATIONS; SURFACE-TEMPERATURE; CIRCULATION MODELS; TROPICAL PACIFIC; ROTATION; LENGTH; PREDICTABILITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Marcus, SL CALTECH, Jet Prop Lab, MS 238-332, Pasadena, CA 91109 USA CALTECH MS 238-332 Pasadena CA USA 91109 Pasadena, CA 91109 USA
Citazione:
S.L. Marcus et al., "Links between intraseasonal. (extended MJO) and ENSO timescales: Insights via geodetic and atmospheric analysis", GEOPHYS R L, 28(18), 2001, pp. 3465-3468

Abstract

The relationship of intraseasonal variability to ENSO is investigated using daily length-of-day (LOD), atmospheric angular momentum (AAM), west equatorial Pacific (WPAC) wind stress and monthly Nino3 SST data for the years 1976-1999. Strong coherence is found for LOD, AAM, and their residual (representative of oceanic angular momentum and /or unmodeled/underrepresented atmospheric variability) with the regional wind stress at periods near 75 days, a preferred time scale for WPAC Kelvin wave generation. Amplitude envelopes of LOD and AAM filtered at similar periods (60-100 days) are significantly correlated with Nino3 anomalies at an SST lag of 8 months; the LOD-AAM residual correlates at a shorter lag (5 months), with the difference representing an oceanic spin-up time. No significant correlations are found usinga band (36-60 days) typifying the global Madden-Julian Oscillation, accounting for the lack of previous MJO-ENSO correlations in the literature.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 00:26:58