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Titolo:
Earth-atmosphere angular momentum exchange and ENSO: The rotational signature of the 1997-98 event
Autore:
Dickey, JO; Gegout, P; Marcus, SL;
Indirizzi:
CALTECH, Jet Prop Lab, Space Geodet Sci & Applicat Grp, Pasadena, CA 91109USA CALTECH Pasadena CA USA 91109 t Sci & Applicat Grp, Pasadena, CA 91109USA Ecole & Observ Sci Terre, Lab Dynam Globale, F-67084 Strasbourg, France Ecole & Observ Sci Terre Strasbourg France F-67084 84 Strasbourg, France
Titolo Testata:
GEOPHYSICAL RESEARCH LETTERS
fascicolo: 16, volume: 26, anno: 1999,
pagine: 2477 - 2480
SICI:
0094-8276(19990815)26:16<2477:EAMEAE>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
EL-NINO; SOUTHERN OSCILLATION; INTERANNUAL FLUCTUATIONS; VARIABILITY; CIRCULATION; LENGTH; MODEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Dickey, JO CALTECH, Jet Prop Lab, Space Geodet Sci & Applicat Grp, 4800 Oak Grove Dr,Mail Stop 238-332, Pasadena, CA 91109 USA CALTECH 4800 Oak GroveDr,Mail Stop 238-332 Pasadena CA USA 91109
Citazione:
J.O. Dickey et al., "Earth-atmosphere angular momentum exchange and ENSO: The rotational signature of the 1997-98 event", GEOPHYS R L, 26(16), 1999, pp. 2477-2480

Abstract

The impact of the 1997-1998 ENSO event is presented in context of axial Earth-atmosphere angular momentum exchange utilizing length of day (LOD), Southern Oscillation Index (SOI) and atmospheric angular momentum (AAM) data from 1970 to 1998; comparisons are made with previous events. The analysis of equal-area latitudinally belted AAM from the NCEP reanalysis (1958-98) reveals slow global coherent poleward propagation of angular momentum. These structures originate in the equatorial regions, penetrate into high latitudes and are bimodal in nature with variations centered at low-frequency (LF similar to 4.7 yr) and quasi-biennial (QB similar to 2.4 yr) periods. Analyses utilize both a recursive filter and multichannel singular spectrum analysis (M-SSA).

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 14:40:45