Quasi 4 Day Mode Observed by a Boundary Layer Radar at Serpong (6°S, 107°E), Indonesia

Quasi 4 Day Mode Observed by a Boundary Layer Radar at Serpong (6°S, 107°E), Indonesia

A spectral analysis of lower tropospheric winds, observed by the Boundary Layer Radar (BLR) at Serpong (6°S, 107°E) in West Java, Indonesia during 1992/93, 1993/94, and 1994/95 rainy seasons reveals a pronounced spectral peak, at a period near 4 days. Filtered analysis of this quasi 4 day mode (Q4DM...

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Veröffentlicht in:Journal of the Meteorological Society of Japan 1999/12/25, Vol.77(6), pp.1177-1184
Hauptverfasser: Widiyatmi, Ipuk, Yamanaka, Manabu D., Hashiguchi, Hiroyuki, Fukao, Shoichiro, Tsuda, Toshitaka, Ogino, Shin-Ya, Harijono, Sri Woro B., Wiryosumarto, Harsono
Format: Artikel
Sprache:eng
Schlagworte:
Earth, ocean, space
Exact sciences and technology
External geophysics
Meteorology
Winds and their effects
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Zusammenfassung:A spectral analysis of lower tropospheric winds, observed by the Boundary Layer Radar (BLR) at Serpong (6°S, 107°E) in West Java, Indonesia during 1992/93, 1993/94, and 1994/95 rainy seasons reveals a pronounced spectral peak, at a period near 4 days. Filtered analysis of this quasi 4 day mode (Q4DM) shows almost an in-phase structure in the vertical. The GANAL (Global Objective Analysis by Japan Meteorological Agency) data for 1992/93 rainy seasons shows that in general the meridional wind component, at the altitude 700hPa, has a westward phase propagation.
ISSN:0026-1165
2186-9057
DOI:10.2151/jmsj1965.77.6_1177