Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Seasonal spreading of the Persian Gulf Water mass in the Arabian Sea
Autore:
Prasad, TG; Ikeda, M; Kumar, SP;
Indirizzi:
Hokkaido Univ, Grad Sch Environm Earth Sci, Div Ocean & Atmospher Sci, Sapporo, Hokkaido 0600810, Japan Hokkaido Univ Sapporo Hokkaido Japan 0600810oro, Hokkaido 0600810, Japan Natl Inst Oceanog, Phys Oceanog Div, Panaji 403004, Goa, India Natl Inst Oceanog Panaji Goa India 403004 Div, Panaji 403004, Goa, India
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
fascicolo: C8, volume: 106, anno: 2001,
pagine: 17059 - 17071
SICI:
0148-0227(20010815)106:C8<17059:SSOTPG>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
TROPICAL INDIAN-OCEAN; NORTHEAST MONSOON; SOMALI CURRENT; LAYER DEPTH; RED-SEA; DYNAMICS; TEMPERATURE; SALINITY; FLUXES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
43
Recensione:
Indirizzi per estratti:
Indirizzo: Prasad, TG Hokkaido Univ, Grad Sch Environm Earth Sci, Div Ocean & Atmospher Sci, N-10,W-5, Sapporo, Hokkaido 0600810, Japan Hokkaido Univ N-10,W-5 Sapporo Hokkaido Japan 0600810 10, Japan
Citazione:
T.G. Prasad et al., "Seasonal spreading of the Persian Gulf Water mass in the Arabian Sea", J GEO RES-O, 106(C8), 2001, pp. 17059-17071

Abstract

The characteristics of the subsurface salinity maximum associated with thePersian Gulf Water mass (PGW) are used to quantify the spreading and mixing of PGW in the thermocline of the Arabian Sea based on a bimonthly climatology of temperature and salinity. Examination of the seasonal cycles of heat and freshwater fluxes in the Persian Gulf region indicates that PGW formsas a result of elevated evaporative cooling in conjunction with reduced insolation during winter. Maps are presented of the distributions of depth, salinity, and geostrophic flow on sigma (theta) = 26.5, which nearly coincides with the core of the PGW. After intense mixing in the Strait of Hormuz, the property fields suggest that warm (> 17 degreesC) and high-salinity (> 36.2 psu) PGW enters the Arabian Sea to form a subsurface salinity extremumbetween 200 and 300 m. We have found variability in the distribution of PGW in the Arabian Sea associated with monsoonal changes in the Arabian Sea circulation. During the winter monsoon, there is southward spreading of PGW along the western boundary; during summer it is not present. Lateral mixingwith low-salinity water from the Bay of Bengal in the region south of 10 degreesN and along the west coast of India during winter accounts for changes in the characteristics of PGW along these paths. Associated with the Findlater Jet during summer, the entire thermohaline structure is vertically displaced along the coasts of Somalia and Arabia. Ekman convergence in the central Arabian Sea accounts for deepening of the PGW. Either lateral or vertical mixing would cause changes in PGW :properties in these regions. Duringthis time, PGW spreads predominantly southward along the central Arabian Sea, as indicated by a tongue of high salinity.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/05/20 alle ore 15:53:22