DIURNAL VARIATIONS OF SENSIBLE HEAT FLUXES OVER YATSU TIDAL FLAT IN SUMMER USING LARGE APERTURE SCINTILLOMETER

We have investigated the sensible heat flux between the water/soil surface and the atmosphere over Yatsu tidal flat using large aperture scintillometer. Diurnal variation of heat fluxes depend not only on the solar insolation but also the water level. Sensible heat flux at Yatsu tidal flat was posit...

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Veröffentlicht in:	Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) Ser. B3 (Ocean Engineering), 2013, Vol.69(2), pp.I_1012-I_1017
Hauptverfasser:	ODA, Ryoko, BANNAI, Yuta, BANBA, Yusuke, TAKAOKA, Hiroaki, NIHEI, Manabu, YAUCHI, Eiji
Format:	Artikel
Sprache:	eng ; jpn
Schlagworte:	heat island scintillometer sensible heat flux urban atmosphere Yatsu tidal flat
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Zusammenfassung:	We have investigated the sensible heat flux between the water/soil surface and the atmosphere over Yatsu tidal flat using large aperture scintillometer. Diurnal variation of heat fluxes depend not only on the solar insolation but also the water level. Sensible heat flux at Yatsu tidal flat was positive in daytime (83Wm-2), and daily mean of the sensible heat flux was 1.26MJm-2day-1. However, it was relatively smaller than that in a regidential area of Kanto region (about 300Wm-2, 9.02MJm-2day-1)10). Quadrant analysis of the sensible heat and momentum fluxes revealed that positive heat flux is predominantly accounted by upward motion of heated air which is driven in a soil surface exposed from water.
ISSN:	2185-4688 2185-4688
DOI:	10.2208/jscejoe.69.I_1012