In-situ observed detailed temperature profile in surface 10-meter layer over the tropical western Pacific

Masaki KATSUMATA; Hugo BELLENGER; Kunio YONEYAMA

Presentation information

Oral

Symbol A (Atmospheric, Ocean, and Environmental Sciences) » A-CG Complex & General

[A-CG37_28AM2] Multi-scale ocean-atmosphere interaction in the tropics

Mon. Apr 28, 2014 11:00 AM - 12:31 PM 423 (4F)

Convener:*Motoki Nagura(Japan Agency for Marine-Earth Science and Technology), Takuya Hasegawa(Japan Agency for Marine-Earth Science and Technology), Ayako Seiki(Japan Agency for Marine-Earth Science and Technology), Tomoki Tozuka(Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo), Hiroki Tokinaga(International Pacific Research Center, University of Hawaii), Masamichi Ohba(Central Research Institute of Electric Power Industry (CRIEPI), Environmental Science Research Laboratory), Yukiko Imada(Atmosphere and Ocean Research Institute, the University of Tokyo), Chair:Motoki Nagura(Japan Agency for Marine-Earth Science and Technology), Ayako Seiki(Japan Agency for Marine-Earth Science and Technology)

11:55 AM - 12:10 PM

[ACG37-04] In-situ observed detailed temperature profile in surface 10-meter layer over the tropical western Pacific

*Masaki KATSUMATA¹, Hugo BELLENGER¹, Kunio YONEYAMA¹ (1.JAMSTEC)

The oceanic thermal stratification in the first meters impacts significantly the energy exchanges between the atmosphere and the ocean by modulating the skin Sea Surface Temperature (SST). A thermistor chain was deployed from a research vessel to continuously measure the temperature profile in the ocean first 10 meters during 17 days in June 2013 in the tropical western Pacific (12N-135E). A clear diurnal cycle was captured with daytime warming in the first meters of the ocean that gradually decrease and deepened during the evening. In addition, a 0.5K-cooling event of the first meter with duration of about 3 hours was also captured during the passage of precipitating cloud system. By utilizing meteorological data from on-board instruments, we asses the relative importance of precipitation and accompanying cold pool in this cooling event.