MarVeL Workshop

Morning 2, Session 1: Focus on the Mariana vents – hydrosphere and hydrosphere-biosphere linkage

Session Chair: Satoshi Mitarai

Both morning sessions on Day 2 will include physical oceanography and bio-physical coupling. This session will start with a keynote talk on observational physical oceanography at mid-ocean ridges, and then proceed with a keynote and intermediate-length talk on bio-physical observations from AUV deployments in the Mariana Trough. We include some time to outline physical oceanographic observations that would inform circulation model development in the Mariana region.

8:30 Review MarVeL Workshop objectives - Mitarai and Stace Beaulieu

8:40 Observational physical oceanography at mid-ocean ridges - Andreas Thurnherr (login to see slide attached below for spatio-temporal scales of dispersal)

9:10 Spatial distribution of hydrothermal plume and SUP05 thiotrophic plume microbes in Mariana hydrothermal region - Michinari Sunamura

9:40 Use of ADCPs mounted on the AUV for mapping of echo intensities and current velocity vectors in hydrothermal area: a case of the South Mariana Trough - Kana Komaki

9:55-10:10 Guided discussion on flow specific to NW Pacific/Mariana region - Taichiro Sakagami

Regional orientation for physical oceanography:

Mariana Arc (aka Mariana Ridge, and sometimes called East Mariana Ridge) is the eastern border of the Philippine Sea. The Philippine Sea is separated into two major basins by the Kyushu-Palau Ridge at 135E: West Philippine Basin (to W) and West Mariana Basin (to E). The West Mariana Basin is separated into two 'sub'-basins by the West Mariana Ridge at 143E: the Parece Vela Basin (to W) and the Mariana Trough (to E). Also note: the West Mariana Basin is separated from East Mariana Basin by the Mariana Arc.

Articles relevant to Mariana region:

Kaneko et al 2001 Circulation of Intermediate and Deep Waters in the Philippine Sea. Journal of Oceanography Volume 57, Number 4, 397-420, DOI: 10.1023/A:1021565031846

Kawabe M. and S. Fujio (2010), Pacific Ocean Circulation Based on Observation, Journal of Oceanography, Vol. 66, pp. 389 to 403.

Kawabe, M., S. Fujio and D. Yanagimoto (2003): Deep-water circulation at low latitudes in the western North Pacific. Deep-Sea Res. I, 50, 631–656.

Kawabe, M. (1993): Deep water properties and circulation in the western North Pacific. p. 17–37. In Deep Ocean Circulation, Physical and Chemical Aspects, ed. by T. Teramoto, Elsevier Sci. Publishers, Amsterdam.

Kubota, M., and K. Ono (1992), Abyssal circulation model of the Philippine Sea, Deep Sea Research A, 39(9), 1439-1452, doi: 10.1016/0198-0149(92)90041-Q.

Kubota 1993 Numerical modelling of the Philippine Sea. Book Chapter, in Deep ocean circulation: physical and chemical aspects, By Toshihiko Teramoto.

Siedler et al 2004 Deep-Water Flow in the Mariana and Caroline Basins. JPO 34: 566-581. [NOTE: S MARIANA BACK-ARC VENTS AT APPROX 13N, 143.5E; consider this for Fig. 2]

Taira et al 2004 Deep and Bottom Currents in the Challenger Deep, Mariana Trench, Measured with Super-Deep Current Meters. Journal of Oceanography, Volume 60, Number 6, 919-926, http://www.terrapub.co.jp/journals/JO/pdf/6006/60060919.pdf. [NOTE: S MARIANA BACK-ARC VENTS AT APPROX 13N, 143.5E; consider this for Fig. 2]

Uehara and Taira 1990 Deep hydrographic structure along 12°N and 13°N in the Philippine Sea. Journal of Oceanography Volume 46, Number 4, 167-176, DOI: 10.1007/BF02125577

Wijffels et al. 1998 Multiple deep gyres of the western North Pacific: A WOCE section along 149°E. JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 103, NO. C6, PP. 12,985-13,009, doi:10.1029/98JC01016. [NOTE: THIS SXN IS E OF GUAM, i.e. East Mariana Basin]

Yoshioka et al 1988 Observation of the abyssal current in the West Mariana Basin. Journal of Oceanography Volume 44, Number 1, 33-39, DOI: 10.1007/BF02303148.