ITF Gateway Program - POGOocean-partners.org/.../files/public/attachments/907_ITF_Gateway.pdf ·...
Transcript of ITF Gateway Program - POGOocean-partners.org/.../files/public/attachments/907_ITF_Gateway.pdf ·...
04/01/2012
1
ITF Gateway Program
Dongchull JeonKORDI
POGO-13Honolulu, Jan. 9-11, 2012
Western tropical Pacific ITF portals
N.Pacific
S.Pacific
~zero
Topographic sill depths are shown in bold black numbersSchematic of ITF paths within the Indonesian seas shown by black dashed arrows
Luzon Strait
Karimata Strait
Sibutu Passage
ITF GATEWAY Program, 2013‐2015
Objective: to monitor the contribution to the ITF of Mindanao/Halmahera and Luzon Strait; how does
leakage into ITF depend on Mindanao Current
transport?
Instrumentation ~along the thick Black Lines: Mindanao/Halmahera; Luzon Strait.
HYCOM shows net throughflow at Luzon and Mindanao/Halmahera transports vary out‐of‐phase with ENSO.
Related: Makassar NOAA funded mooring
NOAA Makassar Mooring
04/01/2012
2
Luzon Strait
Mindanao/Halmahera
Makassar Strait
?
The imbalance of the westward flow [Mindanao-xx] and eastward flow [xx-Halmahera] marks the feed of tropical Pacific Water into Makassar Strait and Maluku Sea.
A
BC
A= B + C1986-1999 gray
04/01/2012
3
X PIES [approx bottom depth shown]X CPIES [approx bottom depth shown]M Current mooring: 2 LR ADCP, upward and downward set 500 m; current meters, 1500, near sea floor; microcat at sea floor; [approx bottom depth shown]
On deployment: CTD/LADCP [yo‐yo, tidal cycle] section. Repeat as often as possible in rotation and recovery cruises.
Ships: BJ8?, KORDI? US? China?
2 year deployment, 1 year rotation of all moorings [which upon study enables planning for a possible longer range plan, beyond the second year.
Luzon Strait by China [SIO: Zhu, Chen]?
x
x
x
x
x
x
~1000 m
M
M
M
M~3000 m m
~1000 m
~1000 m
~1000 m
~2500 m
~3500 m
04/01/2012
4
TIME TABLE:
• Fall/winter 2011/12: interact with collaborators: US, Korea, China, Indonesia] to build a preliminary program design; who does what?
• Present Preliminary Plan at the CLIVAR ITF TT meeting in Indonesia, week of 12 March 2012
• US component: NSF proposal Aug2012 [Thurnherr, Gordon, Watts]
• field work late 2013 to late 2015.
WEAKNESS: monitoring of Halmahera Eddy flow into Halmahera SeasHowever: ITF mainly North Pacific origin; Maybe at ITF TT meeting coverage of the
Halmahera Seas will emerge?
Drifter Tacks (Apr 1986 ‐ Sep 2010)