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R/V Mirai CruisesVOS KATORI
VOS Delmas Blossebille
VOS MOL Wellington
ADCP Mooring
Wide Area XBT/XCTD
Harbour Bridge
OASIS Observations
TRITON Buoys
FORSGC/JAMSTEC Indian Ocean Activities
Subsurface ADCP Mooring System
Data interval: 1 hours
Ping interval: 6.66 sec
1 data = 27 pings average
Obs. range: 8m X 50 layers
Nov.2000
Oct.2001
Jul.2002
Jul.2003
Location: 0N, 90E
11 months 9 months 12 months
Zonal currents at 0N, 90E
2001 2002
20032002
Period 1 Period 2
Period 3
Power spectrum density of currents at 0N, 90E
Broad time-scale with strong 30-50 days
variability, shallower than 120 m depth
10-20 days variability above 100 m depth
Monthly mean zonal currents at 0N, 90E
Typical Wyrtki jet structure
The contour levels are chosen so that 75%, 50%, 25%, and 5% of the wavelet power is above each level, respectively.
Wavelet analysis for zonal currents at 0N, 90E
The contour levels are chosen so that 75%, 50%, 25%, and 5% of the wavelet power is above each level, respectively.
Wavelet analysis for meridional currents at 0N, 90E
1. Development of TRITON Array
2. Data from Indian Ocean TRITON
3. TRITON web page update plan
Yoshifumi KurodaJAMSTECJan 2004
Status of TRITON Array
Configuration of the TRITON
March, 1998 March, 1999 March, 2000
March, 2001 March, 2002 August, 2002
Development of TRITON buoy array from 1998 to 2002
Purposes; 1. Monitoring ENSO as TAO/TRITON array2. Air-sea interaction over the Pacific and Indian Ocean warm
pool 3. Variability of temperature and salinity in the warm pool - Improvement of the predictability of El Nino
TRITON Salinity 1.5S90E
TRITON Temperature 1.5S90E
TRITON Temperature 5S95E
TRITON Salinity 5S95E
Warm water accumulation associated with eastward jet in monsoon break period
High salinity water intrusion from Arabian Sea
2820
20
35.4
35.4
33.8
1.5S90E TRITON T and S
R/V Varuna Jaya, BPPT, Indonesia
New TRITON web page to be appeared from April 2004
Summary
R/V Mirai cruise in the Indian Ocean: ・ Next R/V Mirai TRITON cruise will be conducted June-July 2004 (departing on 4 July from Darwin, Australia and return on 1 August 2004 to Hachinohe, Japan).
Present status of Indian Ocean TRITON at1.5S90E & 5S95E: ・ This year, we recovered and re-deployed successfully the 1.5S90E TRITON, but we could not recover nor re-deploy the 5S95E due to the strong SE monsoon winds during the June-July R/V Mirai cruise.
・ The TRITON buoy at 5S95E have been recovered on 11 November 2003 by R/V Baruna Jaya 1 of BPPT Indonesia, but no re-deployment. All the met sensors had been stolen on the buoy, but we may have the internal data record of underwater sensors. We could avoid the lost of the buoy and save the internal record data, but since then, the data gap has started until the next R/V Mirai cruise.
Data delivery: ・ The data from TRITON buoys and detailed information on the project can be obtained from TRITON home page.http://www.jamstec.go.jp/jamstec/TRITON/
・ TRITON real time salinity data has been distributed through GTS since January 2003.
・ Re-constructing TRITON web data display and delivery system targeting the end of April 2004 to deliver all TRITON T and S. This early version web will deal real time T and S data of no quality control using post calibration data.
・ The second version can deal quality controlled T and S data will appear early 2005.
OASIS (Japan)OOS (India)
Deep Sea buoys (India)
Planed mooringsOn-going moorings
Shallow Water buoys (India)
OASIS
OOS
Deep Sea & Shallow Water Buoys
I-MAP A multi-national project to observe ocean conditions in the tropical western Indian Ocean. TAO-type buoys.
LODYC Upward looking ADCP mooring at 76E on the equator. Two additional ADCPs on the top of OOS buoys, or independent locations.
INSTANT An international project to measure the flow from the Pacific to the Indian Oceans. Current meters, ADCP, etc.
PMEL TAO-type array on the equator at first, and expand to off-equatorial area.
I-MAP (multi-national, leaded by South Africa)
INSTANT (multi-national)
LODYC (France)
Plan for mooring array in the tropical Indian Ocean