1. Discussion of Argo Implementation

2. Basics ~ 375 3x3 boxes 10S-10N in tropical Pacific
Around W Pacific
Currently 400 floats in TP
~ 14,500 profiles per year; ~2,500
Distribution not even; equatorial distribution?
1st Report calls for doubling
 +80 for WP (20 per year if 4 year lifetime)
Begin enhancement in the WP
14-May-19
TPOS 2020 T&I

3. TPOS requirements Maximising residency time in TP important
Favour Iridium and other “rapid” comms/positioning
Reseeding rate does not depend on cycle time
Short  refresh more often but fewer floats
Entry-exit rates (ZL) manageable
May need targeted deployment
BGC float requirement is additional
… but can contribute
14-May-19
TPOS 2020 T&I

4. Our potential? +10 French floats – can they be WP deployed?
Chinese national Argo programme aiming to increase by 4x (~ 100 to ~ 400)
Perhaps 20% might be W Trop. Pacific?
Perhaps 10% may be BGC or non-Argo?
Probably need additional contributions ~ 20.
14-May-19
TPOS 2020 T&I

5. Timing
This spin-up will likely occur in parallel with the TMA rebuild
Should we recognize a Western Pacific TPOS 2020 Implementation Project?
Alternatively should we be using studies/expts to evolve density?
Aim for full by end of 2020?
Learning by doing …
Phasing of entire TP is dependent
There will be “exit”s to central/east
14-May-19
TPOS 2020 T&I

6. 14-May-19
TPOS 2020 T&I

7. 14-May-19
TPOS 2020 T&I

8. Courtesy Paul Chang, IOVWST/NOAA
14-May-19
TPOS 2020 Forum