1 / 4

Argo-Oxygen Program Overview

Argo-Oxygen Program Overview. White paper produced by writing team lead by Nicolas Gruber Scientific justification for measuring sub-seasonal to decadal O 2 changes: O 2 is rather sensitive to changes in circulation and biology

velma
Download Presentation

Argo-Oxygen Program Overview

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Argo-Oxygen Program Overview • White paper produced by writing team lead by Nicolas Gruber • Scientific justification for measuring sub-seasonal to decadal O2 changes: • O2 is rather sensitive to changes in circulation and biology • Subsurface O2 changes are an indication of oceanic export production • Important to understand ocean O2 outgassing for interpretation of the atmospheric O2 record • New sensor technology means drift and accuracy can be within the required limits OOPC 12th Session UNESCO

  2. Argo-Oxygen Program update • White paper presented to the AST-8 in March • Well received & AST supported Dr Gruber’s propsal for a coordinated pilot study • AST concerned over the effect on battery life, float failure rates, cost, and implications for current legal agreements • For the pilot study, it was agreed that SIC would oversee the project for the next phase and that Dr Gruber will continue to lead the Argo-Oxygen team. OOPC 12th Session UNESCO

  3. Technical issues • Choice of floats (ARGOS vs Iridium) • CTD pumps, data upload rates • Sensors types (IDO vs Optode) • Accuracy, drift • Adding O2 reduces battery life by 10-30% (can be compensated by more efficient Seabird CTD pump) • Increased cost (inc. sensors, data transfer) is 20-30%, and around 40% when reduced float lifetime is taken into account OOPC 12th Session UNESCO

  4. Implementation Phase • Deploy around 100 floats in a concentrated area of scientific interest (i.e. Nth Atlantic, Nth Pacific) • Cost for 2 years of floats ~$2.5M + ship time + regular Winkler titrations from ships to validate float obs • Integrate pilot study with i.e. biogechemical modelling studies to estimate export production OOPC 12th Session UNESCO

More Related