IndOOS update Godae Nov16 v1-2 ravi (1).ppt€¦ · IndOOS: the main actors CLIVAR‐GOOS Indian Ocean Region Panel “IORP” (co‐chairs L. Beal & J. Vialard) Excerpt from the

IndOOS: sustainable observations of the Indian Ocean.

Late 2016 status

J. Vialard and L. Beal (CLIVAR Indian Ocean Panel) with inputs from M. McPhaden & M. Ravichandran

Overview

• IndOOS: the main actors• IndOOS: the science drivers• IndOOS: current status• IndOOS: the future• Requested inputs from the Godaecommunity

IndOOS: the main actors

CLIVAR‐GOOS Indian Ocean Region Panel “IORP”(co‐chairs L. Beal & J. Vialard)

Excerpt from the terms of reference: “Provide scientific and technical oversight for a sustained ocean observing system for the Indian Ocean in order to provide ocean observations needed for climate variability research, and to underpin operational ocean applications and services relevant to the region, particularly with regard to ocean‐state estimation and climate prediction.”

Inputs from SIBER (Indian Ocean IMBER program) for biogeochemical & ecological‐related science issues


Indian Ocean component of GOOS “IO‐GOOS”(Chair: A. Schiller)

“IOGOOS is an Association of marine operational and research agencies in the Indian Ocean Region established (…) to co‐operate in promoting GOOS in the Indian Ocean region.”“encourage the development of appropriate regional and sub‐regional ocean and coastal observing systems and services.”


IO‐GOOS/IOC‐Perth IndOOS Resource Forum “IRF”(Convenor: new call for nominations underway)

“The IRF will comprise an international group of leaders from the IndOOS stakeholder community, derived from institutions and Governments that have the capacity to assign operational resources to IndOOS and/or facilitate resourcing for IndOOS.”


• IORP, SIBER, IO‐GOOS & IRF usually meet jointly once a year

• Next meeting: 30th Jan‐4th Feb in Perth, Australia, back to back with the second International Indian Ocean Expedition (IIOE‐2) steering committee

• A review of IndOOS will be initiated at this occasion (details later)

Overview


IndOOS: the science drivers

CyclonesMJO

Indian Ocean Dipole

Monsoons

Ocean Circulation

Trends

Biogeochemistry & Ecosystems

IndOOS: the science drivers (examples)

• IOD: a strong driver of regional climate variability• Predictability• Climate & biogeochemical impacts?

• The MJO: main mode of atmospheric intraseasonal variability, develops in the IO• Importance of air‐sea coupling?• Predictability?

MJO

Indian Ocean Dipole


Ocean response to monsoons now reasonably well understood, but still some key questions…

•How does the Indian Ocean feedback on monsons?

•How will monsoon respond to climate change, and influence the Indian Ocean?

•Biogeochemical impacts?• How will the high‐productivity Arabian Sea be

impacted

• How will the extensive subsurface low oxygen zones in the Northern Indian Ocean be impacted?

Monsoons

Biogeochemistry & Ecosystems


During the recent “hiatus” in global surface warming, the Indian Ocean has received more heat from the Pacific through the throughflow (Lee et al. 2015, Nieves et al. 2016, Liu et al. 2016): • Where is this heat?

• Will it be released back to the atmosphere?

• Key questions for decadal climate predictions: need to better understand circulation pathways and their variability.

Trends

Ocean Circulation

Overview


Multi NationalMulti InstitutionalMulti Platform

Core components:RAMA arrayArgo arraySurface driftersXBTs

RAMA Data Access

US Fiscal Year (Oct-Sept)

78% of sites occupied at present (36 of 46)

RAMA present status

RAMA Implementation

Piracy and ship time limitations have

slowed down implementation

36 in 2016

RAMA Implementation

While shiptime is still a limiting

factor, piracy has almost

disappeared in the Arabian Sea, open

possibilities for populating Arabian

Sea sites

Present status of Indian Ocean Argo floats

• 732 floats are active in the Indian Ocean (458 floats are active north of 30S)• Most new floats: iridium communication (higher vertical resolution ~ 2m)• Few Tens of floats with biogeochemical sensors (~ 10 cm vert. res. in the top 30 m)• 71 % of the float have been QC’ed in delayed mode

Present status of Iridium floats and Bio Argo floats

Present status of surface Drifters in the Indian Ocean

Tide gauge locations

122 active Tide gauges in the Indian Ocean

Active transects: IX01 ~ weeklyIX12 ~ monthlyIX15/21 ~ quarterly

XBT Sections in the Indian Ocean

2013 2014 2015

2016 (-> June)

Overview


IndOOS: the future

• Original IndOOS design is now 10‐years old• Time to review this design, to consider its

failures and successes, and to propose a way forward in the context of new scientific frontiers and observing technologies

IndOOS: the future

• Solicited talks will allow reviewing IndOOSscientific motivations and new observing technologies at the beginning of the next IOP/IO‐GOOS/SIBER/IRF meeting in early Feb. 2017

• IndOOS review conducted by a ~10 people expert group (IOP, IO‐GOOS, SIBER members & external experts)

IndOOS: the future

• A new white paper (possibly BAMS publication) will be written in 2017 to propose a re‐design of IndOOS

• An ad‐hoc committee will then review this white paper, with a face‐to‐face meeting back‐to‐back with the 2018 IOP/IO‐GOOS/IRF/SIBER meetings

• The final report based on these inputs will be delivered in 2018

IndOOS: the future

• Redesign of RAMA, taking into account past data return and logistical constraints

Currrent proposal by McPhaden, Ravichandran, Murty & Ando, to be discussed during the review.

IndOOS: the future

• Rationalize deep & BioArgo for the Indian Ocean• Take advantage of new technologies such as gliders

& C‐Pies• Liaise with monitoring efforts of ITF and Indian

Ocean boundary currents (Leewin current, Agulhas current): basin‐scale closure

Overview


Godae inputs

• T. Lee has agreed to join the early Feb meeting and to be part of the review process. Can act as a messenger from Godae.

• All inputs from Godae are welcome and will be taken into account during the review process:• What are the critical parts of present‐day IndOOS for

Indian Ocean state estimate?• What are the caveats of the present observing system

from an ocean state estimation perspective?

Documents

IndOOS update Godae Nov16 v1-2 ravi (1).ppt€¦ · IndOOS: the main actors CLIVAR‐GOOS Indian Ocean Region Panel “IORP” (co‐chairs L. Beal & J. Vialard) Excerpt from the