Argo float status in the Indian Ocean

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Argo float status in the Indian Ocean

• M. Ravichandran,
• INCOIS, Hyderabad, India

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Pre
436 floats in North of 40 S
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No of Floats/Year
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Argo float information
Data download
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Argo Users Workshop at INCOIS

• To know and understand
• What are the different applications using Argo
  data in Indian Ocean?
• What we have learned from Argo and what we need
  to learn?
• What are the efforts in assimilating Argo in
  OGCM?
• Whether spatial, temporal and vertical sampling
  is adequate for such applications?
• What are the products required for other
  applications from argo?
• Requirement of new parameters from Argo such as
  Oxygen, chlorophyll, etc

July 20-22, 2008
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Participating Institutions

• 63 Participants from 17 Institutions/University
• Andhra University, Vishakapatnam
• Cochin University of Science and Technology,
  Kochi
• Indian Institute of Technology, Delhi
• Indian Institute of Science, Bangalore
• Indian Institute of Tropical Meteorology, Pune
• Indian Navy
• INCOIS, Hyderabad
• Ministry of Earth Sciences, New Delhi
• Nansen Environmental Research Center, Kochi
• National Centre for Antarctic and Ocean Research,
  Goa
• National Centre for Medium Range Forecast, New
  Delhi
• National Institute of Oceanography, Goa
• National Remote Sensing Agency, Hyderabad.
• Naval Physical and Oceanographic Laboratory,
  Kochi
• Naval Operational Data Processing and Analysis
  Center, Kochi
• Space Application Centre, ISRO, Ahmedabad
• University of Hyderbad, Hyderbad

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Sessions

• Inaugural session
• Status of Argo project (Global India)
• Indian Ocean Process studies
• Indian Ocean dynamics and validation of models
• New sensor requirement
• Indian Ocean Dipole and Monsoon

26 contributed paper 5 Invited talks
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Invited talk

• Role of Argo data in monitoring climate change
  together with Coupled climate models Prof. J.
  Srininivasan, IISc
• Broad features of the Indian Ocean dynamics and
  thermodynamics, and some of the outstanding
  challenging problems Dr. R R Rao, NPOL
• The historical measurements of salinity in the
  Indian Ocean Dr. S. R. Shetye, NIO
• Development of Argo floats since 1950 interms of
  Technology - Prof. Stephen Riser, UW, USA
• Air-sea interaction over Indian Ocean with
  special emphasis on Indian Ocean dipole Prof.
  B. N. Goswami, IITM

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Indian Ocean process studies

• Buoyancy flux changes in the Bay of Bengal
• Upper ocean response of T S to local
  atmospheric forcing
• Mixed layer variability in Arabian Sea
• Delineating upwelling zones,
• Role salinity in thermal inversion in Arabian sea
• Validation of sonic layer depth
• Contribution of halo-steric height in dynamic
  height
• ..

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Indian Ocean dynamics and validation of models

• Impact of summer monsoon ISO in tropical Indian
  ocean using Argo and OGCM
• Surface currents from Argo, altimeter and
  scatterometer
• Validation of OGCM using Argo observations
• Analysed Ocean state using Argo and OGCM

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Indian Ocean dipole and monsoon

• Generation and termination of IOD mechanism
• Impact of IOD on SSS revealed from Argo,
• Role of subsurface Temp anomalies in the SW
  Indian Ocean during 2006 dipole event
• Indian Oean Monsoon interactions and drought
  over India in relation to Indian ocean
  sub-surface features

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Recommendations Suggestions

• Argo data has been widely utilized to understand
  the Indian Ocean dynamics, especially Dipole
  event, understanding the monsoon system in
  relation to heat content, buoyancy flux of the
  Indian Ocean and for validation of OGCM.
• Studies need to be initiated to assimilate Argo
  floats in OGCM
• In the Bay of Bengal, Argo floats with 5 days
  cycling period need to be deployed. These
  observations are to be sustained over a long
  period by deploying new floats as and when
  required. These observations are required for
  studying the intra-seasonal variations of
  thermo-haline structure.
• New Iridium floats with an additional
  high-resolution CTD are to be deployed in the Bay
  of Bengal. This additional CTD sensors measures
  P, T, S at very fine resolution (2 m) from 200 m
  upto the surface.
• Quality control methods followed by various
  institutions need to be pooled. All such
  Institutes to provide feedback on quality of data
  to INCOIS.

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• Thank you for your kind attention