OceanCurrent

David Griffin, Madeleine Cahill,

Jim Mansbridge, Jeff Dunn, Edward King

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The only way to measure sea level and velocity routinely all around Australia is by combining altimetry with tidegauges.

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Sea level, velocity, chl-a and temperature provide three complementary views of the ocean

OceanCurrent uses synoptic and in-situ data to provide quick-looks of ocean conditions

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2011-12: start

• Commenced August-Sept 2011• Renovate, prune, re-organise & re-brand CMAR RS web site• Move all content to AODN (new content is added using rsync)• Altimetry-derived data sets submitted daily to EMII. Exposed

instantly. http://opendap-vpac.arcs.org.au/thredds/catalog/IMOS/OceanCurrent/GSLA/NRT00/2012/catalog.html

• News Items (Ocean and Technical) posted opportunistically

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2011-12: Dec 2011 milestone

• Switched to using the L3U single-pass SST imagery produced for IMOS by BoM

• http://aodaac2-cbr.act.csiro.au:8080/thredds/catalog/imos/GHRSST/L3U/catalog.html

• This enabled high-res zooms for Esperance, GAB, Tasmania

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2011 – other progress

• Switched to using the NOAA Radar Altimetry Database System (RADS) – keeps us up-to-date with the latest corrections, for all altimeters

• Started including Cryosat altimeter in near-real-time analysis on 9 Dec 2011. The earned us a mention on the ESA News page.

• http://www.esa.int/esaCP/SEMI2KBX9WG_index_0.html

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Latest 18 days of Cryosat data

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Latest 7 days of Jason-2 data

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Latest 10 days’ data from 4 altimeters

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Each feature has a story to tell

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2011-12: work still in progress

• Using the IMOS L3S SST 3-day (day-only and night-only) composite produced by BoM as well as the CMAR composites

• Presently only showing the latter. Problem with cloud-flagging of night-time L3S has now been found.

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L3S 3-day SST composite (weighted mean) 3 nights (QL>=3) 3 days

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CMAR 3-day composite (65th percentile of all ‘good’ data)

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2011-12: what’s next

• March 2012: show IMOS chl-a on website• June 2012: new sea level analysis system (some elements in

place already)• minor requests, e.g. archive of single-pass-SST fli-animations

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2012-13: plans

• Sept 2012: show other IMOS data, e.g. gliders, SOOP, radars, moorings

• Dec 2012: News Items now regular• March 2013: Hindcast (1992-2011) altimetry-based products

lodged with EMII• June 2013: website in final form.

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Thank you

• Requests / questions / suggestions / complaints / offers?• http://www.altimetry2012.org• http://imos.aodn.org.au/oceancurrent/

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Sea level + SST = T(z)

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Eg present push is towards the coast.Correlation of Esperance with PISTACH Jason-2:

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cf standard IGDR version of Jason-2 data: