Marine Core Service MY OCEAN WP 14 Thematic Assemby Center Sea Ice and Wind.

MarineCore

Service

MY OCEAN

WP 14Thematic Assemby Center

Sea Ice and Wind

Marine Core Service

MyOcean : Second Annual Meeting / 27-28 April 2011 / Roma

Reminder - Partnership

WP 14Sea Ice & Wind TAC

(coordination)

R&D DevelopmentMaintenance

Production CalVal

met.no, KNMI

NERSCDMI

met.noKNMI

IFREMER

met.noKNMI

IFREMERDMIFMI

NERSCDNSCNERC

met.noKNMI

IFREMERDMIFMI

NERSCDNSCNERC

met.noKNMI

IFREMERDMIFMI

NERSCDNSCNERC

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Reminder - Objectives for R&D

Sea Ice Main objective– Finalize three “new” sea ice products:

Sea Ice Main issues – Develop of sea ice temperature, IST, product based on AVHRR.

The main error sources are clouds. – Ice berg detection from SAR – Automatic ice/water discrimination from SAR

Wind Main objective– Provide spatially and temporally consistent ocean eddy-scale

forcing Wind Main issues

– Exploit available satellite wind data sources that verifiably provide wind details on the ocean eddy scale, but which are poorly exploited by NWP analyses

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R&D : main achievements

Sea Ice Main achievements are

Ice berg product and IST products is ready and implemented in V1

Main Challenge SAR based ice water discrimination is delayed.

The algorithm is run in automatic mode every night for a test area in the Fram Strait. Preliminary results show that the method can discriminate ice from open water under various wind and ice edge conditions

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R&D : main achievements

WIND

Generate spatially and temporally consistent high-resolution wind fields

•Effective use of all available small-scale ocean surface wind information (more effective than NWP)

– ASCAT, SeaWinds, OSCAT, ERS scatterometer wind vectors

– Passive radiometer speeds

Improve momentum exchange, ocean circulation, waves, surges, …

A draft report with his findings is available

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Reminder - Objectives for Dev. & Maintenance

Objectives, difficulties, …– The SIW TAC will be a single unique entry point for satellite

derived sea ice and surface wind data for use in operational oceanography

– Consistent interfaces between each production unit

Steps, V0, V1, risks, issues, … – V0: MERSEA, PolarView, V1:Streamlined MERSEA, New

products , V2: MyOcean R&D updates, …– Risk:

• Lack of specifications of interfaces to MIS, • documentation load, …

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Dev. & Maint. : main achievements

Main achievements, Sea Ice The product assembly and dissemination system at met.no has been

developed, implemented tested and became V1 operational from mid December 2010.

The documentation and review process for MyOcean has been followed:Production Center PDR Workshop (ssPDR), Brest June 2010Production Center Acceptance Workshop V1, Rome October 2010

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Main achievements, Sea Ice, continues …To ensure a sustainable operation of the SIW TAC the Sea Ice Dissemination Unit is integrated as a part of the met.no’s operational system.

->All MyOcean compliant interfaces developed at met.no are developed according to the requirements for the operational environment within which no “black boxes” are accepted

Main difficultiesFull compliance with MyOcean specifications for e.g. web-based (HHTP) sub-setting and user-authentication has been delayed due to delayed specifications from MyOcean WP 2 on the interfaces

Remaining tasksCompliance with MyOcean specifications for e.g. web-based (HHTP) sub-setting and user-authentication

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Main achievements, Wind Interfaces between KNMI and Ifremer PU is established External interfaces between Ifremer PU and users are set up

–OPeNDAP service: http://www.ifremer.fr/thredds

– http service: http://www.ifremer.fr/thredds Interface with MIS/Service Desk

Global near real time wind fields have been operationally

transferred to MIS / Service Desk and are available at the MyOcean catalogue

http://www.myocean.eu/web/24-catalogue.php

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Reminder - Objectives for Production

Objectives, Products, Difficulties, …– Near real time and offline production, assembly, and distribution – Based on existing operational systems– Continuous monitoring of all contributing satellite systems and of

end products

Steps, risks V0 → V1 transition

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Production : main achievements

V1 Sea Ice products is accessed through the MyOcean catalogue, or directly through http://myocean.met.no/SIW-TAC/index.html

- via FTP - OpenDAP from met.no servers

Subsetting of products is available via a MyOcean-compliant service at met.no. Product metadata are updated and delivered to the MIS in MyOcean-compliant xml files on the fly.

Input data and product monitoring:

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SAR data availability: Availability January 2011

1

10

100

1000

10000

0,0 100,0 200,0 300,0 400,0 500,0 600,0 700,0

Size MB

Tim

e (

min

)

Esrin

Kiruna

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Difficulties / problems

Incident Log revealed two major interruption, one due to full discs, necessary correction taken

Product monitoring revealed delay of several products, up to 40 %, Partly due to access to more SAR data at the PUs Need to update the timeliness specifications

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Main achievements WIND are– The wind products, based on QuikSCAT and ASCAT retrievals,

have been processed and made available in near real time– Calibration and validation have been performed– The V1 wind products are available on the product catalogue

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Reminder - Objectives for Cal / Val

Objectives, difficulties, …– Regular validation of sea ice products– Problem: lack of ground measurements

• Regional ice analysis from National ice services used for validation

– Validation of these based on campaigns etc

– Consistent wind calibration of all satellite sources and ECMWF winds before blending

– Verification of all wind inputs with independent buoy winds and check their wind variability spectra for spectral cut-offs, etc

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Cal/Val : main achievements

Main achievements technical validation

A set of technical validation tests was performed autumn 2010 in connection with the PC Acceptance review. - External interfaces to satellite data suppliers- Interfaces between PUs and DU (met.no)- Product Content- Test of external interfaces (FTP and OpenDAP access) All tests was confirmed successfully

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Cal/Val : main achievements

Main achievements scientific validation

Scientific calibration was performed autumn 2010 in connection with the PC Acceptance review to validate all V1 products.

New validation has been performed after 3 months of V1 and some examples are presented below:

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Cal/Val : examples

Global sea ice products validet against DMI Greenland ice charts

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Cal/Val : examples

Regional ice cahrts visually compared to satellite images

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Cal/Val : examples

Ice thickness charts (blue) validated againstObservations from ice breakers (green)

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Cal/Val : examples

Validation of High Res Ice drift against In situ drifters

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Main Challenges

Technical Challenges– Keep it simple

Operational Challenges– MyOcean integration– Utilize existing infrastructure

Scientific Challenges Temporal description of eddy-scale winds Temporal description of eddy-scale winds Automatic products based on SAR Ice surface temperature: clouds

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Future Challenges

Scientific Challenges

– Analysis of the new remotely sensed data aiming to be used for V2 wind estimation.

– Enhancement of the objective method – Temporal description of eddy-scale winds

Technical Challenges– V2 interface with MIS / central Web Page

Operational Challenges– To ease user access / registration procedures

Ultimate Challenges …– MyO to work like one system

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Past (event, work or tasks achieved) :– December 2010 : V1 operational– April 2011 : V1 validated– –

Future :– September 2011: Automatic SAR classification integrated– June 2011: SIW TAC annual meeting– December 2011: V2 implemented

Calendar

Marine Core Service MY OCEAN WP 14 Thematic Assemby Center Sea Ice and Wind.

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