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This slideshow presents the CMEMS Ocean Model Capacity

LEVEL1 – For Beginners- Slides have been prepared in Nov 2016

C M E M S O c e a n M o d e l P r o d u c t s

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O u t l i n e

• What is an Ocean Circulation Model?

• Which Ocean Model Characteristics?

• What is CMEMS added value?

• Who are the CMEMS Ocean Model Producers?

• Which Ocean Model Products in CMEMS

catalogue?

Marine Monitoring

O u t l i n e

• What is an Ocean Circulation Model?

• Which Ocean Model Characteristics?

• What is CMEMS added value?

• Who are the CMEMS Ocean Model Producers?

• Which Ocean Model Products in CMEMS

catalogue?

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W H A T I S A N O C E A N C I R C U L A T I O N M O D E L ? ( 1 / 4 )

Marine Monitoring Ocean Models transform the continuous ocean into a discreet ocean with:

• discreet spatial grid • discreet time steps

Ocean Models describe the ocean properties using physical and biogeochemical relationships called the primitive equations. The primitive equations describe the sum of the forces applied to the ocean, the conservation of properties and the equation of state of the ocean. To apply primitive equations to the Ocean Model, we convert them to algorithms that can be applied to the gridded discreet ocean.

Fig Credits: The COMET Program, Mesoscale Ocean Circulation Models

W H A T I S A N O C E A N C I R C U L A T I O N M O D E L ? ( 2 / 4 )

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W H A T I S A N O C E A N C I R C U L A T I O N M O D E L ? ( 3 / 4 )

Ocean Model Algorithms are run everyday on Super Computers,

solving millions of equations at each grid point of the 3D discreet ocean grid.

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Ocean Models simulate several properties from the Surface

to the Sea Floor:

Physical parameters: • Temperature, salinity, currents, elevation or sea surface height (SSH),

sea ice, etc…

Biogeochemical parameters: • Chlorophyll-a, Primary Production, Dissolved Oxygen, etc…

Wave parameters: • Significant Wave Height, ….

W H A T I S A N O C E A N C I R C U L A T I O N M O D E L ? ( 4 / 4 )

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O u t l i n e

• What is an Ocean Circulation Model?

• Which Ocean Model Characteristics?

• What is CMEMS added value?

• Who are the CMEMS Ocean Model Producers?

• Which Ocean Model Products in CMEMS

catalogue?

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W H I C H O C E A N M O D E L C H A R A C T E R I S T I C S ? ( 1 / 2 )

Ocean Models simulate sea water properties:

• In 3 dimensions (from surface to bottom, displayed on a 3D grid)

• Through a period of time:

• A reanalysis of the past (CMEMS provides with 20 years in the past).

• An analysis of the current conditions.

• And continue into the future to provide a forecast. CMEMS provides

with 10-day forecast.

As a summary, one of the Ocean Models characteristics is that they

simulate sea water properties in 3D with 10-Day forecast when satellite data

only provide with 2D coverage without any forecast.

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W H I C H O C E A N M O D E L C H A R A C T E R I S T I C S ? ( 2 / 2 )

Ocean Model use Data Assimilation

Techniques to incorporate Satellite and In-situ

Observations into Models. It allows to correct

the ocean model to be closer to observed

conditions.

Data assimilation techniques also allow to

improve forecast skills.

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O u t l i n e

• What is an Ocean Circulation Model?

• Which Ocean Model Characteristics?

• What is CMEMS added value?

• Who are the CMEMS Ocean Model Producers?

• Which Ocean Model Products in CMEMS

catalogue?

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W H A T I S C M E M S A D D E D V A L U E ? ( 1 / 2 )

Reanalysis products: A new product every 1 to 2 years with optimal

accuracy and homogeneous time series

Real time products: A new product update every day, a few hours after

simulation

REANALYSIS (20years in the past) Real Time

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W H A T I S C M E M S A D D E D V A L U E ? ( 2 / 2 )

• Algorithms, Forcing and Parameterisations

are specific to each European Sea

characteristics.

• Validation: products are scientifically validated

following a thorough methodology.

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O u t l i n e

• What is an Ocean Circulation Model?

• Which Ocean Model Characteristics?

• What is CMEMS added value?

• Who are the CMEMS Ocean Model Producers?

• Which Ocean Model Products in CMEMS

catalogue?

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W H O A R E T H E C M E M S O C E A N M O D E L P R O D U C E R S ?

CMEMS MFC are composed of the following consortium:

• GLOBAL OCEAN:

• ARCTIC OCEAN

• MEDITERRANEAN SEA

• BLACK SEA

• BALTIC SEA

• IBERIA BISCAY IRISH SEAS

• EUROPEAN NORTH WEST SHELVES

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C M E M S G L O B A L M F C D A T A P R O D U C E R S

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C M E M S M E D S E A M F C D A T A P R O D U C E R S

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C M E M S B L A C K S E A M F C D A T A P R O D U C E R S

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C M E M S B A L T I C S E A M F C D A T A P R O D U C E R S

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C M E M S E U R O P E A N N O R T H W E S T S H E L V E S M F C D A T A P R O D U C E R S

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C M E M S I B E R I A N B I S C A Y I R I S H S E A S M F C D A T A P R O D U C E R S

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C M E M S A R C T I C O C E A N M F C D A T A P R O D U C E R S

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O u t l i n e

• What is an Ocean Circulation Model?

• Which Ocean Model Characteristics?

• What is CMEMS added value?

• Who are the CMEMS Ocean Model Producers?

• Which Ocean Model Products in CMEMS

catalogue?

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W H I C H P R O D U C T S I N C M E M S C A T A L O G U E ?

Ocean Models products over the GLOBAL Ocean and all European Seas are sorted into 2

categories:

• REAL TIME Model Analysis and Forecast GLOBAL_ANALYSIS_FORECAST_(PHY)or(BIO)or(WAV)_00x_xxx

ARCTIC_ANALYSIS_FORECAST_(PHY)or(BIO)or(WAV)_00x_xx

BALTICSEA_ANALYSIS_FORECAST_(PHY)or(BIO)or(WAV)_00x_xx

NORTHWESTSHELF_ANALYSIS_FORECAST_(PHY)or(BIO)or(WAV)_00x_xx

IBI_ANALYSIS_FORECAST_(PHY)or(BIO)or(WAV)_00x_xx

MEDSEA_ANALYSIS_FORECAST_(PHY)or(BIO)or(WAV)_00x_xx

BLKSEA_ANALYSIS_FORECAST_(PHY)or(BIO)or(WAV)_00x_xx

• MULTIYEAR Model Time Series: Reanalysis of the past GLOBAL_REANALYSIS_(PHY)or(BIO)_00x_xxx

ARCTIC_REANALYSIS_(PHY)or(BIO)_00x_xx

BALTICSEA_REANALYSIS_(PHY)or(BIO)_00x_xx

NORTHWESTSHELF_REANALYSIS_(PHY)or(BIO)_00x_xx

IBI_REANALYSIS_(PHY)or(BIO)_00x_xx

MEDSEA_REANALYSIS_(PHY)or(BIO)_00x_xx

BLKSEA_REANALYSIS_(PHY)or(BIO)_00x_xx

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• Note that Ocean currents in the Baltic Sea, European North West Shelves and Iberian Biscay Irish Seas INCLUDE Tidal Currents.

• Ocean currents in other areas (Global and Arctic Oceans and Mediterranean Sea) DO NOT INCLUDE Tidal Currents.

I m p o r t a n t i n f o r m a t i o n a b o u t T I D E S i n C M E M S M o d e l s

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I m p o r t a n t I n f o r m a t i o n a b o u t P O T E N T I A L V E R S U S I N - S I T U T E M P E R A T U R E i n C M E M S M o d e l s

• Note that the Temperature parameter given in all CMEMS Ocean Models is the POTENTIAL TEMPERATURE, denoted θ, hence including the water column pressure effect.

• POTENTIAL and IN-SITU TEMPERATURE do not differ at the ocean surface. Nevertheless, at the bottom of the ocean, POTENTIAL TEMPERATURE can be about half a degree warmer than IN-SITU TEMPERATURE, due to pressure effect of the above water column.

• https://en.wikipedia.org/wiki/Potential_temperature

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A n y q u e s t i o n , a n y t i m e : s e r v i c e d e s k . c m e m s @ m e r c a t o r - o c e a n . e u