Frequently asked questions

Data and processing questions

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fold faq

Is it possible to estimate geostrophic currents from altimetry data?

Satellite altimetry allows to measure the Sea Surface Height (SSH) with a few centimeters precision. Appart from the equatorial band (ie, 5°N,5°S), the geostrophy can be assumed with a good certainty: it means that the slope of the sea surface measured by the altimeter along the satellite track is assumed to be DYNAMIC TOPOGRAPHY. In other word, it means that this slope is directly related to the pressure gradient at the sea surface, and thus, to a GEOSTROPHIC VELOCITY at the surface.

fold faq

I'd like to have some information about ocean bottom cartography.

You can have a look at our "Geophysics" section (in the "Applications"). Here are some websites with more information on this subject :

 

fold faq

I would like some information about El Niño.

On this subject, you can consult our web pages (including an extensive list of websites)

fold faq

I would like some information about tide time-tables.

We suggest you to consult these websites:
Tides and Altimetry
tbone.biol.sc.edu/tide/sitesel.html

fold faq

Where can I find information about sea waves (satellite imagery and also lectures)?

On this website
  - Wind and wave maps
  - Applications: Wind and waves: marine meteorology 

 

fold faq

I'm doing a report about currents (physical aspect, modelisation). Could you give me some adresses?

You can look at the Ocean application section

ocean circulation model :
- Southampton Oceanography Centre
- Ocean Surface Currents

fold faq

Can you give me anything about troposphere?

We do not study troposphere as such but only since troposphere crossing disrupt the radar wave of the altimeter
We rather suggest you to contact meteorological centers (ex. CNRM, UK met. office, ECMWF), atmospheric studies centers (ex. CETP), or dedicated satellite missions (Nasa's TES).

fold faq

Why is the sky blue ? Is it because the reflection of the sea ?

The blue of the sky is due to the way the oxygene molecule absorbs and diffuses light. The blue of the sea comes from another diffusion process, in the water. For more information on these subjects:
www.waterw.com/~science/blue.html , www.exploratorium.edu/snacks/blue_sky.html or world.std.com/~mmcirvin/bluesky.html (blue of the sky)

Altimetry questions

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fold faq

Is it possible to estimate geostrophic currents from altimetry data?

Satellite altimetry allows to measure the Sea Surface Height (SSH) with a few centimeters precision. Appart from the equatorial band (ie, 5°N,5°S), the geostrophy can be assumed with a good certainty: it means that the slope of the sea surface measured by the altimeter along the satellite track is assumed to be DYNAMIC TOPOGRAPHY. In other word, it means that this slope is directly related to the pressure gradient at the sea surface, and thus, to a GEOSTROPHIC VELOCITY at the surface.

fold faq

I'd like to have some information about ocean bottom cartography.

You can have a look at our "Geophysics" section (in the "Applications"). Here are some websites with more information on this subject :

 

fold faq

I would like some information about El Niño.

On this subject, you can consult our web pages (including an extensive list of websites)

fold faq

I would like some information about tide time-tables.

We suggest you to consult these websites:
Tides and Altimetry
tbone.biol.sc.edu/tide/sitesel.html

fold faq

Where can I find information about sea waves (satellite imagery and also lectures)?

On this website
  - Wind and wave maps
  - Applications: Wind and waves: marine meteorology 

 

fold faq

I'm doing a report about currents (physical aspect, modelisation). Could you give me some adresses?

You can look at the Ocean application section

ocean circulation model :
- Southampton Oceanography Centre
- Ocean Surface Currents

fold faq

Can you give me anything about troposphere?

We do not study troposphere as such but only since troposphere crossing disrupt the radar wave of the altimeter
We rather suggest you to contact meteorological centers (ex. CNRM, UK met. office, ECMWF), atmospheric studies centers (ex. CETP), or dedicated satellite missions (Nasa's TES).

fold faq

Why is the sky blue ? Is it because the reflection of the sea ?

The blue of the sky is due to the way the oxygene molecule absorbs and diffuses light. The blue of the sea comes from another diffusion process, in the water. For more information on these subjects:
www.waterw.com/~science/blue.html , www.exploratorium.edu/snacks/blue_sky.html or world.std.com/~mmcirvin/bluesky.html (blue of the sky)

Applications questions

Show all / Hide all

fold faq

Is it possible to estimate geostrophic currents from altimetry data?

Satellite altimetry allows to measure the Sea Surface Height (SSH) with a few centimeters precision. Appart from the equatorial band (ie, 5°N,5°S), the geostrophy can be assumed with a good certainty: it means that the slope of the sea surface measured by the altimeter along the satellite track is assumed to be DYNAMIC TOPOGRAPHY. In other word, it means that this slope is directly related to the pressure gradient at the sea surface, and thus, to a GEOSTROPHIC VELOCITY at the surface.

fold faq

I'd like to have some information about ocean bottom cartography.

You can have a look at our "Geophysics" section (in the "Applications"). Here are some websites with more information on this subject :

 

fold faq

I would like some information about El Niño.

On this subject, you can consult our web pages (including an extensive list of websites)

fold faq

I would like some information about tide time-tables.

We suggest you to consult these websites:
Tides and Altimetry
tbone.biol.sc.edu/tide/sitesel.html

fold faq

Where can I find information about sea waves (satellite imagery and also lectures)?

On this website
  - Wind and wave maps
  - Applications: Wind and waves: marine meteorology 

 

fold faq

I'm doing a report about currents (physical aspect, modelisation). Could you give me some adresses?

You can look at the Ocean application section

ocean circulation model :
- Southampton Oceanography Centre
- Ocean Surface Currents

fold faq

Can you give me anything about troposphere?

We do not study troposphere as such but only since troposphere crossing disrupt the radar wave of the altimeter
We rather suggest you to contact meteorological centers (ex. CNRM, UK met. office, ECMWF), atmospheric studies centers (ex. CETP), or dedicated satellite missions (Nasa's TES).

fold faq

Why is the sky blue ? Is it because the reflection of the sea ?

The blue of the sky is due to the way the oxygene molecule absorbs and diffuses light. The blue of the sea comes from another diffusion process, in the water. For more information on these subjects:
www.waterw.com/~science/blue.html , www.exploratorium.edu/snacks/blue_sky.html or world.std.com/~mmcirvin/bluesky.html (blue of the sky)

Doris questions

Show all / Hide all

fold faq

Is it possible to estimate geostrophic currents from altimetry data?

Satellite altimetry allows to measure the Sea Surface Height (SSH) with a few centimeters precision. Appart from the equatorial band (ie, 5°N,5°S), the geostrophy can be assumed with a good certainty: it means that the slope of the sea surface measured by the altimeter along the satellite track is assumed to be DYNAMIC TOPOGRAPHY. In other word, it means that this slope is directly related to the pressure gradient at the sea surface, and thus, to a GEOSTROPHIC VELOCITY at the surface.

fold faq

I'd like to have some information about ocean bottom cartography.

You can have a look at our "Geophysics" section (in the "Applications"). Here are some websites with more information on this subject :

 

fold faq

I would like some information about El Niño.

On this subject, you can consult our web pages (including an extensive list of websites)

fold faq

I would like some information about tide time-tables.

We suggest you to consult these websites:
Tides and Altimetry
tbone.biol.sc.edu/tide/sitesel.html

fold faq

Where can I find information about sea waves (satellite imagery and also lectures)?

On this website
  - Wind and wave maps
  - Applications: Wind and waves: marine meteorology 

 

fold faq

I'm doing a report about currents (physical aspect, modelisation). Could you give me some adresses?

You can look at the Ocean application section

ocean circulation model :
- Southampton Oceanography Centre
- Ocean Surface Currents

fold faq

Can you give me anything about troposphere?

We do not study troposphere as such but only since troposphere crossing disrupt the radar wave of the altimeter
We rather suggest you to contact meteorological centers (ex. CNRM, UK met. office, ECMWF), atmospheric studies centers (ex. CETP), or dedicated satellite missions (Nasa's TES).

fold faq

Why is the sky blue ? Is it because the reflection of the sea ?

The blue of the sky is due to the way the oxygene molecule absorbs and diffuses light. The blue of the sea comes from another diffusion process, in the water. For more information on these subjects:
www.waterw.com/~science/blue.html , www.exploratorium.edu/snacks/blue_sky.html or world.std.com/~mmcirvin/bluesky.html (blue of the sky)

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