• Benji Baker• Mentor: Michael Schodlok• Division 324• August 20, 2008
ECCO2: Estimating the Circulation and Climate of the Ocean, Phase II
● Problem: How can we estimate the ocean state?
● High Resolution Global-Scale Ocean and Sea-Ice Data Synthesis
Outline
•How we record observations and collect data•Features of the model•Benefits to society•Website improvements•Data visualization•Outlook
Satellites
● TOPEX/Poseidon● JASON● OSTM/JASON-2
In Situ Data from Ocean Instruments
● Argo floats● XBT● CTD● PIRATA● Moorings● As a float ascends, a series of typically 200
pressure, temperature, and salinity measurements are made and stored on board the float. These are transmitted to satellites when the float reaches the surface.
Source: http://www-argo.ucsd.edu/ and the Office of Naval Research
MITgcm● ECCO2 data syntheses are obtained by
least squares fit of a global full-depth-ocean and sea-ice configuration of the Massachusetts Institute of Technology general circulation model (MITgcm) to the available satellite and in-situ data.
● An objective function, also called a cost function, expresses the extent of optimization: J = uTQ-1u + nTR-1n
JPL/ECCO2 Cubed-Sphere Solution
Terminology:● CS510● Grid spacing
What is the difference between ECCO and ECCO2?
● ECCO2 does a better job modeling the sea ice in the Arctic Ocean
● Higher resolution: 18 km
Why should we care?
● Climate forecasting● Fisheries● Oil barges● Coral reefs● Ship routes● Safe sailing
Experiments:
Experiments:
Dependency Tree:
Key Time Series:
Drake Passage Transport● The sverdrup is a unit of
measure of volume transport. It is equivalent to 106 cubic meters per second.
● Recent studies suggest that the water transport in the Gulf Stream steadily increases from 30 Sv in the Florida Current to a maximum of 150 Sv at 55°W longitude. The entire global input of fresh water from rivers to the ocean is equal to about 1 sverdrup.
● Mild climate of north-western Europe
Florida Strait Transport● The sverdrup is a unit of
measure of volume transport. It is equivalent to 106 cubic meters per second.
● Recent studies suggest that the water transport in the Gulf Stream steadily increases from 30 Sv in the Florida Current to a maximum of 150 Sv at 55°W longitude. The entire global input of fresh water from rivers to the ocean is equal to about 1 sverdrup.
● Mild climate of north-western Europe
MGPLOT GUI
MGPLOT GUI
MGPLOT GUI
MGPLOT GUI
Climate Change
Summary of Results and Outlook
● Easier, expanded data access!● Streamlined sensitivity experiments layout● Room for growth as the ECCO2 project progresses
(key time series, project highlights, ...)
Acknowledgements
● My mentors, Michael Schodlok and Dimitris Menemenlis
● JPL Education Office● SURF funding