hawaiian islands operational system joao marcos a c souza brian powell contributions: dax mattews...
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Hawaiian Islands Operational System
Joao Marcos A C SouzaBrian Powell
Contributions:
Dax MattewsIvica Janekovic
Jim Potemra – Data management
Hawaiian Islands Operational System
PacIOOS is one of eleven regional observing programs in the U.S. that are supporting the emergence of the U.S. Integrated Ocean Observing System (IOOS®) under the National Oceanographic Partnership Program (NOPP).
The PacIOOS region includes the U.S. Pacific Region (Hawaii, Guam, American Samoa, Commonwealth of the Northern Mariana Islands), the Pacific nations in Free Association with the U.S. (Republic of the Marshall Islands, Federated States of Micronesia, Republic of Palau), and the U.S. Minor Outlying Islands (Howland, Baker, Johnston, Jarvis, Kingman, Palmyra, Midway, Wake).
Hawaiian Islands Operational System
http://oos.soest.hawaii.edu/pacioos/
Hawaiian Islands Operational System
Hawaiian Islands Operational System
Hawaiian Islands Operational System
~6km horizontal resolution
~2km horizontal resolution
~60m horizontal resolution
30 vertical layers
WRF forcing
TPXO tides
NCOM Boundary Conditions
Hawaiian Islands Operational System
The System assimilates (4DVar):
Along track SLA
Swath SST
HF radar velocities
Gliders, Argo floats and shipboard CTDs
Hawaiian Islands Operational System
Along track SLAEnvisatJason 1Jason 2
OSTM/Jason 2 map of sea-level anomalies from July 4 to July 14, 2008
SLA rmsd
Hawaiian Islands Operational System
Swath SSTModis – 2 primary satellite passes per day
SST
SST Bias
Hawaiian Islands Operational System
HF radars
Koko Head
Kaka'ako
Kalaeloa
(oos.soest.hawaii.edu/pacioos/voyager/index.html)
Radar radial mean currents
Radar mean currents after data qualification process and merge of all available antennas.
Radar radial mean currents
Radar mean currents after data qualification process and merge of all available antennas.
Radar radial currents rmsd
HIIG HIOG
Radar radial mean currents cross-spectrum - HIOG
HIOGPhase shift:
M2: -0.04hK1: -0.24h
Model
Radar
Radar radial currents HIOG – Mean and standard deviation
Radar radial currents EOF 1HIOG
48.11% 31.52%
Hawaiian Islands Operational System
Gliders (http://hahana.soest.hawaii.edu/seagliders/index.php), Argo floats, and shipboard CTD -
station ALOHA – established in 1988.(http://aco-ssds.soest.hawaii.edu/ALOHA/)
TS relations (gliders+argo)
TS relations (gliders+argo)
TS relations (gliders+argo)
TS relations (gliders+argo)
TS relations (gliders+argo)
T and S errors (model-observations)
0 - 10m 10 - 50m
Temperature
Salinity
0 - 10m 10 - 50m
Validation conclusions
More observed SLA variance on the windward side of the islands than shown by the model.Satellite tracks are too sparse in both time and spaceAnalyze impact of gridded products assimilation
Good representation of the water column structure, with problems concentrated near the surface.
Good representation of the barotropic tides, but less energy in the low frequency than shown by the HF radars.Analyze the impact of the internal tides on the differences between model and observations – Expected to by large.
SST diurnal variability is not accurately resolved by the simulation.
Modified vertical coordinate
σ (k )=− k2−2kN+k+N 2−N
N 2−N−ω k
2−kN1−N
second order Legendre polynomial.
Modified vertical coordinate
Quadratic σ, stretching 4;
linear σ, stretching 4;
linear σ, stretching 2;
HIIG grid section at 19.28°N
Modified vertical coordinate
Modified vertical coordinate
Small variation of the first layer thickness !