Contact: serofeev@coas.oregonstate.edu
egbert@coas.oregonstate.edu
OTIS Regional Tidal Solutions

OSU Tidal Data Inversion | Lana Erofeeva | Gary Egbert | Ocean Modeling | COAS | OSU
Downloads:
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  » INDIAN Ocean 1/12º 
  » Patagonian Shelf 1/30º
  » Island, 1/60º   
  » Africa 1/30º

  » OSU Tidal Prediction Software

  » OSU Tidal Prediction Software netcdf

  »Tidal Model Driver & ANTARCTIC

   » PO-ATLAS2011
PO frame on global map

Pacific Ocean, 2009
PO data sites
Bathymetry: GEBCO 1' database. Resolution: 1/12º; 1585x2065 grid; OBC: TPXO7.1
Constituents: m2, s2, n2, k2, k1, o1, p1, q1,m4,ms4,mn4
Data assimilated: Topex Poseidon 531 cycles (each 2nd along track); Topex Tandem 114 cycles
and ERS (108 cycles) in shallow water (all available data at H<1000m), 184957 data sites, 1330 representer sites.
Data for validation (not assimilated): tide gauges are shown with: blue (pelagic), red - shallow water tide gauges from the data set compiled by Richard Ray; blue filled with white - from some local data sets (Australian Tide Tables, Hawaii and USA coastal). PO2009 is about the same quality as TPXO7.2 for the open ocean, but essentiallly better in shallow water.

RMS misfit to 57 truth shallow tide gauges

Solution

M2

S2

K1

O1

N2

K2

P1

Q1

M4

RMS signal

54.11

27.29

23.09

14.36

12.37

7.78

6.83

3.11

1.60

Tpxo7.2

6.95

5.20

2.59

1.78

2.40

1.90

1.16

1.29

1.44

PO2009

4.90

4.04

2.24

1.74

2.63

1.58

1.14

0.88

1.08


RMS misfit to 17 USA West Coast coastal TG

Solution

M2

S2

K1

O1

N2

K2

P1

Q1

RMS signal

55.44

15.50

28.59

17.80

11.70

4.15

8.86

3.08

Tpxo7.2

12.58

4.63
3.54

2.30

2.90

1.64

2.06

0.75

PO2009

10.08

3.75

3.22

2.11

2.55

1.58

2.02

0.73

 

To extract tidal harmonic constants and/or predict tide using a regional tidal solution you MUST first download OTPS (OSU Tidal Prediction Software) or OPTPSnc (same as OTPS, but for our models in netcdf format). OTPS(nc) is written in Fortran 90 and tested under UNIX/Linux. The compressed and tarred OTPS(nc) packages contain README files with details on tidal solution installation and usage. There also exist a MATLAB toolbox, created in cooperation with  Laurie Padman (ESR), called Tidal Model Driver (TMD), functionally the same as OTPS. The TMD toolbox also includes a friendly graphical user interface. Use menu on the left to download TMD and/or Antarctic Tidal Models.

Research presented here was funded by the National Science Foundation, the Office of Naval Research and the National Aeronautics and Space Administration
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