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Operational Forecast Systems (OFS) and ADCIRC Tide Modeling Applications in support of NOAA’s VDatum. Frank Aikman III Chief, Marine Modeling & Analysis Programs Coast Survey Development Laboratory NOAA’S National Ocean Service May 5, 2011.

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operational forecast systems ofs and adcirc tide modeling applications in support of noaa s vdatum

Operational Forecast Systems (OFS) and ADCIRC Tide Modeling Applications in support of NOAA’s VDatum

Frank Aikman III

Chief, Marine Modeling & Analysis Programs

Coast Survey Development Laboratory

NOAA’S National Ocean Service

May 5, 2011

.

Acknowledgements to: Degui Cao, Changsheng Chen, Yi Chen, Emily Dhingra, Mary Erickson, Jesse Feyen, Yuji Funakoshi, Tom Gross, Kurt Hess, John Kelley, Maureen Kenny, Hong Lin, Lyon Lanerolle, Greg Mott, Ed Myers, Rich Patchen, Manchuan Peng, Dick Schmalz, Peter Stone, Cristina Urizar, Mark Vincent, Jindong Wang, Eugene Wei, John Wilkin, Jiangtao Xu, Zizang Yang and Aijun Zhang

outline
Outline
  • The state of NOS’s Operational Forecast Systems
    • Requirements and geographic coverage
    • CBOFS example and NGOFS regional approach
    • OFS products & dissemination
  • The Coastal Ocean Modeling Framework (COMF)
    • OBJECTIVE:More efficient R&D, O&M
  • VDatum
    • Present Coverage and Future Plans
    • New Software Release
nos marine modeling requirements

SST

Salinity

NOS Marine Modeling Requirements
  • Support of safe & efficient navigation
      • Water levels for under-keel clearance
      • Currents for right-of-way, maneuverability
  • Emergency response
      • HAZMAT
      • Homeland Security
      • Search & Rescue
  • For environmentally sound management of the coastal zone
      • Ecosystem applications
      • Marine geospatial applications
chesapeake bay operational forecast system cbofs
Chesapeake Bay Operational Forecast System (CBOFS)

CBOFS (3-D) Operational 04/11

Currents

Temp

Salt

CBOFS (2-D)

Operational 08/01

slide6

Specification of Environmental Conditions for CBOFS

Weather Forecast Models

NOS NWLON

NAM /WRF/NDFD

USGS Gages/NWS RFC’s

Basin or global ocean models

development of a northern gulf of mexico operational forecast system ngofs
Development of a northern Gulf of Mexico Operational Forecast System ( NGOFS)

Represents the

transition to a regional modeling approach.

Nested versions of the FVCOM model will be applied to cover six PORTS with a single OFS.

nos coastal operational forecast system products
NOS Coastal Operational Forecast System Products

Graphics on CO-OPS Web Site

  • Water levels, currents, temperature, salinity, and surface winds at selected locations
  • Time series plots of selected locations, contour and vector map plots, animations

Model data sets on NOAA’s WOC and CO-OPS THREDDS

  • Station/point netCDF files (6-minute output):
  • Time series at selected stations
  • Gridded model output netCDF files (hourly output)

Model visualization via nowCOAST GIS-Based Web Mapping Portal (WMS)

Users value usefulness, accessibility, reliability

  • Outputs used by USCG, NOS/OR&R, ASA, etc. in real-time
  • Web products used daily by coastal managers, maritime, navigation and emergency response communities.
  • Reliability and timely delivery of products are most important.
slide9

Individual Model systems

NOS Coastal Ocean Modeling Framework (COMF)

OPERATIONAL

MODELS

(NOAA’s HPC)

REAL-TIME

DATA

INGEST

QA/QC

(COMF)

  • Data Tank on CCS:
    • Atmospheric Forcing
    • Coastal Boundary Conditions
    • Riverine Fresh Water Inputs

Products and archives

Linux Server

in CO-OPS

FORECAST MODEL GUIDANCE

(water level, water temp, currents, & salinity)

PRODUCTS

(web pages and digital pt. & gridded data)

FOR USERS

tidesandcurrents.noaa.gov

QA/QC

(CORMS) 24 x 7

*Consistent with IOOS (DMAC); the Earth System Modeling Framework (ESMF); and COARDS/CF Conventions

coastal ocean modeling framework consists of middleware to manage workflow
Coastal Ocean Modeling FrameworkConsists of middleware to manage workflow

OBJECTIVE:More efficient R&D, O&M

PURPOSE:

  • Simplify Data Handling & Maintenance
  • Provide a Standard System for all Locations (NetCDF)
  • Share Skill Assessment and Evaluation Tools
  • Enable an efficient technology-transfer process
  • Various Models Allowed For Experimentation
    • ADCIRC, ECOM, EFDC, ELCIRC, FVCOM, POM, SELFE, QUODDY, ROMS
  • NOS selected two or three “corporate” models to move forward with
    • For OFS: Structured Grid - ROMS; Unstructured Grid – FVCOM
    • For VDatum Tidal Modeling and Storm Surge - ADCIRC

Consistent with IOOS (DMAC); the Earth System Modeling Framework (ESMF); and COARDS/CF Conventions

slide11

Prototype Test Bed: The Delaware Bay Model Evaluation Environment (DBMEE)

Bridgeton

Maurice River

Cape May

Cape Henlopen

Bathymetry

Grids

Metrics

Model Hindcast

COMMUNITY MODELS

ROMS, POM, ADCIRC, FVCOM, ELCIRC, SELFE, ....

Historical Data

Environmental conditions

Grids, Bathymetry, Environmental conditions

noaa nos coastal modeling challenges

SST

Likelihood

Of

Chrysaora

Salinity

NOAA/NOS Coastal Modeling Challenges
  • Continued/Active Collaboration with the Ocean Modeling Community
      • Transition from individual port models to a regional modeling approach
      • Coupled Model Systems:
      • Riverine-estuarine-regional/coastal-basin;
      • Hydrodynamic-wave; hydrodynamic-sediment transport
      • Physical-biogeochemical coupling (ecological; water quality; habitat)
        • HABs (Red Tide) in Gulf of Mexico
        • Hypoxia in the Chesapeake Bay and Northern Gulf of Mexico Shelf
  • Forecast uncertainty estimation
      • Probabilistic approach/Ensemble averaging
  • Data assimilation techniques
      • HF Radar; coastal altimetry; SST; IOOS data; etc.
  • Higher spatial resolution in key areas (e.g. in navigation channels; for storm surge and inundation modeling)
      • Nesting vs. unstructured grids;
      • Finite difference, finite element and finite volume approaches
vdatum coverage
VDatum Coverage

`

To Be Completed

July 1, 2011

  • Next Steps:
  • Puerto Rico/Virgin Islands, 2012
  • Model development & base data acquisition in Alaska
why adcirc for vdatum
Why ADCIRC for VDatum?
  • It is used to simulate the tides in order to reproduce spatially varying tidal datums.
  • Grids are composed of triangular elements of varying sizes, allowing larger elements to be used in deep waters (where tidal wavelengths will be longer) and smaller elements in shallow depths (shorter wavelengths and better resolution of nearshore features).
  • ADCIRC has been thoroughly tested and applied to a variety of benchmark and circulation studies.
  • We are using the 2D depth-integrated version of ADCIRC, as we are not resolving the vertical structure of the velocities or computing temperature and salinity. These barotropic 2D simulations run much faster than 3D models.
  • It has an MPI version, allowing us to run large grids using the High Performance Computing resources at NOAA’s ESRL facility in Boulder.
  • Excellent user group community and model support. ADCIRC is a proven “community model”.

www.adcirc.org

slide16

Where is ADCIRC used in the VDatum “Roadmap”?

Orthometric Datums

3D Datums

Tidal Datums

Calibrated Helmert Transformations

WGS 84 (G1150)

NGVD 29

WGS 84 (G873)

Tide Models

WGS 84 (G730)

MHHW

WGS 84 (orig.)

VERTCON

MHW

ITRF2000

ITRF97

MTL

ITRF96

NAD83 (NSRS)

NAVD 88

LMSL

ITRF94

DTL

ITRF93

ITRF92

MLW

ITRF91

ITRF90

GEOID99,

GEOID03

MLLW

ITRF89

TSS

(Topography of the Sea Surface)

ITRF88

SIO/MIT 92

NEOS 90

PNEOS 90

slide17

Higher High Water

High Water

Low Water

Lower Low Water

Generation of Tidal Datum Fields

ADCIRC model is used to generate time series of the tides at each grid point.

  • Final tidal datum fields are corrected to match observations at CO-OPS water level stations.
  • Corrections are made using TCARI, an interpolation tool based on solution of Laplace’s equation.

Tidal datums are computed from the time series at each grid point.

tcari corrected datum fields

Interpolation by Laplace’s Equation: ∆2f = 0

Subject to boundary conditions: f(xi, yi) = fiobs

f = datum, amp, cos(phase) ∂f/∂n = a∂f/∂n

TCARI

Tidal Constituent And Residual Interpolation

TCARI-Corrected Datum Fields

TCARI Interpolation Corrected TCARI

of Datum Tide Model Interpolation of Error

San Francisco Bay

tide modeling grids in support of vdatum
Tide Modeling Grids in Support of VDatum

Gulf of Maine

New York/LI Sound

North Carolina

Florida, Southeast US

Texas, Western Louisiana

new version of vdatum software
New Version of VDatum Software
  • Incorporates regional polygons to better define areas
    • For areas with differing tidal characteristics
    • Delineating borders between adjacent regions
    • Excluding highly changeable regions
  • Solves issue of overlapping grids
  • Automatically selects correct region
  • Identifies if additional regions need to be downloaded
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