Extratropical Storm-Induced Coastal Inundation: Scituate, MA
Robert C. Beardsley 1, Changsheng Chen 2, Qichun Xu 2, Jianhua Qi
2, Huichan Lin 2 2 School for Marine Science and Technology
University of Massachusetts-Dartmouth New Bedford, MA 02744 1
Department of Physical Oceanography Woods Hole Oceanographic
Institution Woods Hole, MA 02543 E-mail: [email protected];
[email protected]; [email protected]; [email protected];
[email protected]
Slide 2
Overall Goal Investigate roles of model structure and physics,
waves, wave-surge interaction, grid resolution, computational
effort on hindcasting inundation on a local scale driven by an
extratropical storm in the Gulf of Maine. Objectives Hindcast
inundation at Scituate (MA) during two recent (2005 and 2007)
Noreasters using suite of models with the same grid and forcing;
Compare model output with available field data; Inter-compare model
output; Formulate initial comparison results and plans for
additional model tests.
Slide 3
Scituate, MAThe Test Site: 44013
Slide 4
A 3-D View of the bathymetry of the Scituate
Slide 5
Initial Test Storm Cases 1)May 24 2005 storm; 2)April 17, 2007
(Patriots Day) storm; 3)Model validation for tides: May 1-June 1,
2010 Boston tide gauge and NOAA 440013 Noreaster
Slide 6
Nested The Scituate Grid The Northeast Coastal Ocean Forecast
System (NECOFS) grid Horizontal Resolution: 10 m to 1 km Cell
number: 11153 Node number: 5620
STATIONS NODE NUMBER LONGITUDE LATITUDE A
3078-70.723365842.2058182 B5301-70.723999042.2021598
C5446-70.724861142.1981239 D4216-70.721405042.1923218
E2543-70.717208942.1955299 F5140-70.719886842.1993752
G3484-70.716301042.2028236 H2792-70.718231242.2070961
I1898-70.717887942.2078705 SECTIONS FROM NODE NUMBER LONGITUDE
LATITUDE TO NODE NUMBER LONGITUDE LATITUDE Section A 2410
-70.7221832 42.2072754 4133 -70.7191620 42.2062111 Section B 3646
-70.716316242.2017404 2149 -70.7152786 42.2042465 Section C 3401
-70.7259140 42.1923523 3576 -70.7204742 42.1923676 Points and
sections in the grid A B C D E F G H IA1 A2 C1 C2 B2 B1 Sites and
sections in the model grid
Slide 12
The Model Forcing and Boundaries for 2005 and 2007
/data/ftp/upload/Inundation/umass/fvcom_extratropical/2005_fine_grid1/wave_current/input/
/data/ftp/upload/Inundation/umass/fvcom_extratropical/2007_fine_grid1/wave_current/input/
The grid, forcing, boundary conditions, and initial conditions are
uploaded at 2005 storm: 2007 storm: Grid: sci_cor.dat --------The
latitude at each node: used for Coriolis term sci_dep.dat -------
The water depth at each node sci_grd.dat --------The model mesh
sci_obc.dat -------- Node numbers and types at the nesting boundary
sci_sigma11.dat --------Vertical coordinate levels and type
sci_spg.dat --------Sponge layer setup at the boundary (not need
here) sci_restart_wd.dat --------Restart file with types of nodes
and cells for the wet and dry
Slide 13
Input files for 2005 and 2007 1)Wind forcing (99 km WRF
hindcast field-the wind velocity at the 10-m height ) 2)Heat flux
and precipitation via evaporation (99 km WRF hindcast field) 3)The
sea level at the nodes of the nesting boundary (5 tidal
constituents: M2, N2, S2, K1 and O1 and subtidal sea level)
4)Velocity at the centers of cells Forcings: node_nest.nc
---------------------------------------Open boundary nesting file
restart20050501.nc ------------------------------- Restart file for
May 01 2005 model run wrf_for.nc or
gom_mm5_forcing_20050501-20050601.nc --- Winds, heat flux and P-E
2005 node_nest.nc ------------------------------------ Open
boundary nesting file restart20070401.nc
---------------------------- Restart file for April 01 2007 model
run wrf_for.nc ----------------------------------------- Winds,
Heat Flux and P-E 2007
Play the Googles based animation for the 2010 storm
Slide 40
Questions raised from the 2010 Noreaster storm simulation :
1.How could we improve the tidal simulation for the long-term
variation of the sea level? 2.How could we count the effects of the
snow? 3.Should we increase the time interval of the wind forcing
from one hour to a shorter period?
Slide 41
The Surface Wave Validations for 2005, 2007 and 2010
Storms