Chawla et al., Dec. 4. 2013NCEP production suite review, 1/18 Review of the NCEP production Suite: Recent Changes and Plans Marine Modeling and Analysis.

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Chawla et al., Dec NCEP production suite review, 1/18 Review of the NCEP production Suite: Recent Changes and Plans Marine Modeling and Analysis Branch Wave Numerical Guidance Arun Chawla Marine Modeling and Analysis Branch NOAA / NWS / NCEP / EMC WHERE AMERICA’S CLIMATE WEATHER AND OCEAN SERVICES BEGIN

Chawla et al., Dec NCEP production suite review, 2/18 Wind waves  Operational models Multi-1 global model. Multi-2 global hurricane model. Great lakes with 2 staggered cycles (NAM driven and NDFD driven) NCEP wave ensemble system Combined FNMOC/NCEP wave ensemble system Nearshore Wave Prediction System (Alpha testing)

Chawla et al., Dec NCEP production suite review, 3/18 WAVEWATCH III ® WAVEWATCH III ® is the model driver for all operational wave model products from NCEP The model has transitioned from an in house NCEP model to a community model (code management is still controlled at NCEP via SVN) The model is part of an international 5 year NOPP study to improve operational wave models (currently in its 4 th year). Active developers of the wave model NCEP NRL IFREMER / SHOM UKMO SWINBURNE UNIVERSITY NASA UNIVERSITY OF RHODE ISLAND UNIVERSITY OF NEW SOUTH WALES Operational model of choice at UKMO, METEO-FRANCE, BOM, INCOIS, FNMOC, NAVOCEANO, ENVIRONMENT CANADA

Chawla et al., Dec NCEP production suite review, 4/18 WAVEWATCH III ® A new public release of the wave model is planned for late Feb 2014 (first public release since v 3.14 in 2007) New features that have been introduced into the wave model Multiple new physics packages for wave growth and dissipation Alternative non-linear wave interaction source terms Coastal wave reflections Wave blocking from icebergs Unstructured, curvilinear and SMC grid types Wave – mud and wave – ice interactions Infra gravity wave propagation Non-linear wave interactions in shallow waters Grid splitting to allow for hyper scaling An expanded set of output parameters NETCDF I/O capability Post processing tools for wave system tracking

Chawla et al., Dec NCEP production suite review, 5/18 Multi_1 global model  Last year this was the first wave model that was upgraded to one of the new physics wave packages that were added to WAVEWATCH III (first upgrade of wave physics in over 15 years) Skill scores at 72 hrs. forecast Wave Ht (m) Wind Speed (m/s)

Chawla et al., Dec NCEP production suite review, 6/18 Multi_1 global model Planned upgrades over the next year To extend the model domain up to the North Pole with a curvilinear grid (current domain stops at 82 N). Wave grids will be upgraded to use ETOPO-1 bathymetry and regional domains will be expanded to make sure that all the Centers domain requirements are met In the near future … Replace regular coastal /regional grids with unstructured grids. Couple with ESTOFS Global grids to upgrade resolution with GFS model Couple the global wave model with the global circulation model HYCOM

Chawla et al., Dec NCEP production suite review, 7/18 Multi_1 global wave model Resolution: 0.25 deg (offshore) to ~2 km (nearshore) Replaces 4 and 10 arc-min regular grids Resolution: 4 arc-min (coastal) and 10 arc-min (regional) grids Curvilinear Arctic grid to replace regular Arctic grid

Chawla et al., Dec NCEP production suite review, 8/18 East Coast mesh (0.25 deg – 2 km) Two-way WW3-ESTOFS coupling under development EC2001 mesh

Chawla et al., Dec NCEP production suite review, 9/18 Multi_2 global wave model Multi_2 global wave model is driven by Hurricane model winds This year the multi_2 system will be upgraded to the new wave physics that have already been implemented for multi_1 and the Great Lakes systems The wave model will be driven by HWRF winds (currently driven by the GFDL hurricane model) Moving towards a coupled wave-circulation- atmospheric model in the NEMS framework (depend on developing a moving grid capability in WAVEWATCH III)

Chawla et al., Dec NCEP production suite review, 10/18 Wave ensemble system Wave ensemble system consists of a 21 member ensemble on a 1 deg grid driven by GEFS Planned Upgrades Increase resolution to 0.5 deg Upgrade wave model to new physics package Add a hindcast phase using 80 members (20 at any given cycle) to provide a 24 hr cycle Upgrade to increased GEFS resolution winds (when they become available) A combined NCEP / FNMOC wave ensemble product FNMOC to coordinate ensemble model grids with NCEP ENVIRONMENT CANADA to join with NCEP and FNMOC to develop a combined wave ensemble product

Chawla et al., Dec NCEP production suite review, 11/18 Sandy 120h 72h 24h 96h 48h 0h

Chawla et al., Dec NCEP production suite review, 12/18 Great Lakes wave model For the Great Lakes we have a staggered cycle system – an early run that is NAM winds driven and a late run that is NDFD winds driven Last quarter the Great Lakes wave model was upgraded to use the newer physics packages Significant improvement has been observed in the operational model

Chawla et al., Dec NCEP production suite review, 13/18 Great Lakes wave model  Planned upgrades Spatial resolution increase ~2km to use the higher resolution NAM and NDFD winds Better representation of the coastlines using shapefiles from NOAA coastlines database Add RTMA surface analysis for NDFD driven hindcasts Develop an ensemble wave model for the Great Lakes together with ENVIRONMENT CANADA Develop a coupled wave – atmospheric – circulation model for the Great Lakes in partnership with NOS, GLERL and WFO Detroit

Chawla et al., Dec NCEP production suite review, 14/18 Great Lakes Courtesy of Eric J. Anderson, Dave Schwab (GLERL), Greg Lang (GLERL )

Chawla et al., Dec NCEP production suite review, 15/18 Nearshore Wave Prediction System (NWPS) High-resolution wave guidance in the nearshore. Applications: wave system tracking, ship routing, rip current and wave runup guidance Centrally supported by NCEP, but runs locally at WFOs. Driven by forecaster-developed winds from GFE, WW3 BCs and RTOFS/ESTOFS. To be included in the AWIPS II baseline. WRF/NAM

Chawla et al., Dec NCEP production suite review, 16/18 Alpha testing at all SR WFOs, NHC/TAFB, select WC and EC WFOs 1 arc-min grid, nesting down to 500 m 90 h forecast, 3 hourly WFO MFL NWPS coverage and sample output

Chawla et al., Dec NCEP production suite review, 17/18 Related developmental/validation projects NOPP Project IOOS COMT Test bed: Waves and surge in Puerto Rico & U.S. Virgin Islands ESMF capability in wave model for coupling 30 year wave hindcast (with new physics/grids) Sandy Supplemental – incorporating time dependent PSURGE fields into NWPS system Participation in inter-agency effort to comply with the COASTAL Act of 2012 (White papers, NSEM) NWPS implementation over OPC Atlantic domain (similar to TAFB) Development of a wave data assimilation system Hyper-scaling of the wave model to allow an order of magnitude upgrade in parallelization of the wave model Development of a moving grid wave model Coupling with circulation / atmospheric models for climate studies

Chawla et al., Dec NCEP production suite review, 18/18