Progress ReportJuly 2012

I. Coupled Physical-Biological modeling inSABGOM (SABGOM-BIO, carbon component);

II. Coupled Sediment Transport Modeling inBohai Sea, Yellow Sea, and East China Sea,(BYESED)

SABGOM BIO• Simulated pCO2 against observation from UGA team

Jan 08 2005, n=257, r=0.56

SABGOM BIO• Simulated pCO2 against observation from UGA team

Jan 14 2005, n=8560, r=0.41

SABGOM BIO• Simulated pCO2 against observation from UGA team

Aug 05 2005, n=10180, r=0.23

SABGOM BIO• Simulated pCO2 against observation from UGA team

Oct 17 2005, n=1006, r=0.05

SABGOM BIO• Simulated pCO2 against observation from UGA team

Dec 20 2005, n=1019, r=0.73

Problems and Possible Fix

• Simulated pCO2 is generally higher than observations; Simulated pCO2 is in better agreement with observations during winter (Dec, Jan) than other seasons (Aug, Oct);

• Possible solutions

CPP: conservative alkalinity

River Input: turn on/off DIC alkalinity inputs

Atmospheric CO2 concentration

BYESED

• Coupled wave-ocean-sediment transport modeling (COAWST)

• ~50 year hindcast (1958-2006)

• Realistic forcings (atmospheric, ocean, & river input)

Results by the end of 1965 (8 yrs)Yellow River Sediments

Results by the end of 1965 (8 yrs)Yangtze Sediments

• Model stops after 8 yrs simulation (1958-1966 or 1966-1974);• Solution- memory issue?- Reduce history

file output variables;

• Other difficulties: 1.5T external disk for omglnx6 and omglnx9 signaled on/off frequently

Problems and Possible Fix

July-16 Progress Report

• BYESED (East China Sea sediment transport)1) Try to run COAWST on RENCI, failed– COAWST

support NETCDF 3.X; RENCI only have 4.X;2) Try to run uncoupled (SWAN/ROMS independently)— Results are different from coupled even no wave-

current interaction is activated– SWAN read UV/Zeta from ROMS from time to time

3) Try to run coupled case, increase SWAN step (10min – 20 min) and reduce SWAN-ROMS coummunication (4-hourly to daily): 64 processors on He2, will take < 10 days for an experiment (in-process)

Plan for next week and Problems

• Finish one BYESED experiment

• Look into SABGOM_BIO application if processors are available (compare in-situ T/S observation)

• Problems: external disk lost connection even touch/cp every 0.5 hours

Progress Report July 23rd

• What I have done• BYESED application: 1.increase SWAN-ROMS communication interval to 1

day, SWAN timesteps to 20 mins; 2.Using COAWST v587, model stop again around year

1977; 3. Using COAWST v411, model stop around year 1972

because of disk space on share2• SABGOM_NF system 1. generate particle release webpage at

http://omglnx9.meas.ncsu.edu/zxue/SABGOM/track.html

Progress Report July 23rd

• What to do in this week

Continuous look into BYESED application, try to using restart option once model stops;

Working on SABGOM_BIO if time permits;