NOAA/NOS/OCS/Coast Survey Development Laboratory
CBOFS2 Temperature and Salinity Sensitivity to River Forcing
Lyon Lanerolle1,2, Richard Patchen1 and Frank Aikman III1
1National Oceanic and Atmospheric Administration (NOAA)National Ocean Service/Office of Coast Survey/Coast Survey Development Laboratory
1315 East-West Highway, Silver Spring, MD 20910
2Earth Resources Technology (ERT) Inc.10810 Guilford Road, Suite 105, Annapolis Junction, MD 20701
NOAA/NOS/OCS/Coast Survey Development Laboratory
CBOFS2 Model Grid
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CBOFS2 Rivers for Forcing
River volume discharge adjustment factors (Wen Long)
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CBOFS2 Total River Volume Discharge
Events
Dry Periods
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Summer Time Surface Temperature Temperature (oC) Temp. Difference
(oC)
Difference = CBOFS2 with new river Q weights – original CBOFS2 hindcast run
NOAA/NOS/OCS/Coast Survey Development Laboratory
Summer Time Bottom Temperature Temperature (oC) Temp. Difference
(oC)
NOAA/NOS/OCS/Coast Survey Development Laboratory
Winter Time Surface Temperature Temperature (oC) Temp. Difference
(oC)
NOAA/NOS/OCS/Coast Survey Development Laboratory
Winter Time Bottom Temperature Temperature (oC) Temp. Difference
(oC)
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Summer Time Surface Salinity Salinity (PSU) Salt. Difference
(PSU)
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Summer Time Bottom Salinity Salinity (PSU) Salt. Difference
(PSU)
NOAA/NOS/OCS/Coast Survey Development Laboratory
Winter Time Surface Salinity Salinity (PSU) Salt. Difference
(PSU)
NOAA/NOS/OCS/Coast Survey Development Laboratory
Summer Time Bottom Salinity Salinity (PSU) Salt. Difference
(PSU)
NOAA/NOS/OCS/Coast Survey Development Laboratory
Summer Time Lower Bay Conditions
Difference = CBOFS2 with new river Q weights – original CBOFS2 hindcast run
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Summer Time Upper Bay Conditions
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Winter Time Lower Bay Conditions
NOAA/NOS/OCS/Coast Survey Development Laboratory
Winter Time Upper Bay Conditions
NOAA/NOS/OCS/Coast Survey Development Laboratory
Summary and ConclusionsCBOFS2 river volume discharges need adjusting to
compensate for ground, surface water effects, etc. Effect of adjustments clearly manifested in the CBOFS2 T
and S predictions Spatial (horizontal) T and S differences at surface and
bottom are similarDifferences in T mainly at Bay mouth, shelf and in tributaries
and ± 1 oCDifferences in S more clearly seen specially in tributaries and
are ± 1.5 PSUT, S differences in Bay axis appear to get washed out to the
Bay mouth & shelfSpatio-temporal (depth vs. time) T, S differences show that :
(i) in lower Bay they are localized near the surface but otherwise distributed throughout the water column, (ii) in upper Bay the differences are more stratified with less variations and (iii) Summer-Winter differences are not dissimilar