The Effect of Vertical Resolution on Zonal Wind Stress in AMIP Runs [email protected].
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Transcript of The Effect of Vertical Resolution on Zonal Wind Stress in AMIP Runs [email protected].
![Page 2: The Effect of Vertical Resolution on Zonal Wind Stress in AMIP Runs Glenn.White@noaa.gov.](https://reader030.fdocuments.us/reader030/viewer/2022013004/56649d2a5503460f949feee7/html5/thumbnails/2.jpg)
An evaluation of
monthly means
from Suru Saha’s AMIP runs
with observed SST 1979-2001 PRX
28 versus 64 levels
Validation NCEP Reanalyses
CDAS, NCEP2
FSU Stresses 1978-2000
SOC flux climatology 1980-93
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SOC 1980-83
Zonal mean
Ocean
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5S-5N 1980-93
SOC
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5S-5N
Pacific FSU
1980-93 SOC
Time-mean
Us
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Pacific FSU
1979-2000
Time-mean zonal wind stress
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Annual Cycle
1980-93
Pacific
SOC
FSU
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CDAS
NCEP2
![Page 9: The Effect of Vertical Resolution on Zonal Wind Stress in AMIP Runs Glenn.White@noaa.gov.](https://reader030.fdocuments.us/reader030/viewer/2022013004/56649d2a5503460f949feee7/html5/thumbnails/9.jpg)
28 levels
64 levels
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28 levels-NCEP2
64-NCEP2
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64-28 levels
CDAS-NCEP2
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Time-mean zonal wind stress 1980-93 SOC
Magnitude of systematic difference
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CDAS
NCEP2
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CDAS-SOC
NCEP2-SOC
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28 levels
64 levels
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28 levels minus SOC
64-SOC
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Systematic difference from
FSU 1980-93 Mean
Tropical Pacific
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JJA 1980-93 Time mean zonal wind stress
FSU
28
64
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JJA 1980-93 Time mean zonal wind stress
SOC
CDAS
NCEP2
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28-FSU
64-FSU
64-28JJA 1980-93 Time mean zonal wind stress
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FSU-SOC
FSU-NCEP2
CDAS-NCEP2
JJA 1980-93 Time mean zonal wind stress
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Anomaly correlation with NCEP2
28
64
CDAS
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The reanalyses correlate better in time with FSU stresses than the AMIP runs, after the time-mean annual cycles are removed.
Monthly anomalies 1979-2000
Pacific
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Anomaly correlation with FSU--Pacific
CDAS
NCEP2
28 levels
64 levels
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Merid. Wind Stress
CDAS
NCEP2
28 levels
64 levels
Anomaly correlation with FSU merid. Wind stress
1979-2000
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Difference in anomaly correlation with FSU
28 – NCEP2
64-NCEP2
64-28
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FSU
Standard deviation of monthly anomalies
28 levels
64 levels
1979-2000
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28-FSU
64-FSU
64-28
Difference in standard deviation
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Standard deviation of monthly anomalies
1979-2000
CDAS
NCEP2
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CDAS-FSU
NCEP2-FSUCDAS-NCEP2
1979-2000
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64 levels do not produce better zonal wind stress than 28 levels.
Reanalyses display more agreement with SOC, FSU than AMIP runs.
64 level AMIP run too strong easterly stress in JJA, too strong westerly stress in JFM.