Intercomparison of low-frequency variability of the global 200 hPa circulation for AMIP simulations
In the Atmospheric Model Intercomparison Project (AMIP) a number of GCMs are integrated for a 10 year period, 1979-1988, all using the same monthly mean sea surface temperature (SST). This permits a useful intercomparison of the response of the models to the imposed SST. The variables used here for the intercomparison are the 200 hPa divergence and streamfunction. The data used are in the form of monthly averages and are filtered to a spatial resolution of T10, although the actual spatial resolution of the models varies from R15 to T42. The data are manipulated in this manner to concentrate on the low frequency, large scale response. The tools of the analysis are principal components analysis (PCA) and common principal components (CPC). These analyses are carried out on the 120 months of data with the seasonal cycle removed and in the case of the streamfunction with the zonal average also removed. The 1979-1988 period encompasses two El Nino/Southern Oscillation (ENSO) events (1982/83 and 1986/87), and as could be expected the ENSO characteristic response has a prominent impact in the model simulations.
- Research Organization:
- Lawrence Livermore National Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 236060
- Report Number(s):
- UCRL-ID--123617; PCMDI--32; ON: DE96009199
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
99 GENERAL AND MISCELLANEOUS
A CODES
B CODES
C CODES
CLIMATE MODELS
COMPARATIVE EVALUATIONS
COMPUTER CODES
D CODES
DATA ANALYSIS
E CODES
FREQUENCY ANALYSIS
G CODES
J CODES
L CODES
M CODES
MONTHLY VARIATIONS
N CODES
OCEANIC CIRCULATION
S CODES
SEAS
SPATIAL RESOLUTION
SURFACES
TEMPERATURE DISTRIBUTION
U CODES