The effects of sampling frequency on the climate statistics of the ECMWF general circulation model

Technical Report · Tue Sep 01 04:00:00 EDT 1992

OSTI ID:6755318

Phillips, T J; Gates, W L ^[1]; Arpe, K ^[2]

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1. Lawrence Livermore National Lab., CA (United States)
2. Max-Planck-Institut fuer Meteorologie, Hamburg (Germany)

The effects of sampling frequency on the first- and second-moment statistics of selected EC model variables are investigated in a simulation of perpetual July'' with a diurnal cycle included and with surface and atmospheric fields saved at hourly intervals. The shortest characteristic time scales (as determined by the enfolding time of lagged autocorrelation functions) are those of ground heat fluxes and temperatures, precipitation and run-off, convective processes, cloud properties, and atmospheric vertical motion, while the longest time scales are exhibited by soil temperature and moisture, surface pressure, and atmospheric specific humidity, temperature and wind. The time scales of surface heat and momentum fluxes and of convective processes are substantially shorter over land than over the oceans.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6755318
• Report Number(s): UCRL-ID-108226; PCMDI--5; ON: DE93003338
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540110*
58 GEOSCIENCES
580000 -- Geosciences
CLIMATE MODELS
CLIMATES
CLOUDS
CONVECTION
ENERGY TRANSFER
ENVIRONMENTAL TRANSPORT
HEAT TRANSFER
MASS TRANSFER
MATHEMATICAL MODELS
METEOROLOGY
RUNOFF
SAMPLING
STATISTICAL MODELS
THERMODYNAMICS
WEATHER