Basic Equations for Flux-Profile Relationships Wind Profile:
• Surface-layer parameters crucial for calculating fluxes of momentum, heat and water vapor in the atmospheric boundary layer (ABL) are derived from vertical profiles of wind velocity, temperature and humidity for the ARM North Slope of Alaska (NSA) site in Barrow. • Parameters include the friction...
| Main Authors: | , , |
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.650.8133 http://www.arm.gov/publications/proceedings/conf18/poster/P00148.pdf |
| Summary: | • Surface-layer parameters crucial for calculating fluxes of momentum, heat and water vapor in the atmospheric boundary layer (ABL) are derived from vertical profiles of wind velocity, temperature and humidity for the ARM North Slope of Alaska (NSA) site in Barrow. • Parameters include the friction velocity (u∗), the temperature (Θ∗) and humidity scales (q∗), the roughness length (zο), and the zero-displacement (d). • Surface and meteorological tower measurements from instrumentation with sensors at 2, 10, 20 and 40 meters are used for derivation of turbulent fluxes by means of statistical methods. • Seasonal changes of surface layer parameters result from different thermal stratification of the ABL. These changes have been partly neglected in the past causing inaccurate formulation of vertical fluxes. • Fluxes of heat and momentum are compared with data from Weather Research Forecast (WRF) model runs. Discrepancies in derived fluxes have the potential to serve for improved model parameterization and better understanding of ABL fluxes at this site in the future. 2 |
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