The influence of wind speed on surface layer stability and turbulent fluxes over southern Indian peninsula station

Surface to atmosphere exchange has received much attention in numerical weather prediction models. This exchange is defined by turbulent parameters such as frictional velocity, drag coefficient and heat fluxes, which have to be derived experimentally from high-frequency observations. High-frequency...

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Bibliographic Details
Published in:Journal of Earth System Science 2016-10, Vol.125 (7), p.1399-1411
Main Authors: Patil, M N, Waghmare, R T, Dharmaraj, T, Chinthalu, G R, Siingh, Devendraa, Meena, G S
Format: Article
Language:English
Subjects:
Aerosol interaction
Air temperature
Atmospheric boundary layer
Atmospheric models
Boundary layer
Boundary layers
Coefficient of variation
Drag
Drag coefficient
Drag coefficients
Earth and Environmental Science
Earth Sciences
Eddy covariance
Frequency
Frequency measurement
Frictional velocity
Ground stations
Ground-based observation
Heat flux
Heat transfer
Mixing ratio
Numerical prediction
Obukhov length
Parameters
Prediction models
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
Stability
Surface boundary layer
Surface chemistry
Surface layers
Surface stability
Turbulent flow
Turbulent fluxes
Velocity
Water vapor
Water vapour
Weather forecasting
Wind
Wind effects
Wind measurement
Wind speed
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Summary:Surface to atmosphere exchange has received much attention in numerical weather prediction models. This exchange is defined by turbulent parameters such as frictional velocity, drag coefficient and heat fluxes, which have to be derived experimentally from high-frequency observations. High-frequency measurements of wind speed, air temperature and water vapour mixing ratio (eddy covariance measurements), were made during the Integrated Ground Observation Campaign (IGOC) of Cloud Aerosol Interaction and Precipitation Enhancement Experiment (CAIPEEX) at Mahabubnagar, India (16 ∘ 44 ′ N, 77 ∘ 59 ′ E) in the south-west monsoon season. Using these observations, an attempt was made to investigate the behaviour of the turbulent parameters, mentioned above, with respect to wind speed. We found that the surface layer stability derived from the Monin–Obukhov length scale, is well depicted by the magnitude of wind speed, i.e., the atmospheric boundary layer was under unstable regime for wind speeds >4 m s −1 ; under stable regime for wind speeds
ISSN:0253-4126
0973-774X
DOI:10.1007/s12040-016-0735-5