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

Content Provider	Springer Nature Link
Author	Patil, M N Waghmare, R T Chinthalu, G R Siingh, Devendraa Meena, G S
Copyright Year	2016
Abstract	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}$; under stable regime for wind speeds <2 m s$^{−1}$ and under neutral regime for wind speeds in the range of 2–3 m s$^{−1}$. All the three stability regimes were mixed for wind speeds 3–4 m s$^{−1}$. The drag coefficient shows scatter variation with wind speed in stable as well as unstable conditions.
Starting Page	1399
Ending Page	1411
Page Count	13
File Format	PDF
ISSN	02534126
Journal	Journal of Earth System Science
Volume Number	125
Issue Number	7
e-ISSN	0973774X
Language	English
Publisher	Springer India
Publisher Date	2016-09-10
Publisher Institution	Indian Academy of Sciences
Publisher Place	New Delhi
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Drag coefficient frictional velocity latent heat flux sensible heat flux stability eddy covariance. Earth Sciences Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics)
Content Type	Text
Resource Type	Article
Subject	1900/1901

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