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A modelling investigation into lake-breeze development and convection triggering in the Nam Co Lake basin, Tibetan Plateau

Gerken, Tobias; Biermann, Tobias LU ; Babel, Wolfgang; Herzog, Michael; Ma, Yaoming; Foken, Thomas and Graf, Hans Fi (2013) In Theoretical and Applied Climatology 117(1). p.149-167
Abstract

This paper uses the cloud resolving Active Tracer High-resolution Atmospheric Model coupled to the interactive surface model Hybrid in order to investigate the diurnal development of a lake-breeze system at the Nam Co Lake on the Tibetan Plateau. Simulations with several background wind speeds are conducted, and the interaction of the lake breeze with topography and background wind in triggering moist and deep convection is studied. The model is able to adequately simulate the systems most important dynamical features such as turbulent surface fluxes and the development of a lake breeze for the different wind conditions. We identify two different mechanisms for convection triggering that are dependent on the direction of the background... (More)

This paper uses the cloud resolving Active Tracer High-resolution Atmospheric Model coupled to the interactive surface model Hybrid in order to investigate the diurnal development of a lake-breeze system at the Nam Co Lake on the Tibetan Plateau. Simulations with several background wind speeds are conducted, and the interaction of the lake breeze with topography and background wind in triggering moist and deep convection is studied. The model is able to adequately simulate the systems most important dynamical features such as turbulent surface fluxes and the development of a lake breeze for the different wind conditions. We identify two different mechanisms for convection triggering that are dependent on the direction of the background wind: triggering over topography, when the background wind and the lake breeze have the same flow direction, and triggering due to convergence between the lake-breeze front and the background wind. Our research also suggests that precipitation measurements at the centre of the basins on the Tibetan Plateau are not representative for the basin as a whole as precipitation is expected to occur mainly in the vicinity of the topography.

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author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Clouds, Surface-fluxes, Thermal circulation
in
Theoretical and Applied Climatology
volume
117
issue
1
pages
19 pages
publisher
Springer
external identifiers
  • scopus:84919390639
ISSN
0177-798X
DOI
10.1007/s00704-013-0987-9
language
English
LU publication?
no
id
f6d18f21-20a2-4c4f-a646-17477288c9e4
date added to LUP
2016-07-13 10:33:09
date last changed
2017-01-15 04:40:14
@article{f6d18f21-20a2-4c4f-a646-17477288c9e4,
  abstract     = {<p>This paper uses the cloud resolving Active Tracer High-resolution Atmospheric Model coupled to the interactive surface model Hybrid in order to investigate the diurnal development of a lake-breeze system at the Nam Co Lake on the Tibetan Plateau. Simulations with several background wind speeds are conducted, and the interaction of the lake breeze with topography and background wind in triggering moist and deep convection is studied. The model is able to adequately simulate the systems most important dynamical features such as turbulent surface fluxes and the development of a lake breeze for the different wind conditions. We identify two different mechanisms for convection triggering that are dependent on the direction of the background wind: triggering over topography, when the background wind and the lake breeze have the same flow direction, and triggering due to convergence between the lake-breeze front and the background wind. Our research also suggests that precipitation measurements at the centre of the basins on the Tibetan Plateau are not representative for the basin as a whole as precipitation is expected to occur mainly in the vicinity of the topography.</p>},
  author       = {Gerken, Tobias and Biermann, Tobias and Babel, Wolfgang and Herzog, Michael and Ma, Yaoming and Foken, Thomas and Graf, Hans Fi},
  issn         = {0177-798X},
  keyword      = {Clouds,Surface-fluxes,Thermal circulation},
  language     = {eng},
  month        = {08},
  number       = {1},
  pages        = {149--167},
  publisher    = {Springer},
  series       = {Theoretical and Applied Climatology},
  title        = {A modelling investigation into lake-breeze development and convection triggering in the Nam Co Lake basin, Tibetan Plateau},
  url          = {http://dx.doi.org/10.1007/s00704-013-0987-9},
  volume       = {117},
  year         = {2013},
}