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Simulating Weather Events with a Linked Atmosphere-Hydrology Model

Pereira, Fábio Farias LU and Uvo, Cintia Bertacchi LU orcid (2020) In Revista Brasileira de Meteorologia 35(4). p.703-715
Abstract

This study aims at assess the importance of a conceptual representation of hydrological processes when modelling atmospheric circulation. It compares results from a regional atmospheric model that interprets land surface hydrological processes based on parameterizations with results from a two-way coupled atmosphere-hydrological model that has a process-based approach to the land surface hydrological cycle. These numerical models were applied to a region cove-ring the Rio Grande basin, Brazil. The same input data, initial and boundary conditions were used on a 31-day simulation period. Results obtained from these simulations were compared to visible satellite images and gauging rainfall stations for three case studies that included a... (More)

This study aims at assess the importance of a conceptual representation of hydrological processes when modelling atmospheric circulation. It compares results from a regional atmospheric model that interprets land surface hydrological processes based on parameterizations with results from a two-way coupled atmosphere-hydrological model that has a process-based approach to the land surface hydrological cycle. These numerical models were applied to a region cove-ring the Rio Grande basin, Brazil. The same input data, initial and boundary conditions were used on a 31-day simulation period. Results obtained from these simulations were compared to visible satellite images and gauging rainfall stations for three case studies that included a cold front, deep convective clouds and stable atmospheric conditions. Both models could reproduce regional patterns of air circulation and rainfall influenced by the orography of the basin. How-ever, atmospheric processes driven by spatial gradients of land surface temperature or local surface heating were spatially better represented by the atmospheric-hydrological modelling system rather than the regional atmospheric model. Since areas characterized by spatial gradients of land surface temperature and local surface heating were closely associated with convergent air flows near land surface and strong vertical motion in the mid troposphere, this finding enhanced the role of a good representation of land surface hydrological processes for a better modelling the atmospheric dynamics.

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author
and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Atmosphere-hydrology models, Earth surface dynamics, Land surface modeling, Weather events
in
Revista Brasileira de Meteorologia
volume
35
issue
4
pages
13 pages
publisher
Sociedade Brasileira de Meteorologia
external identifiers
  • scopus:85097682376
ISSN
0102-7786
DOI
10.1590/0102-77863540077
language
English
LU publication?
yes
id
4947b9d6-7164-4c58-bc48-92b87432651e
date added to LUP
2020-12-28 05:14:31
date last changed
2022-04-19 03:06:50
@article{4947b9d6-7164-4c58-bc48-92b87432651e,
  abstract     = {{<p>This study aims at assess the importance of a conceptual representation of hydrological processes when modelling atmospheric circulation. It compares results from a regional atmospheric model that interprets land surface hydrological processes based on parameterizations with results from a two-way coupled atmosphere-hydrological model that has a process-based approach to the land surface hydrological cycle. These numerical models were applied to a region cove-ring the Rio Grande basin, Brazil. The same input data, initial and boundary conditions were used on a 31-day simulation period. Results obtained from these simulations were compared to visible satellite images and gauging rainfall stations for three case studies that included a cold front, deep convective clouds and stable atmospheric conditions. Both models could reproduce regional patterns of air circulation and rainfall influenced by the orography of the basin. How-ever, atmospheric processes driven by spatial gradients of land surface temperature or local surface heating were spatially better represented by the atmospheric-hydrological modelling system rather than the regional atmospheric model. Since areas characterized by spatial gradients of land surface temperature and local surface heating were closely associated with convergent air flows near land surface and strong vertical motion in the mid troposphere, this finding enhanced the role of a good representation of land surface hydrological processes for a better modelling the atmospheric dynamics.</p>}},
  author       = {{Pereira, Fábio Farias and Uvo, Cintia Bertacchi}},
  issn         = {{0102-7786}},
  keywords     = {{Atmosphere-hydrology models; Earth surface dynamics; Land surface modeling; Weather events}},
  language     = {{eng}},
  month        = {{10}},
  number       = {{4}},
  pages        = {{703--715}},
  publisher    = {{Sociedade Brasileira de Meteorologia}},
  series       = {{Revista Brasileira de Meteorologia}},
  title        = {{Simulating Weather Events with a Linked Atmosphere-Hydrology Model}},
  url          = {{http://dx.doi.org/10.1590/0102-77863540077}},
  doi          = {{10.1590/0102-77863540077}},
  volume       = {{35}},
  year         = {{2020}},
}