Simulating Weather Events with a Linked Atmosphere-Hydrology Model
(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
- Pereira, Fábio Farias LU and Uvo, Cintia Bertacchi LU
- organization
- publishing date
- 2020-10-01
- 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}}, }