Impact of Canopy Representations on Regional Modeling of Evapotranspiration using the WRF-ACASA Coupled Model
In this study, we couple the Weather Research and Forecasting Model (WRF) with the Advanced Canopy-Atmosphere-Soil Algorithm (ACASA), a high complexity land surface model, to investigate the impact of canopy representation on regional evapotranspiration. The WRF-ACASA model uses a multilayer structu...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | en_US |
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Elsevier BV
2020
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| Online Access: | https://hdl.handle.net/1721.1/124008 |
| _version_ | 1811084782935736320 |
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| author | Monier, Liyi Xu Pyles, Rex David Paw U, Kyaw Tha Snyder, Richard Monier, Erwan Falk, Matthias Chen, Shu-Hua |
| author2 | Massachusetts Institute of Technology. Joint Program on the Science & Policy of Global Change |
| author_facet | Massachusetts Institute of Technology. Joint Program on the Science & Policy of Global Change Monier, Liyi Xu Pyles, Rex David Paw U, Kyaw Tha Snyder, Richard Monier, Erwan Falk, Matthias Chen, Shu-Hua |
| author_sort | Monier, Liyi Xu |
| collection | MIT |
| description | In this study, we couple the Weather Research and Forecasting Model (WRF) with the Advanced Canopy-Atmosphere-Soil Algorithm (ACASA), a high complexity land surface model, to investigate the impact of canopy representation on regional evapotranspiration. The WRF-ACASA model uses a multilayer structure to represent the canopy, consequently allowing microenvironmental variables such as leaf area index (LAI), air and canopy temperature, wind speed and humidity to vary both horizontally and vertically. The improvement in canopy representation and canopy-atmosphere interaction allow for more realistic simulation of evapotranspiration on both regional and local scales. The coupled WRF-ACASA model is compared with the widely used intermediate complexity Noah land surface model in WRF (WRF-Noah) for both potential (ETo) and actual evapotranspiration (ETa). Two LAI datasets (USGS and MODIS) are used to study the model responses to surface conditions. Model evaluations over a diverse surface stations from the CIMIS and AmeriFlux networks show that an increase surface representations increase the model accuracy in ETa more so than ETo. Overall, while the high complexity of WRF-ACASA increases the realism of plant physiological processes, the model sensitivity to surface representation in input data such as LAI also increases. Keywords: Land surface modeling; WRF; Canopy representation; Regional modeling; Reference evapotranspiration; Actual evapotranspiration |
| first_indexed | 2024-09-23T12:57:31Z |
| format | Article |
| id | mit-1721.1/124008 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T12:57:31Z |
| publishDate | 2020 |
| publisher | Elsevier BV |
| record_format | dspace |
| spelling | mit-1721.1/1240082022-09-28T11:10:04Z Impact of Canopy Representations on Regional Modeling of Evapotranspiration using the WRF-ACASA Coupled Model Impact of canopy representations on regional modeling of evapotranspiration using the WRF-ACASA coupled model Monier, Liyi Xu Pyles, Rex David Paw U, Kyaw Tha Snyder, Richard Monier, Erwan Falk, Matthias Chen, Shu-Hua Massachusetts Institute of Technology. Joint Program on the Science & Policy of Global Change Liyi Xu In this study, we couple the Weather Research and Forecasting Model (WRF) with the Advanced Canopy-Atmosphere-Soil Algorithm (ACASA), a high complexity land surface model, to investigate the impact of canopy representation on regional evapotranspiration. The WRF-ACASA model uses a multilayer structure to represent the canopy, consequently allowing microenvironmental variables such as leaf area index (LAI), air and canopy temperature, wind speed and humidity to vary both horizontally and vertically. The improvement in canopy representation and canopy-atmosphere interaction allow for more realistic simulation of evapotranspiration on both regional and local scales. The coupled WRF-ACASA model is compared with the widely used intermediate complexity Noah land surface model in WRF (WRF-Noah) for both potential (ETo) and actual evapotranspiration (ETa). Two LAI datasets (USGS and MODIS) are used to study the model responses to surface conditions. Model evaluations over a diverse surface stations from the CIMIS and AmeriFlux networks show that an increase surface representations increase the model accuracy in ETa more so than ETo. Overall, while the high complexity of WRF-ACASA increases the realism of plant physiological processes, the model sensitivity to surface representation in input data such as LAI also increases. Keywords: Land surface modeling; WRF; Canopy representation; Regional modeling; Reference evapotranspiration; Actual evapotranspiration National Science Foundation (U.S.) (Award ATM-0619139 and EF-1137306) 2020-03-04T19:51:39Z 2020-03-04T19:51:39Z 2017-08 2017-06 Article http://purl.org/eprint/type/JournalArticle 0168-1923 https://hdl.handle.net/1721.1/124008 Xu, Liyi et al. "Impact of canopy representations on regional modeling of evapotranspiration using the WRF-ACASA coupled model." Agricultural and Forest Meteorology, 247 (December 2017): 79-92. en_US https://doi.org/10.1016/j.agrformet.2017.07.003 Agricultural and Forest Meteorology Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Elsevier BV Liyi Xu |
| spellingShingle | Monier, Liyi Xu Pyles, Rex David Paw U, Kyaw Tha Snyder, Richard Monier, Erwan Falk, Matthias Chen, Shu-Hua Impact of Canopy Representations on Regional Modeling of Evapotranspiration using the WRF-ACASA Coupled Model |
| title | Impact of Canopy Representations on Regional Modeling of Evapotranspiration using the WRF-ACASA Coupled Model |
| title_full | Impact of Canopy Representations on Regional Modeling of Evapotranspiration using the WRF-ACASA Coupled Model |
| title_fullStr | Impact of Canopy Representations on Regional Modeling of Evapotranspiration using the WRF-ACASA Coupled Model |
| title_full_unstemmed | Impact of Canopy Representations on Regional Modeling of Evapotranspiration using the WRF-ACASA Coupled Model |
| title_short | Impact of Canopy Representations on Regional Modeling of Evapotranspiration using the WRF-ACASA Coupled Model |
| title_sort | impact of canopy representations on regional modeling of evapotranspiration using the wrf acasa coupled model |
| url | https://hdl.handle.net/1721.1/124008 |
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