Influence on the temperature estimation of the planetary boundary layer scheme with different minimum eddy diffusivity in WRF v3.9.1.1
<p>The minimum eddy diffusivity (<span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span>) in the planetary boundary layer (PBL) scheme can influence the model performance when simulating meteorological parameters such as tem...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2021-10-01
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| Series: | Geoscientific Model Development |
| Online Access: | https://gmd.copernicus.org/articles/14/6135/2021/gmd-14-6135-2021.pdf |
| _version_ | 1819142000817995776 |
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| author | H. Ding L. Cao H. Jiang W. Jia W. Jia Y. Chen J. An |
| author_facet | H. Ding L. Cao H. Jiang W. Jia W. Jia Y. Chen J. An |
| author_sort | H. Ding |
| collection | DOAJ |
| description | <p>The minimum eddy diffusivity (<span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span>) in the planetary boundary layer (PBL) scheme can influence the model performance when simulating meteorological parameters such as temperature. However, detailed studies on the sensitivities of the simulated temperatures to the settings of <span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span> are still lacking. Thus, in this study we evaluated the performance of the ACM2 (Asymmetrical Convective Model version 2) scheme in the WRF (Weather Research and Forecasting) model with different <span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span> settings when simulating the spatiotemporal distribution of the temperature in the region of Beijing, China. Five constant values and a function were implemented in the model to calculate <span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span>, and the simulation results with different <span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span> settings were compared and analyzed.
The results show that the increase in <span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span> leads to an elevation of the 2 m temperature, especially at nighttime. We figured out that the deviation in the 2 m temperature at night is mainly caused by the different estimations of the turbulent mixing under stable conditions in simulation scenarios with different <span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span> settings. Moreover, the spatial distribution of the temperature deviation indicates that under various underlying surface categories, the change in <span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span> exerts a distinct influence on the prediction of the 2 m temperature. This influence was found to be stronger during the nighttime than during the daytime, in plain areas than in mountain areas, and in urban areas than in non-urban areas. During the night in the urban areas, the influence on the simulated 2 m temperature brought about by the change in <span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span> is the strongest. In addition, the model performance using a functional-type <span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span> in the ACM2 scheme for capturing the spatiotemporal distribution of the temperature in this region was also compared with that using a constant <span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span>.</p> |
| first_indexed | 2024-12-22T12:03:24Z |
| format | Article |
| id | doaj.art-8c0bdb29c35f4720b2ffc28210f2bd4d |
| institution | Directory Open Access Journal |
| issn | 1991-959X 1991-9603 |
| language | English |
| last_indexed | 2024-12-22T12:03:24Z |
| publishDate | 2021-10-01 |
| publisher | Copernicus Publications |
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| series | Geoscientific Model Development |
| spelling | doaj.art-8c0bdb29c35f4720b2ffc28210f2bd4d2022-12-21T18:26:30ZengCopernicus PublicationsGeoscientific Model Development1991-959X1991-96032021-10-01146135615310.5194/gmd-14-6135-2021Influence on the temperature estimation of the planetary boundary layer scheme with different minimum eddy diffusivity in WRF v3.9.1.1H. Ding0L. Cao1H. Jiang2W. Jia3W. Jia4Y. Chen5J. An6Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, ChinaKey Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, ChinaKey Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, ChinaKey Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, ChinaKey Laboratory of Atmospheric Chemistry of CMA, Chinese Academy of Meteorological Sciences, Beijing 100081, ChinaState Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, ChinaState Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China<p>The minimum eddy diffusivity (<span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span>) in the planetary boundary layer (PBL) scheme can influence the model performance when simulating meteorological parameters such as temperature. However, detailed studies on the sensitivities of the simulated temperatures to the settings of <span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span> are still lacking. Thus, in this study we evaluated the performance of the ACM2 (Asymmetrical Convective Model version 2) scheme in the WRF (Weather Research and Forecasting) model with different <span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span> settings when simulating the spatiotemporal distribution of the temperature in the region of Beijing, China. Five constant values and a function were implemented in the model to calculate <span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span>, and the simulation results with different <span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span> settings were compared and analyzed. The results show that the increase in <span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span> leads to an elevation of the 2 m temperature, especially at nighttime. We figured out that the deviation in the 2 m temperature at night is mainly caused by the different estimations of the turbulent mixing under stable conditions in simulation scenarios with different <span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span> settings. Moreover, the spatial distribution of the temperature deviation indicates that under various underlying surface categories, the change in <span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span> exerts a distinct influence on the prediction of the 2 m temperature. This influence was found to be stronger during the nighttime than during the daytime, in plain areas than in mountain areas, and in urban areas than in non-urban areas. During the night in the urban areas, the influence on the simulated 2 m temperature brought about by the change in <span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span> is the strongest. In addition, the model performance using a functional-type <span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span> in the ACM2 scheme for capturing the spatiotemporal distribution of the temperature in this region was also compared with that using a constant <span class="inline-formula"><i>K</i><sub><i>z</i>min</sub></span>.</p>https://gmd.copernicus.org/articles/14/6135/2021/gmd-14-6135-2021.pdf |
| spellingShingle | H. Ding L. Cao H. Jiang W. Jia W. Jia Y. Chen J. An Influence on the temperature estimation of the planetary boundary layer scheme with different minimum eddy diffusivity in WRF v3.9.1.1 Geoscientific Model Development |
| title | Influence on the temperature estimation of the planetary boundary layer scheme with different minimum eddy diffusivity in WRF v3.9.1.1 |
| title_full | Influence on the temperature estimation of the planetary boundary layer scheme with different minimum eddy diffusivity in WRF v3.9.1.1 |
| title_fullStr | Influence on the temperature estimation of the planetary boundary layer scheme with different minimum eddy diffusivity in WRF v3.9.1.1 |
| title_full_unstemmed | Influence on the temperature estimation of the planetary boundary layer scheme with different minimum eddy diffusivity in WRF v3.9.1.1 |
| title_short | Influence on the temperature estimation of the planetary boundary layer scheme with different minimum eddy diffusivity in WRF v3.9.1.1 |
| title_sort | influence on the temperature estimation of the planetary boundary layer scheme with different minimum eddy diffusivity in wrf v3 9 1 1 |
| url | https://gmd.copernicus.org/articles/14/6135/2021/gmd-14-6135-2021.pdf |
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