Near Ground Wind Simulations by a Meso-Scale Atmospherical Model for the Extremely Large Telescopes Site Selection
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidad Nacional Autónoma de México
2003
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| _version_ | 1876452416938835968 |
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| author | E. Masciadri |
| author_facet | E. Masciadri |
| contents | Near Ground Wind Simulations by a Meso-Scale Atmospherical Model for the Extremely Large Telescopes Site Selection E. Masciadri Física, Astronomía y Matemáticas SITE TESTING METHODS: NUMERICAL ATMOSPHERIC EFFECTS Currently, many Extremely Large Telescopes (ELTs: [30 100] m size)projects exist. Because of the huge size of such instruments, the selection of anoptimal site having a low wind intensity at ground level is a fundamental priorityto assure the telescope stability. Wind intensity estimations provided by the generalcirculation models of the meteorological world centres (such as the ECMWF)are not reliable, because of their low horizontal resolution (2 -2:5). In this paperwe test the ability of a non-hydrostatic meso-scale model (Meso-Nh), havinga horizontal resolution of 1 km, in reconstructing the near ground wind intensity(NGW) measured at Paranal, Chile and Maidanak, Uzbekistan, and the abilityof the model to discriminate between the two sites. Measurements of the NGWtaken during some years at the two sites show a typical wind speed difference of4 - 5 m/s. In this paper, NGW measurements from 20 - 25 nights at each siteare compared with simulations and a statistic analysis is made. Our conclusion isthat the Meso-Nh model can discriminate between the two sites. On the contrary,the analyses and/or forecasts provided by the general circulation models cannot.The limitations of this study are discussed, and some procedures to by-pass theselimitations are suggested. 2003 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57139210 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Num.2 Vol.39 |
| format | Artículo científico |
| id | redalyc_57139210 |
| institution | Redalyc |
| language | en |
| publishDate | 2003 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Near Ground Wind Simulations by a Meso-Scale Atmospherical Model for the Extremely Large Telescopes Site Selection E. Masciadri Física, Astronomía y Matemáticas SITE TESTING METHODS: NUMERICAL ATMOSPHERIC EFFECTS Near Ground Wind Simulations by a Meso-Scale Atmospherical Model for the Extremely Large Telescopes Site Selection E. Masciadri Física, Astronomía y Matemáticas SITE TESTING METHODS: NUMERICAL ATMOSPHERIC EFFECTS Currently, many Extremely Large Telescopes (ELTs: [30 100] m size)projects exist. Because of the huge size of such instruments, the selection of anoptimal site having a low wind intensity at ground level is a fundamental priorityto assure the telescope stability. Wind intensity estimations provided by the generalcirculation models of the meteorological world centres (such as the ECMWF)are not reliable, because of their low horizontal resolution (2 -2:5). In this paperwe test the ability of a non-hydrostatic meso-scale model (Meso-Nh), havinga horizontal resolution of 1 km, in reconstructing the near ground wind intensity(NGW) measured at Paranal, Chile and Maidanak, Uzbekistan, and the abilityof the model to discriminate between the two sites. Measurements of the NGWtaken during some years at the two sites show a typical wind speed difference of4 - 5 m/s. In this paper, NGW measurements from 20 - 25 nights at each siteare compared with simulations and a statistic analysis is made. Our conclusion isthat the Meso-Nh model can discriminate between the two sites. On the contrary,the analyses and/or forecasts provided by the general circulation models cannot.The limitations of this study are discussed, and some procedures to by-pass theselimitations are suggested. 2003 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57139210 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Num.2 Vol.39 |
| title | Near Ground Wind Simulations by a Meso-Scale Atmospherical Model for the Extremely Large Telescopes Site Selection |
| topic | Física, Astronomía y Matemáticas SITE TESTING METHODS: NUMERICAL ATMOSPHERIC EFFECTS |
| url | https://www.redalyc.org/articulo.oa?id=57139210 |