Using NOAA AVHRR and SPOT VGT data to estimate surface parameters: application to a mesoscale meteorological model

Using NOAA AVHRR and SPOT VGT data to estimate surface parameters: application to a mesoscale meteorological model
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使用 NOAA AVHRR 和 SPOT VGT 数据估计表面参数:在中尺度气象模型中的应用

DOI:
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发表时间:
2004
期刊:
影响因子:
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通讯作者:
J. Baldasano
J. Baldasano
中科院分区:
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文献类型:
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作者:
Nicolau Pineda;O. Jorba;J. Jorge;J. Baldasano

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中尺度数值天气预报模式MM5是宾夕法尼亚州立大学/NCAR第五代中尺度模式,它利用全球土地利用图设置地表特征的物理参数来模拟土壤-大气过程。这些参数包括反照率、发射率、热惯性、粗糙度长度和土壤湿度。根据2000年AVHRR数据集,对伊比利亚半岛东北部的土壤参数进行了新的估计。MM5通过一个新的土地利用图,即最近的NATLAN 2000-CORINE土地利用图,引入新的数值,以便纳入过去十年的土地覆盖变化。利用原始土地利用图和CORINE土地利用图对模型进行了测试,以评估模型对土地利用变化和新的土壤物理参数定义的敏感性。结果表明,在风场或上升气流运动等一些气象变量上存在明显的局部差异,但与地面测量结果的比较并未导致模式总体性能的明显改善。
The mesoscale numerical weather prediction model MM5, the 5th generation Pennsylvania State University/NCAR Mesoscale Model, uses a global land-use map to set the physical parameters on the surface characteristics to model the soil-atmosphere processes. These parameters are albedo, emissivity, thermal inertia, roughness length and soil moisture. A new estimation of soil parameters is done for the north-east of the Iberian Peninsula from an AVHRR data set of year 2000. The new values are introduced into MM5 via a new land-use map, the recent NATLAN 2000-CORINE land-use map, in order to incorporate the last decade land-cover changes. The model is tested with the original and the CORINE land-use map to evaluate the sensitivity to land-use changes and new physical soil parameters definition. Results show clear local differences in some meteorological variables as wind fields or updraft movements, but comparisons with ground measurements do not lead to a clear improvement in the model general performance.