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青藏高原大地形高度变化对东亚地区定常扰动能源转换的影响
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国家自然科学基金项目41875056、41665005、41765003


Effect of Tibetan Plateau Orography Height Change on Stationary Disturbance Energy Conversion in East Asia
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    摘要:

    利用CAM3(Community Atmosphere Model version 3)模式和ERA-Interim再分析数据研究了对流层中青藏高原大地形对东亚地区定常扰动能量源的影响。在冬季对流层中东亚地区的定常扰动的能量源地主要有两个,分别是高原北部的东亚地区和高原下游的西太平洋地区。高原高度增加时,对流层整层东亚地区斜压发展随高原高度增高而减弱,西太平洋地区斜压发展增强。定常扰动的正压发展与斜压发展的位置相似,但是明显的要比定常扰动的斜压发展弱。随着高原高度升高,在对流层中高原北部的东亚地区正压发展先减弱后增强,而在高原下游的西太平洋地区随高原高度增高正压发展一直增强。在冬季对流层中定常扰动的总能量发展与定常扰动的斜压发展一致,这样的发展趋势说明了冬季东亚地区和西太平洋地区定常扰动在对流层中的能量发展主要是斜压性引起的。

    Abstract:

    Using the National Center for Atmospheric Research Community Atmosphere Model version 3 (CAM3) outputs and European Centre for Medium-Range Weather Forecasts Interim Reanalysis (ERA-Interim) data, the role of the orography of the Tibetan and Iranian Plateaus in modulating the sources of stationary wave energy is investigated in this study. The sources of stationary wave energy in the troposphere during winter are located in two areas, i.e., East Asia north of the plateau and western Pacific downstream of the plateau. When orographic uplift occurs, the baroclinic development weakens over East Asia north of the plateau and enhances over western Pacific downstream of the plateau in the troposphere. The location of the barotropic development of stationary wave energy is similar to that of baroclinic development. Meanwhile, the intensity of the barotropic development of stationary wave energy is weaker than that of baroclinic development in the troposphere. When orographic height uplift occurs, the barotropic development of stationary wave energy first weakens and then enhances over East Asia north of the plateau, whereas it enhances over Western Pacific downstream of the plateau in the troposphere. In the troposphere during winter, the total stationary wave energy development is consistent with the baroclinic development of stationary wave energy, which indicates that the baroclinic development of stationary wave energy plays an important role in the development of stationary wave.

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左群杰,张万诚,高守亭.2020.青藏高原大地形高度变化对东亚地区定常扰动能源转换的影响[J].气候与环境研究,25(4):345-352. ZUO Qunjie, ZHANG Wancheng, GAO Shouting.2020.Effect of Tibetan Plateau Orography Height Change on Stationary Disturbance Energy Conversion in East Asia[J].Climatic and Environmental Research (in Chinese],25(4):345-352.

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  • 收稿日期:2019-03-28
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  • 在线发布日期: 2020-07-28
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