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青藏高原及毗邻地区对流层顶变化分析

作者：李嘉鑫; 蒲晓明; 杜冠男
来源：气象灾害防御, 2023, 30(02): 39-43.

摘要

利用NCEP/NCAR数据以及欧洲中心（ECWMF）提供的ERA-Interim再分析数据分析1979—2016年青藏高原及毗邻地区对流层顶高度和气温的变化特征。结果表明：对流层顶气压具有明显的季节性变化，2月气压最高，对流层顶高度最低；7月达到最小值，对流层顶最高。对流层顶在青藏高原及毗邻地区等压线基本呈纬向分布，气压梯度在高原北部地区较大，南部较小，对流层顶高度由北向南逐渐升高。青藏高原及毗邻地区平均气压距平年际变化为减小趋势，对流层顶高度持续升高。对流层顶等温线呈纬向分布并伴有小波结构，纬向温度梯度变化明显，温度随纬度升高而升高，呈现南冷北暖的分布形势。等温线密集带夏季靠北，冬季靠南。对流层顶温度变化为降低趋势，变温趋势南北差异较明显，北边小，南边大。NCEP数据和ERA-Interim数据相比较，除对流层顶气压变化趋势外其他变化规律基本吻合。

  • 单位
    吉林省气候中心
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更新时间：2024-03-18 13:13
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