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An Analysis of Tropical Cold-Point Tropopause Warming in 1999

机译：1999年热带冷点对摩托车热变暖分析

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摘要

Using reanalysis datasets, the warming of the tropical tropopause in 1999 and its evolution are investigated. It is found that there is a strong rate of increase in tropical cold-point tropopause temperature (CPTT) in June 1999, with negative CPTT anomalies before June (March-April-May) and large positive anomalies after June (July-August-September).Multiple linear regression analysis shows that deep convection, the quasi-biennial oscillation (QBO), and tropical upwelling associated with the Brewer-Dobson circulation (BDC) largely explain the variations of CPTT in 1999. Before June, enhanced deep convection resulting from increased sea surface temperature (SST) over the western Pacific and enhanced tropical upwelling of the BDC lead to a higher and colder tropopause. Those two factors explain 22% and 17% of the variance in CPTT, respectively. In June, the transformation of the east phase of QBO to the west phase contributes up tomore than 50%of the variance in CPTT changes. After June, reduced tropical upwelling induced by weakened wave activity results in the warmer tropical tropopause temperatures to a large extent.
机译：使用Reanalysicate Datasets，对1999年的热带对象的热身及其演变进行了调查。有人发现，1999年6月，热带冷点对流度温度（CPTT）存在强劲的增加率，在6月（5月至5月至5月至5月至5月至5月）之前，负CPTT异常（7月至8月至9月） ）。多次线性回归分析表明，与Brewer-Dobson循环（BDC）相关的深度对流，准两年期振荡（QBO）和热带上升率在很大程度上解释了1999年CPTT的变化。在六月之前，增加了深入的对流在西太平洋的海面温度（SST）增加，增强了BDC的热带上升，导致了更高且较冷的对象流程。这两个因素分别解释了CPTT的22％和17％的差异。 6月，QBO东阶段转变为西阶段的转变贡献了大约50％的CPTT变化方差的50％。 6月后，通过弱化波浪活性引起的热带上升量导致热带热带热带温度的热带热带温度在很大程度上。

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  • 来源
    《Advances in Meteorology》 |2017年第1期|共11页
  • 作者

    Yuanyuan Han; Fei Xie; Shiyan Zhang; Ruhua Zhang; Feiyang Wang; Jiankai Zhang;

  • 作者单位

    Key Laboratory for Semi-Arid Climate Change of the Ministry of Education College of Atmospheric Sciences Lanzhou University Lanzhou China;

    State Key Laboratory of Earth Surface Processes and Resource Ecology and College of Global Change and Earth System Science Beijing Normal University Beijing China;

    Key Laboratory for Semi-Arid Climate Change of the Ministry of Education College of Atmospheric Sciences Lanzhou University Lanzhou China;

    Key Laboratory for Semi-Arid Climate Change of the Ministry of Education College of Atmospheric Sciences Lanzhou University Lanzhou China;

    Key Laboratory for Semi-Arid Climate Change of the Ministry of Education College of Atmospheric Sciences Lanzhou University Lanzhou China;

    Key Laboratory for Semi-Arid Climate Change of the Ministry of Education College of Atmospheric Sciences Lanzhou University Lanzhou China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 大气科学（气象学）;
  • 关键词

    Tropical Cold-Point; Tropopause Warming; tropical cold-point tropopause temperature (CPTT);

    机译：热带冷点;对象般的变暖;热带冷点对流度温度（CPTT）;

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