This paper presents the first quantitative relationship between the cold point tropopause (CPT) and tropical easterly jet (TEJ) using radiosonde observations over Gadanki (13.45° N, 79.2° E) during the Indian summer monsoon season 2006–2014. CPT and TEJ peak altitudes () show amalgams of two categories of variability on the day‐to‐day scale. In category1 occurs close to and they show in‐phase variation. While in Category2 occurs far apart from and they do not show any relationship. For Category1 and are strongly correlated (0.70), as well as and (CPT temperature) are moderately anticorrelated (−0.55) significant at a 95% confidence level, indicating the dominance of adiabatic processes. Whereas in Category2 and are not significantly anti‐correlated. Thus, when TEJ and CPT are close to each other, it may serve as an indicator for the prevalence of the synoptic‐scale effect.

中文翻译：

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印度季风区热带对流层顶与热带东急流之间关系的观测证据

本文利用 2006-2014 年印度夏季季风季节期间 Gadanki（北纬 13.45°，东经 79.2°）无线电探空仪观测，首次提出了冷点对流层顶（CPT）和热带东急流（TEJ）之间的定量关系。CPT 和 TEJ 峰值海拔 () 显示了日常尺度上两类变化的混合体。在类别 1 中，它们接近并且显示出同相变化。而在 Category2 中，它们的出现相距甚远，并且没有表现出任何关系。对于类别 1， 和 具有强相关性 (0.70)，并且 和 (CPT 温度) 在 95% 置信水平下呈中度反相关 (-0.55)，表明绝热过程占主导地位。而在类别 2 中 和 不显着反相关。因此，当 TEJ 和 CPT 彼此接近时，它可以作为天气尺度效应普遍程度的指标。