Recent studies emphasize the significance of precipitation characteristics at intraseasonal time scales for better predicting the monsoonal rainfall. In this connection, to understand the differences in characteristics of the vertical structure of precipitation during wet and dry spells over the Arabian Sea (AS) and Bay of Bengal (BOB) from the southwest monsoon (SWM) to northeast monsoon (NEM) using 16 years of tropical rainfall measuring mission (TRMM) version#7 datasets. On average, the wet and dry spells durations are more during NEM (> 5 days) than SWM (4 days) over BOB, while the durations are identical (5 days) in all spells over AS. Irrespective of the season, shallow systems' occurrence and rain fraction are more in dry spells than the respective wet spells over AS and BOB. During the dry spells of BOB, both rain fraction and occurrence of stratiform and convective rain decreases while shallow rain increases from SWM to NEM. The increase in shallow systems occurrence results bimodal distribution (3 and 5.5 km) in storm height and reflectivity distributions. During wet spells, for different rain types, the occurrence and rain fraction changes are minimal in both seasons and seas. The prevalence of deeper systems than shallow systems is due to changes in atmospheric background conditions from dry to wet spells. The latent heating distributions are broader during SWM than NEM in both spells of two seas. The observed bimodal distribution of latent heating profiles in the dry spells during SWM and NEM over AS, and only during NEM over BOB results from a higher occurrence of shallow rain in these spells.

最近的研究强调了季节内时间尺度的降水特征对于更好地预测季风降雨的重要性。在这方面，为了了解阿拉伯海 (AS) 和孟加拉湾 (BOB) 从西南季风 (SWM) 到东北季风 (NEM) 的干湿期降水垂直结构特征的差异，使用 16多年热带降雨测量任务 (TRMM) 版本#7 数据集。平均而言，NEM 期间（> 5 天）的干湿期持续时间比 BOB 的 SWM（4 天）更长，而 AS 的所有期的持续时间相同（5 天）。与季节无关，AS 和 BOB 上浅层系统的发生率和降雨量在干旱期多于相应的湿润期。在 BOB 的干旱期，从 SWM 到 NEM，降雨量和层状雨和对流雨的发生率均减少，而浅雨增加。浅层系统出现的增加导致风暴高度和反射率分布的双峰分布（3 和 5.5 公里）。在雨季期间，对于不同的降雨类型，季节和海洋中的发生率和降雨量变化都是最小的。较浅系统更深系统的普遍性是由于大气背景条件从干到湿的变化。SWM期间的潜热分布比两个海域的NEM更广泛。在 SWM 和 NEM 期间在 AS 上观察到的潜在加热剖面的双峰分布，以及仅在 BOB 上的 NEM 期间，是由于这些期间浅雨的发生率较高。