Recent variability of sub‐seasonal monsoon precipitation and its potential drivers in Myanmar using in‐situ observation during 1981–2020. (28th October 2021)

• Record Type: Journal Article
• Authors: Sein, Zin Mie Mie; Zhi, Xiefei; Ullah, Irfan; Azam, Kamran; Ngoma, Hamida; Saleem, Farhan; Xing, Yun; Iyakaremye, Vedaste; Syed, Sidra; Hina, Saadia; Nkunzimana, Athanase
• Is Part Of: International journal of climatology. Volume 42:Number 6(2022)
• Page Start: 3341
• Page End: 3359
• Publication Date: 2021-10-28
• Subjects: Mann–Kendall (MK) test -- Myanmar -- precipitation -- summer monsoon; Climatology -- Periodicals; Climat -- Périodiques; Climatologie -- Périodiques; 551.605
• DOI: 10.1002/joc.7419
• Languages: English
• ISSNs: 0899-8418

Abstract

Abstract: The present study assessed the spatiotemporal variation of summer monsoon precipitation and its potential drivers in Myanmar, utilizing monthly precipitation data from forty‐six (46) synoptic meteorological stations spanning 1981–2020. The nonparametric statistical Mann–Kendall (MK), Sequential Mann–Kendall (SQMK) test, Empirical Orthogonal Function (EOF), and Probability Distribution Function (PDF) were used to determine the spatiotemporal monsoon precipitation trends and variability over the study period. The results show that higher precipitation occurs during June, July and August (peak monsoon period), while low precipitation was detected in May (onset month), September and October (withdrawal monsoon period), respectively. Moreover, abrupt change in precipitation is observed after 1990 with a significant (95% confidence level) increasing trend from 2000 to 2020. Decadal precipitation experienced the highest fluctuation during 2011–2020, a positive shift and increased frequency in recent decades. The spatial trends for monthly and seasonal precipitation vary from station to station and region to region due to a fluctuated shift of climatic dynamics. During dry conditions, less cloud liquid water suppressed relative humidity and high air temperature were exhibited, thus implying less precipitation in the region. However, the wet years revealed strong moisture/water vapour into the inland regions from the ocean, increased relative humidity, and suppressed air temperature. In addition, no significant relationship was found between El‐Nino Southern Oscillation (ENSO), Indian Ocean Dipole (IOD), and monsoon onset timing with precipitation variability over Myanmar. This study provides essential information on manageable climate adaptation, mitigation and weather forecasting strategies in Myanmar. Abstract : Map of study area showing elevation (m) and meteorological stations used in the study; inset is the country's location in South East Asia.