The dependence of Indian winter precipitation extreme on the North Atlantic Oscillation

被引:0
|
作者
Midhuna Thayyil Mandodi
D. R. Pattanaik
机构
[1] India Meteorological Department,
来源
Natural Hazards | 2023年 / 117卷
关键词
North Atlantic Oscillation; Western disturbances; Subtropical westerly jet; Extreme rainfall;
D O I
暂无
中图分类号
学科分类号
摘要
Teleconnection patterns that span long spatial distances influence extreme rainfall events over a region. Therefore, comprehending  these atmospheric patterns and their underlying mechanism is crucial for weather forecasting and for predicting extreme rainfall events. The study of extreme precipitation events over north India, during the winter season, is crucial, as the region’s agriculture heavily depends on winter precipitation. The present study analyses the extreme rainfall days over north India during the winter season, and its association between different phases of North Atlantic Oscillation (NAO). Daily NAO index data from 1950 to 2020 are used in this study to determine the number of positive/negative NAO days. Ninety-five percentile thresholds of precipitation criteria are used to identify extreme rainfall events over states of Punjab, Himachal Pradesh, and Uttarakhand. India Meteorological Department gridded rainfall data at 0.25° resolution is used in this study. Although the 95-percentile threshold is highest over Himachal Pradesh (HP), the number of extreme rainfall days in HP is less than Uttarakhand and Punjab during the study period. A significant positive correlation is found between the number of positive NAO days and the number of extreme rainfall days for all these states in winter season. Further, the frequency of extreme rainfall events during positive NAO phase is almost twice than the negative NAO phase over all these states. The meteorological conditions during extreme rainfall events are analysed separately for both, positive and negative NAO days. It is noted that the subtropical westerly jet streams and Rossby waves play a significant role in the precipitation associated with extreme rainfall events. The path of westerlies and Rossby waves is different in two phases of NAO. Added moisture transport from the Arabian Sea raises the likelihood of extreme precipitation days during the positive NAO phase. During the positive NAO phase, the atmospheric conditions are more favourable for many extreme rainfall days.
引用
收藏
页码:1869 / 1885
页数:16
相关论文
共 50 条
  • [1] The dependence of Indian winter precipitation extreme on the North Atlantic Oscillation
    Mandodi, Midhuna Thayyil
    Pattanaik, D. R.
    [J]. NATURAL HAZARDS, 2023, 117 (02) : 1869 - 1885
  • [2] THE NORTH ATLANTIC OSCILLATION AND WINTER PRECIPITATION TOTALS IN SLOVAKIA
    Labudova, Livia
    Stastny, Pavel
    Trizna, Milan
    [J]. MORAVIAN GEOGRAPHICAL REPORTS, 2013, 21 (04) : 38 - 49
  • [3] North Atlantic Oscillation influence and weather types associated with winter total and extreme precipitation events in Spain
    Queralt, S.
    Hernandez, E.
    Barriopedro, D.
    Gallego, D.
    Ribera, P.
    Casanova, C.
    [J]. ATMOSPHERIC RESEARCH, 2009, 94 (04) : 675 - 683
  • [4] The Role of the North Atlantic Oscillation for Projections of Winter Mean Precipitation in Europe
    McKenna, C. M.
    Maycock, A. C.
    [J]. GEOPHYSICAL RESEARCH LETTERS, 2022, 49 (19)
  • [5] Interannual linkage between Arctic/North Atlantic Oscillation and tropical Indian Ocean precipitation during boreal winter
    Dao-Yi Gong
    Yongqi Gao
    Dong Guo
    Rui Mao
    Jing Yang
    Miao Hu
    Miaoni Gao
    [J]. Climate Dynamics, 2014, 42 : 1007 - 1027
  • [6] Interannual linkage between Arctic/North Atlantic Oscillation and tropical Indian Ocean precipitation during boreal winter
    Gong, Dao-Yi
    Gao, Yongqi
    Guo, Dong
    Mao, Rui
    Yang, Jing
    Hu, Miao
    Gao, Miaoni
    [J]. CLIMATE DYNAMICS, 2014, 42 (3-4) : 1007 - 1027
  • [7] Atlantic Multidecadal Oscillation modulates the relationship between North Pacific Oscillation and winter precipitation in North China Plain
    Zheng, Fei
    Li, Yuxun
    Chen, Jianhui
    Huang, Wei
    Sun, Cheng
    [J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2024, 44 (10) : 3264 - 3277
  • [8] Variations of Winter Precipitation over Southeastern China in Association with the North Atlantic Oscillation
    Maoyuan LOU
    Chao LI
    Shifeng HAO
    Juan LIU
    [J]. Journal of Meteorological Research, 2017, 31 (03) : 476 - 489
  • [9] Variations of Winter Precipitation over Southeastern China in Association with the North Atlantic Oscillation
    Lou, Maoyuan
    Li, Chao
    Hao, Shifeng
    Liu, Juan
    [J]. JOURNAL OF METEOROLOGICAL RESEARCH, 2017, 31 (03) : 476 - 489
  • [10] Variations of winter precipitation over southeastern China in association with the North Atlantic Oscillation
    Maoyuan Lou
    Chao Li
    Shifeng Hao
    Juan Liu
    [J]. Journal of Meteorological Research, 2017, 31 : 476 - 489