Intraseasonal monsoon fluctuations seen through 25 years of Indian radiosonde observations
Radiosonde records for 12, major Indian cities have been checked and analyzed for intraseasonal set type sonal activity in the monsoon, After forming time series with two observation per day removing bad values, and filling data gaps with linear interpolation, the time series have been plotted with and without filtering and have been subjected to spectral analysis to reveal the nature of intraseasonal fluctuations and their interannual variability. Spectra were estimated from the time, series using the maximum entropy method (MEM) which fits an autoregresslve; (AR) model to the time series. M.EM spectra bases on tenth order AR models show that most of the variance In monsoon weather comes from intra seasonal activity with periods longer than 10 days, but do not show separate peaks at 10.20 and/or 30-50 day time scales for the majority of summers.
How to Cite
Copyright (c) 2021 MAUSAM
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
All articles published by MAUSAM are licensed under the Creative Commons Attribution 4.0 International License. This permits anyone.
Anyone is free:
- To Share - to copy, distribute and transmit the work
- To Remix - to adapt the work.
Under the following conditions:
- Share - copy and redistribute the material in any medium or format
- Adapt - remix, transform, and build upon the material for any purpose, even