Wavelet and cross correlation analysis on some climatology parameters of Nepal
This study has been performed to understand the relationship between sunspot numbers (SSN) with climatology related parameters like temperature and rainfall from 1901 to 2016. The spectral characteristics of sunspot numbers, temperature and rainfall have been observed using continuous wavelet trans...
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| Format: | Article |
| Language: | English |
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Department of Physics, Mahendra Morang Adarsh Multiple Campus, Tribhuvan University
2021-05-01
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| Series: | Bibechana |
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| Online Access: | https://www.nepjol.info/index.php/BIBECHANA/article/view/33805 |
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| author | Babu Ram Tiwari Jiyao Xu Binod Adhikari Narayan Prasad Chapagain |
| author_facet | Babu Ram Tiwari Jiyao Xu Binod Adhikari Narayan Prasad Chapagain |
| author_sort | Babu Ram Tiwari |
| collection | DOAJ |
| description |
This study has been performed to understand the relationship between sunspot numbers (SSN) with climatology related parameters like temperature and rainfall from 1901 to 2016. The spectral characteristics of sunspot numbers, temperature and rainfall have been observed using continuous wavelet transform. Cross-correlation analyses were also performed to find any relation among temperature, rainfall, and sunspot numbers. The 9–11 year periodicity of sunspot numbers confirmed by wavelet transform in annual scale. The periodicity of high-frequency signals is identified between 4 to 11 years whereas the low frequencies signal is found throughout the periods of observation for temperature. Similarly, it is clear that there is more concentration of power between 8–16 years for rainfall. Cross-correlation analysis shows that the sunspot numbers is highly correlated with rainfall and temperature (correlation coefficient ~ 0.8054). The time lag relationship resulted in the almost simultaneous linear relationship between the temperature, rainfall, and the SSN tendency. The development of convective motions over the subtropics might be affected by the time rate of change of SSN combined with the surface temperature changes of diverse time scales. The convective motions were mostly controlled by the available amount of water vapor and the stability of the atmosphere that had a strong connection with the heat capacity of the concerned region. To produce more authentic findings for policy implications, further comprehensive and appropriate research can be undertaken and implemented in this very important field.
BIBECHANA 18 (2) (2021) 105-115
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| first_indexed | 2024-04-24T05:49:55Z |
| format | Article |
| id | doaj.art-3f02a34a691e4ff19b0441416561c0ae |
| institution | Directory Open Access Journal |
| issn | 2091-0762 2382-5340 |
| language | English |
| last_indexed | 2024-04-24T05:49:55Z |
| publishDate | 2021-05-01 |
| publisher | Department of Physics, Mahendra Morang Adarsh Multiple Campus, Tribhuvan University |
| record_format | Article |
| series | Bibechana |
| spelling | doaj.art-3f02a34a691e4ff19b0441416561c0ae2024-04-23T13:05:04ZengDepartment of Physics, Mahendra Morang Adarsh Multiple Campus, Tribhuvan UniversityBibechana2091-07622382-53402021-05-0118210.3126/bibechana.v18i2.33805Wavelet and cross correlation analysis on some climatology parameters of NepalBabu Ram Tiwari0Jiyao Xu1Binod Adhikari2Narayan Prasad Chapagain3State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, BeijingState Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, BeijingDepartment of Physics, St. Xavier’s College, Maitighar , KathmanduDepartment of Physics, Amrit Campus, Tribhuvan University, Kathmandu This study has been performed to understand the relationship between sunspot numbers (SSN) with climatology related parameters like temperature and rainfall from 1901 to 2016. The spectral characteristics of sunspot numbers, temperature and rainfall have been observed using continuous wavelet transform. Cross-correlation analyses were also performed to find any relation among temperature, rainfall, and sunspot numbers. The 9–11 year periodicity of sunspot numbers confirmed by wavelet transform in annual scale. The periodicity of high-frequency signals is identified between 4 to 11 years whereas the low frequencies signal is found throughout the periods of observation for temperature. Similarly, it is clear that there is more concentration of power between 8–16 years for rainfall. Cross-correlation analysis shows that the sunspot numbers is highly correlated with rainfall and temperature (correlation coefficient ~ 0.8054). The time lag relationship resulted in the almost simultaneous linear relationship between the temperature, rainfall, and the SSN tendency. The development of convective motions over the subtropics might be affected by the time rate of change of SSN combined with the surface temperature changes of diverse time scales. The convective motions were mostly controlled by the available amount of water vapor and the stability of the atmosphere that had a strong connection with the heat capacity of the concerned region. To produce more authentic findings for policy implications, further comprehensive and appropriate research can be undertaken and implemented in this very important field. BIBECHANA 18 (2) (2021) 105-115 https://www.nepjol.info/index.php/BIBECHANA/article/view/33805Climate variabilityWavelet transformCross-correlation analysis |
| spellingShingle | Babu Ram Tiwari Jiyao Xu Binod Adhikari Narayan Prasad Chapagain Wavelet and cross correlation analysis on some climatology parameters of Nepal Bibechana Climate variability Wavelet transform Cross-correlation analysis |
| title | Wavelet and cross correlation analysis on some climatology parameters of Nepal |
| title_full | Wavelet and cross correlation analysis on some climatology parameters of Nepal |
| title_fullStr | Wavelet and cross correlation analysis on some climatology parameters of Nepal |
| title_full_unstemmed | Wavelet and cross correlation analysis on some climatology parameters of Nepal |
| title_short | Wavelet and cross correlation analysis on some climatology parameters of Nepal |
| title_sort | wavelet and cross correlation analysis on some climatology parameters of nepal |
| topic | Climate variability Wavelet transform Cross-correlation analysis |
| url | https://www.nepjol.info/index.php/BIBECHANA/article/view/33805 |
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