Investigating climatic changes of the wind regime over Western Iran
Abstract Objective The aim of the present study was to reveal changes in the wind regime by investigating wind-speed data from meteorological stations in western Iran and comparing them in the last three decades (1986–2015). Results Two main groups of daily cycles were identified; one group with a s...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
BMC
2020-09-01
|
| Series: | BMC Research Notes |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s13104-020-05275-z |
| _version_ | 1819225941278195712 |
|---|---|
| author | Zohreh Maryanaji Omid Hamidi |
| author_facet | Zohreh Maryanaji Omid Hamidi |
| author_sort | Zohreh Maryanaji |
| collection | DOAJ |
| description | Abstract Objective The aim of the present study was to reveal changes in the wind regime by investigating wind-speed data from meteorological stations in western Iran and comparing them in the last three decades (1986–2015). Results Two main groups of daily cycles were identified; one group with a single peak and one group with two or more peaks. Using spectral decomposition technique, it was revealed that the heterogeneity observed in the area in terms of altitude and topography results in differences in the density of the spectra with similar frequencies. Two main daily cycles were also identified for each station. Although there were low frequencies, the intensity of the waves at the examined stations was the consequence of the interaction between the frequency, period, and distribution space. By evaluating harmonics in the area, it was revealed that the variance of the first harmonic is maximized in the south and southwest, while the variance of the second harmonic is maximized in the north and northwest. The positive value of the trend in the first harmonic indicated that the trend of the variance for the first harmonic has increased in the central and eastern parts and has decreased in the northern and western parts. |
| first_indexed | 2024-12-23T10:17:35Z |
| format | Article |
| id | doaj.art-3a84d88b57c04893ab4823646a76f6e2 |
| institution | Directory Open Access Journal |
| issn | 1756-0500 |
| language | English |
| last_indexed | 2024-12-23T10:17:35Z |
| publishDate | 2020-09-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Research Notes |
| spelling | doaj.art-3a84d88b57c04893ab4823646a76f6e22022-12-21T17:50:47ZengBMCBMC Research Notes1756-05002020-09-011311710.1186/s13104-020-05275-zInvestigating climatic changes of the wind regime over Western IranZohreh Maryanaji0Omid Hamidi1Department of Geography, Sayyed Jamaleddin Asadabadi UniversityDepartment of Science, Hamedan University of TechnologyAbstract Objective The aim of the present study was to reveal changes in the wind regime by investigating wind-speed data from meteorological stations in western Iran and comparing them in the last three decades (1986–2015). Results Two main groups of daily cycles were identified; one group with a single peak and one group with two or more peaks. Using spectral decomposition technique, it was revealed that the heterogeneity observed in the area in terms of altitude and topography results in differences in the density of the spectra with similar frequencies. Two main daily cycles were also identified for each station. Although there were low frequencies, the intensity of the waves at the examined stations was the consequence of the interaction between the frequency, period, and distribution space. By evaluating harmonics in the area, it was revealed that the variance of the first harmonic is maximized in the south and southwest, while the variance of the second harmonic is maximized in the north and northwest. The positive value of the trend in the first harmonic indicated that the trend of the variance for the first harmonic has increased in the central and eastern parts and has decreased in the northern and western parts.http://link.springer.com/article/10.1186/s13104-020-05275-zWind regime variabilityHarmonicswest of iranLocal windsHomogenizationSpectral analysis |
| spellingShingle | Zohreh Maryanaji Omid Hamidi Investigating climatic changes of the wind regime over Western Iran BMC Research Notes Wind regime variability Harmonics west of iran Local winds Homogenization Spectral analysis |
| title | Investigating climatic changes of the wind regime over Western Iran |
| title_full | Investigating climatic changes of the wind regime over Western Iran |
| title_fullStr | Investigating climatic changes of the wind regime over Western Iran |
| title_full_unstemmed | Investigating climatic changes of the wind regime over Western Iran |
| title_short | Investigating climatic changes of the wind regime over Western Iran |
| title_sort | investigating climatic changes of the wind regime over western iran |
| topic | Wind regime variability Harmonics west of iran Local winds Homogenization Spectral analysis |
| url | http://link.springer.com/article/10.1186/s13104-020-05275-z |
| work_keys_str_mv | AT zohrehmaryanaji investigatingclimaticchangesofthewindregimeoverwesterniran AT omidhamidi investigatingclimaticchangesofthewindregimeoverwesterniran |