rend Analysis and Estimating Return Periods of Extreme Temperature and Precipitation in Tabriz
Trend analysis of 27 indices related with extreme temperature and precipitation during 1961-2011 were conducted in Tabriz using the non-parametric Mann-Kendall test and Sen’s Estimator Slope methods. Furthermore Generalized Extreme Value distribution fitted to observational extreme events. Values of...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | fas |
| Published: |
University of Tabriz
2015-01-01
|
| Series: | نشریه جغرافیا و برنامهریزی |
| Subjects: | |
| Online Access: | https://geoplanning.tabrizu.ac.ir/article_3126_9985bd59eebf555ea03b8c2c5a26ffb5.pdf |
| _version_ | 1797256971648237568 |
|---|---|
| author | Saeed Jahanbakhsh Asl Ali . Mohammad Khorshiddoost yaghoob Din Pazhooh Fatemeh Sarafroozeh |
| author_facet | Saeed Jahanbakhsh Asl Ali . Mohammad Khorshiddoost yaghoob Din Pazhooh Fatemeh Sarafroozeh |
| author_sort | Saeed Jahanbakhsh Asl |
| collection | DOAJ |
| description | Trend analysis of 27 indices related with extreme temperature and precipitation during 1961-2011 were conducted in Tabriz using the non-parametric Mann-Kendall test and Sen’s Estimator Slope methods. Furthermore Generalized Extreme Value distribution fitted to observational extreme events. Values of quantiles of the variables were estimated for different return periods. Results indicated that during the past half century, trends of indices for summer days, tropical nights and warm nights were upward and statistically significant. Trends of indices related to ice days and cool days were downward and significant. Minimum values of daily minimum and maximum temperature in year indicate significant increasing trends. Indices of number of days with precipitation greater or equal to 10 and 15 mm, consecutive wet days, total precipitation in wet days and total precipitation when rainfall is greater than 95 and 99 percentiles have experienced significant decreasing trends. After fitting GEV distribution to annual values of daily minimum and maximum temperature as well as daily maximum precipitation in Tabriz Growth curves and Q-Q plats were illustrated. Investigation of plots indicated that this distribution function has more capability in fitting of time series of extreme value even in tails of the distribution. |
| first_indexed | 2024-04-24T22:30:13Z |
| format | Article |
| id | doaj.art-2a7a453d1e2349a1988f505940d42f61 |
| institution | Directory Open Access Journal |
| issn | 2008-8078 2717-3534 |
| language | fas |
| last_indexed | 2024-04-24T22:30:13Z |
| publishDate | 2015-01-01 |
| publisher | University of Tabriz |
| record_format | Article |
| series | نشریه جغرافیا و برنامهریزی |
| spelling | doaj.art-2a7a453d1e2349a1988f505940d42f612024-03-19T21:54:18ZfasUniversity of Tabrizنشریه جغرافیا و برنامهریزی2008-80782717-35342015-01-0118501071333126rend Analysis and Estimating Return Periods of Extreme Temperature and Precipitation in TabrizSaeed Jahanbakhsh Asl0Ali . Mohammad Khorshiddoost1yaghoob Din Pazhooh2Fatemeh Sarafroozeh3Meteorological Department, University of TabrizMeteorological Department, University of TabrizDepartment of Water Resources, Faculty of Agriculture, University of TabrizGraduate Doctorate in Physical Geography tendency climatology, University of TabrizTrend analysis of 27 indices related with extreme temperature and precipitation during 1961-2011 were conducted in Tabriz using the non-parametric Mann-Kendall test and Sen’s Estimator Slope methods. Furthermore Generalized Extreme Value distribution fitted to observational extreme events. Values of quantiles of the variables were estimated for different return periods. Results indicated that during the past half century, trends of indices for summer days, tropical nights and warm nights were upward and statistically significant. Trends of indices related to ice days and cool days were downward and significant. Minimum values of daily minimum and maximum temperature in year indicate significant increasing trends. Indices of number of days with precipitation greater or equal to 10 and 15 mm, consecutive wet days, total precipitation in wet days and total precipitation when rainfall is greater than 95 and 99 percentiles have experienced significant decreasing trends. After fitting GEV distribution to annual values of daily minimum and maximum temperature as well as daily maximum precipitation in Tabriz Growth curves and Q-Q plats were illustrated. Investigation of plots indicated that this distribution function has more capability in fitting of time series of extreme value even in tails of the distribution.https://geoplanning.tabrizu.ac.ir/article_3126_9985bd59eebf555ea03b8c2c5a26ffb5.pdfextreme climate eventsnonparametric mann-kendal testgeneralized extreme value distributionreturn periodtabriz |
| spellingShingle | Saeed Jahanbakhsh Asl Ali . Mohammad Khorshiddoost yaghoob Din Pazhooh Fatemeh Sarafroozeh rend Analysis and Estimating Return Periods of Extreme Temperature and Precipitation in Tabriz نشریه جغرافیا و برنامهریزی extreme climate events nonparametric mann-kendal test generalized extreme value distribution return period tabriz |
| title | rend Analysis and Estimating Return Periods of Extreme Temperature and Precipitation in Tabriz |
| title_full | rend Analysis and Estimating Return Periods of Extreme Temperature and Precipitation in Tabriz |
| title_fullStr | rend Analysis and Estimating Return Periods of Extreme Temperature and Precipitation in Tabriz |
| title_full_unstemmed | rend Analysis and Estimating Return Periods of Extreme Temperature and Precipitation in Tabriz |
| title_short | rend Analysis and Estimating Return Periods of Extreme Temperature and Precipitation in Tabriz |
| title_sort | rend analysis and estimating return periods of extreme temperature and precipitation in tabriz |
| topic | extreme climate events nonparametric mann-kendal test generalized extreme value distribution return period tabriz |
| url | https://geoplanning.tabrizu.ac.ir/article_3126_9985bd59eebf555ea03b8c2c5a26ffb5.pdf |
| work_keys_str_mv | AT saeedjahanbakhshasl rendanalysisandestimatingreturnperiodsofextremetemperatureandprecipitationintabriz AT alimohammadkhorshiddoost rendanalysisandestimatingreturnperiodsofextremetemperatureandprecipitationintabriz AT yaghoobdinpazhooh rendanalysisandestimatingreturnperiodsofextremetemperatureandprecipitationintabriz AT fatemehsarafroozeh rendanalysisandestimatingreturnperiodsofextremetemperatureandprecipitationintabriz |