Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.5177 |
Synoptic conditions leading to extremely warm periods in Western Iran | |
Darand, M.1; Garcia-Herrera, R.2,3; Asakereh, H.4; Amiri, R.1; Barriopedro, David2,3 | |
2018 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY
![]() |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2018 |
卷号 | 38期号:1页码:307-319 |
文章类型 | Article |
语种 | 英语 |
国家 | Iran; Spain |
英文摘要 | The purpose of this study is the characterization of the synoptic circulation patterns leading to extremely warm periods (EWPs) over the Kurdistan province of Iran. Daily maximum temperature data from 27 meteorological stations were used for the period 1962-2012. Data were interpolated to a 6x6km grid using the geospatial Kriging method. EWPs were defined as a period of at least 6 consecutive days with maximum temperature above the local daily-based 95th percentile of the 1971-2000 period, with additional criteria for spatial extension. The identified EWPs are distributed through the whole year, with maximum frequencies in winter and summer. Interestingly, the decade 1988-1997 did not record any extreme episode and summer extremes were recorded only before 1983. The associated synoptic patterns were classified into four clusters by applying the Ward's hierarchical clustering method to sea level pressure and Z500 data. Four clusters are identified: two represent warm periods in winter, one those occurring spring, especially in March, and another one mainly reflecting summer heat waves. In general, it is found that EWPs are associated with statistically significant anomalies in regional circulation. A deep trough of geopotential height in 500 hPa over North Africa and a ridge directly over the study area were the more important causes for the occurrence of EWPs. Other synoptic configurations that favour extreme periods in winter and summer include, respectively, the northward expansion of the Sudan low pressure with an associated southerly wind advection and the persistence of anticyclonic circulation at all tropospheric levels enhancing subsidence and adiabatic heating. The spring pattern is the most frequent one (nearly 48% of all cases) and reflects a southeastward extension of the subpolar low pressure that leads to the displacement of the Siberian high to south and southwestern Asia and the accompanied northward expansion of the Sudan low. |
英文关键词 | synoptic patterns warm periods Iran climate |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000419093600022 |
WOS关键词 | HEAT-WAVE ; TEMPERATURE EXTREMES ; OBSERVED TRENDS ; CLIMATE ; VARIABILITY ; SUMMER ; EVENTS ; PRECIPITATION ; RAINFALL ; CLUSTER |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/37521 |
专题 | 气候变化 |
作者单位 | 1.Univ Kurdistan, Dept Climatol, Pasdaran St,POB 416, Sanandaj, Iran; 2.Univ Complutense Madrid, Fac Ciencias Fis, Dept Fis Tierra 2, Madrid, Spain; 3.UCM, Inst Geociencias, IGEO, CSIC, Madrid, Spain; 4.Univ Zanjan, Dept Climatol, Zanjan, Iran |
推荐引用方式 GB/T 7714 | Darand, M.,Garcia-Herrera, R.,Asakereh, H.,et al. Synoptic conditions leading to extremely warm periods in Western Iran[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2018,38(1):307-319. |
APA | Darand, M.,Garcia-Herrera, R.,Asakereh, H.,Amiri, R.,&Barriopedro, David.(2018).Synoptic conditions leading to extremely warm periods in Western Iran.INTERNATIONAL JOURNAL OF CLIMATOLOGY,38(1),307-319. |
MLA | Darand, M.,et al."Synoptic conditions leading to extremely warm periods in Western Iran".INTERNATIONAL JOURNAL OF CLIMATOLOGY 38.1(2018):307-319. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论