DOI: 10.1016/j.gloplacha.2013.08.011
论文题名: Temporal and spatial trend detection of maximum air temperature in Iran during 1960-2005
作者: Kousari M.R. ; Ahani H. ; Hendi-zadeh R.
刊名: Global and Planetary Change
ISSN: 0921-8184
出版年: 2013
卷: 111 起始页码: 97
结束页码: 110
语种: 英语
英文关键词: Climate change
; Iran
; T max
; Trend
Scopus关键词: Comprehensive research
; Iran
; Sen's slope estimators
; Spatial distribution patterns
; T max
; Temperature trends
; Temporal and spatial
; Trend
; Atmospheric temperature
; Climate change
; Greenhouse gases
; Land use
; Spatial distribution
; Time measurement
; Time series
; air temperature
; filtration
; global warming
; growing season
; land use change
; slope
; spatial distribution
; spatiotemporal analysis
; time series analysis
; Iran
英文摘要: Trends of maximum air temperature (T max) were investigated in three time scales including annual, seasonal, and monthly time series in 32 synoptic stations in the whole of Iran during 1960-2005. First, nonparametric Mann-Kendall test after removal of the lag-1 serial correlation component from the T max time series was used for trend detection and spatial distribution of various trends was mapped. Second, Sen's slope estimator was used to determine the median slope of positive or negative T max trends. Third, 10-year moving average low-pass filter was applied to facilitate the trend analysis and the smoothed time series derived from the mentioned filter were clustered in three clusters for each time series and then were plotted to show their spatial distribution patterns in Iran. Results showed that there are considerable significant positive trends of T max in warm months including April, June, July, August and September and warm seasons. These trends can be found in an annual time scale which indicated almost 50% positive trends. However, cold months and seasons did not exhibit a remarkable significant trend. Although it was rather difficult to detect particular spatial distribution of significant trends, some parts in west, north-east and south-east and central regions of the country showed more positive trends. In an annual time scale, Kermanshah located in west regions indicates most change at (+) 0.41. °C per decade. On the one hand, many clusters of normalized and filtered T max time series revealed the increasing trend after 1970 which has dramatically risen after around 1990. It is in accordance with many other findings for temperature time series from different countries and therefore, it can be generated from simultaneous changes in a bigger scale than regional one. On the other hand, the concentration of increasing trends of T max in warm seasons and their accordance to plants growing season in Iran can raise the importance of the role of frequent reported land use changes during past decades. Generally, the more sophisticated and comprehensive researches are needed to determine the role of different factors such as the emission of greenhouse gases and land use changes influencing temperature trends in Iran. © 2013 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84884380391&doi=10.1016%2fj.gloplacha.2013.08.011&partnerID=40&md5=44c25d3e805857d0a820b5da92d17e37
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11090
Appears in Collections: 全球变化的国际研究计划
There are no files associated with this item.
作者单位: Management Center for Strategic Projects, Fars Organization Center of Jihad Agriculture, Shiraz, Iran
Recommended Citation:
Kousari M.R.,Ahani H.,Hendi-zadeh R.. Temporal and spatial trend detection of maximum air temperature in Iran during 1960-2005[J]. Global and Planetary Change,2013-01-01,111.