Assessing long-term spatio-temporal variability in humidity and drought in Iran using Pedj Drought Index (PDI)

Lashkari，Azam1; Irannezhad，Masoud2; Zare，Hossein3; Labzovskii，Lev4

2021-02-01

10.1016/j.jaridenv.2020.104336

JOURNAL OF ARID ENVIRONMENTS   影响因子和分区

0140-1963

1095-922X

Although drought is a normal feature of climate, there is confusion about its characteristics in both arid and semi-arid regions. This study investigated the effects of changes in precipitation and temperature on spatio-temporal drought and humidity variations throughout the diverse (principally arid- and semi-arid) climates of Iran during recent decades using the Pedj Drought Index (PDI). The standardized anomaly index (SAI) for annual precipitation (SAI) and mean temperature (SAI) was calculated using their monthly records at sixteen meteorological stations scattered throughout Iran during 1951–2010. The results showed: (1) statistically significant (p < 0.05) drying trends in annual PDI values at most of the stations, primarily accompanied by substantial increases in annual SAI; (2) considerable positive and negative relationships of annual PDI with annual SAI and SAI, respectively; (3) the 1970s/2000s as the predominant humid/dry decade; (4) More frequent drought than humidity events at ~81% of stations; (5) the longest drought was 13 years (1998–2010) seen at the Kermanshah station, with the semi-dry climate in the west of Iran; and (6) the 2010 drought spatially extended over all the stations studied throughout the country. In conclusion, the PDI acceptably succeeded to characterize annual droughts in Iran previously captured by other prominent recommended drought indices.

Arid and semi-arid environments Humidity/drought Iran Pedj drought index (PDI) Standardized anomaly index (SAI) Warming trend

SCI

英语

通讯

Strategic Priority Research Program of the Chinese Academy of Sciences[XDA20060401]

Environmental Sciences & Ecology

Ecology ; Environmental Sciences

WOS:000589890500006

ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD

ENVIRONMENT/ECOLOGY

2-s2.0-85092653729

Scopus

1.CIMMYT-Henan Collaborative Innovation Center,Henan Agricultural University,Zhengzhou,450046,China
2.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Institute of Soil Science and Land Evaluation,University of Hohenheim,Stuttgart,Germany
4.R&D Satellite and Observations Group,Netherlands Meteorological Institute (KNMI),De Bilt,Netherlands

Lashkari，Azam,Irannezhad，Masoud,Zare，Hossein,et al. Assessing long-term spatio-temporal variability in humidity and drought in Iran using Pedj Drought Index (PDI)[J]. JOURNAL OF ARID ENVIRONMENTS,2021,185.

Lashkari，Azam,Irannezhad，Masoud,Zare，Hossein,&Labzovskii，Lev.(2021).Assessing long-term spatio-temporal variability in humidity and drought in Iran using Pedj Drought Index (PDI).JOURNAL OF ARID ENVIRONMENTS,185.

Lashkari，Azam,et al."Assessing long-term spatio-temporal variability in humidity and drought in Iran using Pedj Drought Index (PDI)".JOURNAL OF ARID ENVIRONMENTS 185(2021).