Space and time variability of meteorological drought in Syria

Mohammed, Safwan; Alsafadi, Karam; Al-Awadhi, Talal; Sherief, Youssef; Harsanyie, Endre; El Kenawy, Ahmed M.

doi:10.1007/s11600-020-00501-5

Artykuł - szczegóły

Tytuł artykułu

Space and time variability of meteorological drought in Syria

Autorzy

Mohammed Safwan , Alsafadi Karam , Al-Awadhi Talal , Sherief Youssef , Harsanyie Endre , El Kenawy Ahmed M.

Wybrane pełne teksty z tego czasopisma

https://www.springer.com/journal/11600

Identyfikatory

DOI

10.1007/s11600-020-00501-5

Warianty tytułu

Języki publikacji

Abstrakty

This study assesses the spatial and temporal characteristics (e.g., frequency, intensity, spatial extent) of meteorological drought in Syria. Specifcally, drought was characterized using the observed rainfall data from 36 rain gauges spanning the period between 1990 and 2010 and covering the main climatic regions in Syria (i.e., Mediterranean, arid, semiarid and mountainous). Meteorological drought was assessed using the standardized precipitation index (SPI) at 12-month timescale, allowing for detecting the impacts of climate variability on agricultural droughts. The dominant modes of drought were defned using an S-mode of the principal component analysis. To assess the links between meteorological drought evolution and vegetation greening in Syria, the time series of SPI were correlated with the normalized diference vegetation index (NDVI). Time series of NDVI were retrieved from the remotely sensed National Oceanic and Atmospheric Administration Advanced Very High-Resolution Radiometer (NOAA/AVHRR) sensor at a spatial resolution of 25 km for the common period 1990–2010. Trend analysis suggests a statistically signifcant increase in the frequency and intensity of drought at 12-month timescale. The observed intensifcation of meteorological drought is mostly associated with the increase in mild and moderate droughts, relative to extremes and very extreme droughts. Results also suggest a statistically signifcant decrease (p<0.05) in vegetation greening over Syria during the study period, especially in the eastern parts of the country. Our results demonstrate that the decrease in vegetation cover can directly be linked to the anomalous drought events, with Pearson’ r coefcients generally above 0.6. This dependency was more highlighted during wintertime for the Mediterranean vegetation and in northeastern portions of the country. Overall, the increase in the frequency and intensity of meteorological drought, combined with a series of unrest and political instability, have drastic impacts on the agricultural sector in Syria, with serious implications for crop yield

Słowa kluczowe

SPI NDVI spatio-temporal pattern climate change NOAA AVHRR vegetation Syria

SPI NDVI wzorzec czasoprzestrzenny zmiana klimatu NOAA AVHRR wegetacja Syria

Wydawca

Instytut Geofizyki PAN
Springer

Czasopismo

Acta Geophysica

Rocznik

2020

Tom

Vol. 68, no. 6

Strony

1877--1898

Opis fizyczny

Bibliogr. 149 poz.

Twórcy

autor

Mohammed Safwan

Institution of Land Utilization, Technology and Regional Planning, University of Debrecen, Debrecen 4032, Hungary

autor

Alsafadi Karam

Department of Geography and GIS, Faculty of Arts, Alexandria University, Alexandria 25435, Egypt

autor

Al-Awadhi Talal

Department of Geography, Sultan Qaboos University, Al Khoud, Muscat, Oman

autor

Sherief Youssef

Department of Geography, Sultan Qaboos University, Al Khoud, Muscat, Oman
Department of Geography, Faculty of Arts, Zagazig University, Zagazig, Egypt

autor

Harsanyie Endre

Institution of Land Utilization, Technology and Regional Planning, University of Debrecen, Debrecen 4032, Hungary
National Agricultural Research and Innovation Center, Institute of Agricultural Engineering, Tessedik Sámuel 4, Gödöllő H-2100, Hungary

autor

El Kenawy Ahmed M.

kenawy@mans.edu.eg

Department of Geography, Sultan Qaboos University, Al Khoud, Muscat, Oman
Department of Geography, Mansoura University, Mansoura 35516, Egypt

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