Abramopoulos F, Rosenzweig C and Choudhury B (1988) Improved ground hydrology calculations for global climate models (GCMs): Soil water movement and evapotranspiration. Journal of Climate 1(9):921-941
Austin RB, Cantero-Mart\inez C, Arrúe JL, Playán E and Cano-Marcellán P (1998) Yield-rainfall relationships in cereal cropping systems in the Ebro river valley of Spain. European Journal of Agronomy, Elsevier 8(3-4):239-248
Banimahd S and Khalili D (2014) Drought class transition analysis by Markov Chains and Log-Linear models: approach for early drought warning. Iran-Watershed Management Science & Engineering 8(24):1-5
Bordi I, Fraedrich K, Petitta M and Sutera A (2006) Large-scale assessment of drought variability based on NCEP/NCAR and ERA-40 re-analyses. Water Resources Management 20(6):899-915
DeGaetano AT (1999) A temporal comparison of drought impacts and responses in the New York city metropolitan area. Climatic Change, Springer 42(3):539-560
Dupigny-Giroux L-A (2001) Towards characterizing and planning for drought in vermont-part i: a climatological perspectwe. JAWRA Journal of the American Water Resources Association, Wiley Online Library 37(3):505-525
European center for Medium-Range Weather Forecasts (ECMWF) (2013) European centre for Medium-Range Weather Forecasts (ECMWF) 2005. User Guide
Evans J and Geerken R (2004) Discrimination between climate and human-induced dryland degradation. Journal of Arid Environments 57(4):535-554
Flannigan MD and Harrington J (1988) A study of the relation of meteorological variables to monthly provincial area burned by wildfire in Canada (1953-80). Journal of Applied Meteorology 27(4):441-452
Hayes MJ (1999) Drought indices. National Drought Mitigation Center, Available on line: http://www. civil. utah. edu/~ cv5450/swsi/indices. htm# deciles
Karl TR and Riebsame WE (1984) The identification of 10- to 20-year temperature and precipitation fluctuations in the contiguous united states. Journal of Applied Meteorology, 950-966, Available at: http://dx.doi.org/10.1175%2F1520-0450%281984% 29023%3C0950%3ATIOTYT%3E2.0.CO%3B2
Khalighi Sigaroudi S, Sadeghi sangdehi S, Awsati K and Ghavidel Rahimi Y (2009) The study of drought and wet year assessment models for stations in Mazandaran Province. Iranian journal of Range and Desert Reseach 16(1):44-54 (In Persian)
Labudova L, Schefczyk L and Heinemann G (2014) The comparison of the SPI and the SPEI using COSMO model data in two selected Slovakian river basins. EGU General Assembly Conference Abstracts
Leilah AA and Al-Khateeb SA (2005) Statistical analysis of wheat yield under drought conditions. Journal of Arid environments, Elsevier 61(3):483-496
Liu Y, Zhou Y, Ju W, Wang S, Wu X, He M and Zhu G (2014) Impacts of droughts on carbon sequestration by China’s terrestrial ecosystems from 2000 to 2011. Biogeosciences 11(10):2583-2599
Mavromatis T (2007) Drought index evaluation for assessing future wheat production in Greece. International Journal of Climatology, Wiley Online Library 27(7):911-924
Mckee TB, Doesken NJ and Kleist J (1993) The relationship of drought frequency and duration to time scales. AMS 8th Conference on Applied Climatology (January):179-184. Available at: http://ccc.atmos.colostate.edu/relationshipofdroughtfrequency.pdf
Mosaedi A, Khalili zade M and Mohammadi A (2008) Drought monitoring in Golestan Province. J. agric. sci. natur. resour 15(2) (In Persian)
Mostafazadeh R and Zabihi M (2016) Comparison of SPI and SPEI indices to meteorological drought assessment using R programming (Case study: Kurdistan Province). Journal of the Earth and Space Physics 42(3):633-643 (In Persian)
Nosrati K (2015) Assessment of Standardized Precipitation Evapotranspiration Index (SPEI) for drought identification in different climates of Iran. Environmental Sciences 12(4):63-74 (In Persian)
Pickup G (1999) Desertification and climate change-the Australian perspective. Climate Research 11(1):51-63
Potop V (2011) The application a new drought index-standardized precipitation evapotranspiration index in the Czech Republic. Mikroklima a mezoklima krajinnych struktur a antropogennnich prostredi 2(2010):4.2. Available at: http://www.cbks.cz/ SbornikSMlyn11/Potop1.pdf
Raziei T, Bordi I and Pereira LS (2011) An application of GPCC and NCEP/NCAR datasets for drought variability analysis in Iran. Water resources management. Springer 25(4):1075-1086
Raziei T, Bordi I, Pereira LS and Sutera A (2010) Space-time variability of hydrological drought and wetness in Iran using NCEP/NCAR and GPCC datasets. Hydrology and Earth System Sciences 14(10):1919-1930
Raziei T, Saghafian B, Paulo AA, Pereira LS and Bordi I (2009) Spatial patterns and temporal variability of drought in Western Iran. Water Resources Management 23(3):439-455
Rossi G (2003) Tools for drought mitigation in Mediterranean Regions. Springer Science & Business Media
Singh VP, Guo H and Yu FX (1993) Parameter estimation for 3-parameter log-logistic distribution (LLD3) by Pome. Stochastic Hydrology and Hydraulics, Springer 7(3):163-177
Stagge JH, Kohn I, Tallaksen LM and Stahl K (2015) Modeling drought impact occurrence based on meteorological drought indices in Europe. Journal of Hydrology, Elsevier, B.V. 530:37-50, Available at: http://dx.doi.org/10.1016/j.jhydrol.2015.09.039
Tajbakhsh S, Eisakhani N and Fazel Kazemi N (2015) Assessment of meteorological drought in Iran using standardized precipitation and evapotranspiration index (SPEI). Journal of the Earth and Space Physics 41:313-321 (In Persian)
Thornthwaite CW (1948) An approach toward a rational classification of climate. Geographical Review 38:55-94
Vicente-Serrano SM, Beguer’\ia S and López-Moreno JI (2010) A multiscalar drought index sensitive to global warming: the standardized precipitation evapotranspiration index. Journal of climate 23(7):1696-1718
Vicente-Serrano SM and Lopez-Moreno JI (2005) Hydrological response to different time scales of climatological drought: an evaluation of the standardized precipitation index in amountainous mediterranean basin. Hydrology and Earth System Sciences 9:523-533
Xie P, Janowiak JE, Arkin PA, Adler R, Gruber A, Ferraro R, Huffman GJ and Curtis S (2003) GPCP pentad precipitation analyses: An experimental dataset based on gauge observations and satellite estimates. Journal of Climate 16(13):2197-2214
Yao N, Li Y, Lei T and Peng L (2018) Drought evolution, severity and trends in mainland China over 1961–2013. Science of the Total Environment 616–617:73–89. Available at: http://www.science direct.com/science/article/pii/S0048969717330450
Zare Abianeh H and Mahboobi A (2004) Evaluation of drought situation and its process in Hamadan region on the basis of drought statistical indexes. Pajouhesh & Sazandegi 16(64):2-7 (In Persian)
Zare Abyaneh H, Ghabaei Sough M and Mosaedi A (2015) Drought monitoring based on Standardized Precipitation Evaoptranspiration Index (SPEI) under the effect of climate change. Journal of Water and Soil 29(2):374-392
Zeynali B and Safarian Zengir V (2017) Drought monitoring in Urmia Lake by fuzzy index. Journal of Natural Environmental Hazards 6(12):37-62