drought monitoring and early warning system in Iran. To overcome this obstacle, we have evaluated the applicability of GPCC … and NCEP/NCAR precipitation datasets for drought analysis in Iran. For this purpose, drought variability across the … and NCEP/NCAR datasets identify the same sub-regions of drought variability and they are in good agreement with …

An analysis of drought in western Iran from 1966 to 2000 is presented using monthly precipitation data observed at 140 … gauges uniformly distributed over the area. Drought conditions have been assessed by means of the Standardized Precipitation … Index (SPI). To study the long-term drought variability the principal component analysis was applied to the SPI field …

sets (NCEP/NCAR and ERA-40) on the assessment of drought variability are analysed. Particular attention has been devoted to … the analysis of the possible existence of a linear trend in the climatic signal. The long-term aspects of drought over the … analyses carried out with the two data sets, we studied the leading space-time variability of drought by applying the principal …

Using monthly meteorological observation data at 633 sites in China during 1961–2012, the drought severity change has …. There is no evidence of an increase in drought severity over China taking the whole country into account. On the contrary …

In the present study, the Standardized precipitation index (SPI) was employed to analyze the drought status of the … Dapoling basin over a period of autumn from September to November, because drought events frequently occur during this period … precipitation of the basin. Based on the SPI value, the classification of drought was provided. Besides, considering the fact that …

This study aims to model the joint drought duration and severity distribution using two-dimensional copulas. The method … as a function of the dependence parameters. The drought duration and severity are assumed to be exponential and gamma …. The copula fitting results for drought duration and severity are quite satisfactory. The bivariate drought analyses …

We assess the changes in drought conditions during summer in the Republic of Moldova based on the Standardized …

This paper analyses monthly differences in drought impact on vegetation activity in a semi-arid region in the north …-east of the Iberian Peninsula between 1987 and 2000. The study determines spatial differences in the effects of drought on the … natural vegetation and agricultural crops by means of the joint use of vegetation indexes derived from AVHRR images, a drought …

Meteorological drought events occur in Bangladesh are diagnosed using monthly rainfall and mean air temperature from … Palmer Drought Severity Index (PDSI) for the period 1961–1990. The historical records of drought event obtained from the … based on the observed data shows that regional information is better in drought diagnosis compared to the point information …

state, India. Drought is a recurrent phenomenon and risk assessment of droughts can play an important role in proper … planning and management of water resources in the study region. In the study, drought events are characterized by severity and … duration, and drought occurrences are modeled by Standardized Precipitation Index (SPI) computed on mean areal precipitation …