Bir bölgeye düşen yağış miktarının, bölgedeki buharlaşma miktarından az olma durumunda kuraklık ortaya çıkar. Nem azlığının boyutu ve uzunluğu meteorolojik kuraklığın şiddetini belirler. Yağışların seyrekleşmesi ile başlayan kuraklığı tarımsal hidrolojik takip eder. Tarımsal kuraklıkla birlikte ürün miktarında azalma olur bu durum canlılar için tehlike oluşturmaktadır. Farklı zaman ölçeklerinde...

Introduction ‘Everybody talks about the weather, but nobody does anything about it’, said Mark Twain. But this famous quote is decidedly inaccurate: people have long contemplated weather modification, and both adapt or adjust to weather conditions, and move towards or away from certain climatic regimes. Southern Africa generally has a high coefficient of rainfall variation, making droughts a fr...

Real-time information on the development of the drought conditions is one of the fundamental requisites for reinforcing the drought mitigation and preparedness. The EuroGEOSS interoperability approach promotes the development of monitoring and early warning systems based on real-time information. Different climatic databases, which are based on publicly available meteorological information, are...

Drought is a complex natural hazard which can have negative effects on agriculture, economy, and human life. In this paper, the primary goal is to explore the application of the Gravity Recovery and Climate Experiment (GRACE) gravity satellite data for the quantitative investigation of the recent drought dynamic over the arid land of northwestern China, a region with scarce hydrological and met...

The aim of this study is to investigate climate change impact on Karoon3 basin in future periods. For this purpose, the simulated precipitation of 10 AOGCM models, including BCM2.0, CGCM3T63, CNRMCM3, CSIROMK3.0, GFDLCM2.0, GISS-ER, HADCM3, INMCM3.0, IPSLCM4, MIROC3.2 MEDRES was used to simulate drought index. Monthly precipitation was calculated by inverse distance weighted method. Standard Pr...

Drought is a major problematic phenomenon for the mostly semi-arid country of Iran. The north centralregions of Iran (north of Esfahan and Ghom province) have suffered from severe droughts several times duringthe last three decades. The frequent occurrence of drought in these regions is due to low and inconsistentprecipitation, abnormally high temperatures, increases in surface albedo and evapo...

regional vegetation plays an important role in modeling ecosystem changes and conservation. meteorological drought indices which are directly obtained from such meteorological data as precipitation can't be useful in drought monitoring if those data are absence. therefore, remote sensing techniques may provide an efficient technique for drought monitoring. in this study, the values of norm...

This paper presents a new index to determine meteorological drought conditions, the Drought Exceedance Probability Index (DEPI), derived from monthly precipitation time series. Its formulation is simple and undemanding in terms of baseline information requirements. makes DEPI suitable for routine application any climate, similar well-known Standardized Precipitation (SPI). The based on calculat...

Meteorological droughts occur when there is deficiency in rainfall; i.e. rainfall availability below some acclaimed normal values. Hence, the greater challenge to be able obtain suitable methods for assessing drought occurrence, its onset or initiation and termination. Thus, an attempt was made this paper evaluate performance of Standardised Precipitation Index (SPI) Anomaly (SPAI) characterise...