نتایج جستجو برای: drought trend

تعداد نتایج: 152148  

Journal: :Singapore Journal of Tropical Geography 2023

Droughts affect human well-being and the economy of countries across world. Understanding long-term evolution droughts within a particular region will help in drought mitigation adaptation plans, thereby reducing impact on environment. This study examined multidecadal trends hydrological at two stations along River Niger using 3-month, 6-month, annual time scales. Hydrological events were ident...

A Aeeni H Marofi H Tabari S Maroufi,

Drought is one of the most serious problems arising for human societies and ecosystems from climatevariability. This phenomenon causes billions of dollars in global damages annually and affects morepeople than any other form of natural disasters.In this study, the trends of rainfall and meteorological drought time series were investigated at tenstations located in the east of Iran for the perio...

Journal: Desert 2011
A R Massah Bavani M T Dastorani M. H. Rahimian S Poormohammadi

This research studies the potential impact of climate change on future trend and changes of two well known drought indicators namely RDI and SPI in Yazd meteorological station, in central part of Iran. For this purpose, data of HadCM3 model that were resulted from GCM-runs based on the IPCC-SRES scenarios of A2 and B2 were acquired and analyzed for projection of daily Tmin, Tmax and precipitati...

Due to the undeniable impact of drought on human life, careful study of this phenomenon seems essential. The purpose of this study is to evaluate the accuracy of Geostatistical methods in preparing the drought severity map in the Malayer plain using the Standardized Water-Level Index (SWI) and analyze the trend of the Piezometric well. The results based on RMSE and MAE criteria showed that amon...

2015
F. Yuan Y. Y. San Y. Li M. Ma L. Ren C. Zhao Y. Liu X. Yang S. Jiang

In this study, a framework to project the potential future climate change impacts on extreme hydrological drought events in the Weihe River basin in North China is presented. This framework includes a largescale hydrological model driven by climate outputs from a regional climate model for historical streamflow simulations and future streamflow projections, and models for univariate drought ass...

2017
Alessandra Fracasso Eugenio Magnanini Adriano Marocco Stefano Amaducci

Plant growth and productivity are strongly affected by limited water availability in drought prone environments. The current climate change scenario, characterized by long periods without precipitations followed by short but intense rainfall, forces plants to implement different strategies to cope with drought stress. Understanding how plants use water during periods of limited water availabili...

2015
Chen-Feng Yeh Jinge Wang Hsin-Fu Yeh Cheng-Haw Lee Marc A. Rosen

In recent years, global climate change has altered precipitation patterns, causing uneven spatial and temporal distribution of precipitation that gradually induces precipitation polarization phenomena. Taiwan is located in the subtropical climate zone, with distinct wet and dry seasons, which makes the polarization phenomenon more obvious; this has also led to a large difference between river f...

2018
Ellen E. Pflug Nina Buchmann Rolf T. W. Siegwolf Marcus Schaub Andreas Rigling Matthias Arend

Drought is a major environmental constraint to trees, causing severe stress and thus adversely affecting their functional integrity. European beech (Fagus sylvatica L.) is a key species in mesic forests that is commonly expected to suffer in a future climate with more intense and frequent droughts. Here, we assessed the seasonal response of leaf physiological characteristics of beech saplings t...

2011
E. Ozelkan I. Papila D. Z. Uca Avci M. KARAMAN

Today, many places of different locations on Earth especially semi-arid areas face the risk of desertification due to severe drought. However, the very basic data required for the analysis is unavailable for the regions without a meteorological station. In this case, land surface temperature (LST) is derived from a thermal band as an alternative meteorological station’s data. In this research, ...

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