نتایج جستجو برای: spei
تعداد نتایج: 542 فیلتر نتایج به سال:
تبخیر یکی از مؤلفههای مهم و تاثیرگذار در برنامهریزی و مدیریت منابع آب در مناطق خشک و نیمهخشک میباشد و برآورد آن در اقلیمهای مختلف، بهعنوان یکی از مهمترین عوامل اثرگذار جوی، از اهمیت ویژهای در برنامهریزی و مدیریت منابع آب در بخش کشاورزی، تعیین الگوی کشت و مدیریت صحیح مخازن آبی برخوردار است. یکی از روشهای بررسی تغییرات تبخیر و پیشبینی آن، مدلهای سری زمانی با نام عمومی مدلهای ARIMA می...
Site-specific studies are required to identify suitable drought indices (DIs) for assessing and predicting drought-related impacts. This study presents a benchmark of eight DIs 19 large-scale climate (CIs) monitor agricultural in Argentina. First, the link between CIs was investigated at departmental-administrative level different temporal scales. Then, effectiveness explaining variability crop...
Drought is one of the major global natural disasters, and appropriate monitoring systems are essential to reveal drought trends. In this regard, deep learning a very promising approach for characterizing non-linear nature factors. We used multi-source remote sensing data such as Moderate Resolution Imaging Spectroradiometer (MODIS) Climate Hazards Group Infrared Precipitation with Station (CHIR...
Droughts are complex and gradually evolving conditions of extreme water deficits which can compromise livelihoods ecological integrity, especially in fragile arid semi-arid regions that depend on rainfed farming, such as Kitui West south-eastern Kenya. Against the background low ground-station density, 10 gridded rainfall products four temperature were used to generate an ensemble 40 calculatio...
A nationwide laboratory-based surveillance study of invasive S. pyogenes infections was conducted in Germany. Invasive isolates (n = 719) were obtained between 2009 and 2014. Most isolates were obtained from blood (92.1%). The proportions of isolates from cerebrospinal fluid, pleural fluid, synovial fluid and peritoneal fluid were 3.9%, 1.8%, 1.7% and 0.6%, respectively. The most common emm typ...
Twenty clinical Pseudomonas aeruginosa isolates recovered from patients admitted to The General Hospital in Ismailia Governorate (Egypt) were examined in this study. We analysed P. aeruginosa ATCC 9027 (as a control strain) and 19 of the isolates after digestion with SpeI restriction endonuclease. After this we conducted a pulsed-field gel electrophoresis (PFGE) and typed the obtained 10 unique...
We have investigated the ability of a large number of restriction enzymes to digest non-canonically hemimethylated DNA at high enzyme-to-substrate ratios. A single-stranded unmethylated phagemid was used as a template to complete synthesis of the second strand using 5-methyl-dCTP to substitute for all the deoxycytosine residues. A fragment of this double-stranded hemimethylated DNA which contai...
Studying the impact of regional or seasonal drought on vegetation water-use efficiency (WUE) can identify an effective theoretical basis by which cope with future climate change. Based remote sensing data and grid data, in this study, we calculated ecosystem WUE standardized precipitation evapotranspiration index (SPEI), analyzed temporal spatial divergence WUE, explored relationship between Lo...
Centennial drought characteristics in Equatorial East Africa (EEA) is investigated using the Standardized Precipitation Evapotranspiration Index (SPEI) derived from Climatic Research Unit (CRU) dataset. The spatial pattern of distribution, as well duration, intensity and frequency, are analyzed for SPEI at a 3-month timescale March-April-May (MAM) season. Rotated Empirical Orthogonal Function (...
Abstract Drought with its occurrence and manifestations at all levels of the natural components, yields both direct indirect negative effects, on ecological systems, water resources, social, as well economic aspects life. Therefore, any analysis that concerns this phenomenon, must be carried out a multi-scalar level, addressing manifestation (meteorological, hydrological, hydrogeological drough...
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