نتایج جستجو برای: dry spells
تعداد نتایج: 94205 فیلتر نتایج به سال:
This study performs a systematic analysis of the recent and future changes dry spells (DS) in Croatia. DS are defined as consecutive sequences days with daily precipitation less than 5 mm precipitation-per-day threshold (DS5). Daily data come from dense national rain gauge network (covering seven regions) span period 1961–2015. The spatial temporal observed mean (MDS5) maximum (MxDS5) seasonal ...
Changes in dry spell duration have been analyzed over China and worldwide. However, the asymmetric response (i.e. skewed distribution) of short- long-duration spells to warming temperature possible mechanisms remain unknown. Here, we investigate this based on daily weather observations during warm-rain season (May-September) 1961–2019 from 1540 quality-controlled stations across Eastern Monsoon...
Four methods of downscaling daily rainfall sequences from general circulation model (GCM) simulations are intercompared over Senegal, using a 13-station network of daily observations during July–September 1961–98. The local scaling method calibrates raw GCM daily rainfall at the closest grid point to a given station so that the climatological distribution of rainfall matches the observed one. T...
weather circulation patterns play a main role in the occurrence of environmental phenomena especially in middle latitude. occurrence of dry and wet spells is in relation to synoptical system repetitions and types of weather. in this research first by using of standard precipitation index (spi), extensive droughts in the province were identified. then by using principal component analysis (pca) ...
Different sets of dry spell length such as complete series, monthly maximum, seasonal and annual maximum are applied modeled with different probability distribution functions (such Gumbel Max, generalized extreme value, Log-Logistic, logistic, inverse Gaussian, Log-Pearson 3, Pareto) to recognize in which duration, spells cause drought. The drought situation temporal analysis the North Iraq reg...
When fruit set and rainfall are sufficient, grape yields in Arkansas are high, but rain is not always sufficient in Arkansas. There is enough, in terms of inches, but it often comes at the wrong times. Records during the past 20 years have shown that in all but 3 years in Northwest Arkansas, there have been brief dry spells during the growing season that lasted for at least two or three weeks. ...
Warmer and drier climatic conditions are projected for the 21st century; however, the role played by extreme climatic events on forest vulnerability is still little understood. For example, more severe droughts and heat waves could threaten quaternary relict tree refugia such as Circum-Mediterranean fir forests (CMFF). Using tree-ring data and a process-based model, we characterized the major c...
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