نتایج جستجو برای: monthly variations

تعداد نتایج: 218330  

Journal: :Earth and Space Science 2022

Long-term variations in maximum gust speeds have been analyzed using wind measurements recorded at St Mary’s, Isles of Scilly, UK, and possible drivers recent changes investigated. A rigorous homogenization procedure has applied to the records remove discontinuities mainly caused by non-climatic changes. Trends magnitude homogenized annual monthly subsequently estimated. significant (p < 0.10) ...

Journal: :Eng 2021

Safe drinking water is among the most important environmental as well health challenges facing Egypt. Groundwater from aquifer of Nile valley in Upper Egypt accounts for about 40% overall source water. Nearly, all rural residents rely on groundwater Irrigation main recharge Valley. Moreover, nitrate fertilizer utilization has risen significantly due to requirement further agricultural productio...

2014
Ann Kristin Knudsen Jens Christoffer Skogen

Background: Aggregated measures are often employed when prevalence, risk factors and consequences of alcohol use in the population are monitored. In order to avoid time-dependent bias in aggregated measures, reference periods which assess typical alcohol consumption are considered superior to reference periods assessing recent or current alcohol consumption. It is not known whether monthly vari...

2012
En-Zhi Jia Zhen-Xia Xu Hong-Zhou Cai Chang–Yan Guo Li Li Tie-Bing Zhu Lian-Sheng Wang Ke-Jiang Cao Wen-Zhu Ma Zhi-Jian Yang

OBJECTIVE The objective of this study was to explore the time distribution patterns of the onset of chest pain in subjects with acute ST-elevation myocardial infarction in a Chinese population. METHODS A total of 1467 patients with acute ST-elevation myocardial infarction were enrolled from 2003 to 2010. The hourly, daily, monthly, seasonal and day-of-week fluctuations in the prevalence of ac...

2017
Lucyna Samek Z. Stegowski L. Furman K. Styszko K. Szramowiat J. Fiedor

In industry areas of Poland such as Silesia or urban sites like Krakow and some other cities, the levels of pollutants frequently breach air quality standards. Particulate matter (PM) is the most important constituent of atmospheric pollution. Beginning on 1st February 2014 until 31st January 2015, the samples of fine particulate matter PM2.5 (aerodynamic diameter of particles less than or equa...

2008
D. J. Erickson R. T. Mills J. Gregg T. J. Blasing F. M. Hoffman R. J. Andres M. Devries Z. Zhu S. R. Kawa

[1] Monthly estimates of the global emissions of anthropogenic CO2 are presented. Approximating the seasonal CO2 emission cycle using a 2-harmonic Fourier series with coefficients as a function of latitude, the annual fluxes are decomposed into monthly flux estimates based on data for the United States and applied globally. These monthly anthropogenic CO2 flux estimates are then used to model a...

2011
H. F. Medeiros V. N. Solferini

Five Indian geographical populations of Drosophila melanogaster were analyzed for their genetic divergence of life history traits. Clinal variations were observed for body weight, ovariole number, and four pre-life history traits (i.e., fecundity, hatchability, viability, and duration of development). Rearing populations at different growth temperatures shows that the variations among wild flie...

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