نتایج جستجو برای: daily and monthly scales
تعداد نتایج: 16847680 فیلتر نتایج به سال:
Using radiosonde data from 50 stations for 19731990, we quantify relationships between surface air temperature (Ts) and precipitable water vapor (W) for different time scales. Monthly _mean observations are fairly well described b 7an equation of the form In W = A + B Ts, but the coefficients _4 and B depend on the Ts range considered. At high T•, the relationship is poor. This relationship and...
It is critical that evapotranspiration (ET) be quantified accurately so that scientists can evaluate the effects of land management and global change on water availability, streamflow, nutrient and sediment loading, and ecosystem productivity in watersheds. The objective of this study was to derive a new semi-empirical ET modeled using a dimension analysis method that could be used to estimate ...
Abstract In this paper, we describe and analyze two datasets entitled “Homogenised monthly daily temperature precipitation time series in China during 1960–2021” Greece 1960–2010”. These provide the homogenised mean (TG), minimum (TN), maximum (TX) (RR) records since 1960 at 366 stations 56 Greece. The are available Science Data Bank repository can be downloaded from https://doi.org/10.57760/sc...
This note examines the weak-form market efficiency of the Australian stock market. Daily returns from 6 January 1958 to 12 April 2006 and monthly returns from February 1875 to December 2005 are examined for random walks using serial correlation coefficient and runs tests, Augmented Dickey-Fuller, Phillips-Perron and Kwiatkowski, Phillips, Schmidt and Shin unit root tests and multiple variance r...
among the low–dimensional allotropes of carbon, nanotubes and graphene have attracted very much attention from nano–science and nanotechnology specialists. they have been proposed as building blocks in nanometer device engineering. however, these structures are not defect–free. in this thesis, we focused on defective carbon nanotubes and graphene, and studied the effect of couple of very common...
The aim of this study was to investigate the status of dust storms in Kermanshah province, Iran, using climatic and remote sensing data. Dusty days recorded at 12 meteorological stations were obtained and analyzed at monthly and yearly scales from 1990 to 2011 and then the relationship of visibility data (0.77) with rainfall, wind direction and speed parameters. The results of MODIS dust mappin...
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