meteorology station Articles
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Development of the homogenized monthly precipitation series during 1910–2014 and its changes in Hunan Province, China
Based on the statistical method and the historical evolution of meteorological stations, the precipitation time series for each station in Hunan Province of China during 1910–2014 are tested for their homogeneity and then adjusted. The missing data caused by war and other reasons at the eight meteorological stations which had records before 1950 is filled by interpolation using adjacent ...
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Surface-based precipitation phase determination methods in hydrological models
We compared solid and liquid precipitation mass output from three categories of common model precipitation phase determination schemes (PPDS) to the recorded precipitation phase in a set of 45 years of 3-hour manual meteorological observations from 19 Swedish meteorological stations. In the first category of rain/snow thresholds, it was found that rain/snow air temperature threshold (ATT) is a ...
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Effects of model segmentation approach on the performance and parameters of the Hydrological Simulation Program – Fortran (HSPF) models
Although models are one of the most powerful tools for watershed management, their effectiveness is limited by prediction uncertainties resulting from not only model input data but also spatial discretization. In this paper, Hydrological Simulation Program – Fortran (HSPF) models were constructed for the Linyi watershed according to three segmentation approaches including model segments ...
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Variability of seasonal and annual rainfall in the River Nile riparian countries and possible linkages to ocean–atmosphere interactions
Variability analyses for the rainfall over the Nile Basin have been confined mostly to sub-basins and the annual mean of the hydroclimatic variable based on observed short-term data from a few meteorological stations. In this paper, long-term country-wide rainfall over the period 1901–2011 was used to assess variability in the seasonal and annual rainfall volumes in all the River Nile ...
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Spatial and temporal variability of seasonal precipitation in Poyang Lake basin and possible links with climate indices
Based on the precipitation data of 21 meteorological stations in Poyang Lake basin, the temporal and spatial variability of seasonal precipitation was analyzed by wavelet analysis method. This study adopted the cross wavelet transform to analyze the correlation between the seasonal precipitation and climate indices in time and frequency scales, discussed the possible links between its ...
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Precipitation trends in Victoria, Australia
Annual rainfall series trends were investigated for more than 100 years of data using two non-parametric trend tests Mann–Kendall (MK) and Sen's slope (Q) for five selected meteorological stations in Victoria, Australia. The annual rainfall time series showed no significant trends for any of the five stations. To assess the sensitivity of trends to the length of the time periods ...
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Testing for nonlinearity in European climatic time series by the method of surrogate data
Using temperature and pressure records from Czech meteorological stations and NCEP=NCAR reanalysis series, we tested for the presence of detectable nonlinearity in univariate and multivariate climatic time series. The method of surrogate data was utilized for nonlinearity detection – results of nonlinear prediction for the original series were compared to the results for series whose nonlinear ...
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Long-term changes of precipitation in Latvia
This study investigated long-term variability and trends in Latvia's annual, seasonal, monthly and daily precipitation using data from 10 meteorological stations for the period 1925–2006 and from station Riga University for the period 1850–2006. The obtained results indicate that during the 20th century a significant increase in precipitation has occurred in the cold season while the warm period ...
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Precipitation and runoff variations in the Yellow River Basin of China
Runoff in the Yellow River (YR) of China is steadily declining due to climate change and human activities. In this study, the basic trend and abrupt changes of precipitation at 63 meteorological stations and runoff as measured at six hydrological stations from 1956 to 2010 are analyzed. Results indicate that 38 stations exhibit negative precipitation trends. These stations are mainly located ...
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Contemporary trends and future changes in freshwater ice conditions: inference from temperature indices
This study examines current trends and future changes in five daily air-temperature derived proxy indices for freshwater ice regimes. The indices are autumn 0 °C isotherm date (autumn I0), spring 0 °C isotherm date (spring I0), winter duration (WD), maximum annual accumulated freezing degree-days (AFDD), and mid-winter thaw frequency. A total of 127 meteorological stations ...
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Air temperature retrieval from remote sensing data based on thermodynamics
A new approach to retrieving air temperature from land surface temperature is presented. The new method is based on thermodynamics. Two important parameters, namely crop water stress index and aerodynamic resistance, were used to build a quantitative relationship between the land surface temperature and the ambient air temperature. The method was applied using MODIS satellite data for a location ...
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All-weather meteorological stations in the Carpathian Mountains - Hungary - Case study
For a development project on the Hungarian hydrometrical network operated by the Hungarian Meteorological Service (OMSZ), 141 new meteorological measuring stations were installed across the country. The all-weater climate stations have to provide reliable and accurate data in all climate conditions, especially in the Carpathian Basin, where climate varies widely. The average annual precipitation ...
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High-resolution analysis of the meteorological fields in the NW mountainous area of Greece
In this work, the nonhydrostatic mesoscale model MM5 was applied over the area of Epirus, Greece, using its nesting capabilities. Specifically, we used a multinest procedure in which the analysis of the inner grid was 1 x 1 km. The model was applied for a day characterised by inversion conditions and stagnation during which the air pollutants' concentrations were expected to increase. The ...
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Survey of natural and artificial radioactivity in Tunisian soils
A study of the natural radioactivity and artificial radioactivity of soils due to gamma ray emitters was performed in Tunisia, as part of the national programme for environment surveillance. Seventeen sites were studied. The determination of radionuclide specific concentrations in the soil samples (0–5 cm) by gamma ray spectrometry showed the following ranges: 40K (93–319 Bq/kg), 226Ra (5–50 ...
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Building an Effective Meteorological Station for Solar PV
The weather has a huge influence on solar PV output. Even intermittent cloud cover can have a dramatic effect on incident solar energy, while other factors can all influence the efficiency of solar cells. The performance ratio of your solar PV plant changes every day – make sure you know why. Read our blog article to learn about: - Why you should care about the weather to optimize plant ...
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Meteorological weather station at river bank of Bosna in Vranduk - Case Study
Our Bosnian distributor ALEM Sistem d.o.o. supplied the hydropower plant of Vranduk with a meteorological station including a Lufft WS600 compact weather sensor for monitoring temperature, relative humidity, air pressure, wind direction and speed, precipitation intensity as well as quantity. This is necessary for the monitoring of meteorological data during the design of the dam. The system is ...
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Spatiotemporal characteristics of extreme precipitation at multiple timescales over Northeast China during 1961–2014
Few studies of extreme precipitation have been conducted in Northeast China, particularly at multi-timescales. We aim to enhance the understanding of changes and variability in extreme precipitation over the past 54 years (1961–2014) in this region. We have investigated the potential relationship among extreme precipitation, climate and agricultural drought focusing on several timescales in ...
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Hydro-Met Station with WTB100 and WS501 in Malaysia - Case Study
Our Malaysian sales partner TCK e-solutions just equipped the Department of Irrigation and Drainage Malaysia with a weather monitoring system for evaluation purposes consisting of a Lufft WTB100 rain gauge a Lufft WS501 all-in-one weather sensor measuring air temperature, relative humidity, air pressure, wind direction, wind speed and radiation an OTT Evaporation Pan as well as an ADCON ...
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Wind Speed Sensor
Wind speed sensor introduction: Mini type three cup wind speed sensor is used cup wind as sensing components, which is rotated by wind and drives magnetic steel,the reed switch is working by magnetic steel sensing, output relative electric pulse signals. It’s applied in meteorological stations, environmental protection, traffic areas and so on. Advantage: Our wind speed sensor, small and ...
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Recent trends in observed temperature and precipitation extremes in the Yangtze River basin, China
The present study is an analysis of the observed extreme temperature and precipitation trends over Yangtze from 1960 to 2002 on the basis of the daily data from 108 meteorological stations. The intention is to identify whether or not the frequency or intensity of extreme events has increased with climate warming over Yangtze River basin in the last 40 years. Both the Mann-Kendall (MK) trend test ...
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