Weather station

About: Weather station is a research topic. Over the lifetime, 1789 publications have been published within this topic receiving 42864 citations. The topic is also known as: meteorological station & meteorological observation post.

Machine carries weather station device suitable for unmanned aerial vehicle

Abstract: The utility model discloses a machine carries weather station device suitable for unmanned aerial vehicle, unmanned aerial vehicle are many rotors of cavity formula unmanned aerial vehicle, and the device includes weather station shell body, weather station base, power module, transmission module, control module, and the weather station shell body is fixed in unmanned aerial vehicle cavity position, and its inner wall both sides are equipped with the guide rail, gear rotating band carry -over bar in the transmission module slides on the guide rail, weather station base both ends respectively with rack fixed connection, upper and lower both sides are equipped with the meteorological monitoring sensor, control module returns the data of gathering to ground through wireless transmission module in real time During the operation, unmanned aerial vehicle hovers, and the machine carries weather station device adjustment rack and stops the different positions on the guide rail, finally obtains the not meteorological parameter of co -altitude of unmanned aerial vehicle fuselage vertical space through the meteorological monitoring sensor The utility model discloses the wind field that can reduce unmanned aerial vehicle flight formation has monitoring precision height, characteristics easy and simple to handle nimble to the influence that the weather station recorded data

Generation of an Annual Typical Daily Wind Speed for Heights Equal and Less than 10 meters for Urban Armidale NSW, Australia

Abstract: Wind has a very intermittent nature, its behaviour and speed are directly affected by several factors, specifically the nature of the environment and the height that wind blows at. Wind behaviour at urban large city areas and urban suburban areas is completely different than such behaviour at open terrain and flat unobstructed areas, wind turns to be more disturbed and turbulent and wind speed is reduced due to the existence of several obstructions, mostly buildings either single storey or medium rise or high rise buildings in addition to trees. As well, the height at which wind is blowing, the lower height the more disturbed wind the less wind speed, such effect is maximised in urban areas and near to the ground level. This paper aims to estimate and generate, in urban Armidale NSW, Australia, an annual typical daily wind speed for heights equal and less than 10m. A numerical method is applied to calculate such wind speed at urban Armidale at various heights (10, 9, 8, 7, 6, 5 & 4) m utilising an already previously generated typical wind speed reference year (TRY) of Armidale based on historical meteorological wind speed records measured at 10m height at Armidale's Airport Weather Station (AWS) over a period of 20 years (1994 to 2013). Achieving such a database of typical reference year of daily wind speed at heights equal and less than 10 meters in (m/s) is an added value to the micro-scale wind energy generation systems, ranges from 0.5 kW to 10 kW, as such systems involves micro-scale wind turbines would be operating at heights considered at this study.

Impacts of Agricultural Expansion on Irrigation Water Requirements in Taita Hills, Kenya

Abstract: The presented work aims to evaluate the impacts of agricultural expansion on irrigation water requirements in Taita Hills, SE-Kenya. The first procedure of this research consists in implementing and calibrating an Evapotraspiration (ET) model for the study area. The ET is an important component of the hydrological cycle and an accurate quantification of such component is crucial for the design, operation and managment of irrigation systems. Three temperature based ET models are evaluated, namely the Hargreaves, the Thornthwaite and the Blaney-Criddle, given that these are the most recommended approaches when only air temperature data are available at weather stations. To overcome the insufficient data retrieved from ground stations, remote sensing land surface temperature data are used as input for the models. One weather station with complete climate datasets is used to calibrate the selected model using as reference the FAO-56 Penman -Monteith method. Simultaneously, future land use scenarios are simulated using a Land Use and Land Cover Change (LUCC) model. Synthetic weather datasets (temperature and precipitation) are generated using a Monte Carlo simulation. Finally, the ET model and the LUCC model are integrated into a modeling framework in order to delineate Irrigation Water Requirement (IW) scenarios. The simulations indicate that throughout the next 20 years the low availability of space in highlands will drive agricultural expansion to areas with higher IWR in the foothills. However, climate changes predicted by GCMs will likely decrease IWR when compared with scenarios using the same temperature and precipitation averages as in the historical dataset.

A Discussion of the Wave Records Obtained at Weather Station Papa, Pacific Ocean

Abstract: Some statistical characteristics of measured deepwater data obtained at weather station Papa during the five most severe storms December 1968 - January 1971 are compared with theoretical values. A statistical analysis of the probability distribution of wave heights and periods was obtained from a computer algorithm, and statistical parameter compared to Rayleigh distributuions. Other comparisons are made with Tucher's method and with Bretschneider's distribution function.