A calibration facility for automatic weather stations

Lopardo, G.; Bellagarda, Simone; Bertiglia, Fabio; Merlone, A.; Roggero, Guido; Jandrić, N.

doi:10.1002/met.1514

Cited by 17 publications

(16 citation statements)

References 6 publications

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“…Concerning both temperature sensors, the contribution of the calibration uncertainty included also: the resolution of t AWS (0.028 °C), vertical uniformity (0.021 °C), axial uniformity (0.028 °C), and stability (0.01 °C) of the chamber, calibration of t C (0.011 °C), and nanovoltmeter readings (0.004 °C) (Lopardo et al ., ).…”

Section: Methodsmentioning

confidence: 97%

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Vineyard diseases detection: a case study on the influence of weather instruments' calibration and positioning

Sanna

Calvo

Deboli

et al. 2017

Meteorological Applications

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Weather-monitoring instruments installed on hill and mountain agricultural sites are often forced into non-ideal positioning due to slopes, tree proximity and other obstacles such as rivers and rocks that primarily affect relative humidity, temperature and solar radiation. Moreover, data from these weather stations do not take into account the measurement uncertainties related to these influences. The aim of this study is to investigate weather instruments' calibration and positioning in a vineyard located in the Monferrato region in northwestern Italy. Meteorological data from two weather stations were analysed metrologically in terms of the evaluation of calibration uncertainty and traceability to the International System of Units (SI), and using a statistical test, with the purpose of evaluating primarily the effect of the sensors' calibration and positioning on sloping hills. To understand these influences better, and in order to improve vineyard disease predictions reducing the use of chemicals in agriculture, the data recorded from the weather stations were included with the calibration uncertainties and used as inputs in an epidemiological forecasting model. The inclusion of the calibration uncertainties and positioning contribution affected disease prediction by up to five days; this can be explained by the effect of the tree canopy's spatial arrangement, which tends to alter the vineyard's microclimate.

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Section: Methodsmentioning

confidence: 97%

“…The air temperature and RH sensors were calibrated using the ‘EDIE – Earth Dynamics Investigation Experiment’ facility (Lopardo et al ., ), developed under the European ENV07 MeteoMet project (Merlone et al ., ).…”

Section: Methodsmentioning

confidence: 99%

Vineyard diseases detection: a case study on the influence of weather instruments' calibration and positioning

Sanna

Calvo

Deboli

et al. 2017

Meteorological Applications

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“…The meteorological instruments were calibrated by means of procedures defined ad hoc. The air T and RH sensors were calibrated using the 'EDIE -earth dynamics investigation experiment' device (Lopardo et al 2015), developed under the European ENV07 MeteoMet project (Merlone et al 2015) equipped with a Pt100 PRT (Platinum Resistance Thermometers, 5615-6-Fluke, Fluke Italia Srl, Brugherio, Italy), calibrated at the fixed points of the International Temperature Scale (ITS-90), used as a reference sensor.…”

Section: Methodsmentioning

confidence: 99%

Variability of tomato in protected environment in response to meteorological parameters

Sanna¹,

Deboli²,

Calvo³

2018

PLANT SOIL ENVIRON

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Solar radiation (SR) is an important parameter for plants because it provides the energy for photosynthesis and modulates growth and development in response to environmental conditions. Plants have the ability to monitor intensity, spectral distribution, direction and daily duration of the direct and incident light (Li and Yang 2015).When operating in protected cultivation, the amount and the spectral distribution of SR inside the cultivation environment undergo modifications that depend on the type of the cover used. The productivity of a protected crop is highly correlated to the amount of electromagnetic radiation received, which in turn depends on the amount of ultraviolet (UV), visible (photosynthetically active radiation (PAR)), and infrared (IR) radiation transmitted through the cover material of these structures (Krizek 2004).Studies aimed at quantifying the effects of UV on crop quality led to unclear results. Indeed, data take into account some aspects of the problem separately, such as physiological, production or quality (Bacci et al. 1999, Castagna et al. 2013. Particularly, the increase in UV-B (280-315 nm) is a potential risk to the physiology and the plants growth, as it can damage DNA, proteins, cell membranes, and affect the physiologic function (Fedina and Velitchkova 2009 An experimental site for the measurement of meteorological parameters in protected environment and the evaluation of the tomato cultivar variability is presented in this paper. The site was equipped with cultivation structures with different covering materials and calibrated sensors traceable to the International System of Units. The microclimate conditions were monitored by sensors for solar radiation (from 290 nm to 2800 nm), air temperature (from -10°C to 40°C) and relative humidity (from 10% RH to 98% RH) inside and outside the tunnels. Specific procedures were used to calibrate the instruments. The following aspects were evaluated: microclimate and solar radiation within different cultivations; morphological observations of the tomatoes in response to the different environments; optical and radiometric properties of the films used as covering material. High temperatures recorded (over 40°C) changed the transmissive feature of the films and consequently affected the growth, anthesis, leaf area index and fruit setting of tomatoes.

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“…In Lopardo et al (), EDIE1's specifications are described and its characterization is presented. The nominal ranges of the chamber are: absolute pressure from 50 to 110 kPa and temperature from −25 to 50 °C.…”

Section: Calibration Chambermentioning

confidence: 99%

Arctic metrology: calibration of radiosondes ground check sensors in Ny‐Ålesund

Musacchio

Bellagarda

Maturilli

et al. 2015

Meteorological Applications

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ABSTRACT:The Arctic research village of Ny-Ålesund (79 ∘ N, 12 ∘ E) on the Spitsbergen island of Svalbard archipelago, with its logistics and infrastructure, provides a unique access to the Arctic environment. Among the several international environmental and climate monitoring programmes constantly running there, the Global Climate Observing System (GCOS) Reference Upper Air Network (GRUAN) has established one of its stations at the Alfred Wegener Institute observatory. Calibration of sensors and measurement traceability are fundamental aspects of climate observations, as requested by the GRUAN measurement procedures. In the framework of the MeteoMet project, a transportable climatic chamber for the calibrations of air temperature and pressure sensors was studied and manufactured. In June 2014, a calibration campaign involved the transport and use of one of those systems in the Ny-Ålesund GRUAN station. The result of the campaign has been the complete calibration of temperature and pressure sensors for radiosonde pre-launch ground checks. The resulting calibration curves were obtained with lower uncertainties and more robust characterization of the sensors, with respect to the usual procedures adopted. Given the opportunity of the calibration device operating already in place and the presence of the metrology staff, the calibration was extended to the sensors equipping the Amundsen-Nobile Climate Change Tower. The present study reports on the 'Arctic metrology 2014' campaign and the plans for the establishment of a permanent laboratory for metrology in Ny-Ålesund. The aim is to address the measurement traceability needs arising from the multidisciplinary measurements made by the scientific community operating there.

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A calibration facility for automatic weather stations

Cited by 17 publications

References 6 publications

Vineyard diseases detection: a case study on the influence of weather instruments' calibration and positioning

Vineyard diseases detection: a case study on the influence of weather instruments' calibration and positioning

Variability of tomato in protected environment in response to meteorological parameters

Arctic metrology: calibration of radiosondes ground check sensors in Ny‐Ålesund

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