A Temperature Error Correction Method for a Thermometer Screen

Yang, Jie; Liu, Q. Q.

doi:10.12693/aphyspola.132.1301

Cited by 3 publications

(2 citation statements)

References 31 publications

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“…The difference in the resistance of the shields used is especially noticeable on warm sunny days [10]. The graphs present measurements from a series of warm days in early July 2021, namely from 0:00 on 6 July 2021 to 23:59 on 9 July 2021, recorded in minute intervals.…”

Section: Evaluation Of Measured Resultsmentioning

confidence: 99%

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Influence of heated facade air on the results of climate data measurement

Kysela

Ponechal

Rybárik

2022

APP

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Measuring climate data is a lengthy and technically challenging task. To record temperature data, small meteorological stations are located on the facade of the Research Centre building. Due to the position of the meteorological stations, which are mounted directly on the facade of the building, the temperature measurement sensor is not only affected by the solar radiation falling on the sensor housing, but also by the solar radiation falling on the facade of the building. The illuminated surface of the facade gradually heats up during the day and warms the air flowing near the facade. The temperature readings during the day may therefore be significantly distorted. To avoid this phenomenon, better-quality radiation shields have been purchased. The new radiation shield is characterized by a design that resembles eddy currents. The relationship between the shape of the outer and inner spiral is optimized, allowing vortices to form even in virtually windless conditions. In this paper, we would like to point out the differences in the measured air temperature data, according to the radiation shield used and the distance of the temperature sensor from the building facade.

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Section: Evaluation Of Measured Resultsmentioning

confidence: 99%

“…The relationship between the shape of the outer and inner spiral allows vortices to form even in virtually wind- less conditions. This ensures that the air is constantly flowing around the sensor and prevents the stagnant air in the enclosure from overheating [9,10].…”

Section: Radiation Shieldmentioning

confidence: 99%

Influence of heated facade air on the results of climate data measurement

Kysela

Ponechal

Rybárik

2022

APP

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Accuracy of daily extreme air temperatures under natural variations in thermometer screen ventilation

Harrison,

Burt

2024

Atmospheric Science Letters

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Accurate air temperatures underpin environmental research. Most professional meteorological air temperature measurements still expose thermometers within traditional, naturally ventilated screens. Their representation of true air temperature depends on screen airflow, and therefore local winds. Accuracies of daily maximum (Tmax) and minimum (Tmin) air temperatures are assessed by comparison between a naturally ventilated large conventional screen and a co‐located aspirated reference screen. In over 1200 days' data, the naturally ventilated Tmin and Tmax both showed small (median < 0.06°C) cold bias, but, in 1% of cases, warm Tmax bias and cold Tmin bias >|1°C|. The Tmin cold bias is associated with calm clear nights, and the Tmax warm bias events with calm winter days at low sun angles, allowing solar heating of the screen. The prevalence of poor natural ventilation, potentially affecting Tmin and Tmax, is estimated across European sites. Poor ventilation occurred at Tmin for 12% of values, and at Tmax for 4%. Climatological averaging will reduce these effects, but, without corroborating wind data, statistical changes in Tmin or Tmax, including identifying “Tropical Nights” (Tmin > 20°C) or occurrences of winter extremes, may have limited value. Wider adoption of aspirated thermometer screens, with an initial overlap period, will largely eliminate these effects.

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