title: Computational fluid dynamics analysis and experimental study of a low measurement error temperature sensor used in climate observation.
abstract: To improve the air temperature observation accuracy, a low measurement error temperature sensor is proposed. A computational fluid dynamics (CFD) method is implemented to obtain temperature errors under various environmental conditions. Then, a temperature error correction equation is obtained by fitting the CFD results using a genetic algorithm method. The low measurement error temperature sensor, a naturally ventilated radiation shield, a thermometer screen, and an aspirated temperature measurement platform are characterized in the same environment to conduct the intercomparison. The aspirated platform served as an air temperature reference. The mean temperature errors of the naturally ventilated radiation shield and the thermometer screen are 0.74 °C and 0.37 °C, respectively. In contrast, the mean temperature error of the low measurement error temperature sensor is 0.11 °C. The mean absolute error and the root mean square error between the corrected results and the measured results are 0.008 °C and 0.01 °C, respectively. The correction equation allows the temperature error of the low measurement error temperature sensor to be reduced by approximately 93.8%. The low measurement error temperature sensor proposed in this research may be helpful to provide a relatively accurate air temperature result.
authors.affiliation: Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing 210044, China.
authors.forename: Jie
authors.identifier: 0000000201532071
authors.initials: J
authors.lastname: Yang
authors.affiliation: Jiangsu Key Laboratory of Meteorological Observation and Information Processing, Nanjing 210044, China.
authors.forename: Qingquan
authors.initials: Q
authors.lastname: Liu
authors.affiliation: Key Laboratory of MEMS of the Ministry of Education, Nanjing 210009, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Dai