In our research, the role and importance of the location of agrometeorological temperature measurements were studied. Our measurements aimed to find out how the measurement site influences the temperature data and thus the agrometeorological information that can be used for precision crop production, such as daily minimum, maximum, mean values (monthly averages). We examined temperature heterogeneity at micro (1-100 m scale) and meso (1-10 km scale) horizontal scales. Temperature data of year 2022, measured by 7 high-precision HOBO Pro v2 U23-002 temperature/humidity data loggers (accuracy: ±0.21°C, resolution: 0.02°C/, T90%: 5 min) installed in the close surroundings of a town (Szarvas) in the Hungarian Great Plain were evaluated. Data from the Szarvas automatic weather station of the Hungarian Meteorological Service were also used for the analyses. The monthly mean temperature on mesoscale was most consistent in November and December, with a maximum difference of only 0.1°C. This also indicates a very high accuracy of our measurements. The largest heterogeneity was found from March to August, with differences typically 0.3-0.4°C. In case of minimum temperature large horizontal heterogeneity was detected (0.2-1.4°C). Microscale variations in maximum temperature were significant in the spring and summer seasons (in monthly averages 0.6-1°C, 1.2°C in August. Based on our results, recommendations were made for the selection of sites for agrometeorological measurements and the positioning of thermometers.

temperature measurement, location, microclimate, mesoclimate, site selection

agronomy

Presentation: poster