Maximum, Minimum, and Daily Air Temperature Range in Orchards: What Do Observations Reveal?

Atmosphere

Ana Firanj Sremac¹  Branislava Lalic¹  Joan Cuxart²  Milena Marcic³ 

[1] Department of Field and Vegetable Crops, Faculty of Agriculture, University of Novi Sad, Trg Dositeja Obradovica 8, 21000 Novi Sad, Serbia;Department of Physics, University of the Balearic Islands, 07122 Palma, Majorca, Spain;Forecasting and Reporting Service for Plant Protection of the Republic of Serbia, 21000 Novi Sad, Serbia;

关键词: air temperature;    daily temperature range;    orchard micrometeorology;    in-situ measurements;    ERA5-Land reanalysis data;   

DOI  :  10.3390/atmos12101279

来源: DOAJ

【 摘 要 】

This study was designed to better understand vegetation’s impact on air maximum (T_max), minimum (T_min), and daily temperature range (DTR), as well as seasonality and variability. We selected a flat, under synoptic-scale, northern Serbian region with an operational network of automated weather stations (AWS) for the study. Data were collected directly from the eighteen AWSs placed in the orchard canopy during 2013–2018. Meteorological data, plant phenological data in the form of the BBCH scale, and orchards’ soil characteristics data were collected. Environmental factors influencing the temperature were classified as static (slow or unchangeable) and dynamic (fast-changing). The impact of both factors on maximum, minimum, and daily temperature range and its variability were analyzed. Results show that static factors (like soil texture) affect the annual variation of T_max, T_min, and DTR rather than its variability over the season. The dynamic factors, mainly coming from the plant’s phenology, substantially affected the seasonal variability of these variables. Studies like this suffer from missing data and sparse spatial coverage by the AWS network. Therefore, the alternatives of orchard micrometeorological data, nearest climatological station, and ERA5-Land reanalysis data are tested. Both data sets showcased limitations in their applicability, while reanalysis data deviated more from the in-situ measurements, both seasonally and regionally.

【 授权许可】

Unknown