Daily values of weather observations: Porvoo Kalbådagrund

The data includes computational and measured daily values from the Finnish Meteorological Institute's weather observation station. The calculated values are the daily average air temperature and the daily precipitation. Measured values include minimum and maximum air temperature, minimum ground temperature and snow depth. The extremes of air temperature are measured at 06 and 18 UTC and the minimum ground temperature at 06 UTC. These represent extreme values over the previous 12-hour period (18-06 and 06-18 UTC).本数据集涵盖芬兰气象研究所（Finnish Meteorological Institute）气象观测站的逐日计算值与实测值。其中计算值为逐日平均气温与逐日降水量；实测值包含最低气温、最高气温、最低地面温度及积雪深度。气温极值的观测时刻为协调世界时（UTC）06时与18时，最低地面温度的观测时刻为协调世界时06时，上述极值均对应此前12小时观测时段（即协调世界时18时至06时、06时至18时）的统计结果。