A COMPARATIVE ANALYSIS OF METEOROLOGICAL PARAMETERS AT OFFSHORE,NEARSHORE,AND INLAND STATIONS IN MAOMING

ZHAN Guowei; HUANG Huijun; ZHOU Mingsen; TAN Lunchan; LI Zhijie; LIN Yanting

doi:10.16032/j.issn.1004-4965.2023.077

Abstract：In this study,we conducted a comparative analysis of meteorological parameters,including wind speed,wind direction,temperature,and humidity,at three stations in Maoming:the offshore marine buoy station,the nearshore marine platform station,and the inland Dianbai reference station.One year of observational data was collected for analysis.Our results indicate that:(1)The dominant wind direction of the three stations was bimodal throughout the year,but the dominant wind direction differed,with the marine buoy and platform stations experiencing mainly northeast winds and the Dianbai reference station experiencing mainly northeast and southeast winds.The minimum monthly mean wind speed of the three sites was in August.For the maximum value,the marine buoy station was in January,the marine platform station was in November,and the Dianbai reference station was in April.(2)The diurnal variation of the annual mean temperature at the Dianbai reference station and the marine platform station followed a"one valley and one peak"pattern.There was a low value at the marine buoy station in the morning,but the peak value was not obvious.The average monthly temperature of the three stations increased in the first half of the year and decreased in the second half.The marine buoy stations,which were further south in latitude and least affected by land,had the longest duration of high temperatures throughout the year.(3)The annual average diurnal variation of humidity followed a"one peak and one valley"pattern at all three sites,with high humidity in the morning and evening and lower levels from noon to afternoon.The Dianbai reference station had the largest diurnal variation amplitude,followed by the marine platform station,and the marine buoy station had the smallest.Monthly average humidity was relatively high from February to August,with the lowest levels occurring from November to December when the Northeast monsoon prevailed.The ocean buoy stations had the longest periods of high humidity,while the offshore platform showed a noticeable low-value area at noon and in the afternoon due to land influence.(4)Because of the underlying surface,the Dianbai reference station had the highest annual average diurnal range of wind speed,temperature,and humidity,followed by the marine platform station,and the marine buoy station had the lowest value.