摘要
对深圳大鹏湾8月16～17日和9月13～15日两次溶解氧骤降事件过程中的相关参数,包括溶解氧、pH、叶绿素a、水温、盐度、风速等的浮标数据进行了分析,发现随着溶解氧的降低,两次事件均出现水温降低和盐度升高的现象。8月的事件中,由于受台风＂启德＂影响风速最高达到20 m/s以上,9月的事件中风速并无显著增加。通过对数据的分析,发现8月份事件的主要原因是台风导致的大风将海水沉积物带到表层,沉积物中的有机物快速消耗表层的溶解氧,致使溶解氧骤降至1 mg/L左右;9月份事件的原因尚不明确,可能是由于受到外海水团的影响。
Two dissolved oxygen reduction events occurred in the Dapeng Bay of Shenzhen on August 16～17 and September 13 ～15, respectively. Buoy parameters related to these events are analyzed in this paper, including dissolved oxygen（DO）, pH, Chlorophyll-a, water temperature, salinity and wind speed. It is discovered that, with the decrease of dissolved oxygen, water temperature and salinity decreased in both the two events. Due to the impact of the Typhoon ＂Kai Tak＂, the wind speed rose to over 20 m/s in the August event, compared with no significant increase in wind speed in the September event. Through data analysis, it is found that the August event was mainly attributed to the typhoon＇s winds which brought sea sediments to the surface, and the organic matters in the sediments rapidly consumed the dissolved oxygen in the surface layer, leading to dissolved oxygen reduction to about 1 mg/L. The reason for the September event was not clear, which may be attributed to the influence of seawater mass.
出处
《海洋技术》
北大核心
2014年第2期24-28,共5页
Ocean Technology
关键词
溶解氧
大鹏湾
南澳
dissolved oxygen
Dapeng Bay
Nan＇ao
