近20a南海赤潮的时空分布特征及原因分析

Analysis on spatial and temporal distribution and cause of red tides over past 20 years in South China Sea

收集整理了自1980~2004年的南海历次赤潮事件,并对这些赤潮事件在时间和空间的分布特征以及赤潮持续时间长度的变化特征进行了分析;探讨了形成南海赤潮时空分布特征和持续时间长度变化的可能原因。文章认为:赤潮在年度和月份分布不均的原因主要是气候差异以及各月份水文气象要素的主要演变特征不同;赤潮持续时间延长的原因与南海区气候转暖和广东近岸海域水质变差有关。研究发现赤潮事件的月份分布和赤潮持续时间长度存在历史性变异,有关现象值得管理部门和学术界的注意,而其中原因更有待进一步研究。

All of the red tide incidents in South China Sea since 1980 ~2004,the spatial and temporal distribution of the events,and the change characteristics of the average duration of the red tides were analyzed.The discusson of the possible causes of formation and spatial and temporal distribution of red tides was made.According to the date,the main reasons of the uneven distribution of the red tide in months or years are different in climate and monthly evolution characteristics of the main hydro-meteorological e...