Faculty of Engineering, Department of Civil Engineering, Geospatial Information Science Research Centre, University Putra Malaysia, UPM 43400, Serdang, Selangor, Malaysia.
Environ Monit Assess. 2013 May;185(5):3977-91. doi: 10.1007/s10661-012-2843-2. Epub 2012 Aug 29.
A study was conducted to investigate the influence of Asian monsoon on chlorophyll-a (Chl-a) content in Sabah waters and to identify the related oceanographic conditions that caused phytoplankton blooms at the eastern and western coasts of Sabah, Malaysia. A series of remote sensing measurements including surface Chl-a, sea surface temperature, sea surface height anomaly, wind speed, wind stress curl, and Ekman pumping were analyzed to study the oceanographic conditions that lead to large-scale nutrients enrichment in the surface layer. The results showed that the Chl-a content increased at the northwest coast from December to April due to strong northeasterly wind and coastal upwelling in Kota Kinabalu water. The southwest coast (Labuan water) maintained high concentrations throughout the year due to the effect of Padas River discharge during the rainy season and the changing direction of Baram River plume during the northeast monsoon (NEM). However, with the continuous supply of nutrients from the upwelling area, the high Chl-a batches were maintained at the offshore water off Labuan for a longer time during NEM. On the other side, the northeast coast illustrated a high Chl-a in Sandakan water during NEM, whereas the northern tip off Kudat did not show a pronounced change throughout the year. The southeast coast (Tawau water) was highly influenced by the direction of the surface water transport between the Sulu and Sulawesi Seas and the prevailing surface currents. The study demonstrates the presence of seasonal phytoplankton blooms in Sabah waters which will aid in forecasting the possible biological response and could further assist in marine resource managements.
一项研究旨在调查亚洲季风对沙巴海域叶绿素-a（Chl-a）含量的影响，并确定导致马来西亚沙巴东西海岸浮游植物大量繁殖的相关海洋条件。本研究分析了一系列遥感测量数据，包括海面 Chl-a、海面温度、海面高度异常、风速、风应力旋度和 Ekman 抽吸，以研究导致表层大规模营养物质富化的海洋条件。结果表明，由于北东向强风和哥打京那巴鲁水域的沿岸上升流，12 月至 4 月西北海岸的 Chl-a 含量增加。由于雨季巴当河的排放以及东北季风期间巴兰河羽流方向的变化，西南海岸（拉布安水域）全年保持高浓度。然而，随着上升流区营养物质的不断供应，在东北季风期间，拉布安外海的高 Chl-a 批次维持时间更长。另一方面，东北海岸在东北季风期间在山打根水域表现出高 Chl-a，而古达北端全年都没有明显变化。东南海岸（斗湖水域）受苏禄海和苏拉威西海之间的地表水输送方向和盛行的表层流的强烈影响。该研究表明沙巴海域存在季节性浮游植物大量繁殖，这将有助于预测可能的生物响应，并进一步协助海洋资源管理。
