热带太平洋西部及赤道暖水区的初级生产力

Primary production in the western tropical Pacific and equatorial warm waters

描述了对热带太平洋西部 (1 991年 1 1月WOCE调查 )及赤道暖水区 (1 992年1 1月至 1 993年 2月的TOGA -COARE调查 )的叶绿素a分布和初级生产力 (C) ,及其与理化环境的关系 .西部海域叶绿素a平均总量达 1 9 79mg/m2 ,暖水区为 2 1 68mg/m2 ;暖水区的潜在初级生产量高于西部海域 ,量值分别为 2 2 8mg/ (m2 ·d)和 1 71mg/ (m2 ·d) ,次表层最大值成为调查海域水体叶绿素a分布的一个明显特点 .叶绿素a总量平面分布趋向表明 :高生物量主要位于巴士海峡邻近、菲律宾以及伊里安岛的近岸站位 ,此外 ,在 2°～ 4°N之间的观测区 .低生物量主要位于外洋海域 .生物量的分布与不同海域的物理过程变化有关 ,而海水涌升可能是导致温度、盐度和营养盐分布产生变化 ,并因而导致高生物量的一个重要的物理过程 .

Primary productions in the western tropicl Pacific and equatorial warm waters are studied in the WOCE cruise in November 1991and the TOGA COARE cruises from November 1992 to February 1993. It is shown that total amount of integrated chl a is 19.79 mg/m 2 in depth of 0～150 m and average daily primary production with, 171 mg/(m 2·d) appears in the western tropical Pacific while higher chl a ( 21.68 mg/m 2 ) and primary production [228 mg/(m 2·d)] occur in equatorial warm waters. The higher chl a is found at the coastal stations of the Philippines and Pulau Irian while lower chl a is at the offshore areas bounded by 2°～4°N. It shows that the distribution pattern of chl a biomass is related to different physical processes. Upwelling, which may have led to a high biomass, is a critical factor varying the distributions of temperature, sanility and nutrient in these areas.