浮游植物对海水升温影响的试验

Experimental Study of the Impact of Phytoplankton on Water Temperature

浮游植物的光合作用对海洋吸收太阳辐射的升温过程有一定的调节作用.为了更好地阐释这一调节作用,设定490nm光照条件,采用3组吸收特征不同的水样,同步进行光照试验.结果显示,浮游植物的光合作用对海水的升温幅度产生17.9%~20.0%的减弱作用,说明次表层(10~50m)海水因太阳辐射导致的升温幅度很可能与目前通用的海洋环流模式估算结果不一致,而影响程度会因不同海域的叶绿素浓度不同而有所差异.这一结果对于进一步完善海洋环流及气候模式中对各参数的模拟,更好地认识海洋浮游植物在调节气候变化中的作用,有一定的参考意义.

Photosynthesis of phytoplankton has a modulation effect in warming of the upper water column by absorbing solar radiation.To elucidate this modulation effect,in this study,we presents results of an experiment where three kinds of water samples were heated by light at 490 nm.It is found that the heating effect is reduced by 17.9%to 20.0%for phytoplankton dominant waters compared with that of yellow-substance dominant waters,although both have similar absorption properties at 490 nm.The result indicates that the heating effect of the upper water column（10mto 50 m）due to solar radiation may not be as high as that presently estimated in the oceanic circulation models.It supplies references to improve existing circulation and climate models in order to better represent the modulation effect by phytoplankton.