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本文分析了自29°N～67°S,1989～1990年中国南大洋考察和1990年中日黑潮调查部分站位海水样碘的不同化学形式,并讨论了碘与营养盐及生物生产力等的制约关系。分析结果表明,大平洋赤道以南的总溶解无机碘较北侧为高。赤道南北热带、亚热带的碘离子分布具有明显的对称性。南极辐合带附近表层海水碘离子含量极低,一般仅占总无机碘含量的10％。海水溶解有机碘约占总无机碘的10％左右,无论平面或剖面都没有显著的变化。碘的含量分布在海洋生物地球化学体系中居于保守和生物制约性之间,从大尺度范围看I/S值有一定的稳定性,但在个别地域里其分布值又可受生物活动的影响。此外,实验证据表明表层海水有机颗粒的清除及真光层底部有机质的再矿化作用强化了碘在海水中类似于营养盐的剖面特征。
This paper analyzes the different chemical forms of seawater-like iodine in some stations from 29 ° N to 67 ° S, from 1989 to 1990 in the southern China ocean survey and in the mid-twentieth-century Kuroshio survey in 1990, and discusses the effects of iodine, nutrients and biological productivity The relationship between the constraints. Analytical results show that total dissolved inorganic iodine south of the equatorial Pacific is higher than that of the north side. Equatorial north-south tropical, sub-tropical iodine ion distribution has obvious symmetry. The iodine ion content of the surface seawater near the Antarctic Convergence Zone is extremely low, generally only 10% of the total inorganic iodine content. Dissolved organic iodine in seawater accounts for about 10% of the total inorganic iodine, no significant changes in the plane or profile. The distribution of iodine is between conservative and biological constraints in the marine biogeochemical system. The I / S value has some stability in the large-scale range, but its distribution value can be affected by biological activities in some areas . In addition, experimental evidence indicates that the removal of organic matter from surface seawater and the remineralization of organic matter at the bottom of euphotomy intensify the profile of iodine similar to nutrients in seawater.