春季东印度洋次表层亚硝酸盐最大值的分布特征及影响因素  

Spatial Distribution of Primary Nitrite Maximum and Its Influencing Factors in the East Indian Ocean in Spring

作　　者：张文全[1] 王保栋[1] 韦钦胜[1] 孙霞[1] 辛明[1] 王子成[1] 

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061

出　　处：《海洋科学进展》2016年第3期403-410,共8页Advances in Marine Science

基　　金：全球变化与海气相互作用专项--东印度洋南部水体综合调查春季航次(GASI-03-01-02-01)

摘　　要：根据2013年春季东印度洋现场调查资料,研究了次表层亚硝酸盐最大值的空间分布特征及其形成机制。结果表明,春季东印度洋次表层亚硝酸盐最大值（PNM）一般位于75-100m水层中,且呈现斑块状分布,在赤道附近PNM所处深度较深,随着南北纬度的增加,PNM水深相应抬升。PNM位于温密跃层/营养盐跃层的中上部,且与次表层叶绿素最大值层（SCM）存在显著的相关关系。在深度上,PNM一般位于SCM层内下半部,且PNM深度随SCM深度的增加而增加;在量值上,PNM量值与同层叶绿素a质量浓度呈现显著正相关关系。结合PNM的影响因素分析,认为东印度洋PNM主要是源自浮游植物的释放。Based on the multi-disciplinary investigation in the East Indian Ocean in spring of 2013,the characteristics of nitrite spatial distribution in the upper water column and the formation mechanism of Primary Nitrite Maximum（PNM）were studied.The results showed that the pattern of PNM appeared in a manner of patch distribution in the water depth of 75~100min spring.The PNM layer was deeper in the area around the equator and its depth rose accompaning with the increase of latitude towards the south or the north.Furthermore,the PNM usually located in the upper boundary of the pycnocline and nutricline presenting a significantly positive correlation with the depth of Subsurface Chlorophyll Maximum（SCM）.On the other hand,the depth of PNM was deeper with the increased depth of SCM in vertical distribution and the magnitude of PNM was significantly and positively correlated with the chlorophyll a concentration in the same layer.The analysis in combination with environmental factors of PNM suggested that the PNM in the East Indian Ocean was mainly released from the phytoplankton in spring.

关 键 词：东印度洋 亚硝酸盐 空间分布 次表层亚硝酸盐最大值(PNM) 影响因素 

分 类 号：P734.4[天文地球—海洋化学]