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2014年春秋季对台湾以东黑潮主流径区碳化学的研究表明,春季黑潮主流径水体垂向可划分为黑潮表层水(KSW)、热带水(KTW)、中层水(KIW)和深层水(KDW),水层以30~50m、300~400m和800~1000m分界。黑潮水体中溶解无机碳(dissolved inorganic carbon,DIC)平均含量为2078.1μmol/kg,溶解有机碳(dissolved organic carbon,DOC)和颗粒有机碳(particulate organic carbon,POC)平均含量分别为98.59μmol/L和1.62μmol/L。各参数中,pH随水深的增加而降低;总碱度(total alkalinity,TAlk)、DIC含量和DIC/TAlk则随水深的增加而升高;DOC和POC在200m以浅含量较高,而在200m以深降为相对均一的低值。黑潮主流径水体中碳的分布在表层受到浮游植物生产、细菌分解、海-气界面交换及陆源输送等多种因素的综合影响;在次表层至中层水体中,初级生产的影响消失,有机物的分解对水体中的碳分布有着重要影响;在中层至底层水体中,有机物分解逐渐完成,CaCO_3溶解过程及陆坡沉积物的水平输运成为水体中碳分布的主要影响因素。位于上升流中心的TW0-1站位各参数均受到较深层次水体挟游离CO_2与营养盐上涌的影响,与黑潮主流径其他站位略有不同。秋季黑潮主流径水体垂向上依然能够划分为表层水、热带水、中层水和深层水4层,分别在75~100m、300~500m和800~1000m分界。秋季黑潮水体中DIC平均含量为2078.7μmol/kg,DOC和POC平均含量分别为92.36μmol/L和1.93μmol/L;黑潮主流径各层水体中各水文、碳参数分布规律与春季相似,影响因素也类似。秋季黑潮流域各站位碳参数值与春季略有不同,其可能是由浮游植物生产、利用及微生物分解量降低造成的。秋季黑潮水体中DIC含量和DIC/TAlk与春季差异较小,但pH和TAlk高于春季,由此可以推测,秋季黑潮水体中有着较高的[CO_3~(2–)]/[HCO_3~–]。
In the spring and autumn of 2014, the study of carbon chemistry in the main track of Kuroshio in the east of Taiwan showed that the vertical trend of the Kuroshio main stream path in spring can be divided into KSW, KTW, KIW and deep Water (KDW), the water layer to 30 ~ 50m, 300 ~ 400m and 800 ~ 1000m boundaries. The average content of dissolved organic carbon (DIC) in the Kuroshio was 2078.1μmol / kg, and the average contents of dissolved organic carbon (DOC) and particulate organic carbon (POC) were 98.59μmol / L and 1.62 μmol / L. In each parameter, the pH decreased with the increase of water depth. The total alkalinity (TAlk), DIC content and DIC / TAlk increased with the increase of water depth. DOC and POC were higher at 200m, Take a deep drop as a relatively low value. The distribution of carbon in the mainstream of the Kuroshio Current was affected by the combination of phytoplankton production, bacterial decomposition, sea-air interface exchange and terrestrial transport. In the subsurface-to-middle water body, the influence of primary production disappeared and organic matter The decomposition of organic matter in middle and bottom water bodies is gradually completed. The dissolution process of CaCO_3 and the horizontal transport of slope sediments are the main factors affecting the distribution of carbon in water. The parameters of TW0-1 station located at the center of upwelling are affected by the free CO_2 and nutrient upwelling of the deeper water bodies, which is slightly different from other stations of the mainstream of the Kuroshio Current. The mainstream of autumn Kuroshio current can still be divided vertically into 4 layers of surface water, tropical water, middle water and deep water, which are divided into 75 ~ 100m, 300 ~ 500m and 800 ~ 1000m respectively. The average content of DIC in autumn Kuroshio water was 2078.7μmol / kg, and the average contents of DOC and POC were 92.36μmol / L and 1.93μmol / L, respectively. The distribution of hydrological and carbon parameters in the Kuroshio main stream was similar to that in spring, Influencing factors are similar. The carbon parameter values of the stations in autumn Kuroshio basin are slightly different from those in spring, which may be caused by the decrease of phytoplankton production, utilization and microbial decomposition. In autumn Kuroshio water body, DIC content and DIC / TAlk had little difference with spring, but pH and TAlk were higher than those in spring, so it can be inferred that there was higher [CO 3 - (2 -)] / [HCO 3 ~ -].