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东亚边缘海区浮游植物春华的纬向与年际变化 总被引：1，自引：1，他引：0
Combined studies of latitudinal and interannual variations of annual phytoplankton bloom peak in East Asian marginal seas(17°–58°N, including the northern South China Sea(SCS), Kuroshio waters, the Sea of Japan and the Okhotsk Sea) are rarely. Based on satellite-retrieved ten-year(2003–2012) median timing of the annual Chlorophyll a concentration(Chl a) climax, here we report that this annual spring bloom peak generally delays from the SCS in January to the Okhotsk Sea in June at a rate of(21.20±2.86) km/d(decadal median±SD). Spring bloom is dominant feature of the phytoplankton annual cycle over these regions, except for the SCS which features winter bloom. The fluctuation of the annual peak timing is mainly within ±48 d departured from the decadal median peak date, therefore this period(the decadal median peak date ±48 d) is defined as annual spring bloom period. As sea surface temperature rises, earlier spring bloom peak timing but decreasing averaged Chl a biomass in the spring bloom period due to insufficient light is evident in the Okhotsk Sea from 2003 to 2012. For the rest of three study domains, there are no significant interannual variance trend of the peak timing and the averaged Chl a biomass. Furthermore this change of spring phytoplankton bloom timing and magnitude in the Okhotsk Sea challenges previous prediction that ocean warming would enhance algal productivity at high latitudes. 相似文献
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长江口及其邻近海域CDOM光谱吸收特性分析 总被引：3，自引：0，他引：3
研究了长江口及其邻近海域有色可溶性有机物(CDOM)的光吸收特性,分析了CDOM浓度(吸收系数a(440))、光谱斜率(Sg)与盐度的关系。结果表明:长江口及其邻近海域CDOM的a(440)变化范围为0.21~0.85 m-1,平均值为0.44 m-1;Sg值的范围为0.013 3~0.016 7 nm-1,平均值为0.014 nm-1;a(440)的水平分布表现为长江口海区比外海区高,Sg的水平分布表现为长江口海区比外海区低,反映了长江口海区CDOM中的腐殖酸成分比外海区大。研究区内a(440)与盐度、Sg与盐度明显线性相关,表明CDOM在河口混合行为中呈保守行为,CDOM具有良好的保守性质。 相似文献
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