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Based on above studies, some main conclusions were obtained as follows : 1 the diatoms forming mats in low latitude west pacific is"shade flora"diatom Ethmodiscus rex Hendey; 2 the sites found diatom mats are zone distributed, the direction is NW-SE and most distribute in the deep water area with flat seafloor, between 17°N~20°N and the water depth 4837-6150 m below Carbonate Compensation Depth (CCD 3) AMS 14C dates show that the sediments rich in diatom mats occurred during 16.0 ~ 28.6 ka B.P., which means the bloom mainly occurred in last glacial maximum, while there are not diatom mats deposits in other layers; 4 A total of 101 diatom taxa belonging to 40 genera had been identified from the 155 samples in the two cores WPD 03 and WPD 12, and the relative percentage of Thalassionema frauenfeldii are the highest, Thalassionema nitzschioides、Azpeitia nodulifera、Hemidiscus cuneiformis、Nitzschia marina take the second place.

14C年期间,即&勃发&发生于末次冰期最盛期;4在WPD 03和WPD 12两个岩芯共155个样品中共鉴定硅藻40属101种,且Thalassionema frauenfeldii的相对百分含量最高,Thalassionema nitzschioides、Azpeitia nodulifera、Nitzschia marina、Hemidiscus cuneiformis等次之,这五种硅藻占整个硅藻物种相对百分含量的85%左右,说明在该海域表层水体硅藻席沉积过程中,这五种硅藻最容易与成席硅藻在同时期的环境中生存,形成勃发;5MIS3期的晚期,该区域表层海水盐度降低,这有助于该区水体的成层化,从而使&树荫种&硅藻开始勃发,导致&秋季倾泻&;6末次冰期由于南极中层水北扩,南大洋中层水将富含硅酸盐的海水带入了研究区,即南大洋的&硅溢漏&作用,使该区域硅藻得以勃发,同时,铁输入的增多,可能也是造成硅藻勃发的主要原因之一。

Deeply study on changes of marine environment, provenance and flux of the sediments during the glaciation-interglaciation climatic cycle is a highlight field of the paleoceanography studies in the Okinawa Trough .

深入揭示冰期/间冰期气候旋回中冲绳海槽沉积物记录的海洋环境、物质来源和通量变化及其对古气候和海平面变化的响应信息,是该区古海洋学研究的前沿课题。

Comparing and analyzing of the paleoceanography characters from the SST, SSS, paleoproductivity, carbonate dissolution, paleo-monsoon and throughflow actions, we find it is obvious that the ocean currents system difference between the glacial and deglacial.

通过不同洋流区的岩芯末次冰期以来的古水温、古盐度、古生产力、碳酸盐溶解作用、古季风、穿越流活动等古海洋学特点的对比分析,可看出研究区冰期与冰后期海洋环流特点存在着明显的差异。

In contrast , the content of terrigenous sediment shows an opposite glacial-interglacial variation pattern.

分别用元素TiO2、CaO估算出沉积物中陆源碎屑的含量及CaCO3的含量,结果显示CaCO3在间冰期时高,而在冰期时低,表现出&大西洋旋回&的特征。

However, the significant uncertainties remain about the cause, mechanism and the scales of the impact of the abrupt change events, such as Dans...

主要介绍不同区域冰芯记录中末次间冰期冰期旋回这些气候突变事件发生的时间、过程和机制等的研究进展。

Deeply cut valley and deep accumulation events, global climate change, sealevel eustacy motion and crustal movement organically linked up are reported for the first time in this paper. The author points out a new viewpoint that global sea level greatly change during ice age and interglacial stage is the main reason that causes deep river valley and forms deep accumulation.

首次将河谷深切和深厚堆积事件与全球气候变化、海平面升降运动、地壳运动等有机地联系起来,并提出冰期、间冰期全球海平面大幅度升降,是导致河流深切成谷并形成深厚堆积的主要原因的新观点。

It's likely that the warming trend we're experiencing today is merely the expected return to warmer temperatures after the Little Ice Age, a period of extremely cold winters from the 16th to the early 19th century.

如今我们经历的全球变暖似乎只是小冰期之后必然的气候回暖,小冰期是指16世纪到19世纪全球普遍寒冷的时期。

Extrapolating the equation to the second phase of the Little Ice Age of the glacier, and inferring the equilibrium line altitude at that time from maximum elevation of lateral moraines, the climate condition during the phase can be determined. The result is closed to the previous outcomes deduced by other methods.

将公式外推到小冰期第二次冰进时的1号冰川,并运用侧碛垄最大高度法确定了小冰期第二次冰进时冰川的平衡线高度,给出了该次冰进时气候条件的半定量推算结果。

The ice-wedge developed in the prior moraines and the black fine gravels by glacial ablation accumulated on the periglacial zone.

末次冰期时长坪沟口属于冰缘地带,在前次冰期冰碛物上发育了冰楔构造,冰缘地带冰川融水形成黑色细砾堆积。

From Yungui Plateau, Dabie Mountains and Funiu Mountains, and West Tianmu Mountain in China to determine the Genetic structure of Ginkgo populations, and to infer the glacial refugia of Ginkgo survived Quaternary ice ages.

种群进行了系统地理学研究,分析了银杏的遗传多样性格局,并探讨了银杏冰期避难所在和冰期后的扩散情况。

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