The records of coastline changes reflected by mangroves on the Sunda Shelf since the last 40 ka

This paper presents a 40000-year-long high-resolution mangrove record from sediments of Core 18300, 18302 and 18323 on the continental shelf of the southern South China Sea and reconstructs the coastline changes on Sunda Shelf since the last 40000 years. In the period Marine Isotope 3, the old Sunda Shelf had low sea level, and it was partly exposed. Flourishing vegetations grew on the exposed old land. Mangroves developed along the coastline. On the Last Glacial Maximum, the sea level dropped greatly, coastline moved from inner shelf to outer shelf, the Old Sunda Land exposed further, and the lowering sea level induced the gradual disappearing of mangroves from the inner Sunda Shelf to the outer Sunda Shelf. And pioneer vegetation ferns covered the broadly exposed old land immediately. At the time of the last Deglaciation, sea level rose greatly, the coastline moved to the sea and the Sunda Shelf was drown again. Mangroves were emergent again from outer shelf to inner shelf and developed quickly.     

末次冰期以来东海内陆架沉积反映的海平面变化

对东海内陆架泥质沉积区MD06-3042孔(27°05.4′N,121°24.1′E,水深62m,岩芯长34.1m)样品进行了高分辨率的粒度分析和14C年代测试,重建了末次冰期以来东海内陆架区的海平面及沉积环境的变化.14.0ka左右,海平面已经到达现今海平面下62m等深线的位置,大量沉积物在此沉积.13.0~4.2ka之间,受海流等多种因素影响,少量沉积物在此沉积.4.2~3.2ka之间,现代东海内陆架的泥质沉积主体在该岩芯附近快速堆积.东海内陆架的泥质沉积体由北向南,由内向外逐渐形成,具有阶段性.     

生态叙事:麦克尤恩小说研究

麦克尤恩的小说契合时代的脉搏,将自然﹑生命﹑生存﹑成长等严肃深邃的生态主题用生动的故事呈现出来,充满了众生平等﹑和谐共生的呼唤,渗透"回归生命本真,良知呵护生命和地球"的理想,给读者以深刻的反思和启示。     

Sources of sediments filling the Qiantangjiang estuary incised valley since the Last Glaciation

The volumes of each sedimentary facies in the Qiantongjiang estuary area have been calculated based on layer thickness data of about 100 bores. The sediment sources of each facies have been discussed on the basis of the previous work and the above calculations.     

错位认知下的艺术母题及生命之思——《最后一片叶子》的另一种解读

存在着质的区别的最后一片叶子由于其实用价值的一致性和形体的相似性而取得了统一,由它们所形成的矛盾统一体在琼珊的错位认知的导引下,形成了一种结构上的开放性,欧.亨利这样的艺术处理至少引出两组悖论式的结局,这两组矛盾在更深层的意义上揭示了一个永恒的文学母题:艺术可以使一个人获得真正意义上的赎救。而在最后一片叶子所营造的极端化情景中也潜藏着对生命的深沉思考:珍视现世抑或追求艺术上的永生。     

末次盛冰期以来长江入海历史的回顾与展望

比较全面地回顾了末次盛冰期以来有关东海海平面变化、长江入海历史、长江河口海岸演变、陆架上的古河道等方面的研究进展 ;分析了关于末次盛冰期时长江入海状况现存两种截然不同的看法 ,指出了可能存在的问题。提出了今后的研究方向 ,即应加强对因气候、海平面变化引起的河道变形作用以及长江与古环境间的相互作用及相互影响的研究 ,特别是应加强对陆架泥质沉积物的研究 ,以期取得突破性进展     

Imprint of solar activity on Nanjing stalagmite annual layer thickness sequence during the Last Glacial Maximum

PREVIOUS STUDIES ON ANNUAL GROWTH LAMINAE IN STA-LAGMITES SUGGESTED THAT IT IS A USEFUL PROXY TO INVESTI-GATE ANNUALLY HIGH-RESOLUTION CLIMATES[1―4].THE VARIA-TION OF ANNUAL LAMINAE THICKNESS HAS BEEN EXPLAINED AS REFLECTING SEASONAL CHANGES EITHER IN DR…     

《杯酒留痕》的死亡尊严与德勒兹的生命哲学

英国当代作家格雷厄姆·斯威夫特的《杯酒留痕》通过一段将逝者骨灰撒入大海的旅程中所发生的故事，展现出对于人类生存状态与死亡的思考。本文以法国当代哲学家德勒兹的生命哲学理论为切入点，分别从死亡的超脱、死亡的主题、死亡的尊严等方面论述分析《杯酒留痕》中人物在各个不同的层面所体现的死亡感悟。挖掘出作品内涵：生命不应有权力的场域隔阂，无论是活着还是死去，每个人都应该享有平等的尊严。     

A palynological and palaeoclimatological record from the southern Philippines since the Last Glacial Maximum

A palynological analysis of a marine sediment core in the southern Philippines,provides a detailed regional vegetation and climate history for the West Pacific Warm Pool(WPWP)since the Last Glacial Maximum(LGM).Chronology was determined by a detailed oxygen isotope record.A higher representation of pollen from tropical upper montane rainforest during the LGM indicate that this forest type moved down along elevation,probabaly due to the lowered temperature.During the last deglaciation and the early Holocene,mangroves were more expanded and tropical mid and upper montane rainforests were restricted,suggesting a rising sea-level and temperature increase.Herbaceous pollen and pteridophyte spore records indicate a much drier condition during the LGM than the Holocene.Mangrove development is controlled by conditions at the river mouth influenced by river discharge.Pteridophyte spores are abundant in wet conditions and are mainly transported by rivers.During the mid-Holocene,the reduction in mangrove pollen and pteridophyte spore appears to be a result of climate change:mainly decrease in river discharge.This may have been affected by the decreasing intensity of the Southeast Asian Monsoon,and the increasing frequency and intensity of warm ENSO events,El Ni?o,in this region.