Natural thermoluminescence of fossil foraminiferals as a potential proxy for deep-sea temperature changes

Foraminiferal shells from two piston cores separately located at the Ninetyeast Ridge and the Bengal Fan of the Indian Ocean were selected and purified for measurements of natural thermoluminescence （NTL） intensity by a high precision thermoluminescence meter （RGD-3）. Variations of the NTL intensity along the two core sequences both spanning the last two glacial--interglacial cycles displayed a strong, identical signal of the global ice volume cycles, which matched well with their corresponding oxygen isotope data. As higher NTL intensity occurred within interglacial periods and changes in an NTL signal were most likely influenced by the temperature of ambient seawater in which the planktonic foraminiferal shells long existed, the NTL signal could be considered as a potential proxy for orbital scale temperature changes of bottom seawater in the tropical Indian Ocean.     

冰河期要来？

近日,英国一项最新研究表明,如果没有人类排放的大量温室气体,下一个冰河世纪很可能会在1500年内到来,但现在大气中二氧化碳的浓度决定了它不会在这个时间段内到来。     

Environmental Evolution of the Water Body of Qinghai Lake since the Postglacial Age

Based on the data developed from various s natural waters in the Qinghai Lake area and ostracode shells present in drill core QH-16A of recent lake-floor sediments ,this paper discusses the distribution of stable isotopes in the modern water body of Qinghai Lake,and the initial isotopic composition of the lake water has been deduced ,Studies of δ^18O,δ^13C,Mg/Ca and Sr/Ca in ostracode shells provide the basis for the establishment of the model of climatic fluctuation in the Qinghai Lake area since the postaglacial age,as well as for the elucidation of the environmental evolution of the water body of Qinghai Lake since the postglacial age.     

外媒：今年寒冬显示小冰河期来临

据国外媒体报道,一股强烈的寒流2月2日席卷了欧洲大部分地区,多个国家降下大雪,因难以抵抗严寒而冻死的人数一直在增加,截至目前死亡人数已经达到202人。此外,日本和韩国正遭遇近几年来最寒冷的冬季。日本北部持续数周的暴雪引发雪崩并导致交通网络中断,目前至少有56人丧生。韩国首尔则创下55年来的最低温度。     

气候变化究竟何去何从

王乃仙在2007年3月19日《光明日报》撰文指出，世界气候确实在变，而且过去在变，现在在变，将来还要变。问题是朝着什么方向变？是变好呢，还是“日趋恶化”？对于这个问题，目前各方说法不一。有两种说法比较有代表性。一种是变冷说，也叫“冰河期说”，以日本为代表。日本的气象学家认为高纬度地区变冷是世界气象反常的原因。另一种是变暖说，或者叫“大气热污染说”，     

从“黄金10年”到“冰河期” 煤炭行业进入长期下滑周期

<正>"山西煤老板"在过去几年的老百姓印象中,似乎被当成一个特殊群体。在中国,他们曾一度被全国各大媒体关注:2005年,11位煤炭商人被列入胡润能源富豪榜,其中9位来自山西。他们"招摇"、"奢华"的传闻在媒体上屡见不鲜。然而,随着煤炭产业结束10年黄金发展期,煤炭企业的光景开始日益下滑。2012年,煤炭市场风云突变,4号主焦煤的价格从每吨1800元掉到了每吨500多元,5号原煤的价格也由每吨600元降至每吨260元。2014年春节过后,煤炭市场行情更不乐观,焦炭每吨跌至1000元左右,而在2013年6~7月,