登陆北上影响山东的9216号强热带风暴

对北上影响山东造成重大灾害的９２１６号强热带风暴进行了分析。涡度诊断分析和能量场分析表明，该热带风暴低压一直沿着正涡度中心及高能轴方向移动。暴雨中心集中在高能舌顶热附近，并与正涡度中心相一致。     

Water quality of a port in NW Mexico and its rehabilitation with swell energy

Ensenada Harbor is one of the most important ports of Mexico. Anthropogenic activities have affected the area over several decades, leading to the accumulation of contaminants in its sediments, which eventually are re-suspended into the water column. In spite of water treatment of the tributaries that discharge into the Ensenada Harbor, the water circulation patterns of the harbor, which consist of closed eddies in the northern and southeastern sector, favor the accumulation of those contaminants and hinder exchange with adjacent seawater. Samples collected in October of 2005 registered 63 μM total inorganic nitrogen and 280 mg/L of COD, confirming that this is a highly contaminated environment when compared with other water bodies of North America. Such concentrations can be lowered up to 80% by using a wave energy pumping system that demonstrates the possibility to gradually dilute these contaminants and rehabilitate the Ensenada Harbor.     

Black hole shadow image and visibility analysis of Sagittarius A*

The compact dark objects with very large masses residing at the centres of galaxies are believed to be black holes. Due to the gravitational lensing effect, they would cast a shadow larger than their horizon size over the background; the shape and size of this shadow can be calculated. For the supermassive black hole candidate Sgr A*, this shadow spans an angular size of about 50 μas, which is under the resolution attainable with the current astronomical instruments. Such a shadow image of Sgr A* will be observable at about 1 mm wavelength, considering the scatter broadening by the interstellar medium. By simulating the black hole shadow image of Sgr A* with the radiatively inefficient accretion flow model, we demonstrate that analysing the properties of the visibility function can help us determine some parameters of the black hole configuration, which is instructive for the submillimetre Very Long Baseline Interferometry (VLBI) observations of Sgr A* to be made in the near future.     

江西银山火山岩型铜、金多金属矿床成矿特点

江西银山铜、金多金属矿床的矿化紧紧围绕多个中心呈有规律地分布,成矿物质既由岩浆从地壳深部带来,又部分来自基底围岩;成矿作用既受燕山期火山机构控制,也受基底构造控制;矿化具有多个中心复合叠加分带的特点,是一个典型的地洼型多因复成矿床。     

从金矿的找矿矿物学研究看量子矿物学的发展

在太行山地区用几种新的矿物学方法对金矿床的载金矿物-黄铁矿和石英进行了矿物物理学方面的测试研究,从中获得了石英红外吸光度、O~--Al心浓度、红外光谱以及黄铁矿的热电性质、热电系数等与矿体的含金性具有密切相关关系,可以作为金矿找矿的有效方法。这些方法的引入,说明新的边缘学科——量子矿物学已经形成,并正在发展。     

高低压中心、槽线识别的初步试验

利用经过截取处理的欧亚范围的欧洲格点数据，通过运算转化为屏幕网格资料，采用逐点追踪方法绘制等压线，运用统计识别法和模糊识别技术，结合实测风场订正，对高低压中心和槽线进行分析识别。试验结果表明，计算机能基本准确的识别出高低压中心及槽线，且速度比人工快得多，从而可做为人工智能工作站的一相接口，并为天气图的客观化和自动化分析作了初步尝试。     

ESR dating of optically bleached quartz grains from Plio-Pleistocene to Holocene coastal dune deposits (Wilderness-Knysna area,South Africa): a comparison with luminescence

Five Plio-Pleistocene to Holocene aeolian quartz samples from the coastal dune deposits of the Wilderness-Knysna area (South Africa) previously dated by OSL were selected for ESR dating. Samples were processed following the Multiple Centre approach and using the Multiple Aliquot Additive dose method. Aluminium (Al) and Titanium (Ti) signals were systematically measured in all samples.Our study shows that ESR results obtained for Middle Pleistocene to Holocene samples may be strongly impacted by (i) the presence of a significant high frequency noise in the ESR spectra acquired for the Ti signals and (ii) the choice of the fitting function employed. In particular, if not taken into account, very noisy spectra can lead to a significant overestimation of the true ESR intensity measured for the Ti–H signal. These sources of uncertainty are however not sufficient to remove the ESR age overestimations. Consequently, our results indicate that the Al and Ti ESR signals of these quartz samples have not been fully reset during their aeolian transport.While this work contributes to improve our understanding of the ESR method applied to quartz grains, and especially of the potential and limitations of the Ti signals, it also provides additional baseline data to illustrate the existing variability among quartz samples of different origins or sedimentary context. Our results are consistent with previous studies by confirming that the Ti–H signal shows the best potential for the evaluation of low dose values (<100 Gy for these samples), whereas it becomes inappropriate for the higher dose range, and the Ti–Li–H (option D sensu Duval and Guilarte, 2015) should be used instead.Beyond the methodological outcome, this ESR dating study also provides a useful addition to the existing chronology of the aeolian deposits in this region. In particular, new (and possibly) finite numerical age results were obtained for the two oldest samples, constraining the aeolianite landward barrier dune and the coversand formations to the MIS 10-8 and Pliocene, respectively.     

The geo-politics of Brexit,the euro and the City of London

In this review, we call for more engagement with the geo-political dimension of the finance economy that epitomises the 21st-century capitalist order within the European Union. Using the example of financial clearing and settlement, key processes in global trade and finance mechanisms in which London leads the world, we discuss the entangled political and economic dimensions in the shadow of Brexit to come, and its potential impact on the City’s complex financial ecosystem. The aim here is not to consult the crystal ball and predict London’s future as a financial centre. Yet, euro clearing is of geo-political relevance: if the UK leaves the EU, euro clearing would be taking place outside of the ECB’s regulatory space of intervention. This can become highly problematic, as the nominal euro sums involved in a major crisis are immense. We believe that these processes illustrate the pressing need to engage with finance’s geo-economics and geo-politics in more depth, both empirically and conceptually.