The Second Decadal Leading Mode of East Asian Summer Monsoon Rainfall

The first decadal leading mode of East Asian summer rainfall （EASR） is characterized by rainfall anomalies along the East Asian subtropical rain belt. This study focuses on the second decadal leading mode （2DLM）, accounting for 17.3% of rainfall decadal vari- ance, as distinct from the other two neighboring modes of EAMR, based on the state-of-the-art in-situ rainfall data. This mode is characterized by a South-China-wet-Huaihe- River-dry pattern, and is dominated by a quasi-30-yr pe- riod. Further analysis reveals the 2DLM corresponds to an enhanced lower-level monsoon jet, an eastward extension of the western North Pacific subtropical high, and a weakened East Asian upper-level westerly jet flow. The Tibetan Plateau surface temperature and Pacific Decadal Oscillation （PDO） are closely linked with the 2DLM. The regressed SST pattern indicates the PDO-like pattern of sea surface temperature anomalies may have a telecon- nection relationship with the 2DLM of EASR.     

中国近海浮游桡足类中华哲水蚤（Calanussinicus Brodsky）的分子系统地理学和种群遗传结构研究

Planktonic copepod Calanus sinicus is the dominant meso-zooplankton in the Northwest Pacific Ocean. To better understand its population dynamics and phylogeographic patterns, 243 C. sinicus individuals were collected from seven locations across the shelf waters of China and its population genetics was studied by mitochondrial DNA cytochrome oxidase I(mtCOI) sequences analyses. Thirty-nine different sequences, or haplotypes, were detected with moderate haplotype diversity(h=0.749) and low nucleotide diversity(π=0.003) for all populations. The evolutionary divergence between geographic populations varied from 0.24% to 0.37%, indicative of very limited genetic differentiation. Visualized minimum spanning network(MSN) and phylogenetic analysis of all the detected haplotypes did not reveal any clear phylogeographic pattern. Furthermore, AMOVA data showed no significant spatial population differentiation existed among the individuals collected across China shelf waters. Pairwise FST values showed that population collected from northwest of the East China Sea(ECS) displayed a low difference to other populations. Mismatch distribution analyses and neutrality tests indicated that C. sinicus might undergo a demographic/population expansion. No significant population genetic structuring was detected, indicating an extensive gene flow among the C. sinicus populations. Our results provide molecular evidence for the hypothesis that C. sinicus in the northwestern South China Sea in winter is transported from the East China Sea and the Yellow Sea by the China Coastal Current during the northeast monsoon period.     

CMIP5/AMIP GCM simulations of East Asian summer monsoon

The East Asian summer monsoon （EASM） is a distinctive component of the Asian climate system and critically influences the economy and society of the region.To understand the ability of AGCMs in capturing the major features of EASM,10 models that participated in Coupled Model Intercomparison Project/Atmospheric Model Intercomparison Project （CMIP5/AMIP）,which used observational SST and sea ice to drive AGCMs during the period 1979-2008,were evaluated by comparing with observations and AMIP Ⅱ simulations.The results indicated that the multi-model ensemble （MME） of CMIP5/AMIP captures the main characteristics of precipitation and monsoon circulation,and shows the best skill in EASM simulation,better than the AMIP Ⅱ MME.As for the Meiyu/Changma/Baiyu rainbelt,the intensity of rainfall is underestimated in all the models.The biases are caused by a weak western Pacific subtropical high （WPSH） and accompanying eastward southwesterly winds in group Ⅰ models,and by a too strong and west-extended WPSH as well as westerly winds in group Ⅱ models.Considerable systematic errors exist in the simulated seasonal migration of rainfall,and the notable northward jumps and rainfall persistence remain a challenge for all the models.However,the CMIP5/AMIP MME is skillful in simulating the western North Pacific monsoon index （WNPMI）.     

中建西北院预制耗能墙技术获国家专利

近日,中国建筑西北设计研究院（以下简称“中建西北院”）申请的专利技术“预制纤维增强混凝土耗能墙“获得国家知识产权局授权。预制纤维增强混凝土耗能墙由工程纤维增强水泥基复合材料（ECC）预制而成,其延性、耗能能力是普通混凝土墙的2倍～3倍,可作为抗侧力耗能构件安装于主体结构所需部位。由于耗能墙在主体完工后安装,不承担竖向荷载,其截面尺寸较小,具有布置灵活、不影响建筑美观及使用功能、价格低廉、低碳环保的优势,能够有效地解决混凝土结构设计过程中诸如结构扭转不规则、竖向不规则、剪重比不足、框架一剪力墙（核心筒）结构中外框分配剪力不足等一系列问题,可作为屈曲约束支撑的中端替代产品（价格约为屈曲约束支撑的1／3）,应用范围十分广阔。     

《西北地质》2001～2012年总被引频次的统计与分析

期刊的总被引频次在期刊的统计与分析中是十分重要的,笔者利用中国科学技术信息研究所出版的《中国科技期刊引证报告》(核心板)(CJCR)和万方数据出版的《中国期刊引证研究报告》(扩展版)(WD)等二家比较著名的统计机构的统计数据,对《西北地质》总被引频次进行了统计与分析。为了不断提高《西北地质》的办刊质量,笔者重点对《西北地质》2001~2012年的总被引频次及相关数据进行了统计与分析。结果表明:《西北地质》从2001~2012年在《中国科技期刊引证报告》(核心版)中的总被引频次增加了416,总被引频次增长率为660.32﹪。《西北地质》从2003~2012年在《中国科技期刊引证报告》中的总被引频次增加了782,总被引频次增长率为1133.33﹪。事实说明,《西北地质》多年来总被引频次一直在稳步上升。最后,笔者分析了影响期刊总被引频次的因素,对如何提高期刊的总被引频次提出了合理化的建议。     

《西北地质》被“地球与环境科学信息网(EES)”收录

<正>伴随着全球经济一体化的进程,科学、文化也必然会出现最大程度的合作与融合。为了进一步提高期刊的影响力、扩大传播范围,全面提升期刊的服务质量和内涵,在"国家科技期刊出版基地"项目支持下,中国科技出版传媒股份有限公司(科学出版社)建立了"地球与环境科学信息网(EES)"。EES收录了地球与环境科学领域(地理学、地质学、地球化学、地球物理学和空、物理学、大气科学、     

How many sutures in the southern Central Asian Orogenic Belt：Insights from East Xinjiang-West Gansu（NW China）？

How ophiolitic mèlanges can be defined as sutures is controversial with regard to accretionary orogenesis and continental growth.The Chinese Altay,East junggar,Tianshan,and Beishan belts of the southern Central Asian Orogenic Belt（CAOB） in Northwest China,offer a special natural laboratory to resolve this puzzle.In the Chinese Altay,the Erqis unit consists of ophiolitic melanges and coherent assemblages,forming a Paleozoic accretionary complex.At least two ophiolitic melanges（Armantai,and Kelameili） in East Junggar,characterized by imbricated ophiolitic melanges,Nb-enriched basalts,adakitic rocks and volcanic rocks,belong to a Devonian-Carboniferous intra-oceanic island arc with some Paleozoic ophiolites,superimposed by Permian arc volcanism.In the Tianshan,ophiolitic melanges like Kanggurtag,North Tianshan,and South Tianshan occur as part of some Paleozoic accretionary complexes related to amalgamation of arc terranes.In the Beishan there are also several ophiolitic melanges,including the Hongshishan,Xingxingxia-Shibangjing,Hongliuhe-Xichangjing,and Liuyuan ophiolitic units.Most ophiolitic melanges in the study area are characterized by ultramafic,mafic and other components,which are juxtaposed,or even emplaced as lenses and knockers in a matrix of some coherent units.The tectonic settings of various components are different,and some adjacent units in the same melange show contrasting different tectonic settings.The formation ages of these various components are in a wide spectrum,varying from Neoproterozoic to Permian.Therefore we cannot assume that these ophiolitic melanges always form in linear sutures as a result of the closure of specific oceans.Often the ophiolitic components formed either as the substrate of intra-oceanic arcs,or were accreted as lenses or knockers in subduction-accretion complexes.Using published age and paleogeographic constraints,we propose the presence of （1） a major early Paleozoic tectonic boundary that separates the Chinese Altay-East Junggar multiple subduction system     

赞比亚西北省铜-钴矿地质及找矿潜力

[摘 要]赞比亚位于著名的中非新元古代沉积型铜（-钴）矿带上,铜带省和西北省是该国最主要的铜-钴矿集中分布区;相对于找矿程度已经很高的铜带省,西北省成矿地质条件优越,且地质工作程度较低,因此拥有巨大的找矿潜力,已成为该国找矿突破的重点区域。目前西北省主要著名的矿山/矿床有3个：坎桑希、卢穆瓦纳、卡伦比拉。这些铜-钴-金-铀-镍矿床的含矿地层、矿化特征与铜带省传统经典的沉积型铜-钴矿既有相似性,又明显具有差别。本文通过对西北省区域地质和已发现矿床地质特征的介绍,对该省的找矿潜力进行初步分析。     

“好用不贵”的法国“西北风”级两栖攻击舰

＂西北风＂级两栖攻击舰是法国二战后开发的第四代两栖舰,用于替代20世纪60年代服役的＂暴风＂级船坞登陆舰,满足法国海军对于兵力投送和指挥的需求。该级舰一共建造2艘,首舰“西北风”号（舷号L9013）已在2005年年底服役，2号舰“雷电”号（L9014）于2010年初被法国海军接收。     

保护还是搁置主权？——浅析美加两国西北航道核心问题

长期以来，困扰美国和加拿大两国北极关系的核心问题是西北航道是否属于国际海峡。什么样的海峡是国际海峡？根据国际法庭判决，国际海峡必须满足两个条件：地理标准和使用功能标准。地理标准在国际上没有多少争执的声音，北极群岛是连接大西洋和太平洋之间的通道也成为世界共识，存在重大分歧均是功能标准。