华北地台南缘金成矿带铅同位素研究

华北地台南缘金矿带的矿石铅和燕山期花岗岩岩石铅与太华群岩石铅极为相似,μ,ω和Th/U比值都较低,其中矿石铅为多阶段铅。矿石铅和花岗岩岩石铅在~(207)Pb/~(204)Pb-~(206)Pb/~(204)Pb图上位于上地幔和下地壳铅演化线之间,表明它们来自具低U和Th/U比值的深部源区(太华群)。所有矿床的矿石铅均可拟合成具不同斜率的二次等时线,这证明矿石铅是在不同时代从一个统一的源区(太华群)分离并沉淀成矿的,同时受到壳源铅的混染。这充分证明了成矿的多期性和复杂性以及成因的多重性,但仍以变质成因为主。本文还讨论了铅模式年龄的意义。     

Record-breaking SST over mid-North Atlantic and extreme high temperature over the Jianghuai–Jiangnan region of China in 2013

In July 2013, the Jianghuai–Jiangnan region of China experienced a persistent extreme high temperature,and the surface air temperature(SAT) over many areas of the region set a new record, which had a profound impact on people's lives. This study explored the possible mechanism for this extreme climate phenomenon. The results show that the sea surface temperature(SST) over the midNorth Atlantic in July 2013 was the warmest observed over the past 160 years. The strong anomaly of the SST connects to the East Asian upper level westerly and western Pacific subtropical high(WPSH) via the teleconnection wave train and further contributes to the SAT variability over the Jianghuai–Jiangnan region; this connection could be one possible mechanism for the formation of the recordbreaking extreme hot event(EHE) over the Jianghuai–Jiangnan region in July 2013. In addition, for the EHE over the Jianghuai–Jiangnan region, the role of the WPSH was generally emphasised. This study found that the variability of the upper level westerly over the Jianghuai–Jiangnan region is also an important climate factor impacting the SAT of the region. In particular, the record-breaking weakness of the upper level westerly corresponded to the record-breaking SAT over the Jianghuai–Jiangnan region in July 2013. These results indicate that the role of the upper level westerly should be emphasised in addition to the WPSH, according to both the variability in the summer air temperature and the EHE over the Jianghuai–Jiangnan region.     

Delamination and destruction of the North China Craton

This article presents an overview on recent developments in studies of chemical and physical processes of lithospheric delamination with respect to destruction of the North China Craton. It is emphasized that the pyroxenite source resulting from interaction between eclogite-derived melt and peridotite is a direct consequence of delamination. The pyroxenite source thus formed has unique mineralogical and geochemical features, which characterize Mesozoic basalts of the North China Craton. Melt-peridotite interaction played an important role in refertilization of cratonic lithospheric mantle, leading to density increase, weakening and final destabilization of the North China Craton. The nature of the melt is the key to distinguish mechanisms of destructing this craton.     

西太平洋海温和北极海冰异常对大气环流的影响

利用九层菱形截断１５波的全球大气环流谱模式,对赤道西太平洋海表温度,北极海冰及综合异常精形在北半球夏季大气环流中的作用进行了一系列数值试验和分析。结果表明：赤道西太平洋海表温度的异常变化与北极海冰面呼焦异均可显著影响大气环流,但海冰异常对低纬大气环流的影响远小于西太平洋的海温异常的影响。对全球大气环流异常形成机制的讨论,表二维Ｒｏｓｓｂｙ波开的传播及外强迫引起的大气内部动力学过程虽夏季大气环流异常     

Supplementary description of Funchalia taaningi Burkenroad, 1940 (Crustacea,Decapoda, Penaeidae) from the Central Pacific Ocean and a new record of F. villosa (Bouvier, 1905) from the Eastern Indian Ocean

The pelagic penaeid shrimp Funchalia taaningi Burkenroad, 1940 is redescribed based on specimens collected mainly in the central Pacific Ocean. The petasma of the male is illustrated for the first time. The distribution of the species is extended into the eastern Indian Ocean based on a female collected in 1964 during the International Indian Ocean Expedition. Two males of Funchalia villosa (Bouvier, 1905), also collected during the International Indian Ocean Expedition, are recorded from the eastern Indian Ocean, extending the known distribution of this species.     

Four new species of Hargicotyle Mamaev, 1972 (Diclidophoridae) parasites on sciaenid fishes from Peru and Chile

Hargicotyle magna sp. nov., Hargicotyle paralonchuri sp. nov., Hargicotyle sciaenae sp. nov., from the gills of the Sciaenids Sciaena fasciata, Paralonchurus peruanus and Sciaena deliciosa, respectively, and Hargicotyle menticirrhi sp. nov. from the gill and mouth of Menticirrhus ophicephalus are described from the northern Chilean and central Peruvian coast. Distinct characteristics of the new species are the distribution of the vitelline follicles; the number and distribution of the testes, the size, shape and number of larval hooks; and the presence of one or two suckers in each clamp.     

Description of a new species of Haminoea (Gastropoda: Cephalaspidea) from India,with an account of the diversity of the genus in the Indo-West Pacific

In this paper current knowledge on the diversity of the gastropod cephalaspidean genus Haminoea from India is revised. A comprehensive literature review was undertaken and novel specimens were collected. Specimens from India were DNA barcoded using the gene cytochrome c oxidase sub-unit I and a Bayesian gene tree together with an Automatic Barcode Gap Discovery (ABGD) species delimitation analysis were inferred to compare Indian samples with species from the Indo-West Pacific. The most comprehensive DNA data set to date of the genus Haminoea is included and new morpho-anatomical features of Indo-West Pacific species were generated through fine anatomical work and scanning electron microscopy. A critical appraisal of previous records of the country is included and a new species, Haminoea aptei sp. nov., is described from the Andaman Islands and Lakshadweep Islands, India.

www.zoobank.org/urn:lsid:zoobank.org:pub:90C191A9-5CA6-4BC6-84E3-B1A26674FA1B     

不同平均强度热盐环流的年代际波动特征

基于美国国家大气研究中心的CCSM3(community climate system model version 3)模式,对淡水扰动试验下不同平均强度热盐环流(thermohline circulation,THC)的年代际波动特征及北大西洋气候响应特征进行研究。结果表明,百年以上尺度的THC变化对其年代际尺度波动产生显著影响,高平均强度下THC的年代际波动周期更长、更显著。对不同平均强度下北大西洋海、气要素与THC在年代际尺度上的相关分布进行分析,发现在高平均强度下,THC与海表温度(sea surface temperature,SST)的相关呈现为经向三核型分布,与海平面气压(sea lever pressure,SLP)的相关呈现为类NAO(North Atlantic oscillation)分布,而在低平均强度下,则不存在这2种模态分布;同时,在不同平均强度下,THC与各要素间的相关程度也不同,高平均强度下相关程度更高。