燕辽地区火山热液型铀－金－多金属矿床成矿特征

燕辽地区位于华北地台北缘东段，是我国著名的中生代火山热液型铀、金、多金属矿床成矿区。研究结果表明，其成矿作用受统一的晚中生代大陆裂陷火山岩浆活动控制；成矿时代集中在晚侏罗世及早白垩世；成矿介质为火山岩浆水、变质水和大气水混合的中温、中低温火山热液；成矿物质主要来自富集型的上地幔及下地壳。     

Last Glacial Maximum Sea Surface Temperatures: A Model-Data Comparison

In this study,the authors investigated changes in Last Glacial Maximum(LGM)sea surface temperature(SST)simulated by the Paleoclimate Modelling Intercomparison Project(PMIP)multimodels and reconstructed by the Multiproxy Approach for the Reconstruction of the Glacial Ocean Surface(MARGO)project,focusing on model-data comparison.The results showed that the PMIP models produced greater ocean cooling in the North Pacific and Tropical Ocean than the MARGO,particularly in the northwestern Pacific,where the modeldata mismatch was larger.All the models failed to capture the anomalous east-west SST gradient in the North Atlantic.In addition,large discrepancies among the models were observed in the mid-latitude ocean,particularly with models in the second phase of the PMIP.Although these models showed better agreement with the MARGO,the latest models in the third phase of the PMIP did not show substantial progresses in simulating LGM ocean surface conditions.That is,improvements in the modeling community are still needed to describe SST for a better understanding of climate during the LGM.     

组合码和相位观测值在线解双差模糊度的算法

如何在线精确地求解整周模糊度,是ＧＰＳ高精度动态相对定位的关键问题。在线解算取决于很多因素：基线长度、数据处理方法、接收机的性能（如双频还是单频）以及抗ＡＳ和ＳＡ的能力等。现代双频ＧＰＳ接收机能获得载波相位和Ｌ１、Ｌ２频道上的精度伪距观测值,组合这４个观测值可进行单历元整周模糊度解算。文中对组合码和相位观测值在线解整周度的算法进行了试验和分析,得出了很有实用意义的结合。     

长白山生态景观格局动态变化分析

长白山独特的地质和地理条件,形成了特有的自然景观,植被垂直带谱在亚洲具有代表性。通过1977年MSS、1985年TM及1999年TM三期遥感影像,结合实地调查建立解译标志,进行分类并计算景观指数,分析了长白山地区近30年来的景观结构变化。分析表明：从景观面积变化率来看,1977-1985年间,水体、苔原、居民点、针叶林和草地的面积减少,耕地和针阔混交林的面积增加显著,阔叶林、岳桦林、道路、裸地增加;1985-1999年间,水体、裸地、针阔混交林和阔叶林的面积减少,其他类型面积增加。景观格局变化表明,人为活动对景观格局产生的影响,已成为景观格局变化的主要驱动因子。     

青藏高原狮泉河-康西瓦地区 1:100万区域重力调查成果

利用最新取得的区域重力资料,参考航磁、遥感、区域地质资料,对青藏高原狮泉河-康西瓦地区重力场分区、断裂构造体系、构造单元、局部异常、深部构造、成矿远景区(带)等进行了研究.对阿尔金走滑断裂西南端的走向和延伸提出了一些新的看法;讨论了2条重力低值带的成因;推断了班公湖-怒江结合带下部莫霍面隆起的高度,从重力角度提出了对班公湖-怒江结合带的认识;认为青藏块体在拼合后地壳有2个加厚中心;新圈定了一个中、新生代沉积盆地,并进行了初步研究;结合地质、矿产、航磁等资料,初步划分出4个成矿远景区(带).     

霍州矿区隐伏断裂（带）活动性氡气测试成果解释分析

采用断层气体测试方法,对霍州盆地矿区内几条主要的隐伏断裂（带）及其活动性进行了测试。进而对该区典型的氡气测试成果剖面作了解释分析,并判别了隐伏断裂（带）的空间分面具主其相对活动强弱与活动水平等有关断裂活动性问题。     

野外型断层活动连续监测系统

介绍野外型断层活动连续监测系统的组成、布设及主要技术指标。     

中国陆地生态系统净初级生产力时空特征模拟

In this paper,we use CEVSA,a process-based model,which has been validated on regional and global scales,to explore the temporal and spatial patterns of Net Primary Productivity (NPP) and its responses to interannual Climate fluctuations in China‘‘‘‘‘‘‘‘s terrestrial ecosystems over the period 1981-1998,The estimated results suggest that ,in this study period,the averaged annual total NPP is about 3.09 Gt C/yr^-1 and average NPP is about 342 g C/m^2,The results also showed that the precipitaion was the key factor determining the spsatial distribution and temporal trends of NPP. Temporally,the total NPP exhibited a slowly increasing trend.In some ENSO years( e.g.1982,1986,1997)NPP decreased clearly compared to the previous year,but the relationship between ENSO and NPP is decreased clearly compared to the previous year,but the relationship between ENSO and NPP is complex due to the integrated effects of monsoons and regional differentiation. Spatially,the relatively high NPP occurred at the middle high latitudes,the low latitudes and the lower appeared at the middle latitudes,On national scale,precipitaion is the key conntro factor on NPP variations and there exists a weak correlation between NP and temperature ,but regional responses are greatly different.     

残障人士在景区就业有可能性吗？

为探索残障人士在旅游景区就业的可能性,应用刻板印象研究中的BIAS Map（Behaviors from Intergroup Affect and Stereotypes Map）模型,基于对多个景区游客的问卷调查,运用方差分析和线性回归,剖析游客对旅游景区残障员工的态度及群际接触因素对游客态度的影响。研究表明,从游客态度角度看,残障人士在旅游景区工作有其可能性。其原因是：游客对旅游景区雇佣的残障员工总体上持高热情、低能力的刻板印象,会唤醒游客对残障员工的钦佩情绪及采取被动助长残障员工的行为;在排除人口统计特征的影响下,接受过残障人士的服务、与残障人士高频率接触会显著唤醒游客对残障员工的积极情绪。建议强化地方政府在促进残障人士就业过程中的主导作用,倡导景区雇佣残障人士,重视“全国助残日”等节日契机,促进公众与残障群体多方式、高频率的接触,从而减少社会偏见,构建和谐社会。     

Soil organic carbon storage and soil CO<Subscript>2</Subscript> flux in the alpine meadow ecosystem

High-resolution sampling, measurements of organic carbon contents and ¹⁴C signatures of selected four soil profiles in the Haibei Station situated on the northeast Tibetan Plateau, and application of ¹⁴C tracing technology were conducted in an attempt to investigate the turnover times of soil organic carbon and the soil-CO₂ flux in the alpine meadow ecosystem. The results show that the organic carbon stored in the soils varies from 22.12×10⁴ kg C hm⁻² to 30.75×10⁴ kg C hm⁻² in the alpine meadow ecosystems, with an average of 26.86×10⁴ kg C hm⁻². Turnover times of organic carbon pools increase with depth from 45 a to 73 a in the surface soil horizon to hundreds of years or millennia or even longer at the deep soil horizons in the alpine meadow ecosystems. The soil-CO₂ flux ranges from 103.24 g C m⁻² a⁻¹ to 254.93 gC m⁻² a⁻¹, with an average of 191.23 g C m⁻² a⁻¹. The CO₂ efflux produced from microbial decomposition of organic matter varies from 73.3 g C m⁻² a⁻¹ to 181 g C m⁻² a⁻¹. More than 30% of total soil organic carbon resides in the active carbon pool and 72.8%281.23% of total CO₂ emitted from organic matter decomposition results from the topsoil horizon (from 0 cm to 10 cm) for the Kobresia meadow. Responding to global warming, the storage, volume of flow and fate of the soil organic carbon in the alpine meadow ecosystem of the Tibetan Plateau will be changed, which needs further research. Supported by the National Natural Science Foundation of China (Grant Nos. 40231015, 40471120 and 40473002) and the Guangdong Provincial Natural Science Foundation of China (Grant No. 06300102)