"01.19"区域暴雪天气过程的数值诊断分析

对2006年1月18日-19日山西中南部区域暴雪天气过程从垂直环流结构、形成机制、螺旋度数值诊断等方面进行了分析,得出：暴雪发生在高空极涡加强南压期间,北路强冷空气直灌山西,受700hPa西北涡东移影响所致。暴雪区上空,垂直螺旋度柱为上正下负,正螺旋度柱的两个中心分别位于300hPa和500hPa,在500hPa出现了强度高达14×10^-6m·s^-2的强中心,负螺旋度柱中心相对较弱。垂直螺旋度强度的变化对暴雪的出现有明显指示意义。涡散场的分布存在“高空辐散、低层辐合”的垂直配置,暴雪出现在500hPa涡度梯度最大的地方,暴雪出现12h后,正涡度中心强度迅速增强,对应暴雪出现一个增幅期。暴雪区上空,锋面坡度较大,湿层厚度达到600hPa左右,整个系统深厚稳定。低空、超低空急流的存在,不仅为暴雪提供了水汽来源和热量输送,而且使得重力惯性波不稳定发展,是强降雪的重要触发机制。     

大亚湾珊瑚礁痕量金属的研究

作者采用阳极溶出伏安法测定大亚湾珊瑚礁痕量金属铜、铅、镉的含量 ,并讨论了相关的影响因素。测定结果发现 :A组、B组珊瑚礁礁体中铜、铅、镉的含量从里到外有递增的趋势 ,这与近年来大亚湾水体中铜、铅、镉含量的变化是一致的。而 A组珊瑚礁变化明显 ;B组珊瑚礁礁体中铜、铅、镉含量呈现较复杂的变化。分析认为 ,这是因珊瑚礁的形成受多种因素影响所致 :(1)海水组成对珊瑚礁化学成分的影响 ;(2 )海洋生物种类、数量及其矿物组成是制约元素分布的主要因素 ;(3)陆源碎屑组分对大亚湾珊瑚礁的化学组成有一定的影响。各因素在不同情况下所起的作用不同。     

Study on copper complexing ligand concentrations in several China''s coastal waters

Copper complexing ligand concentrations in the Daya Bay, Qingdao coast, Jiaozhou Bay, South China Sea and Huanghe Estuary waters were determined by the anodic stripping voltammetry technique. The distribution regularity and the relationship with other parameters were discussed. The results were as follows： Copper complexing ligand concentrations of the South China Sea were a little higher than those of other sea areas, and they were apparently higher than those of the ocean. Compared with the subsurface layer （SSL） in the sea surface microlayer copper complexing ligand concentrations showed an enrichment phenomenon, of which the mechanism is similar to dissolved organic matter. The metal complexing ligand concentration profiles of the South China Sea showed that the value in the sea surface was the highest, then it decreased with depth accruing, and a higher value appeared at the bottom. Copper complex- ing ligand concentrations were higher than those of cadmium and lead. Ligands in each sea area exhibited a complicated property. In short, the distribution regularity of copper complexing ligand concentrations in China＇s coastal waters was consistent with that of other regions in the world. Meanwhile, the positive relationship between the copper complexing ligand concentrations and biological oxygen demand, chemical oxygen demand, dissolved organic carbon, and viscosity were found clearly.     

Study on copper complexing ligand concentrations in several China’s coastal waters

1 Introduction It is well established that trace metals can exist in the environment for a long time, which will affect the ecosystem greatly (Baeyens et al., 1998; Kremling, 1983; Rozen et al., 2000). The transport, bioavailabili- ty, fate and toxicity o…     

The intraseasonal oscillations of precipitation and circulations from January to March in 2010 in East Asia

The rainfall from January to March in 2010 in East Asia is positive anomaly and the temporal evolution characteristics present the cycle of 20–40 days. In the present paper, the low-frequency circulations and its formation mechanism are analyzed. The results show that during the peak rainfall phase, the upstream of the rainfall regions is controlled by low-frequency cyclone, and the downstream is controlled by low-frequency anticyclone in the middle and low troposphere. In the upper troposphere, the westerly jet presents the oscillation characteristics between the north and the south. Both the integrated (from the surface to 100 hPa) diabatic heating and the horizontal vorticity advection contribute to the vertical velocity. In addition, the vorticity vertical advection has effects on the vertical speed, which is a self-feedback process. The latent heating in the precipitation has influences on the westerly jet in the upper troposphere. The interactions between the precipitation and the westerly jet are mainly manifested as the intraseasonal oscillations.     

莱西市砂礓黑土综合改良研究

砂礓黑土占莱西市总耕地面积的34.1%,面积大且分布广,根据砂礓黑土所处自然条件、形成和分布,全面科学地分析了砂礓黑土低产的原因,结合科学试验,提出了增施有机肥、科学施肥等综合改良措施。     

夏津县国土空间基础信息平台系统设计及关键技术

本文结合夏津县自然资源信息化工作实际需求,充分利用该县现有的规划和国土资源大数据中心建设成果,对该县国土空间基础信息平台的总体架构设计、数据库设计以及功能设计进行了介绍,重点探讨了平台建设中应用到的基于大数据的空间数据管理、基于微服务架构和云服务管理支撑、统一门户管理和统一运维管理三项关键技术,解决了空间数据高质量管理和应用、业务应用的多变性、系统应用安全等相关难点。平台经试运行测试,系统功能完善、运行稳定,能满足全县自然资源和规划系统业务应用需求,大大推进了全县自然资源数据更新维护机制,实现了自然资源数据共建共享和政务办公高效集约自主化,为其他地区国土空间基础信息平台的建设提供参考。     

陆相断陷盆地陡坡带早期大型斜向扇三角洲的发现及其勘探潜力

现今我国东部断陷盆地油气勘探已达到较高的程度,目的 层系逐渐向深部转移,是东部断陷盆地下一步主要勘探方向之一.断陷湖盆陡坡带早期发育短轴物源形成的垂直于边界断层的近岸水下扇、扇三角洲和湖底扇,但对于陡坡带其他方向的沉积相类型及其勘探潜力研究较少.本文依据断陷湖盆沉积学原理,采用地震地层学方法,对我国东部典型断陷湖盆陡坡...