LZY1—1型光电浊度仪

本文介绍了LZY_(1-1)型光电浊度仪的设计原理,标定方法及使用结果,该仪器用经典法校准后,能快速测量大批量样品的悬浮物含量。     

基于GeoDA-GIS的四川省县域经济空间分异研究

选取14项经济指标,构建一个充分反映县域经济发展水平的指标体系,采用因子分析法,结合探索性空间数据分析(ESDA)方法与GIS、GeoDA空间分析工具,得出四川县域经济发展水平的差异性及空间分异特征。结果表明,四川省181个县域单元的经济差异较大,总体上,经济发达县域处于川东盆地区,经济落后县域分布于川西高原区;全局自相关特征明显,全局Moran s I指数达0.634 4,县域经济发展水平存在显著的空间集聚特征;局部空间自相关分析和Moran聚集图、LISA聚集图更具体、直观地显示了县域经济空间集聚位置和分布特征,进一步揭示了四川县域经济发展的热区和盲区。     

浅议我国北方地区的沙漠化问题

本文根据作者在我国沙漠地区的多年研究工作,对沙漠化的概念含义、我国沙漠化的成因和沙漠化现状等问题提出了看法。     

New progress of research on water cycle in atmosphere in China

New progresses are introduced briefly about the water cycle study on atmosphere of China made in recent years. The introduction includes eight aspects as follows: 1) precipitation characteristics, 2) stability of climatic system, 3) precipitation sensitive region, 4) regional evaporation and evapotranspiration, 5) water surface evaporation, 6) vegetation transpiration, 7) cloud physics, and 8) vapor source.     

Why are halo coronal mass ejections faster?

Halo coronal mass ejections (CMEs) have been to be significantly faster than normal CMEs, which is a long-standing puzzle. In order to solve the puzzle, we first investigate the observed properties of 31 limb CMEs that clearly display loopshaped frontal loops. The observational results show a strong tendency that slower CMEs are weaker in white-light intensity. Then, we perform a Monte Carlo simulation of 20000 artificial limb CMEs that have an average velocity of ～523km s -1. The Thomson scattering of thes...     

Variability of atmospheric freezing level height derived from radiosonde data in China during 1958–2005 and its impact to cryosphere changes

Atmospheric air temperature data from 92 stations in China’s radiosonde network were used to analyze changes in the freezing level height (FLH), glacier snow line, and ice edge from 1958–2005 (48 years) and to examine the impact of these changes on the cryosphere. In general, the FLH, glacier snow line, and ice edge exhibited latitudinal zonation, declining from south to north. Trends in the FLH, glacier snow line, and ice edge showed spatial heterogeneity during the study period, with prevailing upward trends. Temporally, the FLH, glacier snow line, and ice edge trends differed on various time scales.     

变质岩的变质序列分析──以辽河群为例

通过对辽河群岩石中主要变质矿物的观察和研究，以岩石的变形历史作为变质结晶作用的相对时标，确定了矿物生长的时序特征及其演化过程。发现变质与变形既是有密切联系的又是各自独立的地质作用，辽河期的变形作用存在明显的３个变形幕，而辽河期的变质作用是个连续的完整的过程，无明显的热波动。变质作用高峰和变形作用高峰存在时间差。     

Inversion of two-dimensional tidal open boundary conditions of M<Subscript>2</Subscript> constituent in the Bohai and Yellow Seas

Two-dimensional tidal open boundary conditions of the M2 constituent in the Bohai and Yellow Seas(BYS) have been estimated by assimilating T/P altimeter data.During inversion,independent point(IP) strategy was used,in which several IPs on the open boundary is assumed,values at these IPs can be optimized with an adjoint method,and those at other grid points are determined by linearly interpolating the values at IPs.The reasonability and feasibility of the model are tested by ideal twin experiments.In the practical experiment(PE) after assimilation,the cost function may reach 1% or less of its initial value.Mean absolute errors in amplitude and phase can be less than 5 cm and 5°,respectively,and the obtained co-chart can show the character of the M2 constituent in the BYS.The results of the PE indicate that using only two IPs on the open boundary can yield better simulated results.     

卫星遥感海表温度反演结果再处理研究

针对东海渔区的海洋渔业应用,以中国东海渔区(121°～124°E,29°～32°N)NOAA level-2B SST反演数据为例,通过不同空间内插方法的对比分析,得到最优内插模型,继而获取海表温度图像和海温等值线图,为海洋渔业提供必要的基础资料.     

青岛冷水团的消亡机理研究

本文基于多年月平均水温资料,分析了青岛冷水团的长消过程,并利用气候态月平均大气数据和数值模拟结果,探讨了青岛冷水团的消亡机理。结果表明,青岛冷水团3月出现,4月成型,5月最盛,6月减弱,7月消失;南黄海6-7月间偏南风的增强和温跃层以下反气旋涡的减弱是青岛冷水团消亡的动力机制,而海面净热通量的下传和水平热量的输入则是青岛冷水团消亡的热力机制。