A coupled ice-ocean ecosystem model for 1-D and 3-D applications in the Bering and Chukchi Seas     

Clara Deal 《极地研究(英文版)》2008,19(2):218-229

Primary production in the Bering and Chukchi Seas is strongly influenced by the annual cycle of sea ice. Here pelagic and sea ice algal ecosystems coexist and interact with each other. Ecosystem modeling of sea ice associated phytoplankton blooms has been understudied compared to open water ecosystem model applications. This study introduces a general coupled ice-ocean ecosystem model with equations and parameters for 1-D and 3-D applications that is based on 1-D coupled ice-ocean ecosystem model development in the landfast ice in the Chukchi Sea and marginal ice zone of Bering Sea. The biological model includes both pelagic and sea ice algal habitats with 10 compartments： three phytoplankton （pelagic diatom, flagellates and ice algae： D, F, and Ai） , three zooplankton （copepods, large zooplankton, and microzooplankton ： ZS, ZL, ZP） , three nutrients （ nitrate ＋ nitrite, ammonium, silicon ： NO3 , NH4, Si） and detritus （Det）. The coupling of the biological models with physical ocean models is straightforward with just the addition of the advection and diffusion terms to the ecosystem model. The coupling with a multi-category sea ice model requires the same calculation of the sea ice ecosystem model in each ice thickness category and the redistribution between categories caused by both dynamic and thermodynamic forcing as in the physical model. Phytoplankton and ice algal self-shading effect is the sole feedback from the ecosystem model to the physical model.  相似文献   

Results of recent Pacific-Arctic ice-ocean modeling studies at the Naval Postgraduate School     

Jaclyn Clement Kinney  Wieslaw Maslowski 《极地研究(英文版)》2008,19(2):230-236

Summary of results from a high - resolution pan - Arctic ice - ocean model are presented for the northern North Pacific, Bering, Chukchi, and Beaufort seas. The main focus is on the mean circulation, communication from the Gulf of Alaska across the Bering Sea into the western Arctic Ocean and on mesoscale eddy activity within several important ecosystems. Model results from 1979 -2004 are compared to observations whenever possible. The high spatial model resolution at 1/12o （or -9 - km） in the horizontal and 45 levels in the vertical direction allows for representation of eddies with diameters as small as 36 km. However, we believe that upcoming new model integrations at even higher resolution will allow us to resolve even smaller eddies. This is especially important at the highest latitudes where the Rossby radius of deformation is as small as 10 km or less.  相似文献   

Numerical simulation research on multi-electrodes resistivity imaging survey array     

Jianjun NIU  Xiaopei ZHANG  Lizhi DU College of Construction Engineering  Jilin University  Changchun  China 《东北亚地学研究》2008,11(4):232-236

Multi-electrodes Resistivity Imaging Survey （MRIS） is an array method of electrical survey. In practice how to choose a reasonable array is the key to get reliable survey results. Based on four methods of MRIS such as Wenner, Schlumberger, Pole-pole and Dipole-dipole the authors established the model, by studying the result of the forward numerical simulation modeling and inverse modeling, and analyzed the differences among the different forms of detection devices.  相似文献   

f-3项与投影函数对电离层延迟的影响   总被引：1，自引：1，他引：0  

郑磊  陈锴  李征航  朱恒 《大地测量与地球动力学》2008,28(5)

依据Chapman正常电离层理论,构造Chapman剖面函数加权投影函数,给出VTEC三角多项式模型,并以武汉站2005年1月1日观测数据进行实例解算,分析电离层延迟f-3项、电离层单层高度、电离层投影函数形式等对电离层延迟的影响.  相似文献   

基于OpenGL的大规模三维地形场景的实时显示技术   总被引：2，自引：0，他引：2  

李海祥  祝茂良 《青海国土经略》2008,(5)

虚拟现实技术已经广泛应用于三维仿真、GIS、军事模拟等方面,然而大规模三维地形场景的快速绘制和实时显示却始终是个瓶颈问题.本文论述了运用OpenGL生成三维地形场景的关键技术,并深入探讨了基于矩形格网的视相关LOD模型的ROAM算法实现.  相似文献   

GPS水准高程拟合模型的实践和探讨     

谢旭阳 《现代测绘》2009,32(3):15-17

本文介绍了确定GPS正常高的常用方法--GPS水准高程,通过工程实例,得出各种常用拟合方法的适用范围及精度情况,通过对各种拟合模型进行详尽的对比分析,选择有助于高程拟合时选择适宜的拟合函数,获得满意的精度和结果.  相似文献   

3DGIS在公路设计工程中的应用     

秦红艳  任慧  周振红  王峰 《地理空间信息》2009,7(1):68-71

为了优化公路设计方法,探索了3DGIS技术在公路设计工程方面的应用。从公路设计中的道路选线优化、新设计道路的三维可视化以及土石方工程量的计算等几个方面研究了数字高程模型（DEM）与ArcGIS的三维分析模块在公路设计中的应用。再现了带状数字地面模型,为道路的平面选线工作提供了准确快速的坡度、坡向分析方法,通过行车模拟对道路设计效果进行评价。3DGIS技术辅助公路设计,使得公路设计方案更为直观、科学。  相似文献   

基于最小二乘配置法的沿海高程异常模型建立研究     

谢璧霞  曹敏  沈泉飞 《现代测绘》2009,32(5):3-4,25

陆海统一高程基准的关键是高程异常模型的建立,本文采用既考虑函数模型中非随机变量同时考虑随机部分的最小二乘配置法进行高程异常的拟合推估,建立区域高程异常模型,并与常用方法进行比较分析.以江苏沿海高程异常模型建立为例,研究得出不同拟合方法的拟合精度和残差图各有特点,最小二乘配置法的外部符合精度最高.  相似文献   

基于CCGIS的三维城市模璎数据生产     

向浩  喻鸣  刘波 《地理空间信息》2009,7(2):42-44

立足于生产实际阐述了一种基于CCGIS的三维城市生产工艺,重点说明了三维城市模型数据生产流程和控制,并结合恩施三维信息查询系统为例对该生产工艺进行验证。  相似文献   

地貌晕渲生成技术分析   总被引：1，自引：1，他引：0  

杨晓超 《地理空间信息》2009,7(5):138-141

通过对地貌晕渲生成技术方法的研究,重点讲述了ArcInfo和Atlas3D软件在生成地貌晕渲的主要过程,并分析了各自的特点,旨在通过技术交流,提高地貌晕渲图的生产效益和产品质量,  相似文献