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湖泊数据库
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  lake database
     On the Design of China Lake Database
     中国湖泊数据库的设计
短句来源
     DETAILED ANALYSIS ON DATA STRUCTURE OF LAKE DATABASE
     湖泊数据库数据结构详析
短句来源
     Lake database supplies quantitative analysis and macro decision-making with plentiful basic data.
     湖泊数据库为湖泊科学定量化研究、宏观决策分析提供了丰富的基础数据。
短句来源
     It is much difficult to know how to retrieve the information of lake database and serve application targets for those who do not understand data structure of lake database.
     对于如何提取数据库信息,为应用目的服务,必须了解湖泊数据库数据结构。
短句来源
     Expounding the base and character of original Chinese Lake Database, linking up the progress of information Technology and Geographic information System, bringing forward the new concept of Chinese Lake information System in the age of internet, discussing the constructive model of lake information system based on WWW and service model based on Client/Server, and solving some key technique problems of the lake information system based on WWW.
     本文阐述了中国湖泊数据库原有基础与特点,结合近年来信息技术(IT)和地理信息系统(GIS)的进展、提出了英特网时代中国湖泊信息系统的新概念,探讨以万维网(WWW)为平台的湖泊信息系统组织模型与客户机-服务器为基础的服务模型,并解决了基于万维网的湖泊信息系统的若干关键技术问题
短句来源
更多       
  lake data base
     On the Design of China Lake Database
     中国湖泊数据库的设计
短句来源
     DETAILED ANALYSIS ON DATA STRUCTURE OF LAKE DATABASE
     湖泊数据库数据结构详析
短句来源
     Lake database supplies quantitative analysis and macro decision-making with plentiful basic data.
     湖泊数据库为湖泊科学定量化研究、宏观决策分析提供了丰富的基础数据。
短句来源
     It is much difficult to know how to retrieve the information of lake database and serve application targets for those who do not understand data structure of lake database.
     对于如何提取数据库信息,为应用目的服务,必须了解湖泊数据库数据结构。
短句来源
     Expounding the base and character of original Chinese Lake Database, linking up the progress of information Technology and Geographic information System, bringing forward the new concept of Chinese Lake information System in the age of internet, discussing the constructive model of lake information system based on WWW and service model based on Client/Server, and solving some key technique problems of the lake information system based on WWW.
     本文阐述了中国湖泊数据库原有基础与特点,结合近年来信息技术(IT)和地理信息系统(GIS)的进展、提出了英特网时代中国湖泊信息系统的新概念,探讨以万维网(WWW)为平台的湖泊信息系统组织模型与客户机-服务器为基础的服务模型,并解决了基于万维网的湖泊信息系统的若干关键技术问题
短句来源
更多       
  “湖泊数据库”译为未确定词的双语例句
     STUDIES ON GLOBAL LATE QUATERNARY LAKE-LEVEL DATA BASES
     全球晚第四纪湖泊数据库的研究
短句来源
     One of Keys to Predict the Future Climate-Studies on the comparisons of palaeo-AGCMs and lake-level data bases
     预测未来气候的钥匙之一——古气候模型与湖泊数据库的对比研究
短句来源
     THE GEOLOGICAL EVIDENCE OF THE GLOBAL MOISTURE CONDITION CHANGES SINCE THE LAST GLACIAL MAXIMUM:THE CONSTRUCTION OF GLOBAL LAKE STATUS DATA BASE & THE SYNTHESIS IN THE LARGE SPATIO-TEMPORAL SCALE
     末次盛冰期以来全球湿润状况的地质证据──全球古湖泊数据库及其湖水位变化的大尺度时空分析
短句来源
     This thesis focuses on the establishment of the Chinese Lake Status Data Base (CLSDB). and relative study on the palaeoclimate and palaeoenvironment, including the following four respects:(1) The establishment of CLSDB and its role in the research of palaeoclimate in East Asia.
     本篇博士学位论文主要是关于中国晚第四纪古湖泊数据库(CLSDB)的建立及相关的古气候环境研究,具体包括以下四个方面的研究内容:(1) 中国晚第四纪古湖泊数据库的建立及其在东亚区古气候研究中的应用。
短句来源
     The 42 lakes compiled in the Chinese Lake Status Data Base (CLSDB) , has provided the information of the spatial changes of lake status for each one-thousand year, which can be purposed for research on the atmospheric circulation changes of Chinese region since LGM.
     中国古湖泊数据库收录的42个湖泊,提供的湖泊水量每千年变化的空间信息,可以用来系统分析中国区域末次冰盛期以来大气环流变化的状况.
短句来源
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  lake database
Other important sources of regional water composition information exist Salt lake Figure 14 Salt lake database.
      


Lake database supplies quantitative analysis and macro decision-making with plentiful basic data. It is much difficult to know how to retrieve the information of lake database and serve application targets for those who do not understand data structure of lake database. This paper discribes types of lake data in brief, analyses the data structure of space and non-space information of lake data, especially explains the data file of related database in details. In the lake data base, space data indude points,...

Lake database supplies quantitative analysis and macro decision-making with plentiful basic data. It is much difficult to know how to retrieve the information of lake database and serve application targets for those who do not understand data structure of lake database. This paper discribes types of lake data in brief, analyses the data structure of space and non-space information of lake data, especially explains the data file of related database in details. In the lake data base, space data indude points, arcs and polygons having topological structure. And, none-space data include four kinds of data which are physical, hydrological, biological, and chemical factors. Non-space data, here, are stored in the database with relation data structure like that used in Foxbase. Finally, a minute description of the data structure, and a source program to retrieve data file with C language are given.

湖泊数据库为湖泊科学定量化研究、宏观决策分析提供了丰富的基础数据。对于如何提取数据库信息,为应用目的服务,必须了解湖泊数据库数据结构。本文概略地描述了湖泊数据信息种类,分析了湖泊空间信息和非空间信息的数据结构,尤其对关系数据库数据文件作了详细剖析,给出了调用数据文件的C语言源程序。

Fluctuations of lake status reflect changes in water balance of precipitation minus evaporation (P-E) over a catchment. The ancient lake status can provide information of precipitation and humidity during the late Quaternary. Synchronous changes in regional lake status may keep lake levels from being influenced by non-climatic factors or local factors. The recognition that lake data could be used to reconstruct past regional climate changes leads to the construction of a global lake-level data base. Nowadays,...

Fluctuations of lake status reflect changes in water balance of precipitation minus evaporation (P-E) over a catchment. The ancient lake status can provide information of precipitation and humidity during the late Quaternary. Synchronous changes in regional lake status may keep lake levels from being influenced by non-climatic factors or local factors. The recognition that lake data could be used to reconstruct past regional climate changes leads to the construction of a global lake-level data base. Nowadays, Quaternary lake status data bases have played a key role in reconstructions of continental-scale atmospheric circulation patterns and are used to compare and evaluate the simulations of precipitation and P-E from the atmospheric general circulation models.Lake records from North Eurasia show regionally-coherent patterns of changes during the late Quaternary. Lakes, peripheral to the Scandinavian ice sheet, were lower than today at the glacial maximtim, but high in the Mediterranean zone, reflecting the dominance of glacial anticyclonic conditions in North Europe and a southward shift of the westerlies. The influence of the glacial anticyclonic circulation attenuated in the late glacial period, and the westerlies gradually shifted northward. so that drier conditions in south of the ice sheet were confined to a progressively narrower zone in North Europe, and the Mediterranean zone became drier. During the Holocene. there was a gradual shift to conditions wetter than present in central Asia, associated with the expanded Asian monsoon, and in the Mediterranean, in response to a local, monsoontype circulation. Conditions were drier in North Europe, reflecting the increased incidence of blocking anticyclones centred on Scandinavia. Conditions in the interior of North Eurasia were similar or slightly wetter than present. likely associated with cyclonic activity on the downstream limb of the summer anticyclone in the west and monsoon penetration in the east. These reflect thechanges in insolation and glacial boundary conditions.Simulations of the response to insolation forcing at 6000 yrBP made with five different AGCMs show sorne common features, e. g. more humid than today in the mid-latitudes of Eurasian continent, enhancement of the Afro-Asian monsoons, drier conditions in North Europe but wetter conditions in the Mediterraneanregion. By comparing the lake data with simulated P -E fields basis can be provided forunderstanding the observed climatic changes and for evaluating the climate model simulations.Thus the paper introduced the work on European lake status database, and discussed the basis. methods and applications of the data bases, in order to improve work on the Chinese data base and speed the global data base.

湖泊水位升降反映了流域降水与蒸发的水量平衡变化。古湖面变化能够提供晚第四纪以来降水和湿度变化的气候信息。区域性湖泊水位的同步变化可以过滤掉个别湖泊受局部地域影响的水面变动,从而反应出较大范围的气候变化。建立区域性乃至全球性的古湖泊数据库反映这样的客观要求。目前,湖泊数据库在大陆尺度上恢复晚第四纪以来大气环流类型和在对比全球古大气环流模型中发挥着积极作用。本文通过作者近年来对欧洲古湖泊数据库的研究,介绍建立湖泊数据库的基础、方法和应用。希望藉此能够促进中国晚第四纪湖泊数据库的研究,并以此推动建立全球晚第四纪湖泊数据库的进展。

The construction of global lake status data base has been introduced in this paper. This is a geological evidence-based semi-quantitative lake level data set. It consists of 6 regional lake status data sets, i. e. Oxford Lake Level Data Base, European Lake Status Data Base,Former Soviet Union and Mongolian Data Base, Updated African Lake Status Data Base and Chinese Lake Level Data Base. With uniform criteria, these sub-data-sets are incorporated into the Global Lake Status Data Base. The lake status record...

The construction of global lake status data base has been introduced in this paper. This is a geological evidence-based semi-quantitative lake level data set. It consists of 6 regional lake status data sets, i. e. Oxford Lake Level Data Base, European Lake Status Data Base,Former Soviet Union and Mongolian Data Base, Updated African Lake Status Data Base and Chinese Lake Level Data Base. With uniform criteria, these sub-data-sets are incorporated into the Global Lake Status Data Base. The lake status record from the Global Lake Status Data Base essentially reflect the coherent patterns of changes in moisture condition in the spatio-temporal scale since the last glacial maximum. In the present. lakes from low and mid latitudes are characterised by lower status whereas the lakes in high latitudes register higher lake status. From the Last Glacier Maximum to the middle Holocene, the lakes from North America register high in cool period to low in Holocene, indicating the changes in moisture condition from wetter to drier. The culminating dry period occurs in mid-Holocene.This change pattern of moisture condition is associated with the shift of westerlies related to the presence and non-presence of ice sheet in the North America. In the Afro-Asia monsoonal sector, the lake status are characterised by lower in the cool period and higher in warm period, particularly in the early Holocene. The higher Iake status from monsoonal sector in early Holocene maintained until mid-Holocene is strongly linked with the increase in summer insolation in Northern Hemisphere. It, therefore, enhances the contrast of land-ocean thermal property, produces the strengthened monsoonal stream jet. The moisture condition changes in the mid-latitude in northern Hemisphere, including the midst of N. America and circum-Mediterranean, are related to the presence of ice sheet in the north and the displacement of the westerlies. But the lake status records in Central Asia show that the culmination of wetter condition appears in the middle Holocene rather than in the early Holocene, which indiactes that the enhanced summer monsoon started to prevail in the low-latitudinal areas in the early Holocence, then gradually expanded northward to experience in the mid-latitude in the middle Holocene.

介绍了正在建设中的全球湖泊数据库的情况,以及该数据库的水位资料所反映的晚更新世末期以来全球湿润状况的变化。通过大尺度湖水位变化的时空分析,结果显示当今湖泊水位状态较历史时期而言,位于低纬干旱或半干旱地区的湖泊水位较低,而中纬及高纬湿润地区的湖泊水位较高。自末次冰盛期以来,北美大陆中南部地区湖泊水位自高至低,反映出该地区气候条件由湿变干,至早、中全新世达最干旱。而在非洲及南亚季风地区,冷期偏干,暖期偏湿。特别是在早、中全新世的温暖时期,为历史上最湿润时期。北半球中纬度地带的气候干湿变化与北半球冰盖的存在及其消融导致的西风带的南北摆动有关;而北半球季风区在早、中全新世出现的高潮面与北半球夏季辐射的增加有密切联系。

 
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