The Development of a New Generation Gravity Map of Antarctica

9725374贝尔该项目的目标是开发一个基于网络的南极重力数据库，以便在全球范围内促进在南极研究中科学使用重力数据。这一汇编将为南极地球科学界提供一个重要的新工具，从地质学家在区域范围内进行实地观测到地震学家研究大陆尺度的地幔结构。重力数据库将补充正在进行的编制新的大陆基岩(BEDMAP)和南极地磁(ADMAP)地图的平行项目。一项国际努力将与这些正在进行的项目同时进行，包括联系南极地球物理界，确定现有数据集，商定使用数据库数据的协议，并最终编制新的大陆比例尺重力图。该项目有三个主要阶段。第一阶段将调查目前可用的高分辨率卫星重力数据的精度和分辨率，并量化精度和分辨率的空间变化。该项目的第二阶段将开发一种交互方法，通过基于Web的界面访问现有的卫星、舰载、陆基和空中重力数据。Lamont-Doherty地球天文台山脊多波束测深数据库将用作该项目的模板。现有的在线Ridge数据库允许用户访问海底地形的原始数据、网格数据和栅格图像。现有的南极重力数据也将产生类似的结构。该项目的第三阶段将是制定一项国际计划，以汇编60S以南现有的重力数据。该项目将与ADMAP和BEDMAP努力的领导人以及SCAR的适当工作组进行讨论。现有重力数据的初步地图将于1999年在惠灵顿举行的南极地球科学会议上提出。将在惠灵顿会议的同时举行一次重力工作组会议，以就将数据放入数据库的协议达成共识。到该项目完成时，将查明现有的重力数据，并确定将这些数据放入在线数据库的国际协议。随着更多数据的出现，将重力数据存入数据库的过程将是一个持续进行的项目。

9725374 Bell The goal of this project is to develop a Web-based Antarctic gravity database to globally facilitate scientific use of gravity data in Antarctic studies. This compilation will provide an important new tool to the Antarctic Earth science community from the geologist placing field observations in a regional context to the seismologist studying continental scale mantle structure. The gravity database will complement the parallel projects underway to develop new continental bedrock (BEDMAP) and magnetic (ADMAP) maps of Antarctica. An international effort will parallel these ongoing projects in contacting the Antarctic geophysical community, identifying existing data sets, agreeing upon protocols for the use of data contributed to the database and finally assembling a new continental scale gravity map. The project has three principal stages. The first stage will be to investigate the accuracy and resolution of currently available high resolution satellite derived gravity data and quantify spatial variations in both accuracy and resolution. The second stage of this project will be to develop an interactive method of accessing existing satellite, shipboard, land based, and airborne gravity data via a Web based interface. The Lamont-Doherty Earth Observatory RIDGE Multi-beam bathymetry database will be used as a template for this project. The existing online RIDGE database allows users to access the raw data, the gridded data and raster images of the seafloor topography. A similar structure will be produced for the existing Antarctic gravity data. The third stage of this project will be to develop an international program to compile existing gravity data south of 60 S. This project will be discussed with leaders of both the ADMAP and BEDMAP efforts and the appropriate working groups of SCAR. A preliminary map of existing gravity data will be presented at the Antarctic Earth Science meeting in Wellington in 1999. A gravity working group meeting will be held in conjunction with the Wellington meeting to reach a consensus on the protocols for placing data into the database. By the completion of the project, existing gravity data will be identified and international protocols for placing this data in the on-line database will have been defined. The process of archiving the gravity data into the database will be an ongoing project as additional data become available.