Global Change Master Directory, US National Aeronautics and Space Administration (NASA)

Our goal is to enable users to locate and obtain access to Earth science data sets and services relevant to global change and Earth science research. The GCMD database holds more than 25,000 descriptions of Earth science data sets and services covering all aspects of Earth and environmental sciences. Datasets covers diverse topics: Agriculture, Atmosphere, Biological Classification, Biosphere, Climate Indicators, Cryosphere, Human Dimensions, Land Surface, Oceans, Paleoclimate, Solid Earth, Spectral/Engineering, Sun-Earth Interactions, and Terrestrial Hydrosphere. The mission of the Global Change Master Directory is to offer a high quality resource for the discovery, access, and use of Earth science data and data-related services worldwide, while specifically promoting the discovery and use of NASA data. The directory resource is targeted to serve as a valued location for sharing data from multinational sources and, in turn, will contribute to scientific research by providing stewardship of metadata and direct access to Earth science data and services. We encourage your participation in writing and maintaining the information in our databases. Subscription services are available to notify you of new entries. The Committee on Earth Observation Satellites (CEOS) International Directory Network (IDN) Interoperability Forum is available to discuss content and database issues.

本项目旨在助力用户查找并获取与全球变化及地球科学研究相关的地球科学数据集与服务。全球变化主控目录（Global Change Master Directory，简称GCMD）数据库收录了超过2.5万条地球科学数据集与服务的描述信息，覆盖地球与环境科学的全部领域。该目录收录的数据集涵盖多元主题：农业、大气、生物分类、生物圈、气候指标、冰冻圈、人类维度、陆面、海洋、古气候、固体地球、光谱/工程、日地相互作用以及陆地水圈。全球变化主控目录的使命是打造高质量资源，以供全球范围内的用户发现、获取并使用地球科学数据及相关数据服务，同时重点推广美国国家航空航天局（National Aeronautics and Space Administration，NASA）数据的发现与利用。本目录旨在成为跨国源数据共享的重要平台，并通过对元数据进行管理以及提供地球科学数据与服务的直接访问渠道，助力科学研究工作。我们诚邀您参与本数据库信息的撰写与维护工作。本平台提供订阅服务，可向您推送新条目更新通知。地球观测卫星委员会（Committee on Earth Observation Satellites，CEOS）国际目录网络（International Directory Network，IDN）互操作论坛可用于探讨内容与数据库相关议题。