Download or read book A New Map of Global Ecological Marine Units written by and published by . This book was released on 2017 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: The U.S. Geological Survey (USGS), Esri, the Group on Earth Observations (GEO), and the American Association of Geographers (AAG) are pleased to present A New Map of Global Ecological Marine Units - An Environmental Stratification Approach. This publication presents maps, data, and a web-based explorer application from a first-of-its-kind effort to partition the ocean into physically and chemically distinct volumetric regions called ecological marine units (EMUs). The EMUs were mapped from sea surface to seafloorin a true three-dimensional characterization of the oceanic water column. The EMUs were developed in a public/private partnership between USGS and Esri, in a collaboration that included a steering committee of international marine scientists. The work to delineate the EMUs follows the development of an analogous global ecological land units (ELUs) product also developed by the ESGS/Esri team, using a similar stratification-based mapping approach. Like the ELUs, the EMUs were commissioned by the GEO as part of a global ecosystem mapping initiative. With this Special Publication, AAG recognizes the work as a contribution to understanding the physical and ecological geography of the Earth.