Encyclopedia of Geochemistry

2018 Edition
| Editors: William M. White

Critical Zone

  • Justin B. RichardsonEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-3-319-39312-4_355

Synonyms

Earth’s critical zone

Definition

The critical zone, the near-surface terrestrial environment from the bottom of circulating groundwater to the top of vegetation, hosts the complex interactions involving rock, soil, water, air, and living organisms that regulate life-sustaining resources.

Introduction

The term “critical zone” was first applied to the surface terrestrial environment by Dr. Gail Ashley ( 1998) in a presentation at the Geological Society of America. In her work, Dr. Ashley introduced the concept of the critical zone when she wrote that a “holistic approach is needed to understand the three-dimensional complex linkages involving physical, chemical, and biological processes” and a study of geologic and surface processes that are “crucial for life” (Ashley 1998). In 2001, the United States National Research Council’s Committee on Basic Research Opportunities in the Earth Sciences noted the future importance of the critical zone concept as integrative of disciplines...
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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Dept. of Earth and Atmospheric SciencesCornell UniversityIthacaUSA