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Earth System Physics

by Charlie Zender

provides a set of Freely Available Community Texts related to earth system physics, all published under the GNU Free Document License:

1. Radiative Transfer in the Earth System

2. Natural Aerosols in the Climate System

3. Particle Size Distributions: Theory and Application to Aerosols, Clouds, and Soils

by Robert Stewart

open source, accepting contributions:

Introduction to Physical Oceanography