See below for more information on Reference Works and Encyclopedias in the Earth and Environmental Sciences.  Titles featured:

Treatise on Geophysics - Encyclopedia of Quaternary Science
Encyclopedia of Geology - Encyclopedia of Caves - Treatise on Geochemistry
Encyclopedia of Atmospheric Sciences - Encyclopedia of Ocean Sciences
Encyclopedia of Biodiversity - Seas at the Millennium - Encyclopedia of Volcanoes
Encyclopedia of Earth System Science

 TREATISE ON GEOPHYSICS
Eleven-Volume Set
G. Schubert
Expected publication date 2007

 ENCYCLOPEDIA OF GEOLOGY
Five-Volume Set
Richard C. Selley, Robin Cooks, Ian R. Plimer
December 2004

 Online Access

 Reviews

 TREATISE ON GEOCHEMISTRY
Ten-Volume Set
Heinrich D. Holland and Karl K. Turekian
December 2003

 Online Access

 Reviews

 ENCYCLOPEDIA OF OCEAN SCIENCES
Six-Volume Set
John Steele, Steve Thorpe, Karl Turekian
2001

 Online Access

 Reviews

 ENCYLOPEDIA OF BIODIVERSITY
Five-Volume Set
Simon Levin
September 2000

 Online Access

 Reviews

 ENCYCLOPEDIA OF EARTH SYSTEM SCIENCE
Four-Volume Set
William Nierenberg et al
1991

 Reviews

 ENCYCLOPEDIA QUATERNARY SCIENCE
Four-Volume Set
S. A. Elias
Expected publication date 2006

 ENCYCLOPEDIA OF CAVES
David Culver and William White
November 2004

 Reviews

 ENCYCLOPEDIA OF ATMOSPHERIC SCIENCES
Six-Volume Set
James R. Holton†, John Pyle, Judith A. Curry
December 2002

 Online Access

 Reviews

 SEAS AT THE MILLENNIUM
Three-Volume Set
C. Sheppard
2000

 Reviews

 ENCYCLOPEDIA OF VOLCANOES
Haraldur Sigurdsson et al.
October 1999

 Reviews