We'll be looking at a broad range of electronic resources. To simplify a bit, here are the basic URLs to get you to the starting places. Links can be found on various Science Library pages:

Let's begin with something recent, accessible, totally apposite:

From Science Volume 299, Number 5604, Issue of 10 Jan 2003, the following articles on/near 'climate change', each a potential launching pad to other materials:

Anthropogenic CO2 Uptake by the Ocean Based on the Global Chlorofluorocarbon Data Set (Ben I. McNeil et al.) (561 "similar articles" in Science Online)

Whither Arctic Climate? (Drew Shindell) (link to 571 "similar articles" in Science Online)

Tropical Pacific a Key to Deglaciation (Richard A. Kerr) (link to 148 "similar articles" in Science Online)

From Anchovies to Sardines and Back: Multidecadal Change in the Pacific Ocean (Francisco P. Chavez et al.) (link to 66 "similar articles" in Science Online)

In PNAS, a search for "climate change" in title/abstract gets 49 hits; in Web of Science, 58 show up in PNAS. Here's one of them:
Climate forcings in the Industrial era
Hansen JE, Sato M, Lacis A, Ruedy R, Tegen I, Matthews E
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
95 (22): 12753-12758 OCT 27 1998

What can we DO with this? Obviously we can mine its bibliography, but we might want to ask what others have said about the article and its authors, and we can ask who has CITED the article in subsequent literature on climate change (Web of Science gives us 63 citers...).

One other inspiration is to see what Google says in response to "hansen sato climate" --and we get more than 1900 hits. Among the new paths that open:

Important References and Links from Friends of Science ("Welcome to the Friends of Science website, a critical scientific assessment that challenges the premises of the Kyoto Protocol, and presents causes for climate change that are more plausible than carbon dioxide.)

Goddard Space Flight Center press release (Jan 2002)

Reconciling Observations of Global Temperature Change (2000) Commission on Geosciences, Environment and Resources (National Academies Press book, full text online)

Citizens for a Sound Economy story (March 1999) "NASA Scientist Declares Climate Prediction Impossible: Is it Time for a New Climate Change Policy?"

Hansen Global Temperature Indices (a dataset and viewer, from IRI/LDEO Climate Data Library at Columbia)

Editorial Commentary (October 2000) "We Think the Scientist Doth Protest Too Much", from Center for the Study of Carbon Dioxide and Global Change ("Hansen's own assessment of the implications of his paper, however, is perhaps the most egregious misinterpretation of them all...")

Scout Report search

A search in Science's full text for 'hansen and sato' produces 30 hits, among them
Advanced Technology Paths to Global Climate Stability: Energy for a Greenhouse Planet (Martin I. Hoffert et al.) (Science Volume 298, Number 5595, Issue of 1 Nov 2002, pp. 981-987)
Science also has a Collection on Atmospheric Science that gives good access to a sector of the literature

Annual Reviews: a search of the whole suite for "climate change" in title/abstract produces 33 hits. Consider these:

Daniel M Bodansky The Emerging Climate Change Regime Annu. Rev. Energy Environ. 1995, Vol. 20: 425-461 (not available online, but we have it in print)

Daniel A. Lashof, Benjamin J. DeAngelo, Scott R. Saleska, and John Harte TERRESTRIAL ECOSYSTEM FEEDBACKS TO GLOBAL CLIMATE CHANGE Annu. Rev. Energy Environ. 1997, Vol. 22: 75-118

CONVERGING PATHS LEADING TO THE ROLE OF THE OCEANS IN CLIMATE CHANGE (Wallace S. Broecker) Annu. Rev. Energy Environ. 2000. 25:1-19

Dave mentioned to me that he'd told you about a recent article by Walter Munk: Twentieth century sea level: An enigma (Walter Munk) Proc. Natl. Acad. Sci. USA, Vol. 99, Issue 10, 6550-6555, May 14, 2002

How can we find/construct some context for this item? Who IS this Walter Munk? I started my quest with a Google search (why?) and found some useful bits:

Walter Munk biography

OCEANOGRAPHY: THE MAKING OF A SCIENCE People, Institutions and Discovery Transcript of the Videotape-Recorded Interview with WALTER MUNK

interview and videos of Walter Munk

So I thought: what does GeoRef tell us about his oeuvre? I find 22 items with "Munk, Walter" as author... one of them an article from 1952, co-authored with Roger Revelle.

Something old, something new... a book, an article... Think about BOOKS for a bit. If we do an Annie search for 'anthropogenic' as a KEYWORD, we get 29 hits; 'anthropogenic AND climate' limits it to 11.

JSTOR: if we search for 'anthropogenic' in full text, we get "more than 200..."; if we do 'anthropogenic AND climate', still over 200... if we do 'anthropogenic AND "climate change" ' we get 168... one of which is

A Common-Sense Climate Index: Is Climate Changing Noticeably? (James Hansen; Makiko Sato; Jay Glascoe; Reto Ruedy)
Proceedings of the National Academy of Sciences of the United States of America, Vol. 95, No. 8. (Apr. 14, 1998), pp. 4113-4120 --and this one turns out in Web of Science to have been cited by 9 subsequent authors.