Jump to ContentJump to Main Navigation
The Hockey Stick and the Climate WarsDispatches from the Front Lines$
Users without a subscription are not able to see the full content.

Michael Mann

Print publication date: 2013

Print ISBN-13: 9780231152556

Published to Columbia Scholarship Online: November 2015

DOI: 10.7312/columbia/9780231152556.001.0001

Show Summary Details
Page of

PRINTED FROM COLUMBIA SCHOLARSHIP ONLINE (www.columbia.universitypressscholarship.com). (c) Copyright University of Minnesota Press, 2020. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CUPSO for personal use.date: 03 June 2020

Signals in the Noise

Signals in the Noise

Chapter:
(p.26) Chapter 3 Signals in the Noise
Source:
The Hockey Stick and the Climate Wars
Author(s):

Michael E. Mann

Publisher:
Columbia University Press
DOI:10.7312/columbia/9780231152556.003.0003

This chapter focuses on the search for more evidence to support the view that there was a detectable human influence on global climate. In the early 1990s, after carefully weighing all the evidence, scientists could honestly disagree with each other over whether there was a detectable human influence on climate. They could legitimately be skeptical about whether the human climate change signal had yet emerged. The evidence was not as extensive as it would soon become, and the theoretical models that scientists then employed to study Earth's climate system were still rather primitive. For these reasons, scientists were holding out for more evidence, while other scientists, such as NASA's James Hansen and Stanford University's Stephen Schneider, were convinced by the evidence already in hand that human-caused climate change was indeed now upon us. In this chapter, the author considers natural climate variability as a plausible competing mechanism for explaining observed climate trends and how he and his collaborators in the hockey stick study discovered the “Atlantic multidecadal oscillation” (AMO), along with the purported existence of a medieval warm period.

Keywords:   climate change, James Hansen, Stephen Schneider, natural climate variability, Atlantic multidecadal oscillation, medieval warm period, human-caused climate change

Columbia Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.

Please, subscribe or login to access full text content.

If you think you should have access to this title, please contact your librarian.

To troubleshoot, please check our FAQs, and if you can't find the answer there, please contact us .