Psychology’s Contributions to Understanding and
Addressing Global Climate Change
Janet K. Swim Pennsylvania State University
Paul C. Stern National Research Council
Thomas J. Doherty Lewis & Clark Graduate School of Education and
Counseling
Susan Clayton College of Wooster
Joseph P. Reser Griffith University
Elke U. Weber Columbia University
Robert Gifford University of Victoria
George S. Howard University of Notre Dame
Global climate change poses one of the greatest challenges
facing humanity in this century. This article, which introduces
the American Psychologist special issue on global
climate change, follows from the report of the American
Psychological Association Task Force on the Interface
Between Psychology and Global Climate Change. In this
article, we place psychological dimensions of climate
change within the broader context of human dimensions of
climate change by addressing (a) human causes of, consequences
of, and responses (adaptation and mitigation) to
climate change and (b) the links between these aspects of
climate change and cognitive, affective, motivational, interpersonal,
and organizational responses and processes.
Characteristics of psychology that cross content domains
and that make the field well suited for providing an understanding
of climate change and addressing its challenges
are highlighted. We also consider ethical imperatives for
psychologists’ involvement and provide suggestions for
ways to increase psychologists’ contribution to the science
of climate change.
Keywords: climate change, interdisciplinary research, human–
environment relations, sustainability, psychological
dimensions Global climate change poses one of the greatest
challenges facing humanity in this century.
Earth’s climate has changed in many ways over
geological time, but for the first time, over the past century,
human activity has become a significant cause of climate
change. By burning fossil fuels, cutting and burning forests,
and engaging in other environment-impacting activities,
humans have changed the heat balance of Earth sufficiently
that the global average temperature has moved
outside the range that has characterized the 10,000 years of
recorded human history (Intergovernmental Panel on Climate
Change, 2007a). This climate change “poses significant
risks for—and in many cases is already affecting—a
broad range of human and natural systems” (National Research
Council, 2010a, p. 2). Because of physical time lags
in the climate system, the impacts and human consequences
of climate change will continue for many decades
and, in some cases, many centuries (Solomon, Plattner,
Knutti, & Friedlingstein, 2009). Moreover, climate change
will take place in the context of the other sweeping social,
technological, and ecological transitions of the 21st century
(e.g., increases in population, urbanization, and disparities
in wealth; Stokols, Misra, Runnerstrom & Hipp, 2009),
making confident anticipation of its effects especially problematic.
The current state of scientific knowledge on the
causes and consequences of climate change is summarized
in two recent major studies (Karl, Melillo, & Peterson,
2009; National Research Council, 2010a).
Climate change is sometimes equated with global
warming, but it involves much more than temperature
change. The human activities that cause temperature
change set in motion a series of associated phenomena: sea
level rise, loss of polar sea ice, melting of continental
glaciers, changes in precipitation patterns, progressive
shifting in the habitats of species and the boundaries of
ecosystems, acidification of the oceans, and more (Intergovernmental
Panel on Climate Change, 2007a, 2007b;
National Research Council, 2010b). These changes and
impacts in turn create increasing risks to the planet’s life
Janet K. Swim, Department of Psychology, Pennsylvania State University;
Paul C. Stern, Committee on the Human Dimensions of Global
Change, Division of Behavioral and Social Sciences and Education,
National Research Council, Washington, DC; Thomas J. Doherty, Department
of Counseling Psychology, Lewis & Clark Graduate School of
Education and Counseling; Susan Clayton, Department of Psychology,
College of Wooster; Joseph P. Reser, School of Psychology, Griffith
University, Gold Coast Campus, Queensland, Australia; Elke U. Weber,
Department of Psychology and Center for Research on Environmental
Decisions, Graduate School of Business, Columbia University; Robert
Gifford, Department of Psychology, University of Victoria, Victoria,
British Columbia, Canada; George S. Howard, Department of Psychology,
University of Notre Dame.
Correspondence concerning this article should be addressed to Janet
K. Swim, Department of Psychology, Pennsylvania State University, 515
Moore Building, University Park, PA 16802-3106. E-mail: jks4@psu.edu
May–June 2011 ● American Psychologist 241
© 2011 American Psychological Association 0003-066X/11/$12.00
Vol. 66, No. 4, 241–250 DOI: 10.1037/a0023220
support systems and to a myriad of species, including
humankind.
The natural sciences have long been engaged in studying
environmental systems, including the physical and
chemical processes that change Earth’s heat balance, the
ways in which these processes affect other parts of the
global climate system, and the consequences of all these
changes for physical and biological processes on land and
in the waters. However, a second science of climate change
has been developing for over a quarter of a century: the
science of the “human dimensions” of climate change
(Chen, Boulding, & Schneider 1983; National Research
Council, 1992; Stern, 1993). This field of science seeks to
understand human activities that affect climate change,
consequences of climate change that directly and indirectly
affect people, human responses to anticipated and experienced
climate change, and ways to help people respond
effectively. Psychological dimensions are integral to human
dimensions of climate change and have been a part of
broader efforts by psychologists, perhaps most noticeably
environmental psychologists, over the course of several
decades to understand and address a range of environmental
changes and problems (e.g., Gardner & Stern, 2002;
Koger & Winter, 2010; Nickerson, 2003; Schmuck &
Schultz, 2002; Swim, Markowitz, & Bloodhart, in press). A
summary of relevant psychological research was provided
in the report of the American Psychological Association
Task Force on the Interface Between Psychology and
Global Climate Change (2009). The articles in this special
issue follow from this task force report. The present article
provides an overview of these articles, a model that integrates
this literature with the broader literature on human
dimensions of climate change, and some general suggestions
for psychologists who wish to contribute in this area.
A simple conceptual model distinguishes climate systems
(which are part of environmental systems) from human
systems and delineates the connections among them
(see Figure 1). As noted on the left-hand side of the figure,
people affect climate through activities (e.g., burning fossil
fuels, clearing forests) that directly alter environmental
conditions that change the climate. These activities, which
have been called proximate human causes of climate
change, are a result of a full range of cultural, economic,
political, and social conditions and processes, depicted as
“human systems” in the figure, and of psychological considerations
noted in the middle of the figure, which include
human understanding of climate change, affective responses
to climate change, and psychological motivations.
Psychological considerations are often and appropriately
treated as part of human systems. We separate them here to
highlight them for a psychological audience. As depicted
on the right-hand side of the figure, climate systems affect
people through events that directly alter essential aspects of
the environment that support humans and other living
things, for example, by changing the frequency of storms
and droughts, the availability of water, the viability of food
crops, and the incidence of disease. Human consequences
are also both psychological (e.g., distress) and social (e.g.,
intergroup relations) and are influenced by intra-individual
cognitive, affective, and motivational processes as well as
human systems at a larger scale. Responses to anticipated
and experienced climate change are mitigation and adaptation,
as depicted in the bottom left and right corners of the
figure. Efforts to mitigate or limit climate change are aimed
at directly or indirectly altering the proximate causes of
climate change. Adapting to climate change includes addressing
the psychological and social impacts of both the
threat and the unfolding consequences of climate change.
Cognitive, affective, and motivational processes affect mitigation
and adaptation via the influence of psychological
processes on human contributions, systems, and consequences.
The direct and indirect impacts of these psychological
processes on many of the elements shown in the
figure illustrate that human dimensions of climate change
are inherently psychological and social and that psychology
can offer knowledge and concepts that can help explain the
human understanding, causes, and consequences of climate
change as well as inform responses to it and help make
them more effective.
What Does Psychology Have to
Offer?
Over the past three decades, a number of research agendas
have been developed for the human dimensions of global
change, including climate change (e.g., Chen et al., 1983;
Kates, Ausubel, & Berberian, 1985; National Research
Figure 1
Human and Psychological Dimensions of Climate
Change
Note. Adapted from Figure 4-1 (p. 106) in Global Environmental Change:
Understanding the Human Dimensions (by National Research Council, 1992,
Washington, DC: National Academy of Sciences. Copyright 1992 by National
Academy of Sciences.
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