This
section discusses how a focus on thresholds and turning points can meet
information needs for policy making. The traditional view within
science has often been that scientists should deliver their best
possible projections to the decision process as detached specialist
(c.f. Ravetz, 2006). This is reflected in the more typical process of
adaptation planning, which begins with the generation of climate
projections, then an analysis of their impacts and finally the design
and assessment of options to adapt to those impacts. Many researchers
consider this mode of science-policy interaction outdated. Recent
studies have suggested that the process should be inverted and start
from the adaptation problem in its decision context in order to satisfy
information needs of decision-makers in the face of
uncertainty (Cash et al., 2006; Kwadijk et al., 2010; Brown, 2011;
Reeder and Ranger, 2011; Hanger et al., 2013).
Tailoring
scientific information to the problems to which it will be applied
implies an exchange between information providers and users with the
aim to support governance decisions. For information to be useful, it
must have three broad characteristics (Cash et al., 2003): salience,
credibility and legitimacy. Salience means that the information is
context-specific and relevant for the decision at hand. It entails
ensuring that information provided is needed by those taking actions on
it, and in a form that is understandable and can be acted on a timely
manner. Credibility means that users perceive the information to be
accurate, dependable and of high quality, while legitimacy means that
the producers of information are seen to be politically unbiased and
that they keep the users‘ interests in mind. Decision support
for sustainability under climate change has the further difficulty of
communicating deep uncertainty (Hallegatte et al., 2012). This arises
not only from uncertainty in scientific models or incomplete
understanding of particular natural or societal processes, but also
from the presence of multiple valid, and sometimes conflicting, ways of
framing a problem.
The assessment of thresholds
and adaptation turning points can produce information that is
legitimate, salient and credible for decision-making. Salience is
derived from focussing on actor concerns and in particular what actors
define as unacceptable change. This allows actors to reframe and
understand climate change in terms of pre-existing interests or policy
competences (c.f. Termeer et al., 2011). Salience is also supported by
the work on adaptation pathways, which shows that the information is
actionable and appropriate (even) in the face of deep uncertainty.
Legitimacy stems from the central position that the concerns and values
of actors take in the assessment. In addition legitimacy results from
facilitating the discourse around potential changes in objectives and
responsibilities (c.f. Adger et al., 2013).
Adaptation
governance has an important role to play in the definition and
renegotiation of rules and policy objectives untenable under climate
change. Credibility results from combining bottom-up elicited
social-political preferences with top-down impact projections to assess
when and how likely it is that unacceptable conditions occur. It is
also aided by the intensified efforts of researchers and policy-makers
to coproduce knowledge that includes values and criteria from both
communities (c.f. Cash et al., 2006; Hanger et al., 2013). Making this
link between actor values, policy objectives and projections of global
change is one of the most challenging aspects of the assessment (c.f.
Offermans et al., 2011) as multiple links often have to be considered
and transient scenario runs at an appropriate scale are scarce. Thus
there may be a trade-off between the complexity of the social-political
concern (salience) and the accuracy and scientific rigor that can be
achieved (credibility) as presently the impact of climate change on
more complex social-ecological systems and policy objectives is poorly
understood. Here the study of thresholds and adaptation turning points
can help set the research agenda.
Conclusions
Climate
change requires long-term planning in the face of uncertainty where
conservation may no longer be the sustainable option. Thus, decision
making has to shift its attention to adaptation and strengthening
resilience in social-ecological systems.
Climate
change becomes particularly relevant to decision makers in the specific
situation where climate change induces policy failure and alternative
strategies have to be considered. We call this situation an
‘adaptation turning point’.
The
assessment of adaptation turning points provides an important entry
point for a dialogue between science and policy about why people care,
how much stress a system can absorb before an unacceptable situation is
reached, when this is likely to happen, and what can be done. After
projecting an adaptation turning point, actors need to search for new
options.
The identification of turning points
helps in mapping practical adaptation pathways that pull together
information on available options and path-dependencies. These encourage
taking the necessary short-term actions to sustain the current system,
whilst keeping options open for planning longer-term activities and
more fundamental system change that may be required depending on how
time unfolds.
It is the combination of
scientific underpinning and practical application that makes an
assessment of adaptation turning points and adaptation pathways
attractive for furthering adaptation.