The transformation of the Earth System through human activity, and the further transformations required to ensure future sustainability, pose huge governance challenges (Foley et al., 2005;Reid et al., 2010). These challenges can complicate and overshadow efforts to achieve accountability, and may even require their wholesale reconceptualisation (Lövbrand, Stripple and Wiman, 2009;Biermann et al., 2012). Understanding the emerging pressures and forms of accountability under rapid global change is therefore a crucial task for earth systems governance research (Papadopoulos, 2007;Biermann and Gupta, 2011).While the scale of many current governance challenges is new, responses can build on decades of research into accountability (Biermann and Gupta, 2011). In doing so, they inherit a number of perspectives and open debates. Of particular relevance are discussions about the value and function of accountability, whether as an independent normative property of governance systems or as an interacting element with benefits and trade-offs for others (