Western Indian Ocean marine and terrestrial records of climate variability: a review and new concepts on land-ocean interactions since AD 1660

We examine the relationship between three tropical and two subtropical western Indian Ocean coral oxygen isotope time series to surface air temperatures (SAT) and rainfall over India, tropical East Africa and southeast Africa. We review established relationships, provide new concepts with regard to distinct rainfall seasons, and mean annual temperatures. Tropical corals are coherent with SAT over western India and East Africa at interannual and multidecadal periodicities. The subtropical corals correlate with Southeast African SAT at periodicities of 16–30 years. The relationship between the coral records and land rainfall is more complex. Running correlations suggest varying strength of interannual teleconnections between the tropical coral oxygen isotope records and rainfall over equatorial East Africa. The relationship with rainfall over India changed in the 1970s. The subtropical oxygen isotope records are coherent with South African rainfall at interdecadal periodicities. Paleoclimatological reconstructions of land rainfall and SAT reveal that the inferred relationships generally hold during the last 350 years. Thus, the Indian Ocean corals prove invaluable for investigating land–ocean interactions during past centuries

Lessons for Jurisdictional Approaches From Municipal-Level Initiatives to Halt Deforestation in the Brazilian Amazon

Jurisdictional approaches have become popular in international forums as promising strategies to reduce greenhouse gas emissions caused by deforestation and to guarantee sustainable commodity supply. Yet, despite their growing popularity, up to now, there is little consensus on how such approaches should move forward in specific jurisdictions. In this paper we examine two contrasting municipal-level case studies in the eastern Amazonian state of Pará where jurisdiction-wide efforts are underway to reduce deforestation. By developing detailed forest governance intervention timelines since 2005, conducting semi-structured interviews with key informants, analyzing municipal deforestation trends, plus extensive examination of project reports, governmental documents and other secondary sources, this paper performs two main analyses. First, it characterizes the processes in each municipality by linking context and forest governance intervention timelines to deforestation trends. Second it provides a systematic comparison of processes based on (1) the role of the government, (2) multi-stakeholder participation and inclusiveness, (3) adaptive management, (4) horizontal and vertical coordination, and (5) alignment of public and private (supply-chain) initiatives. In so doing, this article answers some of the imperative questions on how to implement and improve jurisdictional approaches aimed at halting deforestation in the tropics