Waldner P.,Swiss Federal Institute of forest |
Marchetto A.,CNR Institute of Ecosystem Study |
Thimonier A.,Swiss Federal Institute of forest |
Schmitt M.,Swiss Federal Institute of forest |
And 33 more authors.
Atmospheric Environment | Year: 2014
Atmospheric deposition to forests has been monitored within the International Cooperative Programme on Assessment and Monitoring of Air Pollution Effects on Forests (ICP Forests) with sampling and analyses of bulk precipitation and throughfall at several hundred forested plots for more than 15 years. The current deposition of inorganic nitrogen (nitrate and ammonium) and sulphate is highest in central Europe as well as in some southern regions. We compared linear regression and Mann-Kendall trend analysis techniques often used to detect temporal trends in atmospheric deposition. The choice of method influenced the number of significant trends. Detection of trends was more powerful using monthly data compared to annual data. The slope of a trend needed to exceed a certain minimum in order to be detected despite the short-term variability of deposition. This variability could to a large extent be explained by meteorological processes, and the minimum slope of detectable trends was thus similar across sites and many ions. The overall decreasing trends for inorganic nitrogen and sulphate in the decade to 2010 were about 2% and 6%, respectively. Time series of about 10 and 6 years were required to detect significant trends in inorganic nitrogen and sulphate on a single plot. The strongest decreasing trends were observed in western central Europe in regions with relatively high deposition fluxes, whereas stable or slightly increasing deposition during the last 5 years was found east of the Alpine region as well as in northern Europe. Past reductions in anthropogenic emissions of both acidifying and eutrophying compounds can be confirmed due to the availability of long-term data series but further reductions are required to reduce deposition to European forests to levels below which significant harmful effects do not occur according to present knowledge. © 2014 The Authors.
Fischer R.,Thunen Institute for International Forestry and Forest Economics |
Hargita Y.,Thunen Institute for International Forestry and Forest Economics |
Gunter S.,Thunen Institute for International Forestry and Forest Economics
Forest Policy and Economics | Year: 2016
The REDD program ("Reducing Emissions from Deforestation and Degradation") was launched in 2007. Two years later it was modified into REDD + Since then, numerous sub-national initiatives have implemented REDD + or REDD +-like mechanisms. Now, shortly before the COP (United Nations Framework Convention on Climate Change, Conference of the Parties) in Paris 2015 it is timely and necessary to analyze insights and to draw upon lessons learned. This study reviews multi-national REDD+ studies by applying qualitative content analysis using the UNFCCC Warsaw Framework for categorization. Experiences with the implementation of core REDD+ topics like institutional responsibility and results-based financing are mostly not encouraging. Monitoring systems require further development, and guidance for jurisdictional approaches is lacking. Experiences with reference levels, permanence and leakage have hardly been reported. More general topics like stakeholder participation, tenure clarification and biodiversity co-benefits are in turn more advanced. But these are not necessarily effects of REDD+ components in the projects. The projects obviously offer a platform to advance classical development issues. We conclude that financial signals from the upcoming COP in Paris are essential to encourage further development and implementation. This supports conclusions in accordance with the UNFCCC session in Bonn 2015 stating that methodologies are now complete and implementation must begin. Additional conclusions are drawn for specific topics of the Warsaw Framework. Authors claim that REDD+ should stimulate and support transformational change. © 2015.