• Tropical deforestation drivers and associated carbon emission factors derived from remote sensing data

    De Sy V, Herold M, Achard F et al.
    Environmental Research Letters
    2019

    This study quantified post-deforestation land use across the tropics for the period 1990–2000. This dataset was then combined with a pan-tropical AGB map at 30 m resolution to refine emission factor from forest conversion by matching deforestation areas with their carbon stock before and after clearing and to assess spatial dynamics by follow-up land use.

  • Impacts of intensifying or expanding cereal cropping in sub‐Saharan Africa on greenhouse gas emissions and food security

    van Loon MP, Hijbeek R, ten Berge HM, De Sy V et al.
    Global change biology
    2019

    This study assesses the impact of achieving cereal self‐sufficiency by the year 2050 for 10 sub-Saharan countries on GHG emissions related to different scenarios of increasing cereal production, ranging from intensifying production to agricultural area expansion.

  • Estimating aboveground net biomass change for tropical and subtropical forests: refinement of IPCC default rates using forest plot data.

    Requena Suarez D, Rozendaal DM, De Sy V et al.
    Global change biology
    2019

    Countries with limited forest monitoring capabilities in the tropics and subtropics rely on IPCC 2006 default aboveground net biomass change (∆AGB) rates. As part of the 2019 Refinement to these guidelines, we provide a rigorous and traceable updates of the IPCC 2006 default rates in tropical and subtropical ecological zones. This study is an important step towards quantifying the role of tropical and subtropical forests as carbon sinks with higher accuracy and our new rates can be used for large‐scale GHG accounting by governmental bodies, nongovernmental organizations and in scientific research.

  • Land Restoration in Latin America and the Caribbean: An overview of recent, ongoing and planned restoration initiatives and their potential for climate change mitigation

    Romijn E, Coppus R, De Sy et al.
    Forests
    2019

    We present an overview of the location, goals and activities, and an estimated climate change mitigation potential of 154 recent, ongoing and planned restoration projects in Latin America and the Carribean.

  • Global data and tools for local forest cover loss and REDD+ performance assessment: Accuracy, uncertainty, complementarity and impact

    Bos A, De Sy V, Duchelle A et al.
    International Journal of Applied Earth Observation and Geoinformation
    2019

    Assessing the performance of REDD+ efforts requires data on forest cover change. Innovations in remote sensing and forest monitoring provide ever-increasing levels of coverage, spatial and temporal detail, and accuracy. In this paper we analyse (1) differences in accuracy between datasets of forest cover change; (2) if and how combinations of datasets can increase accuracy; and we demonstrate (3) the effect of (not) doing accuracy assessments for REDD+ performance measurements.

  • Independent data for transparent monitoring of greenhouse gas emissions from the land use sector–What do stakeholders think and need?

    Romijn E, De Sy V, Herold M et al.
    Environmental Science & Policy
    2018

    Greenhouse gas emissions reduction from the land use sector requires that accurate, consistent and comparable datasets are available for transparent reference and progress monitoring. Through an online survey, we investigated stakeholders’ data needs for estimating forest area and change, forest biomass and emission factors, and AFOLU GHG emissions. Our results show that current open and freely available datasets and portals are only able to fulfil stakeholder needs to a certain degree. We also identify key elements for increasing overall transparency of data sources, definitions and methodologies.

  • Comparing methods for assessing the effectiveness of subnational REDD+ initiatives

    Bos AB, Duchelle AE, Angelsen A et al.
    Environmental Research Letters
    2017

    Subnational REDD+ initiatives present an opportunity to compare different approaches to quantifying impacts on carbon emissions. This study (1) develops a Before-After-Control-Intervention (BACI) method to assess the effectiveness of 23 subnational REDD+ initiatives in Brazil, Peru, Cameroon, Tanzania, Indonesia and Vietnam; (2) compares the results at different scales; and (3) compares BACI with the simpler Before-After (BA) results.

  • Remote sensing of land use and carbon losses following tropical deforestation

    De Sy V
    PhD dissertation, Wageningen University
    2016

    The need for data on drivers and activities causing forest carbon change have been highlighted as central components in REDD+ readiness efforts. Assessment of direct and indirect drivers on the national level is often lacking or incomplete. This thesis explores the role of remote sensing for monitoring tropical forests for REDD+ in general, and for assessing land use and related carbon emissions linked to drivers of tropical deforestation in particular.

  • Linking community-based and national REDD+ monitoring: A review of the potential

    Pratihast AK, Herold, M, De Sy V et al.
    Carbon Management
    2013

    REDD+ countries are required to establish a national monitoring system. Community-based monitoring (CBM) can be useful for tracking locally driven forest change activities and their impacts. In this paper, we review some of the key issues regarding CBM and options to link it to national forest monitoring systems.

  • An assessment of deforestation and forest degradation drivers in developing countries

    Hosonuma N, Herold M, De Sy V et al.
    Environmental Research Letters
    2012

    Countries are encouraged to identify drivers of deforestation and forest degradation (DD) in the development of national strategies and action plans for REDD+. In this letter we provide an assessment of proximate drivers of DD by synthesizing empirical data reported by countries as part of their REDD+ readiness activities and scientific literature.

  • Synergies of multiple remote sensing data sources for REDD+ monitoring

    De Sy V, Herold M, Achard F et al.
    Current Opinion in Environmental Sustainability
    2012

    Remote sensing technologies can provide objective, practical and cost-effective solutions for developing and maintaining REDD+ monitoring systems. This paper reviews the potential and status of available remote sensing data sources with a focus on synergies among various approaches and evolving technologies.