SciDev.Net

This report, prepared for the UN Economic Commission for Africa, reviews the status and prospects for remote sensing in Africa.

The authors argue that a real and immediate need exists for real-time remote sensing data to improve early warning, vulnerability assessment, mitigation, response and relief of disasters. This means, they say, supporting African countries to acquire data — including launching their own satellites, as well as improving bandwidth infrastructure and building capacity for analysing and processing geoinformation.

The authors highlight the continent's limited connectivity as a particularly challenging hurdle to overcome, as well as a lack of training and expertise in remote sensing. They briefly outline international donors' efforts to improve the situation and suggest improving collaboration and networking.

This article describes how a network of sensors, linked by software and the Internet, can provide an automatic satellite-based surveillance system for disasters such as volcanoes, wildfires and flooding.

The system, or 'Sensorweb', uses data from low resolution, high frequency sensors to trigger imagery from high resolution instruments. The low-resolution data is collected regularly (twice a day or more) from instruments such as NASA's Moderate Resolution Imaging Spectroradiometer (MODIS).

Anomalies, such as hotspots in the case of fires and volcanoes or surface water for floods, are automatically detected. The SensorWeb then sends a request to a higher resolution satellite such as Hyperion, which is very sensitive in the infrared spectrum, to request data over the area of interest. These data can then provide disaster managers with early warnings of adverse events.

This feature article, written by members of the UN Operational Satellite Applications (UNOSAT) programme, outlines how satellite technology can improve emergency relief after a natural disaster.

UNOSAT uses satellite data to produce maps and damage reports for nongovernment organisations, intergovernmental agencies and disaster managers in emergency situations. The authors describe how the process works — from receiving a relief agency's phone call to collecting and analysing relevant satellite data.

They argue that satellite data, when combined with ancillary data such as road maps or population distribution, can help aid workers navigate affected areas and provide estimates of the number of people likely to be affected by, for example, floods or landslides.

The authors describe the range of satellite sensors used by UNOSAT, explaining the advantages of different types of data depending on the disaster. For example, radar imagery, which is unaffected by cloud, is particularly useful to monitor flooding, whereas high resolution optical data is better for earthquake damage assessment.

Written by former director of India's National Remote Sensing Agency, D. P. Rao, this article reviews the role of space technology in disaster mitigation.

Rao offers examples of how remote sensing can feed into prevention, preparedness and relief strategies for a number of disasters. He identifies the areas where these applications are operational, and those that need more research and development.

For drought, cyclones, floods, fires, earthquakes and other disasters in India, Rao outlines the status of relevant remote sensing projects. He outlines the extent of the problem posed by each disaster, and how Indian government and nongovernment organisations use remote sensing to improve risk assessment and early warning.

This report, written by solid-Earth scientists at NASA's Jet Propulsion Laboratory, sets out the requirements for delivering high-accuracy, high-resolution surface deformation data for earthquake studies.

The authors build on recommendations made by NASA's Solid Earth Science Working Group. They propose a constellation of satellites for interferometric synthetic aperture radar (InSAR) — a technique based on combining two or more radar images in a way that can measure ground motion on a centimetre scale.

A constellation of InSAR satellites could provide earthquake prediction data, suggest the authors. The GESS report defines a 20-year roadmap for earthquake forecasting and outlines the measurement requirements, as defined by scientists and disaster managers.

This article, written by Chris Funk of the US GS, outlines how the Famine Early Warning Systems Network (FEWS NET) uses satellite data and statistical forecasts to provide early warnings of potential droughts in sub-Saharan Africa.

Funk outlines the role of satellite data in FEWS NET at all stages of the crop-growing season — from scenario building before the season to calculating the water balance during it and assessing yields at the end. Focusing on food security outlooks for East Africa in late 2008, Funk describes how data from NASA's Aqua and QuikSCAT satellites can be used to track moisture and wind conditions over the Indian Ocean and Africa, and how these help anticipate hydrologic conditions in the future to predict shortfalls.

Funk emphasises the need to combine such data with socio-economic analyses of, for example, crop prices, grain stores, political conditions and agricultural inputs. This will help maximise the accuracy and effectiveness of early warnings of drought and food shortages.

This report, prepared by the Committee on Earth Observation Satellites (CEOS), presents the main capabilities of satellite systems and their applications to detect, monitor and adapt to climate change, alongside plans for future relevant satellite missions.

The report is divided into three parts. The first discusses the Earth's changing climate, emphasising the role of satellite imagery in monitoring this. The second presents a number of case studies to illustrate how earth observing satellites provide data to improve our understanding of climate change, including charting sea-level rise to better cope with flooding.

The final part summarises satellite capabilities with a description of the different satellite missions and instruments as well as their applications, such as to improve weather forecasting or provide damage assessment associated with natural disasters.

This review article describes how remote sensing data can and are being used to map and monitor disasters such as earthquakes, volcanic eruptions, landslides, flooding and wildfire.

The authors summarise the main satellites and sensors used in disaster monitoring and their characteristics. They also discuss in more detail the data and techniques used for individual types of disaster, outlining the advantages and drawbacks to each. In particular, they describe the methods most commonly used to analyse optical, thermal, radar and LiDAR (Light Detection and Ranging) data.

The authors summarise ongoing initiatives using remote sensing data for disaster management, including Sentinel Asia and the International Charter on Space and Major Disasters. Potentially useful emerging systems such as the Disaster Monitoring Constellation are briefly discussed.

This report from GeneWatch UK describes the use of genetically modified (GM) crops as agrofuels and makes policy recommendations on their use.

Civil society groups have raised concerns over the sustainability of using food supplies to produce biofuel. Industry and government have responded by investing in genetically modified 'second generation' biofuels to try and increase energy output from a broader range of plant sources.

The author says that assessments of GM biofuels must consider their impact on biodiversity, food supply and land use, how much they can realistically reduce carbon emissions and their technical feasibility.

GeneWatch UK recommends an independent appraisal for second-generation GM agrofuels. It suggests that gaps in research and regulation must be addressed, particularly those regarding environmental concerns such as factory waste streams containing GM organisms.

This report from the UN Development Programme (UNDP) and UN Environment Programme (UNEP) offers advice to policymakers on present evidence to make the case for environmental investment.

Environmental sustainability is often seen as a luxury that governments cannot afford. Environmental managers often find selling their sector to macroeconomic decision-makers difficult.

But a healthy environment is vital to pro-poor economic growth, and economic evidence can encourage policymakers to buy in to policies that promote sustainable use and management of the environment.

The data requirements for making the economic case for environmental investment are summarised and advice is provided both for accessing relevant information, and presenting it as a convincing argument to treasuries and finance ministries.

This factsheet from The Center for International Forestry Research (CIFOR) aims to answer common questions about the role of reducing forest emissions in tackling climate change.

This includes explaining why reducing emissions from deforestation and forest degradation (REDD) is important and identifying the four key challenges facing REDD projects — measuring carbon, making payments, accountability and funding. The authors summarise ongoing global initiatives to implement REDD, including the UN REDD Programme Fund and the Forest Carbon Partnership Facility.

A glossary of terms used in the debate is included as well as a list of facts and figures on key variables such as forest cover and forest loss. Contact details for some of the key people involved in CIFOR research are provided.

The third IPCC assessment report, Climate Change 2001, includes this section on the links between climate change and health. It offers a detailed look at how variations in climate, such as temperature or rainfall, could affect vector-borne disease. In particular, it evaluates computer models that predict climate impact on dengue fever and malaria. The assessment also looks at specific diseases such as leishmaniasis or schistosomiasis, explaining how the disease is spread and how changes in the environment might alter that spread.

The authors take a holistic look at the various factors involved. For example, in assessing schistosomiasis, they also consider the irrigation systems that will likely be needed to cope with expected water shortages resulting from climate change. The schistosomiasis parasite uses water snails as an intermediate host, so irrigation systems will need to be designed in such a way that they do not cause snail populations to multiply.

An update to the research on climate and vector-borne disease is also included in the fourth IPCC assessment report[796kB] although not in as much detail.

This feature article, published in the Environmental Science and Technology journal, uses the Cordillera Azul national park in Peru as an example to introduce mechanisms for reducing emissions from deforestation and forest degradation (REDD) that are under global discussion. 

The author discusses both the potential importance of and challenges associated with REDD projects. For example, although Cordillera Azul has been established as a national park by the Peruvian Government, funds for conserving it are still needed.

The article outlines some important milestones in progressing to an international framework for REDD, but notes that important details are yet to be resolved, such as how to ensure that beneficiaries of REDD funds deploy them effectively to protect forests.

The article suggests that active forest management is important and concludes with a brief introduction to the principle of proactive investment in natural capital (PINC) — the idea, promoted by the Global Canopy Programme, that forests should be regarded not only as a source of emissions, but rather as a public utility providing global ecosystem services that should be paid for.

This book, written by researchers at the Center for International Forestry Research (CIFOR), poses several critical questions that must be addressed in designing a global framework for reducing emissions from deforestation and forest degradation (REDD) to be implemented after 2012, when the first commitment period of the Kyoto Protocol runs out.

The authors frame their discussion within the 3E criteria, first proposed in the Stern Review on the Economics of Climate Change, of carbon effectiveness, cost efficiency and equity/co-benefits. Questions posed include how to set scales and baselines, deal with leakage, ensure permanence, and achieve co-benefits.

They examine various technical solutions for monitoring, reporting and verifying REDD projects, including remote sensing techniques and forest inventories. The political implications of implementing different technical options to distribute REDD income across different countries are also addressed.

The book highlights the need for flexibility in REDD strategies due to differences between countries and the need to allow for room to adapt to changes to the mechanisms as lessons are learned from initial implementation.

This information briefing, published by the Center for International Forestry Research (CIFOR), focuses on the implications of different country circumstances for measuring and monitoring forest degradation within activities for reducing emissions from deforestation and forest degradation (REDD).

The authors introduce forest degradation as a set of activities that can have different driving forces than deforestation, highlighting the fact that forests can remain degraded for a long time before becoming deforested. Degradation is typically caused by selective logging, fire and fuel wood collection.

The authors discuss monitoring, reporting and verifying (MRV) options for projects aiming to reduce forest degradation, emphasising the need to consider changes in both forest area and average carbon stocks per unit area. Based on a framework for forest transition with varying rates of deforestation and degradation, the relative importance for including degradation within REDD mechanisms for different countries is also outlined.

The briefing concludes that although monitoring and measuring degradation is more complicated than deforestation, developing a flexible MRV framework for including degradation in REDD mechanisms could be important for international equity. In particular, they expect that many African countries could benefit from the inclusion of degradation within REDD frameworks.

This policy brief, published by the Global Canopy Programme, proposes a system called Proactive Investment in Natural Capital (PINC), to reward countries for conserving large areas of tropical forest that act as 'global utilities' providing ecosystem services essential for preserving global food and energy security.

The authors suggest that the system, could complement current proposals for reducing emissions from deforestation and forest degradation (REDD). They argue that REDD could encourage countries with historically low deforestation rates to destroy their forests. They point out that if REDD successfully brings deforestation rates down — to zero eventually — then in the long-term, countries will not be able to receive payments for reducing deforestation.

The alternative, PINC, would build on existing systems that pay for ecosystem services, such as eco-certification, although scaling-up funding for standing forests is still a challenge, say the authors. To be effective, PINC requires capacity building and improved governance across the world. Land tenure reform will be needed in many countries, as will local participation in decision making and training in forest management. But, if appropriately designed, PINC could provide local communities with co-benefits such as poverty alleviation and biodiversity conservation.

This guide to reducing emissions from deforestation and forest degradation (REDD), published by the Global Canopy Programme, reviews many of the REDD proposals under discussion in global climate change negotiations.

The authors highlight why strategies for REDD are needed, then outline and compare the 32 government and nongovernmental proposals being considered by the UN Framework Convention on Climate Change (UNFCCC). They frame their analysis by examining the proposals in terms of scope, reference level, distribution mechanisms and financing options.

Visual comparisons are included to show where proposals agree and differ, and highlight areas with emerging consensus. For example, the proposals generally agree that reference levels should be set at a national level, and that a phased approach using a combination of different financing approaches could be most appropriate. Some challenges for reaching agreement on REDD measures and areas of current research are also highlighted.

The book includes a chapter summarising key research on REDD, including the Meridian Institute's Options Assessment Report, written for the Norwegian government, and several papers published by the Center for International Forestry Research (CIFOR).

This opinion article, published by the Overseas Development Institute (ODI), argues that the real challenges to effective preparation for reducing emissions from deforestation and forest degradation (REDD) are creating robust governance and funding structures, not just capacity building.

The authors outline the practicalities of developing REDD mechanisms. They note that REDD could potentially mitigate the risk of climate change, conserve biodiversity and support development in forest areas. They express concern, however, that some approaches to implementing REDD projects have had limited success and note that reducing degradation can be particularly challenging.

The report concludes with suggestions for ensuring that REDD frameworks move from preparation to successful deployment. These include careful consideration of development implications for measures taken to promote reduced forest dependence and improve links between public and private finance to encourage complementary use of funds.

This guide, published by Tebtebba (Indigenous Peoples' International Centre for Policy Research and Education), outlines the expected impacts of climate change on indigenous peoples around the world, and showcases traditional methods of climate change mitigation and adaption.

Following a basic introduction to climate change and the bodies, mechanisms and processes used for addressing it, the authors outline how climate change is impacting indigenous peoples in diverse ecosystems. For example, food and water insecurity arising from increased flooding or drought, and loss of biodiversity and traditional knowledge from rising temperatures.

The authors discuss the likely impacts of climate change mitigation measures highlighting, for example, the limitations of market-based strategies such as the Clean Development Mechanism. They discuss a range of alternative adaptation measures already being practiced by indigenous people, providing several case studies and examples of innovative strategies used in different regions. For example, African farmers using zero-tillage practices to moderate soil temperatures, Asian farmers growing varieties of crops to minimise the risk of harvest failure, and Honduran farmers using agroforestry and terracing to reduce erosion.

The authors go on to discuss measures for reducing emissions from deforestation and forest degradation (REDD) and emphasise the need for indigenous people to be fully engaged in the debate.

This policy paper, published by the World Resources Institute (WRI), suggests a range of sustainable development policies within frameworks for reducing emissions from deforestation and forest degradation (REDD).

The authors argue that there can be significant barriers to countries providing guaranteed quantified measures of emissions reductions for use in carbon trading schemes. They propose that a broader range of sustainable development policies and measures, such as building institutional capacity to reduce fires or combat illegal logging, should be included within REDD measures.

The authors recommend that developed countries encourage developing nations to reduce forest degradation, including measures that do not produce tradable carbon credits, and support a range of approaches to measure, report and verify nationally appropriate mitigation actions.

Further work is urgently needed, they say, to develop and refine these approaches, including specifying acceptable metrics, determining how to make different countries' activities comparable, and exploring alternative sources of sustainable funding.