Global warming is unequivocal: The 2007 IPCC Assessment

Climatic Change, 2012

Assessments conducted by the Intergovernmental Panel on Climate Change (IPCC) are significant undertakings that require input from experts and practitioners in multiple scientific disciplines, integrating local to international information across spatial and temporal scales. An IPCC report is a unique collaboration between the scientific community and policymakers, with governments (through their Focal Points) providing guidance and input to the scientists conducting an assessment at several stages during the process. This commentary reviews the IPCC mandate and process; summarizes key themes to be addressed in the Working Group II contribution to the 5th assessment report; discusses challenges for the WGII report when assessing qualitative literature, incorporating local knowledge, and identifying particularly vulnerable groups; and touches on the expertise and commitment of the WGII authors. Active engagement of the wider scientific community in IPCC assessments through publication and review will enhance their relevance to decision-and policy-makers.

Weather, 2002

Climate Change 2001: The Scientific Basis is the most comprehensive and up-to-date scientific assessment of past, present and future climate change. The report: • Analyses an enormous body of observations of all parts of the climate system. • Catalogues increasing concentrations of atmospheric greenhouse gases. • Assesses our understanding of the processes and feedbacks which govern the climate system. • Projects scenarios of future climate change using a wide range of models of future emissions of greenhouse gases and aerosols. • Makes a detailed study of whether a human influence on climate can be identified. • Suggests gaps in information and understanding that remain in our knowledge of climate change and how these might be addressed. Simply put, this latest assessment of the IPCC will again form the standard scientific reference for all those concerned with climate change and its consequences, including students and researchers in environmental science, meteorology, climatology, biology, ecology and atmospheric chemistry, and policymakers in governments and industry worldwide. J.T. Houghton is Co-Chair of Working Group I, IPCC. Y. Ding is Co-Chair of Working Group I, IPCC.

Environmental Science and Pollution Research, 1996

SSRN Electronic Journal, 2021

The recent IPCC report on Climate Change calls for immediate actions from governments, requiring tremendous efforts and expenses worldwide. However, the science behind this report is far from clear. It reinforces the false sense of scientific "consensus", while in fact does not answer the most fundamental questions, many of which have been raised long time ago. We reformulate those questions for the authors of the Report and add some other ones with a hope that they will be unequivocally and publicly answered. The stakes are too high to ignore obvious logical and factual faults of the Report. Statistical analysis with several techniques is also performed; it shows no evident support to the hypothesis of the anthropogenic impact to the temperature change.

Earth's Future, 2014

The development of human civilisations has occurred at a time of stable climate. This climate stability is now threatened by human activity. The rising global climate risk occurs at a decisive moment for world development. World nations are currently discussing a global development agenda consequent to the Millennium Development Goals (MDGs), which ends in 2015. It is increasingly possible to envisage a world where absolute poverty is largely eradicated within one generation and where ambitious goals on universal access and equal opportunities for dignified lives are adopted. These grand aspirations for a world population approaching or even exceeding nine billion in 2050 is threatened by substantial global environmental risks and by rising inequality. Research shows that development gains, in both rich and poor nations, can be undermined by social, economic and ecological problems caused by human-induced global environmental change. Climate risks, and associated changes in marine and terrestrial ecosystems that regulate the resilience of the climate system, are at the forefront of these global risks. We, as citizens with a strong engagement in Earth system science and socio-ecological dynamics, share the vision of a more equitable and prosperous future for the world, yet we also see threats to this future from shifts in climate and environmental processes. Without collaborative action now, our shared Earth system may not be able to sustainably support a large proportion of humanity in the decades ahead.

Annual Review of Environment and Resources, 2017

The Intergovernmental Panel on Climate Change (IPCC) conducts policy-relevant but not policy-prescriptive assessments of climate science. In this review, we engage with some of the key design features, achievements, and challenges that situate and characterize the IPCC as an intergovernmental organization that is tasked with producing global environmental assessments (GEAs). These include the process of working through consensus to assess and summarize climate science and the need to include knowledge from as many of the 195 IPCC nation-states as possible, despite the structural inequalities between developed and developing countries. To highlight salient features that are unique to the IPCC but that offer lessons for other organizations that conduct GEAs, we include case studies on the politics of climate denialism, the use of geoengineering in mitigation scenarios, and the links between adaptive capacity, adaptation, and global development. We conclude with a discussion of institu...

2001

VARIOUS, 2019

More than a million students, workers, and others poured into the streets of major cities across the world on Friday, in what was likely the largest protest to date demanding action to halt climate change. The kickoff of the Global Climate Strike, ahead of the United Nations Climate Action Summit in New York this week, was the latest and loudest signal yet that climate activism is coalescing into a powerful global movement. REPORT United In Science High-level synthesis report of latest climate science information convened by the Science Advisory Group of the UN Climate Action Summit 2019 REPORT ATTACHED Foreword by António Guterres, United Nations Secretary-General ""Climate change is the defining challenge of our time. This important document by the United Nations and global partner organizations, prepared under the auspices of the Science Advisory Group of the Climate Action Summit, features the latest critical data and scientific findings on the climate crisis. It shows how our climate is already changing, and highlights the far-reaching and dangerous impacts that will unfold for generations to come."" Science informs governments in their decision-making and commitments. I urge leaders to heed these facts, unite behind the science and take ambitious, urgent action to halt global heating and set a path towards a safer, more sustainable future for all. The UN Climate Action Summit 2019 Science Advisory Group called for this High Level Synthesis Report, to assemble the key scientific findings of recent work undertaken by major partner organizations in the domain of global climate change research, including the World Meteorological Organization, UN Environment, Global Carbon Project, the Intergovernmental Panel on Climate Change, Future Earth, Earth League and the Global Framework for Climate Services. The Report provides a unified assessment of the state of our Earth system under the increasing influence of anthropogenic climate change, of humanity’s response thus far and of the far-reaching changes that science projects for our global climate in the future. The scientific data and findings presented in the report represent the very latest authoritative information on these topics. It is provided as a scientific contribution to the UN Climate Action Summit 2019, and highlights the urgent need for the development of concrete actions that halt the worst effects of climate change. The Synthesis Report is an example of the international scientific community’s commitment to strategic collaboration in order to advance the use of scientific evidence in global policy, discourse and action. The Science Advisory Group will remain committed to providing its expertise to support the global community in tackling climate change on the road to COP 25 in Santiago and beyond. Science Advisory Group Members: Dr Navroz K. Dubash Center for Policy Research, New Delhi India Dr Heide Hackmann International Science Council Dr Brigitte Knopf Mercator Research Institute on Global Commons and Climate Change Dr Thelma Krug Intergovernmental Panel on Climate Change Dr Margaret Leinen Scripps Institute of Oceanography University of California Dr Jian Liu UN Environment (UNEP) Dr Yacob Mulugetta University College London Dr Joeri Rogelj Imperial College London Dr Maisa Rojas Corradi University of Chile Dr Lisa Schipper University of Oxford UPDATES https://www.washingtonpost.com/climate-environment/2019/09/25/new-un-climate-report-massive-change-already-here-worlds-oceans-frozen-regions/?wpisrc=al_news__alert-hse--alert-national&wpmk=1

Bulletin of the American Meteorological Society, 2009

With the IPCC concluding that climate change is now virtually inevitable, an international panel makes recommendations regarding research and observations that would 7|l help improve climate forecasts, assess vulnerabilities and improve adaptation strategies, This view-from-above of Sydney, Australia exemplifies the close interaction between man and his environment and reminds us of the local scales over which climate change will affect human, natural, and economic systems. These relationships and how they should drive future research were discussed during a workshop held in Sydney in October, 2007. (Image courtesy of NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team) T he periodic assessments of the Intergovernmental Panel on Climate Change (IPCC) of the causes, impacts, and possible response strategies to climate change are the most comprehensive and up-to-date reports available on the subject and form the standard reference for all concerned with climate change in academia, government, and industry worldwide. Hundreds of international experts contributed to the IPCC's Fourth Assessment Report (AR4), which has received unprecedented attention and acclaim by policy makers, scientists, industry, and the general public.