3 results
Ten new insights in climate science 2020 – a horizon scan
- Erik Pihl, Eva Alfredsson, Magnus Bengtsson, Kathryn J. Bowen, Vanesa Cástan Broto, Kuei Tien Chou, Helen Cleugh, Kristie Ebi, Clea M. Edwards, Eleanor Fisher, Pierre Friedlingstein, Alex Godoy-Faúndez, Mukesh Gupta, Alexandra R. Harrington, Katie Hayes, Bronwyn M. Hayward, Sophie R. Hebden, Thomas Hickmann, Gustaf Hugelius, Tatiana Ilyina, Robert B. Jackson, Trevor F. Keenan, Ria A. Lambino, Sebastian Leuzinger, Mikael Malmaeus, Robert I. McDonald, Celia McMichael, Clark A. Miller, Matteo Muratori, Nidhi Nagabhatla, Harini Nagendra, Cristian Passarello, Josep Penuelas, Julia Pongratz, Johan Rockström, Patricia Romero-Lankao, Joyashree Roy, Adam A. Scaife, Peter Schlosser, Edward Schuur, Michelle Scobie, Steven C. Sherwood, Giles B. Sioen, Jakob Skovgaard, Edgardo A. Sobenes Obregon, Sebastian Sonntag, Joachim H. Spangenberg, Otto Spijkers, Leena Srivastava, Detlef B. Stammer, Pedro H. C. Torres, Merritt R. Turetsky, Anna M. Ukkola, Detlef P. van Vuuren, Christina Voigt, Chadia Wannous, Mark D. Zelinka
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- Journal:
- Global Sustainability / Volume 4 / 2021
- Published online by Cambridge University Press:
- 27 January 2021, e5
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Non-technical summary
We summarize some of the past year's most important findings within climate change-related research. New research has improved our understanding of Earth's sensitivity to carbon dioxide, finds that permafrost thaw could release more carbon emissions than expected and that the uptake of carbon in tropical ecosystems is weakening. Adverse impacts on human society include increasing water shortages and impacts on mental health. Options for solutions emerge from rethinking economic models, rights-based litigation, strengthened governance systems and a new social contract. The disruption caused by COVID-19 could be seized as an opportunity for positive change, directing economic stimulus towards sustainable investments.
Technical summaryA synthesis is made of ten fields within climate science where there have been significant advances since mid-2019, through an expert elicitation process with broad disciplinary scope. Findings include: (1) a better understanding of equilibrium climate sensitivity; (2) abrupt thaw as an accelerator of carbon release from permafrost; (3) changes to global and regional land carbon sinks; (4) impacts of climate change on water crises, including equity perspectives; (5) adverse effects on mental health from climate change; (6) immediate effects on climate of the COVID-19 pandemic and requirements for recovery packages to deliver on the Paris Agreement; (7) suggested long-term changes to governance and a social contract to address climate change, learning from the current pandemic, (8) updated positive cost–benefit ratio and new perspectives on the potential for green growth in the short- and long-term perspective; (9) urban electrification as a strategy to move towards low-carbon energy systems and (10) rights-based litigation as an increasingly important method to address climate change, with recent clarifications on the legal standing and representation of future generations.
Social media summaryStronger permafrost thaw, COVID-19 effects and growing mental health impacts among highlights of latest climate science.
Validation of the energy budget of an alpine snowpack simulated by several snow models (Snow MIP project)
- Pierre Etchevers, Eric Martin, Ross Brown, Charles Fierz, Yves Lejeune, Eric Bazile, Aaron Boone, Yong-Jiu Dai, Richard Essery, Alberto Fernandez, Yeugeniy Gusev, Rachel Jordan, Victor Koren, Eva Kowalczyk, N. Olga Nasonova, R. David Pyles, Adam Schlosser, Andrey B. Shmakin, Tatiana G. Smirnova, Ulrich Strasser, Diana Verseghy, Takeshi Yamazaki, Zong-Liang Yang
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- Journal:
- Annals of Glaciology / Volume 38 / 2004
- Published online by Cambridge University Press:
- 14 September 2017, pp. 150-158
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Many snow models have been developed for various applications such as hydrology, global atmospheric circulation models and avalanche forecasting. The degree of complexity of these models is highly variable, ranging from simple index methods to multi-layer models that simulate snow-cover stratigraphy and texture. In the framework of the Snow Model Intercomparison Project (SnowMIP), 23 models were compared using observed meteorological parameters from two mountainous alpine sites. The analysis here focuses on validation of snow energy-budget simulations. Albedo and snow surface temperature observations allow identification of the more realistic simulations and quantification of errors for two components of the energy budget: the net short- and longwave radiation. In particular, the different albedo parameterizations are evaluated for different snowpack states (in winter and spring). Analysis of results during the melting period allows an investigation of the different ways of partitioning the energy fluxes and reveals the complex feedbacks which occur when simulating the snow energy budget. Particular attention is paid to the impact of model complexity on the energy-budget components. The model complexity has a major role for the net longwave radiation calculation, whereas the albedo parameterization is the most significant factor explaining the accuracy of the net shortwave radiation simulation.
Better Regulation – An Ongoing Journey
- Peter Chase, Adam Schlosser
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- Journal:
- European Journal of Risk Regulation / Volume 6 / Issue 3 / September 2015
- Published online by Cambridge University Press:
- 20 January 2017, pp. 378-379
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The Commission's new Better Regulation package represents a step forward in the European Union’s decade–long journey to bringing coherence and rationality to its legislative and regulatory process. But as the Communication on the package itself suggests, the journey is far from over.
The Communication consistently emphasizes the key aspects of good regulation: quality over quantity; taking time to get proposals right; evidence–based decision making; open and continuous consultation to gather evidence from all stakeholders; rigorous impact assessments and cost–benefit analysis; applying these tools to regulatory measures as well as legislation; and implementing a robust ex–post evaluation program. It is important as well that the Secretariat General published unified and detailed guidance for Commission officials on how each step of the regulatory process should work, with a “tool–box” to elaborate further on these steps.
All of this is good. Yet in some areas, the Commission misses opportunities to go farther down the good governance road, and in others the guidance needs to be made much more explicit.