Effects of a Warming Planet on Tropical Lizards May Not be Significant
May 18, 2013 07:50 AM - Dartmouth University via ScienceDaily
A new Dartmouth College study finds human-caused climate change may have little impact on many species of tropical lizards, contradicting a host of recent studies that predict their widespread extinction in a rapidly warming planet. Most predictions that tropical cold-blooded animals, especially forest lizards, will be hard hit by climate change are based on global-scale measurements of environmental temperatures, which miss much of the fine-scale variation in temperature that individual animals experience on the ground, said the article's lead author, Michael Logan, a Ph.D. student in ecology and evolutionary biology.
Ice Age Climate Changed Quickly
May 17, 2013 06:24 AM - Alex Peel, Planet Earth Online
Short, sharp fluctuations in the Earth's climate throughout the last ice age may have stopped trees from getting a foothold in Europe and northern Asia, scientists say. According to a new study, warm spells were so brief that trees were unable to establish themselves before the temperature shot back down again. 'The warm events were so short-lived that ecosystems weren't able to respond in full,' says Professor Brian Huntley, of Durham University, who led the study.
Study Shows Scientists Agree on Anthropogenic Climate Change
May 16, 2013 06:02 AM - ScienceDaily
A comprehensive analysis of peer-reviewed articles on the topic of global warming and climate change has revealed an overwhelming consensus among scientists that recent warming is human-caused. The study is the most comprehensive yet and identified 4000 summaries, otherwise known as abstracts, from papers published in the past 21 years that stated a position on the cause of recent global warming -- 97 per cent of these endorsed the consensus that we are seeing human-made, or anthropogenic, global warming (AGW) Led by John Cook at the University of Queensland, the study has been published 16 May, in IOP Publishing's journal Environmental Research Letters.
What Do You Think About Geo-engineering?
May 15, 2013 07:16 AM - Harriet Jarlett, Planet Earth Online
Few members of the UK public are comfortable with the idea of injecting aerosols high into the atmosphere to help slow down climate change, a study has found. People voiced concerns that this type of approach fails to address the basic problem of increasing greenhouse gas emissions. They are also nervous about any unintended consequences of such an action. But most significantly, they say that injecting aerosols into the Earth's atmosphere raises problems of international governance and control: who would ultimately be responsible?
Nature is Good for your Health!
May 14, 2013 06:31 AM - Richard J Dolesh, The Ecologist
A walk in the park can calm and restore you. This is something we take for granted in parks and recreation, because we have known it to be true ever since we started spending time in nature. But new research reported in the British Journal of Sports Medicine now provides scientific proof that walking in nature and spending time under leafy shade trees causes electrochemical changes in the brain that can lead people to enter a highly beneficial state of "effortless attention." The UK researchers state with some justifiable academic stuffiness that "..happiness, or the presence of positive emotional mindsets, broadens an individual's thought-action repertoire with positive benefits to physical and intellectual activities, and to social and psychological resources."
What is Really Pristine Wilderness Really?
May 13, 2013 08:20 PM - Fred Pearce, Yale Environment360
New research shows that humans have been transforming the earth and its ecosystems for millenniums — far longer than previously believed. These findings call into question our notions about what is unspoiled nature and what should be preserved. Are there any pristine ecosystems out there? The evidence is growing that our ideas about virgin nature are often faulty. In fact, the lush rainforest or wind-blown moorland we think is natural may be a human creation, with alien creatures from distant lands living beside native species. Realizing this will change our ideas about how ecosystems work and how we should do conservation. We like to think that most nature was pristine and largely untouched until recent times. But two major studies in recent weeks say we are deluded. In one, Erle Ellis, a geographer at the University of Maryland Baltimore County, and colleagues have calculated that at least a fifth of the land across most of the world had been transformed by humans as early as 5,000 years ago — a proportion that past studies of historical land use had assumed was only reached in the past 100 years or so.
Web tool tracks insecticide-resistant malaria mosquitoes
May 13, 2013 05:06 PM - Calvin Otieno, SciDevNet
An online mapping system to track insecticide resistance in malaria-causing mosquitoes around the world has been launched. The free interactive website identifies places in more than 50 malaria-endemic countries where mosquitoes have become resistant to the insecticides used in bed nets and indoor sprays. IR Mapper was launched last month (25 April) by Vestergaard Frandsen, a Swiss firm that makes disease-control products, and the KEMRI/CDC research and public health collaboration based in Kenya.
CO2 Levels Top 400 ppm at Hawaii Monitoring Station
May 11, 2013 07:38 AM - Roger Greenway, ENN
CO2 levels have been increasing relatively steadily for more than 50 years. On May 9, the daily mean concentration of carbon dioxide in the atmosphere of Mauna Loa, Hawaii, surpassed 400 parts per million (ppm) for the first time since measurements began in 1958. Independent measurements made by both NOAA and the Scripps Institution of Oceanography have been approaching this level during the past week. It marks an important milestone because Mauna Loa, as the oldest continuous carbon dioxide (CO2) measurement station in the world, is the primary global benchmark site for monitoring the increase of this potent heat-trapping gas. Carbon dioxide pumped into the atmosphere by fossil fuel burning and other human activities is the most significant greenhouse gas (GHG) contributing to climate change. Its concentration has increased every year since scientists started making measurements on the slopes of the Mauna Loa volcano. The rate of increase has accelerated since the measurements started, from about 0.7 ppm per year in the late 1950s to 2.1 ppm per year during the last 10 years.
EU Imposes Large Duty on Solar Panels from China
May 10, 2013 06:17 AM - EurActiv
The European Commission agreed to impose punitive import duties on solar panels from China in a move to guard against what it sees as dumping of cheap goods in Europe, prompting a cautious response from Beijing which called for further dialogue. EU commissioners backed EU Trade Chief Karel De Gucht's proposal to levy the provisional duties by 6 June and make Chinese solar exports less attractive, two officials said. Shares in German manufacturers SolarWorld, Phoenix Solar and Centrotherm rose sharply, while China's Suntech fell heavily.
The Regional Centre for Climate Change and Decision-Making
May 9, 2013 06:53 AM - Daniela Hirschfeld, SciDevNet
South America has got its first think-tank aimed at providing climate change knowledge to decision-makers to help them design tools tailored to local needs. The Regional Centre for Climate Change and Decision-Making was launched earlier this year (19 March) in Montevideo, Uruguay, where it will have its headquarters and where it is organising its first training event for policymakers. The centre is a joint initiative by the Panama-based Avina Foundation, which promotes sustainable development in Latin America, and UNESCO (the UN Educational, Scientific and Cultural Organization).