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News articles on impact of climate change
Mongabay.com news articles on impact of climate change in blog format. Updated regularly.
Cretaceous sea levels were 550 feet higher than today
(03/06/2008) Sea levels were 550 feet (170 m) higher in the late Cretaceous period, about 80 million years ago, than today, shows a new reconstruction of historic ocean basins published in the journal Science. The authors say the work may help model current global warming-driven sea level change.
Climate change leave Arctic tundra vulnerable to fire
(03/06/2008) Research from ancient sediment cores indicates that a warming climate could make the world's arctic tundra far more susceptible to fires than previously thought. The findings are important given the potential for tundra fires to release organic carbon -- which could add significantly to the amount of greenhouse gases already blamed for global warming.
Global warming to worsen crop damage from frost
(03/03/2008) Global warming could worsen frost damage in the United States according to a new study published in the journal Bioscience.
Mapping the future of conservation
(02/28/2008) A new series of maps projecting habitat loss and the impact of climate change show that the world's most biodiverse regions are in most of need of conservation investments. The authors say the study, published online today in the journal Proceedings of the Royal Society B, will help drive future conservation decisions.
Half the Amazon rainforest will be lost within 20 years
(02/27/2008) More than half the Amazon rainforest will be damaged or destroyed within 20 years if deforestation, forest fires, and climate trends continue apace, warns a study published in Philosophical Transactions of the Royal Society B. Reviewing recent trends in economic, ecological and climatic processes in Amazonia, Daniel Nepstad and colleagues forecast that 55 percent of Amazon forests will be "cleared, logged, damaged by drought, or burned" in the next 20 years. The damage will release 15-26 billion tons of carbon into the atmosphere, adding to a feedback cycle that will worsen both warming and forest degradation in the region. While the projections are bleak, the authors are hopeful that emerging trends could reduce the likelihood of a near-term die-back. These include the growing concern in commodity markets on the environmental performance of ranchers and farmers; greater investment in fire control mechanisms among owners of fire-sensitive investments; emergence of a carbon market for forest-based offsets; and the establishment of protected areas in regions where development is fast-expanding.
Greenhouse gas emissions have already caused the Amazon to dry
(02/27/2008) Anthropogenic emissions of greenhouse gases have already caused the Amazon to dry, finds a new study published in Philosophical Transactions of the Royal Society B.
Small fires a big threat to Amazon rainforest biodiversity
(02/27/2008) Small fires have a big impact in the Amazon rainforest, report researchers writing in Philosophical Transactions of the Royal Society B. The findings suggest a dire future for Earth's largest rainforest.
Deforestation a greater threat to the Amazon than global warming
(02/25/2008) If past conditions are any indication of future conditions, the Amazon rainforest may survive considerable drying and warming caused by global warming, argue researchers in a paper published in Philosophical Transactions of the Royal Society B.
Amazon rainfall linked to Atlantic Ocean temperature
(02/25/2008) Climate models increasingly forecast a dire future for the Amazon rainforest. These projections are partly based on recent research that has linked drought in the Amazon to sea surface temperatures in the tropical Atlantic. As the tropical Atlantic warms, the southern Amazon -- the agricultural heartland of Brazil -- may see higher temperatures and less rainfall.
Widespread butterflyfish may go extinct due to global warming, pollution
(02/24/2008) The Chevroned Butterflyfish, a colorful fish found in tropical oceans around the world, faces extinction due to overexploitation, pollution and climate change, report researchers writing in the journal Behavioural Ecology and Sociobiology. Despite its widespread distribution, the species could be doomed by its specialized feeding habitats: the Chevroned Butterflyfish (Chaetodon trifascialis) feeds on only one type of coral.
Melting of permafrost could trigger rapid global warming warns UN
(02/21/2008) Melting of the Arctic permafrost is a "wild card" that could dramatically worsen global warming by releasing massive amounts of greenhouse gases, warned the U.N. on Wednesday at a meeting in Monaco.
Private sector pumping hundreds of billions into cleantech
(02/21/2008) The private sector is "pumping hundreds of billions of dollars" into cleaner and renewable energies, says a new publication released yesterday by the United Nations Environment Programme (UNEP).
NASA: warming is causing Greenland ice to melt faster than expected
(02/21/2008) Warming air temperatures are causing Greenland's ice sheet to melt faster than previously anticipated, reported NASA on Wednesday. Though unlikely, the complete melting of Greenland's ice sheet would raise global sea level by 23 feet.
Large-scale Amazon deforestation or drying would have dire global consequences
(02/21/2008) A new study shows that large-scale degradation of the Amazon, either through drying or continued deforestation, would have global consequence, including worsening climate change, causing regional vegetation shifts, and increasing dust in the atmosphere.
Global warming - not el Nino - drove severe Amazon drought in 2005
(02/20/2008) One of the worst droughts on record in the Amazon was caused by high temperatures in the Atlantic rather than el Nino. The research, published in Philosophical Transactions of the Royal Society B, suggests that human-driven warming is already affecting the climate of Earth's largest rainforest.
Ancient Amazon fires linked to human populations
(02/20/2008) Analysis of soil charcoal in South America confirms that from a historical perspective, fire is rare in the Amazon rainforest, but when it does occur, it appears linked to human activities. The research, published in Philosophical Transactions of the Royal Society B, is based on dating of soil carbon, which provides a good indication of when fires occurred in Amazonia, according to lead author Mark Bush, head of the Department of Biology at Florida Institute of Technology.
conservation strategies can mitigate the impact of global warming in the Amazon
(02/19/2008) Careful design of protected areas to safeguard key "refugia" and allow for migration can increase the resilience of Amazon biodiversity to climate change, report researchers writing in Philosophical Transactions of the Royal Society B.
Photos of bizarre creatures discovered in Antarctica
(02/19/2008) Researchers aboard the Aurora Australis, an Australian vessel, have discovered a trove of strange creatures on the sea floor near East Antarctica.
Small Amazon farmers especially vulnerable to climate change
(02/19/2008) Communicating the impact of climate change to small farmers in the Amazon will be key in helping them adapt to higher temperatures, more frequent and intense drought, and greater incidence of forest fires forecast for the region, according to a paper published in Philosophical Transactions of the Royal Society B.
Fire policy is key to reducing the impact of drought on the Amazon
(02/19/2008) Gaining control over the setting of fires for land-clearing in the Amazon is key to reducing deforestation and the impact of severe drought on the region's forests, write researchers in a paper published in Philosophical Transactions of the Royal Society B.
How will global warming affect marine food chains?
(02/17/2008) Rising temperatures and acidity of the world's oceans due to human emissions of carbon dioxide is putting marine food webs at risk warned a researcher speaking at a press briefing at the annual meeting of the American Association for the Advancement of Science in Boston.
Why are oceans at risk from global warming?
(02/17/2008) Climate change is putting the world's oceans at risk by increasing the temperature and acidity of seawater, and altering atmospheric and oceanic circulation, warned a panel of scientists this week at the American Association for the Advancement of Science (AAAS) annual meeting in Boston.
Warming could bring sharks to Antarctica with devastating ecological consequences
(02/15/2008) Global warming could make the waters around Antarctica hospitable to sharks for the first time in 40 million years. Their return could have devastating ecological consequences report researchers from the University of Rhode Island.
Lake Mead could be dry up by 2021
(02/12/2008) There is a 50 percent chance Lake Mead, a key source of water for millions of people in the southwestern U.S., will be dry by 2021 if climate changes as expected and future water usage is not curtailed, a new study finds.
Bloomberg: global warming "just as lethal" as terrorism
(02/12/2008) New York City mayor Michael Bloomberg told reporters Monday that global warming is as big a threat to humanity as terrorism, according to Reuters.
Global warming puts penguins at risk of extinction
(02/11/2008) Climate change could put the long-term survival of sub-Antarctic King Penguins at risk by reducing the availability of prey, reports a new study published in Proceedings of the National Academy of Sciences.
Global warming to increase insect attacks on plants
(02/11/2008) Global warming will increase attacks on plant leaves by insects, reports a study published in Proceedings of the National Academy of Sciences.
Natural ocean thermostat may protect some coral reefs
(02/07/2008) Natural processes may prevent oceans from warming beyond a certain point, helping protect some coral reefs from the impacts of climate change, new research finds. The study provides evidence that an ocean "thermostat" may be helping regulate sea-surface temperatures in a biologically diverse region of the western Pacific.
Climate system approaching 9 critical tipping points
(02/04/2008) Earth is approaching and may pass nine important climate tipping points this century, according to research published this week in Proceedings of the National Academy of Science (PNAS).
Global warming to hurt agriculture in world's poorest regions
(01/31/2008) Global warming wil cause severe crop losses in some of the poorest parts of Africa and Asia by 2030, reports a study published in tomorrow's issue of the journal Science.
Globl warming worsening U.S. water crisis
(01/31/2008) Human-induced climate change is accelerating a water crisis in the American West, reports a study published this week in the journal Science.
Largest body of geologists issues warning on global warming
(01/24/2008) A statement newly released by the world's largest scientific society of Earth and space scientists--the American Geophysical Union, or AGU--updates the organization's position on climate change: the evidence for it, potential consequences from it, and how to respond to it.
55% of the Amazon may be lost by 2030
(01/23/2008) Cattle ranching, industrial soy farming, and logging are three of the leading drivers of deforestation in the Brazilian Amazon. As commodity prices continue to rise, driven by surging demand for biofuels and grain for meat production, the economic incentives for developing the Amazon increase. Already the largest exporter of beef and the second largest producer of soy - with the largest expanse of "undeveloped" but arable land of any country - Brazil is well on its way to rivaling the U.S. as the world's agricultural superpower. The trend towards turning the Amazon into a giant breadbasket seems unstoppable. Nevertheless the decision at the U.N. climate talks in Bali to include "Reducing Emissions From Deforestation and Degradation" (REDD) in future climate treaty negotiations may preempt this fate, says Dr. Daniel Nepstad, a scientist at the Woods Hole Research Institute.
Photos: Top 100 most threatened amphibians named
(01/21/2008) Due to numerous factors--including habitat destruction, pollution, climate change, and chytrid fungus--amphibians are probably the most threatened taxon of species in the world. Dr Jonathan Baillie, head of the EDGE organization which has just established an amphibian program, stated that "tragically, amphibians tend to be the overlooked members of the animal kingdom, even though one in every three amphibian species is currently threatened with extinction, a far higher proportion than that of bird or mammal species." To help save these species on the brink, EDGE, apart of the Zoological Society of London, has compiled a list of the hundred most threatened and evolutionary distinct amphibians.
Rich countries grow at ecological expense of poor countries
(01/21/2008) The costs of environmental degradation caused by rich countries are disproportionately falling on the world's poorest countries, reports an analysis published in the journal Proceedings of the National Academy of Sciences.
Climate change causes shift in American bird ranges
(01/16/2008) Breeding ranges of North American birds have shifted northward coinciding with a period of increasing global temperatures, report researchers writing in the April issue of conservation Biology.
Global warming will diminish fish catch in the Bering sea
(01/16/2008) One half of the fish caught in the U.S. annually--and almost a third worldwide--come from the Bering Sea. Yet, this vast resource is increasingly threatened by climate change. A recent study, published in Marine Ecology Progress Series, showed that global warming will greatly affect the Bering Sea's phytoplankton, the cornerstone of the sea's rich ecosystem.
Rising CO2 levels tied to increasing human mortality
(01/03/2008) Rising carbon dioxide levels have been tied to increases in human mortality, reports a study to be published in Geophysical Research Letters.
North Atlantic warming is natural, not due to climate change
(01/03/2008) While overall temperature in the North Atlantic Ocean has risen over the past fifty years, it has not been consistent across all areas with subpolar regions cooling as subtropical and tropical waters warmed, reports a new study published in the journal Science.
Carbon uptake by temperate forests declining due to global warming
(01/03/2008) North American forests are storing less carbon due to warmer autumns, reports a study published in the journal Nature by an international team of researchers.
As amphibians leap toward extinction, alliance pushes "The Year of the Frog"
(12/31/2007) With amphibians experiencing dramatic die-offs in pristine habitats worldwide, an alliance of zoos, botanical gardens and aquariums has launched a desperate public appeal to raise funds for emergency conservation measures. Scientists say that without quick action, one-third to one-half the world's frogs, toads, salamanders, newts and caecilians could disappear.
Lack of A-bomb signatures suggest 50 years of shrinking Tibetan glaciers
(12/30/2007) Ice cores drilled last year from the summit of a Himalayan ice field lack the distinctive radioactive signals that mark virtually every other ice core retrieved worldwide. That missing radioactivity, originating as fallout from atmospheric nuclear tests during the 1950s and 1960s, routinely provides researchers with a benchmark against which they can gauge how much new ice has accumulated on a glacier or ice field.
Scientists: cut emissions now to avoid climate tipping point
(12/14/2007) Countries need to act soon to cut carbon dioxide emissions if the worst impacts of global warming are to be avoided, warned a panel of scientists speaking Thursday at the fall meeting of the American Geophysical Union in San Francisco.
Global warming will degrade 98% of coral reefs by 2050
(12/13/2007) Ocean acidification caused by human-induced carbon dioxide emissions could dramatically alter the planet's coral reefs and marine food chains, warns research published in the December 14 issue of Science and presented at the fall meeting of the American Geophysical Union (AGU) in San Francisco.
Natural climate variations have larger effect on hurricanes than global warming
(12/12/2007) Natural climate variations, which tend to involve localized changes in sea surface temperature, may have a larger effect on hurricane activity than the more uniform patterns of global warming, a report in this week's Nature suggests.
Climate change already affecting water supplies in the Western U.S.
(12/11/2007) Climate change is already impacting water supplies in the western United States and is likely to reducer carbon sequestration by regional ecosystems, reports research presented at the fall meeting of the American Geophysical Union in San Francisco.
Greenland ice sheet melting hits record in 2007
(12/11/2007) The 2007 melt extent on the Greenland ice sheet broke the 2005 summer melt record by 10 percent, making it the largest ever recorded there since satellite measurements began in 1979, according to a University of Colorado at Boulder climate scientist.
Melting of Greenland ice sheet could alter warming trend
(12/06/2007) A massive release from freshwater from the glacial Lake Agassiz 8,200 years ago triggered dramatic cooling in the North Atlantic region, report researchers writing in Science. The sudden and intense cooling, which ended the stable climate that had characterized the Holocene warm period, could have future implications for the melting of Greenland's ice sheet.
Global warming accelerates destruction of the Amazon
(12/06/2007) Deforestation and climate change could damage or destroy as much as 60 percent of the Amazon rainforest by 2030, according to a new report from environmental group WWF. The report, The Amazon's Vicious Cycles: Drought and Fire in the Greenhouse, shows that degradation in the Amazon could release 55-97 million tons of carbon dioxide by 2030. Forest loss could also dramatically impact water cycles in the region, affecting rainfall that is critical for river flows and agriculture.
Global warming will significantly increase bird extinctions
(12/06/2007) Where do you go when you've reached the top of a mountain and you can't go back down? It's a question increasingly relevant to plants and animals, as their habitats slowly shift to higher elevations, driven by rising temperatures worldwide. The answer, unfortunately, is you can't go anywhere. Habitats shrink to the vanishing point, and species go extinct. That scenario is likely to be played out repeatedly and at an accelerating rate as the world continues to warm, Stanford researchers say.
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