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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.
(10/06/2008) Madagascar has more than 100 types of lemurs, but the most famous species is the ringtailed lemur, a primate found widely in the southern part of the Indian Ocean island. The world's leading expert on ringtailed lemurs is Alison Jolly, presently a Visiting Scientist at the University of Sussex in the UK. Since arriving on the Indian Ocean island in 1963, Jolly has documented the behavior and population dynamics of ringtailed lemurs in Berenty, a small private reserve of gallery forest amid a sea of desert-like spiny forest in southern Madagascar.
Arctic sea ice "likely" hit lowest volume on record in 2008
(10/03/2008) The volume of sea ice in the Arctic has likely hit its lowest level since satellite measurements began in 1979, report researchers at the University of Colorado at Boulder's National Snow and Ice Data Center, who confirmed that Arctic sea ice extent was the second-lowest on record this year.
20 waterbirds added to threatened list
(10/02/2008) The U.N. has added 20 species of migratory waterbird to the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) giving them greater international protection in Africa, Europe, and Asia.
Past climate change drove mass extinction in Pakistan
(09/26/2008) Research on long-vanished mammals in the Siwalik region of Northern Pakistan has yielded results relevant for today. In the span of two-and-a-half million years climate change caused a shift in Siwalik habitat from wet monsoon forest to savannah, dooming over half the mammal species to local extinction. The research was published by the Proceedings of the National Academy of Sciences.
Arctic sea ice falls to second lowest on record
(09/16/2008) Arctic sea ice retreated to the second lowest level on record but remains about 9 percent above the low set last September, reports the NASA and the National Snow and Ice Data Center in Boulder, Colorado.
Earth already committed to 2.4-degree C rise from climate change
(09/15/2008) As of 2005 the Earth was already committed to rise of global mean temperatures by 2.4°C (4.3°F), concludes a new study published in the journal Proceedings of the National Academy of Sciences (PNAS). The conclusion is significant because the Intergovernmental Panel on Climate Change (IPCC) has warned that a rise in global temperature by 1 to 3°C will lead to catastrophic consequences, including “widespread loss of biodiversity, widespread deglaciation of the Greenland Ice Sheet, and a major reduction of area and volume of Hindu-Kush-Himalaya-Tibetan glaciers, which provide the head-waters for most major river systems of Asia.” These glaciers, predicted to shrink considerably in the next few decades, provide food and water to over two billion people.
Migratory waterbird populations in decline in Europe
(09/15/2008) 41 percent of 522 migratory waterbird populations on the routes across Africa and Eurasia show decreasing trends, reports a new study released at the African-Eurasian Migratory Waterbird Agreement meeting in Antananarivo, Madagascar.
NASA: Sea ice melt opens the Northwest and Northeast Passage
(09/09/2008) An image released by NASA shows that Arctic sea ice has retreated to the point where both the Northwest Passage around North America and the Northern Sea Route around Russia are open simultaneously. The occurrence marks the first time on record that both passages have been open.
Sea level rise likely limited to 2-6 feet by 2100
(09/04/2008) Global sea level rise is unlikely to exceed 2 meters (6 1/2 feet) by the end of century argues a new study published in the journal Science.
Canada's ice shelves lost 23% of their area this summer
(09/03/2008) A 19-square-mile (50 sq km) chuck of ice shelf broke off from Canada's Ellesmere Island in the northern Arctic, reports the Associated Press. The Manhattan-sized ice shelf is now adrift in the Arctic Ocean. It is the largest of more than 83 sq mi (214 sq km) of ice shelf that has broken up in the Canadian Arctic this year.
Powerful hurricanes may be getting stronger due to warmer seas
(09/03/2008) Warming climate is causing the strongest hurricanes to strengthen and more moderate storms to stay the same, claims a new study published in Nature. However the data on which research is based is already facing fierce criticism.
Past decade is warmest in at least 1300 years
(09/01/2008) A reconstruction of surface temperatures over the past two thousand years provides further evidence that the northern hemisphere is now warmer than at any time in at least 1300 years. The research, published in the online edition of the Proceedings of the National Academy of Sciences, in the Northern Hemisphere are higher than those of the Medieval warm period.
Melting permafrost will be major driver of global warming
(09/01/2008) The thawing of permafrost in northern latitudes will become a major source of greenhouse gas emissions, according to a new study that more than doubles previous estimates of the amount of carbon stored in the frozen soils of Alaska and Siberia.
Sea levels may rise 2-3 times faster than expected
(08/31/2008) Global sea level rise this century from a melting Greenland ice sheet may be two to three times greater than current estimates warn researchers writing in journal Nature Geoscience.
Sea ice extent falls to second lowest on record
(08/27/2008) Arctic sea ice extent presently stands at it second-lowest level on record and could set a new low in coming weeks, reports the National Snow and Ice Data Center (NSIDC).
Climate change may increase global conflict
(08/25/2008) The signs of a warming world are everywhere: birds are migrating with changing temperatures; coral reefs are dying out due to bleaching; warmer winters are allowing beetles to devour Canadian forests; and the Northwest Passage has opened for the second year in a row. While scientists work to understand how climate change is affecting the worldÕs ecosystems, others are attempting to predict how societies may respond. Jurgen Scheffran, a scientist with the Program in Arms Control, Disarmament and International Security at the University of Illinois, believes a warmer world will lead to an increase in armed conflicts. He concludes that societies stressed by increased competition for natural resources are more likely to engage in warfare.
French birds on the move due to climate change—just not fast enough
(08/21/2008) French ornithologists have discovered, year by year, that French birds are moving north due to the affects of climate change. A recent study of such movements in the Royal Society journal Proceedings B concludes that the birds are not moving fast enough, leading to concern among conservationists.
The long-ignored ocean emergency and what can be done to address it
(08/18/2008) This year has been full of bad news regarding marine ecosystems: one-third of coral species threatened with extinction, dead-zones spread to 415 sites, half of U.S. reefs in fair or bad condition, increase in ocean acidification, tuna and shark populations collapsing, and only four percent of ocean considered pristine. Jeremy Jackson, director of the Scripps Center for Marine Biodiversity and Conservation at the University of California, San Diego, synthesizes such reports and others into a new paper, published in the journal Proceedings of the National Academy of Sciences, that boldly lays out the scope of the oceanic emergency and what urgently needs to be done.
Long-term memory may help elephants adapt to climate change
(08/11/2008) Long-term memory may be key to helping elephants survive future challenges, including climate change, reports a new study published in The Royal Society's Biology Letters.
Amphibians face mass extinction
(08/11/2008) Amphibians are in big trouble. At least one third of the world's 6,300 known species are threatened with extinction, while at least 200 species have gone extinct over the past 20 years. Worryingly the outbreak of a deadly fungal disease, chytridiomycosis, is spreading throughout the tropics leaving millions of victims. A new study, published in the early edition of the Proceedings of the National Academy of Sciences, warns that there is "little time to stave off a potential mass extinction" of frogs, salamanders, and caecilians.
Climate change to hurt Brazil's farm exports by 2020
(08/11/2008) Climate change could have a significant impact on thye value of Brazil's agricultural exports according to a study presented Monday at an agribusiness conference in Sao Paulo, reports the Financial Times.
Fossils grant new insight into the Antarctica's natural history
(08/07/2008) At one time an alpine lake was inhabited by mosses and diatoms; insects such as beetles and midges crawled among sparse ferns and various crustaceans lived amid the lake's calm waters. This tundra-like landscape was the last stand of life in Antarctica, and it existed up to 14 million years ago before suddenly vanishing.
Global warming increases "extreme" rain storms
(08/07/2008) Global warming is increasing the incidence of heavy rainfall at a rate greater than predicted by current climate models have predicted, reports a new study published in the journal Science. The findings suggest that storm damage from precipitation could worsen as greenhouse gas concentrations continue to rise.
Researchers evacuated due to polar bear trapped on land by melting sea ice
(08/07/2008) The Wildlife Conservation Society (WCS) evacuated five of its scientists from a remote camp in northern Alaska because of a new and unusual threat: a polar bear stuck on land due to climate change. Polar bears would normally be out on sea ice this time of year, but with recent warming the ice is miles from shore and bears are becoming increasingly trapped on land well away from their usual seal prey.
NASA study shows global warming will diminish rainfall in East Africa, worsening hunger
(08/06/2008) A new NASA-backed study has found a link between a warming Indian Ocean and reduced rainfall in eastern and southern Africa. The results suggest that rising sea temperatures could exacerbate food problems in some of the continent's most famine-prone regions.
New mapping system shows how detailed climate changes will affect species
(08/06/2008) A new computer simulation from the Nature Conservancy shows greater detail than ever before on how climate change will affect the world's biodiversity, according to an article in New Scientist. In worst case scenarios—using the example of Bengal tigers in Sundarbans mangrove forest—the article's author, Peter Aldhous, writes that some species will be forced into a "condemned cell", literally having no-where to go while their region becomes inhabitable.
Ocean acidification may hurt reproduction in marine life
(07/30/2008) Ocean acidification due to rising carbon dioxide levels in the atmosphere may be putting the reproductive capabilities of some marine species at risk, reports a new study published in Current Biology by Swedish and Australian scientists.
Adaptation to climate change will be difficult for Madagascar
(07/29/2008) Madagascar's high levels of endemism coupled with its extensive loss and degradation of ecosystems leave its species particularly vulnerable to climate change. A new paper evaluates these risks and sets forth conservation priorities to best maintain the ecological resilience of the island nation.
Climate change will increase the erosion of coral reefs
(07/28/2008) Coral reefs are particularly susceptible to climate change. Warming waters have been shown to bleach coral, killing off symbiotic algae that provide them with sustenance, and often leading to the death of the coral itself. Much attention has been placed on bleaching coral, but now scientists have discovered an additional danger to coral reefs in a warming world: erosion.
Coral susceptibility to bleaching due to small differences in symbiotic relationship
(07/22/2008) Coral reefs are now considered the second most threatened group of animals in the world, with nearly one-third of corals listed as endangered (amphibians retain the dubious honor of being number one). Although corals face many threats, the greatest is bleaching caused by warming oceans due to climate change. However, some coral populations are more susceptible to bleaching than others, even including corals of the same species. New research has uncovered that the reason lies in small differences in the symbiotic relationship between corals and their symbionts, small marine animals and protozoa. Such differences, however minuscule, have a huge impact on the likelihood of a coral's ability to survive warming oceans.
Moving species may be only way to save them from climate change
(07/17/2008) Desperate times call for desperate measures, according to a new paper in Science. conservation scientists from the US, the UK, and Australia are calling for the consideration of a highly controversial conservation technique: assisted migration. According to the policy piece, species would be relocated to sites "where they do not currently occur or have not been known to occur in recent history".
Forests cover 1/3 of U.S. but are responsible for 2/3 of its water supply
(07/16/2008) The single most important function of U.S. forests is their role in securing the country's freshwater supply at a time when water demand is surging but climate risks to forests are also increasing, say the authors of a new federal report released by the National Research Council.
Birds face higher risk of extinction than conventionally thought
(07/14/2008) Birds may face higher risk of extinction than conventionally thought, says a bird ecology and conservation expert from Stanford University. Dr. Cagan H. Sekercioglu, a senior research scientist at Stanford and head of the world's largest tropical bird radio tracking project, estimates that 15 percent of world's 10,000 bird species will go extinct or be committed to extinction by 2100 if necessary conservation measures are not taken. While birds are one of the least threatened of any major group of organisms, Sekercioglu believes that worst-case climate change, habitat loss, and other factors could conspire to double this proportion by the end of the century. As dire as this sounds, Sekercioglu says that many threatened birds are rarer than we think and nearly 80 percent of land birds predicted to go extinct from climate change are not currently considered threatened with extinction, suggesting that species loss may be far worse than previously imagined. At particular risk are marine species and specialists in mountain habitats.
Warming will trigger cycle of increased energy use, heat waves in California
(07/11/2008) As the 21st century progresses, major cities in heavily air-conditioned California can expect more frequent extreme-heat events caused by climate change.
1/3 of corals face extinction
(07/10/2008) Nearly one-third of reef-building corals are vulnerable to extinction, according to an assessment of 845 species of coral. Rising temperatures, increased incidence of disease, and human disturbance are driving the trend.
Pine beetles attack Canada, boosting GHG emissions
(07/10/2008) The mountain pine beetle, a small tree-devouring insect, has deforested an area of British Columbia the size of Louisiana — over 130,000 square kilometers. The 5 millimeter insect is a perfect tree-destroying machine. The beetles bore through the tree's bark to reach the phloem of the tree, which contains the tree's organic nutrients. The beetles then feed on these nutrients and lay their eggs. The trees defend themselves by secreting extra resin, but the beetles are often able to combat this by releasing a blue fungi. In about two weeks time, the tree turns a tell-tale red and essentially starves to death. The mountain pine beetles move on.
Good news for reefs: giant coral structure found off Brazil
(07/07/2008) Amid a series of dire reports on the status of coral reefs, scientists announced the discovery of a reef off the southern coast of Brazil's Bahia state that doubles the size of the Southern Atlantic Ocean's largest and richest reef system, the Abrolhos Bank.
U.S. coral reefs in trouble
(07/07/2008) Nearly half of U.S. coral reefs are in "poor" or "fair" condition according to a new study by the National Oceanic and Atmospheric Administration (NOAA).
Some grasslands resilient against climate change, according to 13 year study
(07/07/2008) In Buxton, England--a spa town lying in the county of Derbyshire--scientists have spent 13 years subjecting grasslands to temperature increases and precipitation shifts consistent with climate change predictions. Considered one of the longest studies of climate change on natural ecosystems, the grasslands of Buxton proved surprisingly resilient to most of the effects of climate change.
CO2 emissions could doom fishing industry
(07/03/2008) Aside from warming climate, rising carbon dioxide emissions are contributing to ocean acidification, threatening sea live, warn researchers writing in the journal Science. This trend makes it all the more important to reduce emissions, argue the authors.
Global warming causes plants to move to higher elevations
(06/26/2008) Global warming has caused many plant species to move to higher elevations, report researchers writing in the journal Science.
Lion die-offs in Africa linked to global warming
(06/26/2008) Scientists have linked climate shifts in East Africa to die-offs in lion populations in 1994 and 2001. The research is published in the open-access journal PLoS ONE.
Global warming threatens California's native plants
(06/24/2008) Two-thirds of California's native plants could suffer an 80 percent or more reduction in geographic range by the end of the century due to changing climate warns a study appearing tomorrow in the open-access journal PLoS ONE.
Rainforests face array of emerging threats
(06/15/2008) Tropical forests face a number of emerging threats said a leading biologist speaking at a scientific conference in Paramaribo, Suriname.
Unlocking the potential of forests to limit climate change
(06/12/2008) Understanding the complex interactions between forests and climate may "unlock the potential of forests to limit global climate change," argues a researcher writing in the journal Science.
New discoveries about past forest changes may help predict future ones in a changing climate
(06/12/2008) There is no better method to understand the future than to look to the past. Several new studies of the earth's glacial history are transforming the way scientists look at tree behvaior during extreme changes in climate. Scientists Remj Petit, Feng Sheng Hu, and Christopher Dick described such changes in relation to current global warming in the new issue of the journal Science. They report that already "in some parts of the world, tree species have started to shift their distributions in response to anthropogenic climatic warming", thus raising the stakes for understanding how tree species will adapt to coming changes.
Forests face governance challenges
(06/12/2008) Governments "own" about 86 percent of the word's forests, but recent changes in forest management structure means they effectively control far less than they did just a generation ago. As such, the fate of forests is increasingly determined by concesssionary agreements with extractive industries and the whims of market demand for commodities produced on forest lands. Climate change and rapid economic growth are poised to further complicate effective management of forest areas.
Sea ice loss may triple warming over northern Alaska, Canada, and Russia
(06/11/2008) Fast-declining Arctic sea-ice could spur rapid warming in northern Alaska, Canada, and Russia triggering thawing of permafrost and a release greenhouse gases from the frozen soils, reports a new study published in Geophysical Research Letters.
Rainforest species particularly vulnerable to global warming
(06/08/2008) Tropical species may be particularly vulnerable to global warming due to their limited ability to adjust to high temperatures, warn scientists writing in the journal Science.
Diversity in streams may brace Chinook salmon for climate change
(06/03/2008) Chinook salmon face a one-two punch. They have disappeared from several rivers in the western U.S. largely because of human interventions and some populations are threatened or endangered. Numbers of Chinook in California's Central Valley have dwindled by 88 percent in the past five years, a loss that closed fisheries for 2008 and may cost California's economy $167 million, according to the state Department of Fish and Game. On top of all this looms a second impact: These salmon will be in hotter water still because of climate change.
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