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News articles on Remote Sensing

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Mongabay.com news articles on remote sensing in blog format. Updated regularly.

Fire monitoring by satellite becomes key conservation tool
(3/26/2008) Remote sensing is increasingly used as a tool for conservation management. Beyond traditional satellite imagery popularized by Google Earth, new sensing applications are allowing researchers located anywhere in the world to track fires, illegal logging and mining, and deforestation in some of Earth's most isolated regions using a computer or handheld device. The Fire Alert System is one example of an application that is harnessing the power of satellites to deliver key data to conservation managers. Developed by Madagascar's ministry of Environment, the International Resources Group, Conservation International using data from the University of Maryland and NASA, the Fire Alert System enables near real-time monitoring of fires anywhere on the island of Madagascar, a hotspot of biological diversity. The system, which sends subscribers regular email alerts on newly-detected burning, will eventually be expanded to include all the world's protected areas, allowing managers to detect not only fires but potentially related activities like road building, logging, and even hunting.


Satellite could help reindeer in the Arctic
(3/17/2008) Researchers have used satellite data to detect Arctic conditions that cause mass starvation of hoofed animals depended on by native peoples. Some 20,000 musk oxen died on Canada's far-northern Banks Island because of such conditions during the winter several years ago. Yet, their deaths went unnoticed until the next spring. The new satellite-detection method could provide an early warning to native people, giving them a realistic chance of getting food to herds to prevent mass starvation.


Accurate forest data will help guide climate policy
(3/10/2008) As forests are increasingly seen as a means for fighting climate change, proper forest assessment becomes all the more important. The Food and Agriculture Organization of the U.N. (FAO) says it will call on member states to provide "accurate data". FAO data has been criticized by analysts for offering an incomplete picture of forest cover and trends.


'CAT scan' shows Hawaiian forests invaded by alien species
(3/3/2008) Invasive plant species are altering the ecology of Hawaiian rain forests, reports a study published in the Proceedings of the National Academy of Sciences (PNAS).


Complete map of world forests to help REDD carbon trading initiative
(2/27/2008) Policymakers, conservationists and scientists have high hopes that REDD, a mechanism for compensating countries for reducing emissions from deforestation and forest degradation, will spur a massive flow of funds to tropical countries, helping preserve rainforests and delivering economic benefits to impoverished rural communities. To date, one of the biggest hurdles for the initiative has been establishing a baseline for deforestation rates -- in order to compensate countries for "avoided deforestation" it first must be known how much forest the country has been losing on a historical basis. Until now, with some notable exceptions, this data was based largely on spotty satellite assessment and surveys of national forestry departments by the U.N. Food and Agricultural Organization.


NASA: warming is causing Greenland ice to melt faster than expected
(2/21/2008) 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.


Only 4% of the ocean is pristine according to first oceanic map of human-impact
(2/14/2008) There is a much used adage regarding the ocean that goes something like this: we know more about our solar system than our ocean. Whether or not one believes this to be true (less than 5% of the ocean has been explored), a group of over twenty researchers, by agglomerating the available information on the oceans, have created a large-scale image of the ocean's health.


NASA: Rain falls more often during the week than weekends
(2/4/2008) Storms in the southeastern United States generate more rainfall during the work week than on weekends, report NASA scientists. The pattern can be attributed to lower atmospheric pollution from humans on Fridays, Saturdays and Sundays. Atmospheric particulates have been linked to rainfall.


Is tropical deforestation really occurring?
(1/8/2008) New assessment suggests global deforestation data from the U.N. is deeply flawed and without better monitoring it is impossible to know whether net forest cover in the tropics is expanding or declining.


New satellite system will penetrate clouds to track deforestation
(12/5/2007) Satellite monitoring will play a critical role in any agreement that compensates tropical countries for preserving their forests, such as "Reduced Emissions from Deforestation and Degradation" (REDD) mechanisms currently under discussion at UN climate talks in Bali. Released Tuesday, a new study, "New Eyes in the Sky: Cloud-Free Tropical Forest Monitoring for REDD with the Japanese Advanced Land Observation Satellite (ALOS)", details significant advancements in the field of remote sensing of forests.


Historical records of Atlantic hurricanes are accurate says study
(11/28/2007) Counting tropical storms that occurred before the advent of aircraft and satellites relies on ships logs and hurricane landfalls, making many believe that the numbers of historic tropical storms in the Atlantic are seriously undercounted. However, a statistical model based on the climate factors that influence Atlantic tropical storm activity shows that the estimates currently used are only slightly below modeled numbers and indicate that the numbers of tropical storms in the recent past are increasing, according to researchers.


Carbon credits for forest conservation concept faces challenges
(11/27/2007) While environmentalists, scientists, development exports, and policymakers across the political spectrum are ethusiastic about the idea of offsetting carbon emissions by preventing deforestation (a concept known as "avoided deforestation" or Reduced Emissions from Deforestation and Degradation (REDD)), the concept still faces many challenges, especially in implementation.


NASA releases high-resolution map of Antarctica
(11/27/2007) A team of researchers from NASA, the U.S. Geological Survey, the National Science Foundation and the British Antarctic Survey today unveiled a high resolution, true-color map of Antarctica. The map is expected to help scientists better understand changes occurring on the icy continent.


Ground-breaking Amazon rainforest imagery will help monitor deforestation
(11/27/2007) Scientists have developed a ground-breaking high resolution snapshot of 400,000 square kilometers of Amazon rainforest. The work will help researchers remotely monitor deforestation, according to the Woods Hole Research Center (WHRC).


NASA: Arctic Ocean circulation reversal not due to global warming
(11/13/2007) A study published in Geophysical Research Letters shows that weakening of the Arctic Oscillation results from a cyclical process rather than climate change. The results suggest not all the large changes seen in Arctic climate in recent years are a result of long-term trends associated with global warming.


Madagascar fires mapped with Google Earth in real-time
(10/29/2007) Every year as much as one-third of Madagascar, one of the planet's most biodiverse islands, goes up in flames. Now a new tool gives scientists the ability to monitor and track Madagascar's fires in real-time through the Internet.


Google Earth adds endangered species info
(10/24/2007) Google Earth users can now learn about 100 of the world's most endangered species through a new KML developed by the Zoological Society of London's EDGE of Existence program.


Amazon rainforest burning "worst" in memory
(10/16/2007) Fires continue to rage in the Amazon, according to local reports. John Cain Carter, a rancher who runs Alianca da Terra, an environmental accountability group for agricultural operators, says that the fires are the worst he has ever seen in the region. "I have never seen fires this bad," he told mongabay.com. "The fires are even worse than in 1998's El Nino event." NASA satellite images released at the end of September confirm widespread burning in the Amazon state of Mato Grosso.


Land-clearing fires send smoke across Argentina, Paraguay
(9/11/2007) Thousands of fires likely set for land-clearing are sending thick smoke over southern South America, reports NASA.


Global warming to cause more severe thunderstorms, reports NASA
(8/31/2007) Global warming will increase the incidence of severe storms and tornados, report NASA scientists.


Peru's deforestation rate surged in 2005
(8/30/2007) Peru's deforestation rates surged in 2005, according to new analysis published in the journal Science.


NASA admits to error in global warming data
(8/17/2007) NASA has admitted to a data error that skewed temperatures since 2000.


Amazon deforestation in Brazil falls 29% for 2007
(8/13/2007) Deforestation in the Brazilian Amazon fell 29 percent for the 2006-2007 year, compared with the prior period. The loss of 3,863 square miles (10,010 square kilometers) of rainforest was the lowest since the Brazilian government started tracking deforestation on a yearly basis in 1988.


Failing water supply destroyed lost city of Angkor Wat
(8/13/2007) The ancient city of Angkor in Cambodia was larger in extent than previously thought and fed by a single water system, according to a new map published by an international team of researchers. The study, published in the early online edition of the journal Proceedings of the Natural Academy of Sciences, suggests that the urban settlement sustained an elaborate water management network extending over more than 1,0000 square kilometers.


Scientists: Newsweek Erred in Global Warming Coverage
(8/12/2007) A statement from the University of Alabama argues that a recent Newsweek cover story on climate change made two important mistakes.


Amazon deforestation rate falls to lowest on record
(8/10/2007) Deforestation rates in the Brazilian Amazon for the previous year were the lowest on record, according to preliminary figures released by INPE, Brazil's National Institute of Space Research.


Experts: parks effectively protect rainforest in Peru
(8/9/2007) High-resolution satellite monitoring of the Amazon rainforest in Peru shows that land-use and conservation policies have had a measurable impact on deforestation rates. The research is published in the August 9, 2007, on-line edition of Science Express.


Wild parrots tracked by satellite for the first time
(8/6/2007) Researchers are now tracking wild parrots from space.


Australia funds first global deforestation monitoring system
(7/23/2007) At a High Level Meeting on Forests and Climate being held in Sydney, Australia today announced a series of measures to slow deforestation and fight global warming.


Melting glaciers and ice cap will drive sea level rise
(7/19/2007) Melting glaciers and ice caps will contribute more to global sea level rise this century than the melting of the Greenland and Antarctic ice sheets, reports a study published in the current issue of Science.


NASA images show expansion of logging in Congo rainforest
(7/15/2007) New high resolution images of logging roads in the Congo region of Africa are helping researchers understand the expansion of industrial logging in Central Africa.


Poverty and corruption reduce effectiveness of rainforest parks
(7/9/2007) Poverty and corruption are linked to higher incidence of fire in tropical forest reserves, reports a new study published in the journal Ecological Applications. Poor, corrupt countries -- like Cambodia, Guatemala, Paraguay, and Sierra Leone -- have the least effective parks when measured in terms of the incidence of fire relative to surrounding "buffer" areas. The findings have significant implications for rainforest conservation efforts.


Rare and mysterious forests of Sulawesi 80% gone
(6/28/2007) Roughly 80 percent of Sulawesi's richest forests have been degraded and destroyed for agriculture, logging, and mining, reports a ground-breaking assessment of the Indonesian island's forests.


NASA monitors China's Three Gorges Dam
(6/13/2007) Some call it the eighth wonder of world. Others say it's the next Great Wall of China. Upon completion in 2009, the Three Gorges Dam along China's Yangtze River will be the world's largest hydroelectric power generator and one of the few man-made structures so enormous that it's actually visible to the naked eye from space. NASA's Landsat satellites have provided detailed, vivid views of the dam since construction began in 1994.


Google helps protect Amazon rainforest
(6/10/2007) Google is working with a indigenous tribe deep in the Amazon rainforest to protect their lands from illegal encroachment, reports the San Francisco Chronicle. For the first time, Google has confirmed details of the project. Working in conjuction with the Amazon Conservation Team, Google Earth's technology is being used to monitor illegal mining and logging that threaten the lands of the Surui tribe in Brazil. Google is working with satellite providers to significantly improve image resolution in some of the most remote parts of the Amazon basin.


Amazon deforestation rates fall 89% for 2007
(6/8/2007) Deforestation rates fell by 89 percent in the Brazilian Amazon state of Mato Grosso for April 2007 compared with April 2006, according to the System Alert for Deforestation, an innovative deforestation monitoring program backed from Brazilian NGO Imazon. Mato Grosso, which has suffered some of the highest rates of deforestation of any state in the Brazilian Amazon, lost 2,268 square kilometers of forest between August 2006 and April 2007, a decline of 62 percent from the year earlier period when 5,968 square kilometers were cleared.


Can cattle ranchers and soy farmers save the Amazon?
(6/6/2007) John Cain Carter, a Texas rancher who moved to the heart of the Amazon 11 years ago and founded what is perhaps the most innovative organization working in the Amazon, Alianca da Terra, believes the only way to save the Amazon is through the market. Carter says that by giving producers incentives to reduce their impact on the forest, the market can succeed where conservation efforts have failed. What is most remarkable about Alianca's system is that it has the potential to be applied to any commodity anywhere in the world. That means palm oil in Borneo could be certified just as easily as sugar cane in Brazil or sheep in New Zealand. By addressing the supply chain, tracing agricultural products back to the specific fields where they were produced, the system offers perhaps the best market-based solution to combating deforestation. Combining these approaches with large-scale land conservation and scientific research offers what may be the best hope for saving the Amazon.


Glaciers speed up due to global warming
(6/5/2007) Antarctic glaciers are moving faster due to global warming, reports the British Antarctic Survey.


Globalization could save the Amazon rainforest
(6/3/2007) The Amazon basin is home to the world's largest rainforest, an ecosystem that supports perhaps 30 percent of the world's terrestrial species, stores vast amounts of carbon, and exerts considerable influence on global weather patterns and climate. Few would dispute that it is one of the planet's most important landscapes. Despite its scale, the Amazon is also one of the fastest changing ecosystems, largely as a result of human activities, including deforestation, forest fires, and, increasingly, climate change. Few people understand these impacts better than Dr. Daniel Nepstad, one of the world's foremost experts on the Amazon rainforest. Now head of the Woods Hole Research Center's Amazon program in Belem, Brazil, Nepstad has spent more than 23 years in the Amazon, studying subjects ranging from forest fires and forest management policy to sustainable development. Nepstad says the Amazon is presently at a point unlike any he's ever seen, one where there are unparalleled risks and opportunities. While he's hopeful about some of the trends, he knows the Amazon faces difficult and immediate challenges.


California-sized area of snow melt spotted in Antarctica
(5/16/2007) NASA has found clear evidence of a California-sized area of snow melting in west Antarctica in January 2005 in response to warm temperatures.


Remote sensing tools used to predict bird species richness
(5/14/2007) Scientists at the Woods Hole Research Center, NASA Goddard Space Flight Center and the University of Maryland have taken a novel approach to studying biological diversity by making use of laser remote sensing (lidar). WHRC scientists examined the relationships between bird species richness and habitat metrics derived from lidar data acquired by aircraft. They then explored the efficacy of predicting bird richness and abundance based on these metrics.


Amazon rainforest locks up 11 years of CO2 emissions
(5/8/2007) The amount and distribution of above ground biomass (or the amount of carbon contained in vegetation) in the Amazon basin is largely unknown, making it difficult to estimate how much carbon dioxide is produced through deforestation and how much is sequestered through forest regrowth. To address this uncertainty, a team of scientists from Caltech, the Woods Hole Institute, and INPE (Brazil's space agency), have developed a new method to determine forest biomass using remote sensing and field plot measurements. The researchers say the work will help them better understand the role of Amazon rainforest in global climate change.


U.S. could offset 20% of emissions through reforestation of marginal lands
(5/3/2007) Reforesting marginal agricultural land could significantly slow the increase of carbon in the atmosphere reports a new study based on NASA data, though it would be no magic bullet in fighting global warming since temperate forests have been shown to increase regional temperatures by absorbing more sunlight. Still, reforestation has the potential to offer other ancillary benefits including watershed services and erosion control.


Bush seeks funding cuts for Earth monitoring satellites
(5/2/2007) The American Association for the Advancement of Science (AAAS) warned that environmental satellites responsible for monitoring Earth are endangered due to budget cuts and shifts in spending towards military and human space flight programs.


Madagascar' forests are recovering
(5/2/2007) Some of Madagascar's most biologically rich forests appear to be recovering according to research published in the open-access journal PLoS ONE. The study also offers new insight in the forces behind deforestation and the social context of reforestation efforts.


Jumbo squid and sperm whales tagged
(3/8/2007) Scientists have simulatenously tagged sperm whales and jumbo squid off Mexico's Pacific coast, allowing them to be tracked by satellite even as they dive to depths exceeding 3000 feet. Details of the effort are published in in the March 12 edition of the journal Marine Ecology Progress Series (MEPS).


2006 Indonesian forest fires worst since 1998
(3/1/2007) NASA has linked el Nino to the worst fires in Indonesia since the 1997-1998 conflagration that burned nearly 25 million acres (10 million hectares) of land across the country.


New maps reveal causes of Amazon deforestation
(1/26/2007) Brazil's National Statistics Office (IBGE) released a set of maps showing how farmers are converting the Amazon rainforest into cattle pasture and soybean farms. The maps show for the first time the impact of deforestation and agricultural expansion on the Amazon rainforest, according to the agency.


Satellite imagery to be used to detect illegal logging, determine sustainability
(12/21/2006) A new project aims to use advanced satellite imagery to monitor illegal logging activities and help certify the sustainability of timber harvesting in some of the world's most remote forests. The effort could reduce the cost of forest management and certification, while helping to crack down on illicit tree-felling.


African river basins are drying up says NASA
(12/13/2006) New satellite data from NASA show that the Mississippi and Colorado River basins are storing more water over the past five years, while the Congo, Zambezi and Nile basins are drying.



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