How the loss of Indonesian mangrove forests is linked to climate change
August 10, 2015 07:29 AM - Prodita Sabarini, The Ecologist
The loss of Indonesia's coastal mangrove forests for shrimp farming is a huge source of carbon emissions, writes Prodita Sabarini. But equally, a policy flip to preserve and recreate mangroves offers a major climate win.
Mangroves are important because of their high rates of tree and plant growth, coupled with anaerobic, water-logged soils that slow decomposition, resulting in large, long-term carbon storage. Mangroves store three to five times more carbon than rainforest
Preventing the loss of Indonesian mangroves would help in the global fight against climate change, new research shows.
Sunspot variation not causing climate change
August 8, 2015 06:22 AM - INTERNATIONAL ASTRONOMICAL UNION via EurekAlert
The Maunder Minimum, between 1645 and 1715, when sunspots were scarce and the winters harsh, strongly suggests a link between solar activity and climate change. Until now there was a general consensus that solar activity has been trending upwards over the past 300 years (since the end of the Maunder Minimum), peaking in the late 20th century -- called the Modern Grand Maximum by some .
This trend has led some to conclude that the Sun has played a significant role in modern climate change. However, a discrepancy between two parallel series of sunspot number counts has been a contentious issue among scientists for some time.
Fish go deep to beat the heat
August 7, 2015 02:21 PM - James Cook University
A James Cook University study shows fish retreat to deeper water to escape the heat, a finding that throws light on what to expect if predictions of ocean warming come to pass.
Study shows some permafrost carbon transported by river to the ocean
August 6, 2015 07:15 AM - Woods Hole Oceanographic Institution
As temperatures rise, some of the organic carbon stored in Arctic permafrost meets an unexpected fate—burial at sea. As many as 2.2 million metric tons of organic carbon per year are swept along by a single river system into Arctic Ocean sediment, according to a new study an international team of researchers published today in Nature. This process locks away carbon dioxide (CO2) - a greenhouse gas - and helps stabilize the earth’s CO2 levels over time, and it may help scientists better predict how the natural carbon cycle will interplay with the surge of CO2 emissions due to human activities.
“The erosion of permafrost carbon is very significant,” says Woods Hole Oceanographic Institution (WHOI) Associate Scientist Valier Galy, a co-author of the study. “Over thousands of years, this process is locking CO2away from the atmosphere in a way that amounts to fairly large carbon stocks. If we can understand how this process works, we can predict how it will respond as the climate changes.”
How changing land use pattern in the Caribbean is impacting storm risks
August 5, 2015 07:22 AM - José Rodriguez-Llanes, Catholic University of Louvain, SciDevNet
Turning natural landscapes in the Caribbean into urban areas or farmland may increase the risk of people dying from floods and storms, scientists suggest.
In a study published by Scientific Reports last month (8 July), researchers from Anguilla’s health ministry and the Catholic University of Louvain in Belgium investigate which factors make the region more prone to deaths related to these disasters. Out of 20 variables, they found that using a greater proportion of land for agriculture and having a higher percentage of people living in urban areas were consistently linked with deadlier floods and storms.
Ice cores show volcanic eruptions and cold climate strongly linked
August 4, 2015 07:31 AM -
Researchers find new evidence that large eruptions were responsible for cold temperature extremes recorded since early Roman times
It is well known that large volcanic eruptions contribute to climate variability. However, quantifying these contributions has proven challenging due to inconsistencies in both historic atmospheric data observed in polar ice cores and corresponding temperature variations seen in climate indicators such as tree rings.
New study exposes negative effects of climate change on Antarctic fish
July 31, 2015 09:14 AM - Oxford University Press
Scientists at University of California Davis and San Francisco State University have discovered that the combination of elevated levels of carbon dioxide and an increase in ocean water temperature has a significant impact on survival and development of the Antarctic dragonfish (Gymnodraco acuticeps). The research article was published today in the journal Conservation Physiology.
UK Bog ecosystem threatened by climate change impacts
July 31, 2015 07:03 AM - University of Leeds.
An entire ecosystem is at risk from the effects of climate change on the UK’s blanket bogs, scientists at the University of Leeds have warned.
These wetland habitats provide important feeding and nesting grounds for bird species including the dunlin, red grouse and golden plover. Blanket bogs are also the source of most of our drinking water and vital carbon stores.
The scientists warn that the effects of climate change, such as altered rainfall patterns and summer droughts, could drastically affect bog hydrology, which in turn could affect insect and bird populations.
Forests take years to rebound from drought
July 30, 2015 04:38 PM - University of Utah
In the virtual worlds of climate modeling, forests and other vegetation are assumed to bounce back quickly from extreme drought. But that assumption is far off the mark, according to a new study of drought impacts at forest sites worldwide. Living trees took an average of two to four years to recover and resume normal growth rates after droughts ended, researchers report today in the journal Science.
Greenhouse Gas Emissions from US Corn Belt have been Underestimated
July 29, 2015 08:55 AM - University of Minnesota
Estimates of how much nitrous oxide, a significant greenhouse gas and stratospheric ozone-depleting substance, is being emitted in the central United States have been too low by as much as 40 percent, a new study led by University of Minnesota scientists shows.