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Melting in Biological News

LOHAFEX: An Indo-German iron fertilization experiment

... patch is considerably smaller than the impact of melting icebergs that may leave a swath of several ... fertilized by iron in settling dust and from melting icebergs. However, in contrast to the remote ... will have a similar impact on the ecosystem as melting icebergs and is large enough to counteract the ...

January-February GSA Bulletin media highlights

... as well as formation of groundwater from melting ice and dewatering of hydrous salts. Their ... these tonalites suggest that they formed from the melting of the volcano-sedimentary package. This old, ... shoshonitic rocks and their origin by melting underplated basalts: The Miocene of Limnos, ...

June GEOSPHERE media highlights

... lava is to attribute their origin to the rapid melting of large plumes derived from the Earth's deep ... melting, generating a chronological sequence of melting events consistent with the stratigraphic record ... change through time. The tectonic environment of melting is similar to that of recent numerical models ...

December GEOLOGY and GSA TODAY media highlights

... of Rodinia; relationship between earthquakes and melting glaciers; monitoring Mt. Etna gas composition and ... generated approximately 825 million years ago by melting of an anomalously hot mantle source similar to ... northern Basin and Range Province, caused by melting of the Yellowstone ice cap and deglaciation of ...

Shape matters in the case of cobalt nanoparticles

... 10 nm diameters. You might expect the smaller objects to have a lower melting point, Hight Walker says. However, the sharp edges and corners in the ... could be the locations to initiate melting. While Walker says that the melting effect could be a potential method for fabricating nanostructures, it also ...

Spring agricultural fires have large impact on melting Arctic

... the black carbon or soot produced by the fires can lead to accelerated melting of snow and ice. Soot, which is produced through incomplete combustion ... and, when deposited on ice and snow, absorb solar energy and add to the melting process. In addition to soot, other short-lived pollutants include ...

Climate change threatens Lake Baikal's unique biota

... seal. Because the seals mate and give birth on the ice, premature melting of the ice forces them into the water before molting and drastically ... change, including greater nutrient inputs and industrial pollution from melting permafrost, may also exact a toll on an already-stressed ecosystem. The ...

Wetlands likely source of methane from ancient warming event

... An expansion of wetlands and not a large-scale melting of frozen methane deposits is the likely cause of a spike in atmospheric ... methane from entering the atmosphere. Scientists have estimated that a melting of only 10 percent of the world's clathrate deposits would create a ...

Lower increases in global temps could lead to greater impacts than previously thought, study finds

... occur, any of which may be accompanied by very large impacts, such as the melting of major ice sheets. There is now better understanding that the risk of additional contributions to sea level rise from melting of both the Greenland and possibly Antarctic ice sheets may be larger than ...

New technique for cancer screening

... tissues from colorectal cancer patients using quantitative high-resolution melting analysis," appears in the March 2009 issue of The Journal of Molecular ... tissues. Balic and colleagues examined the ability of high-resolution melting analysis (HRM) to detect methylation on archival tissues from colorectal ...

Dirty snow causes early runoff in Cascades, Rockies

... landed on. They found that changes to snow's brightness results in its melting weeks earlier in spring than with pristine snow. In addition, less ... year. Finally, they translated the brightness into snow accumulation and melting over time. Gray Outlook "Earlier studies didn't talk about snowpack ...

New life beneath sea and ice

... These lakes occur as a result of geothermal heat trapped by the thick ice, melting it from underneath, and the great pressure from the ice above, which lowers the melting point of water. The largest subglacial lake, Lake Vostok, lies beneath ...

Thawing permafrost likely to boost global warming

... carbon dioxide. The authors conclude that releases of the gas from melting permafrost could amount to roughly half those resulting from global ... considering complex processes that mix soil from different depths during melting and freezing of permafrost, which occur to some degree every year. They ...

Study: Future snowmelt in West twice as early as expected; threatens ecosystems and water reserves

... of earth and atmospheric sciences at Purdue, said the influence of melting snow on regional climate is far greater than that of increased greenhouse ... Physics in Trieste, Italy, and lead author on the paper, said the melting snow contributes to a feedback loop that accelerates warming. "Because ...

July 2008 GEOLOGY and GSA Today media highlights

... the crystallization age of the rocks, and confirming their derivation from melting of older crustal sources. This result suggests that in the Gunnison-Salida ... thermogenic hydrocarbon gases--had a higher temperature, which resulted in melting and cracking of the cover. Kotarba et al. performed geoelectric ...

Penguins exposed to DDT from melting glaciers

... the insecticide DDT, frozen stores of the chemical are now dripping out of melting Antarctic glaciers - and into penguins. A marine biologist in the US, who ... that other frozen pollutants may be released into the ecosystem from melting glaciers because of climate change. The low levels of DDT found in the ...

Arctic ice more vulnerable to sunny weather, new study shows

... indicate that summer sunshine in the Arctic produces more pronounced melting than in the past, largely because there is now less ice to reflect solar ... degrees Celsius). Warmer ocean waters can contribute to sea ice loss by melting the ice from the bottom, thereby thinning it and making it more ...

Arctic climate models playing key role in polar bear decision

... reductions in sea ice in coming decades. What's less certain is how much melting to expect and how quickly. Since each model represents climate in a slightly different way, the exact degree of melting - and timing of the first occurrence of an ice-free Arctic - vary ...

Tipping elements in the Earth's climate system

... white sea-ice so that the warming is amplified. This causes more rapid melting in summer and decreases ice formation in winter. Over the last 16 years ... high latitudes. If the inflow of freshwater increases, e.g. from rivers or melting glaciers, or the seawater is warmed, its density would decrease. A global ...

Peat and forests save permafrost from melting

... There is no doubt that northern regions are warming and permafrost is melting as shown by numerous observations and modeling studies, says Altaf Arain, ... Research Community Climate Model suggest that global warming is rapidly melting permafrost in the North regions. According to those studies, only a ...

Trans fats hinder multiple steps in blood flow regulation pathways

... are rigid, altering them can straighten or twist fat molecules into new configurations that give the fats their special qualities, such as the lower melting point of margarine that makes it creamy at room temperature. Kummerow, 94, has spent nearly six decades studying lipid biochemistry, and is a ...

University of Leicester geologists demonstrate extent of ancient ice age

... Page commented: "These fossil fuel-rich deposits formed during relatively warmer episodes during the Early Palaeozoic Icehouse when the partial melting of ice sheets brought about rapid sea level rise. This meltwater may have bought a massive influx of nutrients into the surface waters, allowing ...

Potential for non-invasive brain tumor treatment

... Ultrasonic Imaging . "The catheter would use ultrasound to first image the tumor, and then direct a higher-power beam to generate heat at the site, melting the liposome shells and releasing the chemotherapy directly to the tumor. "The temperature increase would be about four degrees Celsius enough to ...

Climate change could drive vast human migrations

... of farmland. Some Pacific island nations including the Maldives (pop. 300,000) are already considering prospects for total relocation. Ongoing melting of alpine glaciers in the Himalayas will devastate the heavily irrigated farmlands of Asia by increasing floods and decreasing long-term water ...

New book suggests Earth perhaps not such a benevolent mother after all

... effect that most climate scientists say will greatly increase temperatures around the world, with some severe consequences. For example, with the melting of mountain and polar ice sheets, the world's most-productive agricultural land will be submerged and humans will struggle to find food, Ward said. ...

Scientists urge global action to preserve water supplies for billions worldwide

... melting glaciers, weakening monsoon rains, less mountain snowpack and other effects of a warmer climate will lead to significant disruptions in the supply of ...

Scientists aim to bring indigenous people into climate change monitoring and policy

... are presented in the special issue. "Indigenous and traditional people are on the frontline of climate change, experiencing unprecedented heat, melting icecaps, droughts, floods and threatened natural resources," said Jan Salick, principal editor of the special volume and an ecological ethnobotanist ...

Indigenous peoples at world summit to share climate change observations, coping techniques

... adopted in Copenhagen. The Summit takes place in Anchorage, about 800 km east of the Alaskan village of Newtok, where intensifying river flow and melting permafrost are destroying homes and infrastructure, forcing 320 residents to relocate to a higher site 15 km west, at an expected financial cost in ...

Lohafex provides new insights on plankton ecology

... because previous, natural blooms had already extracted all the silicic acid (the raw material of diatom shells). Iron sources for natural blooms are melting icebergs or terrestrial input from streams or via dust blown off Patagonia. Hence a major finding was that other algal groups, although stimulated by ...

UK robot sub searches for signs of melting 60 km into an Antarctic ice shelf cavity

... the water, while creating a three-dimensional map that the scientists will use to determine where and how the warmth of the ocean waters drives melting of the glacier base. "There is still much work to be done on the processing of the data", said Adrian Jenkins, "but the picture we should get of ...

Rising sea levels set to have major impacts around the world

... is continuing to rise at 3 mm/yr or more since 1993, a rate well above the 20th century average. The oceans are continuing to warm and expand, the melting of mountain glacier has increased and the ice sheets of Greenland and Antarctica are also contributing to sea level rise." New insights reported ...

Survival in a Changing World: The Journal of Experimental Biology 2009 symposium

... of the climate system is unequivocal, as is now evident from observations of increases in global average air and ocean temperatures, widespread melting of snow and ice, and rising global average sea level'. These environmental changes have already significantly impacted the habitats and living ...

Arctic heats up more than other places

... unusual compared to events from previous thousands of years, especially considering that changes in Earth's orbit over this time have made sea-ice melting less, not more, likely. Sustained warming of at least a few degrees (more than approximately 4 to 13F above average 20th century values) is likely ...

Measuring water from space

... et Ocanographie Spatiale (LEGOS) in Toulouse, "but I do not think so. For several years now, the rate of rise has not changed significantly." melting ice fills the sea Cazenave's team, and other groups, calculate that for 1993-2003, about half of the sea level rise was due to the oceans ...

AGU journal highlights: Nov. 11, 2008

... al. study two parameters: ice discharge, which is obtained from remote sensing techniques; and surface mass balance, which is derived from a model of melting ice and snowpack accumulation. The authors find that surface mass balance and temporal variability in ice discharge are correlated for the time ...

Forced evolution: Can we mutate viruses to death?

... rates of viruses and push them beyond a threshold called a "phase transition." The thermodynamic analogy for this transition is the freezing or melting of water -- which amounts to a physical transition between water's liquid and solid phases. "Water goes from a liquid to a solid at zero degrees ...

What is really happening to the Greenland icecap?

... the first two very well and laid the ground for developing research proposals." While recent observations indicate that the Greenland ice cap is melting fast, it is uncertain how much this is contributing to sea levels, as co-convenor Carl Bggild, from UNIS in Svalbard explained. "A major challenge is ...

Global methane levels on the rise again

... least in part, due to methane releases in the high latitudes of the Northern Hemisphere. "Such increases have been predicted as rapid Arctic ice melting creates more high latitude wetland sources," says Dr Fraser. "A possible additional cause of the methane increase is that atmospheric oxidation ...

AGU journal highlights -- Oct. 16, 2008

... continental shelf by almost unmodified Circumpolar Deep Water (CDW); though cold, this deep water is several degrees above freezing and drives rapid melting of the floating terminus of the Pine Island Glacier. To learn more, Thoma et al. model ocean circulation in the Amundsen Sea. They find that influx ...

Diatom genome helps explain success in trapping excess carbon in oceans

... it, and the comparisons with the previously sequenced diatom genome of Thalassiosira pseudonana . "These organisms represent a veritable melting pot of traitsa hybrid of genetic mechanisms contributed by ancestral lineages of plants, animals, and bacteria, and optimized over the relatively ...
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