permafrost

Permafrost is basically dirt that's been permanently frozen for hundreds or thousands of years, much of it since the last ice age.

How much methane and carbon dioxide might be released from the rotting permafrost?

"There's quite a bit of truth in it, " Julian Murton, member of the International Permafrost Association, told Reuters.

What was unusual about this was that Torrington had been dead for 138 years, buried under 1. 8 meters of Arctic permafrost.

As a high-effective heat conduction set, thermal probe can be used for enhanced thermal stability of building basement in permafrost .

Vegetation coverage directly involved in and influences the active layer of permafrost alpine hydrological cycle and its evolution trend.

"The permafrost, the constantly frozen layer of earth that protected them up until now, is melting, " he said.

The polar ice caps are made of frozen water and carbon dioxide, and water may be frozen in the ground as permafrost.

A recent study suggests, however, that permafrost ices below the surface of Mars may have altered the effects of impact on it.

In permafrost areas in the Soviet Union or Canada or Alaska, ice has been used effectively for walling and roofing.

This correlates well with the doubling of permafrost temperature and a decrease in the stability of the tundra surface in the region.

The presence of sea ice and of permafrost helps protect Arctic barrier islands for much of the year.

The sediments would release a lot of nutrients normally locked up in permafrost into freshwater cycles.

Different explanations have been offered for these fluxes, including emissions from fires, wetlands, melting permafrost, and plants.

The permafrost contains immense amounts of frozen organic matter that have been accumulating for millennia.

Block stones were used to protect permafrost from thawing by air convection effect in the embankment of Qinghai-Tibet Railway.

Vast reaches of the planet have been locked for millennia in stunning permafrost formations. But perhaps not permanently.

It also can be released directly as stored methane already in the permafrost is released as it thaws.

trees and soils, methane could be coming out of the permafrost in Siberia.

They've survived for millennia in desert, in the permafrost, at the tops of mountains and at the bottom of the ocean.

Research into the whereabouts of the missing water points to the probability that permafrost underneath the lakes thawed out.

Their growth will likely counterbalance some of the increased emissions from melting permafrost.

The Storflaket permafrost plateau bog near Abisko in northern Sweden shows cracks at its borders due to thawing of the permafrost.

is developing cracks in its concrete structures while its permafrost foundation is sinking and cracking, state press said yesterday.

As mentioned above, there is no reliable technology for the field observation of the unfrozen water in permafrost.

Microbes in permafrost have successfully adapted to cryogenic stress in morphologic, physiological and biochemical levels.

An exposed wall of ice-rich permafrost dwarfs a researcher along the coast of Herschel Island in the Yukon Territory of Canada.

Warming temperatures may also help uncover archaeological evidence buried under permafrost.

The methane and carbon dioxide levels will increase as a result of permafrost degradation.

And the reliability of foundation in permafrost regions is susceptible to temperature, which shall be taken into account in design.

Reasearch into the whereabouts of the missing water points to the probability that permafrost underneath the lakes thawed out.

Natural gas hydrate, which deposits on the ocean floor or in permafrost regions in vast quantities, is a potential future energy resource.

The Yellow River source is situated in the hinterland of Qinghai-Tibet Plateau, belonging to middle latitude mountainous permafrost zone.

"But other countries try to avoid building cities on permafrost, " the scientist says.

The continuing retreat of glaciers, permafrost and sea ice is expected, with the Arctic region being particularly affected.

Permafrost in the Altai Mountains in central Asia, sea ice in Alaska and glaciers in the Rocky Mountains were studied for the research.

Methane is released when organic material in the thawing permafrost decomposes, which gradually releases methane.

Underneath the permafrost are stores of methane, the same as the natural gas people use for cooking and heating.

The coarse-grained soil as embankment fill can meet the basic condition of heat transfer theory to uplift artificial permafrost table.

To solve the technique problem of wet jet concrete in permafrost tunnel construction, composite fast concreting medicament is developed.

The mutual interaction of mechanism permafrost, wetland and forests should be observed and surveyed for a long time.

Recently, interferences of infrastructures and pollutants from oil pipeline have affected permafrost and organisms' dwelling.

Hence, this paper adopt the temperature-unfrozen water function to calculate the unfrozen water content in permafrost.

Thus a general designing principle and methods of the roadbed in permafrost regions were suggested.

Permafrost: This talent will now correctly increase the movement slowing effect of frost Armor instead of the attack speed slowing effect.

Despite its northern location far above the Arctic circle, permafrost has started to thaw around Kaktovik.

Once permafrost fails, there is no engineering solution to correct that situation.

The climate change and the intensifying human activity cause the permafrost degradation in Northeast China.

As the permafrost thaws , it could lead to large-scale emissions of methane or carbon dioxide beyond those produced by fossil fuels.

High temperature on permafrost berm could deteriorate the degeneration of the frozen soil under the embankment.

Guodong explains that the construction impact posed a greater threat to the plateau permafrost than global warming.

Researchers say the discovery could help predict the fate of the deep Arctic permafrost.

"These permafrost deposits are now melting and releasing their methane, " said Maslin.

We're seeing rising interest in pretty inaccessible oil fields from Brazil to the Siberian permafrost.

The seismic responses of site will be influenced to certain extension when seasonal frozen soil and permafrost exist.

Permafrost warms up, and infrastructure built on it founders.

Yakutia is a region in the north-eastern corner of Siberia, where a belt of permafrost contains the mammoth-era soil.

Melting permafrost will hit existing and planned infrastructure.

Mountain glaciers have shrunk, snow cover has decreased in some areas, and areas of permafrost have been thawing.

Not backfilling silt, corruption and graft, permafrost soil organic matter.

Cover Story: Gas hydrate from Qilian Mountain Permafrost, Qinghai Province.

then put forwards the measures of reducing thermal deformation of pipeline in permafrost zone.

The vegetation is the key factor to protect the ecosystem balance in permafrost region of Tibet plateau.

Permafrost is defined as any ground that has stayed below freezing for more that two consecutive summers.

Most permafrost along the Qinghai-Tibet railway belongs to the warm permafrost category, and nearly half of which is ice rich permafrost.

The embankment with open crushed-stone side-slope is a main measure to cool the permafrost under the embankment of Qinghai-Tibet Railway.

The ice in permafrost provides an important physical structure for the frozen soil.

Most lakes in the region form when water fills the depressions left after the ubiquitous permafrost layer melts.

These findings are worrisome because about half the world's soil carbon is locked in northern permafrost and peatland soils.

Canadian researchers expressed serious concerns about the erosion of permafrost in the Arctic.

While landslides can occur naturally, scientists say there is unmistakable evidence that Yamal's ancient permafrost is melting.

The Phoenix's 90-day mission is to analyze the soils and permafrost of Mars' arctic tundra for signs of past or present life.

The Phoenix's 90-day mission is to analyse the soils and permafrost of Mars' arctic tundra for signs of past or present life.

which low the thaw sensitivity of permafrost in the seasonal thaw layer about permafrost table.

The feasible measures to prevent bridge disease and the methods of disease treatment in plateau permafrost regions are summarized.

Qumalaibuliangquan Road is in permafrost regions of Tibet Plateau, whose geological condition is very poor.

Much of the basin is made up of permafrost, a layer of frozen soil in Earth's polar regions.

Other positive climate feedbacks that operate in the Arctic include the thawing of permafrost and vegetation changes.

Not in the center. It is full of lakes, rivers and low vegetation resting on permafrost.

Ice will vanish from Arctic summers and some mountain tops, permafrost will become impermanent, sea levels will keep rising.

Because of the permafrost there are no any springs and wells here, so the locals have to saw the "drinking water" out of small rivers.

As a result, 82 per cent of the plateau's glaciers have retreated while ten per cent of its permafrost has degraded.

In permafrost region, the key about the stability of earth structure is itself thermal stability.

And what they found, by doing research into the permafrost, was this bacteria.

An example of a tipping point is the thawing of the permafrost.

Engineering damages of embankment in permafrost regions are mainly caused by thaw settlement of permafrost .

So it is necessary to develop an instrument that fits to research warmer permafrost with higher ice content.

They were first found in permafrost in the 1960s and then, in the 1970s, on the slopes of continental shelves deep beneath the ocean floor.

Descending almost 500 feet under the permafrost, the entrance tunnel to the seed vault is designed to withstand bomb blasts and earthquakes.

The priority is to ascertain which kurgans still have a layer of permafrost below them and might therefore be saved.

Descending almost 500 feet under the permafrost, the entrance tunnel to the seed vault is designed to withstand bomb blasts and earthquakes.

The priority is to ascertain which kurgans still have a layer of permafrost below them and might therefore be saved.

In this world of economic permafrost, someone, somewhere, will have to accept losses.

thawing permafrost and the shortening of the snow season.

Methane Bubbling Up From Undersea Permafrost?

Permafrost melt and lack of glaciers will make landslides and debris to produce greatly increased.

During warming, the gas burped into the atmosphere from natural reservoirs, or "carbon sinks" , such as permafrost and the oceans.

That runaway effect, Scambos says, could quickly lead to a warmer climate along the Arctic perimeter and to the loss of Arctic permafrost.

the harder the material under the permafrost is , the larger the chamber charge required.

These ice-like deposits are found on the seabed and in the permafrost regions of Siberia and the far north.

These ice-like deposits are found on the seabed and in the permafrost regions of Siberia and the far north.

A tuft of hair trapped in permafrost around 4, 000 years ago has yielded DNA for the first sequence of an ancient human genome.

If the permafrost melts, the methane released.

Will all the methane in the permafrost be released?

As permafrost gets warmer, it could become wetlands.

People know little about warmer permafrost with higher ice content, because of the limit of test instrument.

Every 20 centimeters in permafrost will gradually melting speed.

Thrawing frozen ground is the key to alluvial gold mining in Permafrost horizon.

They also sit on permafrost, which isn't "perma" anymore.

Methane gas is trapped in the permafrost in the frozen North.

Methane gas is trapped in the permafrost in the frozen North.

But the main exhibit is the completely preserved in a piece of permafrost mammoth, which was found in 1999.

It is high altitude, cold and much permafrost area along Xin-Zang highway (219 national highway).

"Permafrost areas hold 500 billion tons of carbon, which can fast turn into greenhouse gases, " Zimov added.

In summer, bearing capacity of pile decreased by 8% or so in permafrost active layer thawing. 4.

so it is very important for the construction of substation how to design grounding system in arctic-alpine permafrost area.

When scientists fly into remote areas of Siberia to study permafrost, they gaze down on an endless expanse of arctic lakes.

Fieldwork has been done in order to learn how the land surface change influences the thermal regime in permafrost regions.

This is a particularly important issue now because the Arctic is getting warmer, which poses a great threat to permafrost in the region.

I return star visitor outside the meeting invitation arrive our the Earth come, with permafrost children hold hands, is a friend.

I return star visitor outside the meeting invitation arrive our the Earth come, with permafrost children hold hands, is a friend.

It is estimated that some 50 billion tons of CH4 could be trapped in the Siberian Lake permafrost.

On the beach there is a jagged layer of thawing permafrost.

They think that rotating speed with the permafrost can't throw so big piece of thing to go out.

The destabilizing effects of melting permafrost at high altitudes, for example on mountains, could even cause rockslides and mud slides.

The Himalayan cryosphere such as glaciers and permafrost is very important in water circulation in the area.

Throughout the winter, warm, such as dormant Maemi, Yaran in the permafrost of the groove back.

This not only impacts carbon storage, but also will accelerate permafrost loss and changes in forest cover.

There is 5, 000 miles of railway track built on permafrost.

this is related to permafrost.

Last week marked the start of a US$5 million project to study the effects of thawing permafrost on ecosystems in the Arctic.

Temporal and spatial changes of permafrost in Canada since the end of the Little Ice Age

Preliminary Study of the Hydrological Processes in the Alpine Meadow and Permafrost Regions at the Headwaters of Heihe River

Scientists digging down in the permafrost --

Computer Simulation and Mapping of the Regional Distribution of Permafrost along the Qinghai-Xizang Highway

Numerical analysis for formation time of bearing capacity of cast-in-place concrete pile in permafrost regions of Mohe County

Study of ground temperature field during pile foundation construction in permafrost regions

Cooling effectiveness analysis of the vent-pipe, cast-detritus and heat preservation material on protecting embankment in permafrost regions

Study of the Structure Construction Technique Under Permafrost

Study of Ground Temperature Field while Construction of Precast Installed Culvert in Warm Permafrost

Study of the Temperature Field of the Surrounding Rock during the Tunnel Construction in Permafrost Regions

Variation of the Ground Temperature Field in Permafrost Regions along the Qinghai-Tibetan Railway

Effects of human engineering activities on permafrost active layer and its environment in northern Qinghai-Tibetan plateau

Theoretical Grain Size Distribution of Permafrost Soils as a Generalized Consequence of Hypergene Processes

Interaction between Qinghai-Tibetan Railroad and permafrost and its environmental effect

Thermosiphon Pile Technology and Its Application in Solving Permafrost Stability Problem

Observation and Analysis of a New Type Embankment-Bridge Transition Section in Permafrost Regions

Characteristics and Hazards of Permafrost along the Xinjiang-Tibetan Highway, Xinjiang

Mean Annual Ground Temperature Distribution on the Tibetan Plateau: Permafrost Distribution Mapping and Further Application

Temperature Field Features in the Laboratory Experiment of the Ventilated Railway Embankment in Permafrost Regions

Distribution and Degradation of Permafrost in Xiao Hinggan Mountains along the Heihe-Dalian Highway

Mechanism analysis and construction technology of thermosiphon-based protection for railway bed through permafrost region

Nonlinear Analysis of the Influence of Pavement types on Embankment Thermal Regime in Permafrost Regions on the Tibetan Plateau

The Situ Measurement to the Mechanical Parameters of Roadbed Soil in Permafrost and Analysis of the Deformation Modulus

Circumstances controlling technology of high altitude tunnel during construction in permafrost regions

Distributing Regularities of Subgrade Diseases in Permafrost Section of the Qinghai-Tibetan Highway

Experimental Study on the Thermal Boundary Conditions and Temperature Fields of Duct-ventilated Embankment in Permafrost Regions

Constructing of the Communication Optical Cable Buried Directly in Permafrost Regions of the Tibetan Plateau

Experimental Investigation of the Bearing Capacity of Piles in Unfrozen Soil and High-Temperature Permafrost

A study of seismic displacement characteristic of roadbed on permafrost site

Numerical simulation of thermal state of EPS insulation roadbed in permafrost region

Slope sediment yield in arid lowland continuous permafrost environments, Canadian Arctic Archipelago

Study on Thermal Balance of Asphalt Pavement and Roadbed Stability in Permafrost Regions of the Qinghai-Tibetan Highway

Development law of compressive strength of concrete cast-in-place pile in the permafrost region

Numerical Simulation of Pile Foundation Conduction at Different Molding Temperature in Permafrost Regions

Experience and Revelation Learned from Foreign Pipeline Construction Projects in Permafrost Regions

Significance of Numerical Simulation Research on the Thermal Regime of the Subgrade in Permafrost Regions

Discussion on Relationship Between Temperature Fields of Tunneling in Permafrost Region and Fractional Wall Rock Falling

(Differential) Frost Heave and Thaw Settlement in the Engineering Design and Construction of Oil Pipelines in Permafrost Regions: A Review

Thermosyphon technology and its application in permafrost

Experimental Research on Distribution of the Temperature Field in Permafrost Soil Subgrade

Construction and Quality Control of Combined Bolting and Shotcrete Net for cutting Side Slope protection on Plateau Permafrost Soil Zone

Experimental study on thawing subsidence characters of permafrost under frost heaving and thawing circulation

Experiment on Ground Temperature Field and Deformation of Bridge-subgrade Transition Section in Permafrost Regions

Numerical Analysis of the Critical Height of Railway Embankment in Permafrost Regions of the Tibetan Plateau

The Main Factors Controlling the Temperature Field during Tunneling in Permafrost Regions

The practice and thought of the permafrost in highway construction at the xiaoxinanling district

Simulative analysis on heat stability of embankment in high temperature permafrost district of eastern Tibetan Plateau

Dissolved Organic Carbon in Upland Forested Watersheds Underlain by Continuous Permafrost in Central Siberia

Application of the Permafrost Table Temperature and Thermal Offset Forecast Model in the Tibetan Plateau

The State-of-the-Art and New Subjects of Highway Research in Permafrost Regions of China

Deformation Characteristics and Influential Factors of Subgrade in Permafrost Region

Influences of Insulating Berm on Ground Temperature Characteristics of Permafrost Subgrade

Microbial Communities in Permafrost of the Tibetan Plateau and Their Significance

Increasing river discharge in the Eurasian Arctic: Consideration of dams, permafrost thaw, and fires as potential agents of change

Analysis for additional stress in pavement due to thawing settlement of permafrost subgrade

Permafrost Environmental Problem in the Construction of the Qinghai-Tibetan Railway

Asymptotic Evaluation of Temperature in the Permafrost Active Layer with Time-Dependent Boundary Conditions

Response of Alpine Cold Ecosystem Biomass to Climate Changes in Permafrost Regions of the Tibetan Plateau

Analysis to the Application of Ventilating Embankment in Permafrost Regions Engineering

Pipeline Engineering Geology Route Selection in Permafrost Areas of the Northeast China

Experimental research of technology and timbering technique for plateau permafrost tunnel

An Exploratory Research over Decreasing Deformation of Embankment by Bar Reinforcement at Permafrost Zone

Comparison of the Cooling Effect of the Horizontal and Triangular Gravel Embankments in Permafrost Areas

Formation conditions of gas hydrates in permafrost of the Qilian Mountains, Northwest China

Analysis on the Difference of Thermal State between South Faced and North Faced Slope of Railway Embankment in Permafrost Regions

Status and Expectation on Effective Methods for Strengthening the Railway Embankment Base in Permafrost Area in Russia

Application of Thermal-insulation Treatment to Roadway Engineering in Permafrost Regions

Nitrogen loss from watersheds of interior Alaska underlain with discontinuous permafrost

A Review on Research into Ecological Environment Impacts of Engineering Construction in Permafrost Areas

Permafrost and Infrastructure in the Usa Basin (Northeast European Russia): Possible Impacts of Global Warming

Experimental Study on Cooling Effect of Air Convection Embankment with Crushed Rock Slope Protection in Permafrost Regions

Calculation of the Carrying Capacity of Cast-in-place Bored Pile During the Early Period of Refreezing in the Permafrost Area

An Approximate Solution to Thermal Regime of Permafrost Under a Thaw Lake Using Heat Balance Integral Method

Laboratory experiment study on the ballast and ventilated railway embankment in permafrost regions

Principles of Permafrost Exploding Technology and Selection of Equipment for Qingzang Railway

Analysis on Field Temperature of Permafrost Swamp Combined with Treatment Measures for Subgrade with Geogrid

Nonlinear Analysis of Influence of Embankment Height on Embankment Thermal Regime in Permafrost Regions

Experiment and Analysis of the Earth Pressure (Frost Heaving Forces) on L-Type Retaining Wall in Permafrost Regions

The Coupled Heat-Moisture Mathematic Model of Roadbed-Geological Body in The Permafrost Double Direction Freezing

Experimental Study on Settlement of Embankment over Permafrost along Qinghai-Tibetan Railway

Engineering Techniques for Bridge Works in Permafrost Regions of the Tibetan Plateau

Laboratory experiment study on the railway ventilated embankment in permafrost regions

Applying Geosynthetic to the Embankment Protection on Permafrost soil District

Embankment construction with ventilated ducts in permafrost region in Qinghai-Tibet Railway

Research on Application Technology for Corrugated Pipe Culvert in Plateau Region with Permafrost

Stochastic earthquake response analysis of bridge piers with pile foundation in the permafrost regions

Impact of Railway Culvert Construction on the Ground Temperature of Foundation Soil in Permafrost Regions

Discussion on Buried Seat of Thermal Insulation Material for Subgrade Engineering in Permafrost Soil Zone

Application of Geosynthetics for Treatment of Subgrade Troubles in Permafrost Regions

A Simulation Test of the Frost Resistance of Cement-Stabilized Gravel in Permafrost Regions

Numerical Simulation Analysis on Thickness Design of Drainage Pipe Thermal Layer at Permafrost Areas

Stability Analysis Methods for Evaluating Landslide of Thaw-slumping in Permafrost Regions

The Analysis of Moisture Migration Affection on Temperature Field in Permafrost Embankment

Stochastic earthquake response analysis of bridge piers in the permafrost regions of Qingzang railway

Influence of Climate Warming on Permafrost Table Studied with Different Models and Temperatures

Numerical analysis on mechanism of longitudinal crack occurred in subgrade in permafrost region

Experimental Study on the Cooling Process of Shading Board Put on an Embankment Slope in Permafrost Regions

Application of Ground Penetrating Radar to the Detection of Permafrost Engineering

Forming Mechanism of Embankment Longitudinal Cracks in Permafrost Regions

Researching and applying of construction technology of permafrost roadbed

Simple Explanation the Suitability of Cantilever Retaining Wall on Road Cutting for permafrost Soil Zone

Application of BP neural network on deformation prediction for permafrost embankment

Prediction of Subgrade Settlement in Permafrost Area Using Artificial Neural Network

Study on Application of Modified Bitumen to Pavement Construction in Plateau Region with Permafrost

Study on Slope Types and Stability of Typical Slopes in Permafrost Regions of the Tibetan Plateau

Frost Heaving Analysis of Corrugated Pipe Culvert without Foundation in Permafrost Region

Construction Technology for Permafrost Protection in Plateau

Principles of Thermal Insulation for Permafrost Preservation

On insert pile foundation construction technology for permafrost zone culverts

Study on stochastic earthquake characteristics of ground in permafrost regions

Progress and Significance of Studies on Microorganisms in Permafrost Sediments

Analysis for Impact of Unfrozen Water on the Numerical Simulation Results of Permafrost Thermal Regime

Application of Riprap Slope Protection to Roadway Engineering in Permafrost Regions

Application of Thermal Insulation Material in plateau Permafrost Soil Zone Subgrade

Causes, South Borderline and Subareas of Permafrost in Da Hinggan Mountains and Xiao Hinggan Mountains

Temperature Influence on Strength of Cement Stabilized Gravel Formed in Permafrost Areas

In-situ Experimental Study on Railway Culvert in Thaw and Permafrost Transition Regions of Tibetan Plateau

Deformation of Highway Roadbed in Permafrost Regions of the Tibetan Plateau

Assessment Model of Permafrost Thermal Stability underEngineering Activity