Permafrost - Science topic

Is there an index that integrates ground temperature, ground temperature change rate, active layer thickness, and active layer thickness change rate to comprehensively evaluate the thermal state and trend of permafrost over the years?

How to use matlab to model permafrost priority flow and predict permafrost degradation using the dual permeability model, lattice Boltzmann model or other numerical models of priority flow

The thawing of permafrost, which has been present for thousands and millions of years in areas near the Arctic Circle, mainly in the Arctic, caused by the accelerating process of global warming, will result in the release into the atmosphere of thousands and possibly millions of tonnes of hitherto frozen methane, a gas that is many times more greenhouse-generating than CO2, which will result in a significant acceleration of the already rapid process of global warming. However, this is not the only very dangerous effect for human civilisation and for the state of the planet's biosphere of the progressing process of global warming, a process which has been taking place since the first industrial revolution, i.e. since the 18th century. Among the significant negative consequences of the increasingly rapid global warming process triggered by the industrial revolution based on the dirty energy of burning fossil fuels is the increase in the risk of a future pandemic caused by viruses emerging from the thawing of the permafrost in areas near the planet's Arctic Circle. These viruses emerged and were frozen many thousands and perhaps millions of years ago, i.e. when there was not yet a modern species of homo sapiens on planet Earth. Therefore, humans may not be immune at all to these strains of different types of viruses that functioned on the planet many thousands of years ago. In addition, the existence of many species of both wild animals and farmed livestock may also be threatened if thawing viruses from many thousands of years ago prove to be completely unfamiliar to the immune systems of said animals. According to CNN media reports, there are virological research laboratories currently working on revived viruses taken from thawing permafrost. These revived viruses are referred to in the media as "zombie viruses". In addition, high summer temperatures have thawed the corpses of people who died and were buried in cemeteries many years ago, as well as animals, from whose thawing bodies pathogenic strains of viruses and bacteria have emerged. The thawing of the permafrost in recent years, for example, has been identified as a major source factor in the occurrence of the anthrax epidemic in Siberia, because the high temperatures experienced in Siberia for the first time in many thousands of years allow viruses and bacteria to be released from human cemeteries and animal corpses, i.e. micro-organisms that functioned thousands of years ago and which may be particularly dangerous to humans and animals living on the planet today.

In view of the above, I address the following question to the esteemed community of scientists and researchers:

What is your opinion on this subject?

Please respond,

I invite you all to discuss,

Thank you very much,

Best regards,

Dariusz Prokopowicz

Hello, collegues,

I'm trying to estimate the distribution of a certain kind of microorganism (eg Methanobacterium) in a certain environment (permafrost) from metagenomic data presented on various online services (NCBI, MG-RAST, https://microbeatlas.org). Such an analysis can be done on MG-RAST, but data are scarce. The service https://microbeatlas.org gives good data, but they do not correspond to the entire genus, but only to selected reference genomes. The situation is complicated by the fact that my computer is not very powerful and I cannot download 10,000 metagenomes and analyze them myself. Can you please tell me if it is possible to carry out such an analysis online, at least partially, with post-processing on a computer?

Dear colleagues and esteemed professors,

While searching global permafrost distribution I have come across several terms, which are synonymous and confusing.

It would be awesome to know the differences between; Permafrost Region, Permafrost Zone and Permafrost Area.

While going through the topic myself, I have come across some remarkable commentary (Obu, 2021) and articles (Zhang et al., 1999 and 2000; Gruber, 2012). Still, I would appreciate knowing the difference from the experts themselves.

This kind of bedform occurs in the Gulf of Mexico, Where the water depth varies from about 500m to 2000m, I'm not sure if there's methane or other gases in the ground here, or if there's a permafrost.

Dear colleagues,

I have a CT scan of a permafrost core. I assume that this core consists of air, ice, organic and mineral parts. I have threshold values for all constituents.

I need to build a 3D model and I want to define the threshold range for each constituent (i.e. let's say air's threshold values are from 0 to 80, ice from 81 to 150, organic from 151 to 190 and mineral from 191 to 255). I have several cores and threshold values are different for them.

On the screenshot, you can see the desired result.

It is possible to do it with Avizo but at the moment I don't have a license and it is quite expensive.

Is there any free alternative that I may use?

I already tried the ITK Python package and Huygens Professional and also several other programs but unfortunately, I did not reach my goal.

Update: another satisfying result can be four different images for each constituent respectively.

Thank you.

While I'm working on a project about landslides on the Tibet Plateau, I encountered many large and valley-filling deposits that seem to be some kind of mass movement but cannot find their source areas.

The phenomenon is usually observed at 4000 - 5000 m elevation and many areas have permafrost. I attached two screenshots to show one of them which dammed the river (the only one that dammed river in the region). Many other cases can be seen around this area in the google earth kmz file.

I was told it might be slow sliding caused by underlain ice melt or remaining glacier tills. Can someone who has working experience in high-elevation areas identify what kind of phenomenon is it?

Thanks in advance

Chenxiao Tang

What is the impact on lake ecology with permafrost thawing in Qinghai-Tibet Plateau ？

While working in the Subarctic of Western Siberia, we noticed that in places of active thermokarst the biological productivity of vegetation increases. Plants that are absent in nearby ecosystems with stable permafrost grow in thermokarst-affected ecosystems. Thermokarst is usually associated with human influence. What are the typical responses of productivity and biodiversity to the effects of thermokarst in your research area? Why does thermokarst increase vegetation productivity? Is this a thermal effect? Is this the effect of increasing soil fertility? Is this the effect of reducing competition from indigenous zonal flora? Or is it a complex of the listed reasons?

I am attaching a photograph of the community on the thermokarst slope and a photograph of a typical tundra (latitude N70 °).

I am trying to calculate the LST of three land types existing in permafrost regions of NWT, I am using Landsat-8.

Is the thermal imagery of Landsat-8 a good source for deriving LST of a local scale?

And,

I was wondering,

which time of year is the best time for this process?

There are many contaminated sites around the circumpolar Arctic, from DEW line sites to a variety of other historic hazardous waste, municipal waste, and mixed dumping sites. I am interested in any publications or data that could shed light on whether and how contaminated sites are changing as a result of permafrost thaw. Permafrost is often assumed to be an effective barrier to the spread of contamination from such sites, but thawing is likely to change this and may already be having effects on the containment of contaminants, particularly in coastal areas or other areas that are experiencing slumping or erosion. The effects may be highly site-specific but any information on particular sites or wider analysis of potential trends related to this question would be greatly appreciated. Thank you!

Hi all,

I'm looking for climate change projection data in raster format. Something like is shown in the IPCC 5th report chapter 12.

In particular I'm interested in the Arctic, temperature, precipitation and permafrost. I've had a look at the IPCC data centre and a couple of other online data portals, but without much joy.

Does anyone have any suggestions?

Cheers,

Matt

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I could not see that file become attached in previous question

Dear Researchers,

I would like to ask that between Water Flow and Balance Simulation Model (WaSiM) and Cold Regions Hydrological Model (CRHM) which is good model in permafrost hydrology prespectve. I have to choose anyone between these two models. I am confused and not yet finally decided.

Expert opinion is highly appriciated and valuable.

Thanks in anticipation.

Regards

Naveed.

Hello Everyone,

I want to use VIC model for permafrost regions to simulate runoff under changing climatic and vegetation cover. Any guide / information may be very supportive and helpful for me. So please share if you have any kind of support / guide /help etc.

Regards

Naveed

Hi,

Anybody used Variable Inflitration Capacity Model (VIC) Model?

I want to know that SWAT model can be used permaforst hydrology (focusing on surface water flow and ground water recharge) under changing climate and vegetation cover.

If yes, then what are the controling factors / parameters which shows the permafrost conditions in SWAT Model?

For my research work, I want to know which model is best for permaforst hydrology (focusing on surface water flow and ground water recharge) under changing climate and vegetation cover.

The conditions required for the formation of natural gas hydrates occur frequently on the Earth’s continental margins (apart from a smart fraction associated with the Artic Permafrost): - Is there any specific reason associated with these kind of occurrence?

I recently read an article about the melting of permafrost soils that have been frozen for thousands of years, and as they melt, they are releasing ancient viruses and bacteria that seem to be springing back to life. For example, in August 2016, in the Yamal Peninsula, a 12-year-old boy died and at least twenty people were hospitalized after being infected by anthrax. It was assumed that a reindeer infected with anthrax died 75 years ago and its frozen carcass became trapped under permafrost. Many other diseases are also found to have been released due of this, and they are multiplying. I am concerned about what great impact this could have on the human population, and if there are ways this could be controlled or prevented. 

I’m wondering if you know catchment hydrological models that simulate hydrological response of watersheds located in permafrost or freezing soil areas with taking into account the soil freezing and thawing dynamics ?

3 out of 4 extinction events were caused by a build-up of methane hydrates in the atmosphere.  We are seeing an increase of methane with the melting of permafrost.  With the continued increase of warming and the admission by climate scientists that the warming event is accelerating this should be a huge concern.

Class 1 hydrates are considered as the best type of hydrates compared to Class 2 and Class 3 hydrates as energy source. Above free gas section of Class 1 hydrate, hydrate section might contain hydrate+free water (Class 1W) or hydrate+free gas (Class 1G). According to the result of the modelling studies, Class 1G is preferred compared to Class 1W. My question is that in nature which type is common, whether Class 1G or Class 1W? I could not obtain any articles or reference about it. Just I know Messoyakha field (permafrost) in Russia is Class 1G type.

I want to date gas emitted from soil (permafrost) and determine where this carbon comes from (what depth).

From what I saw in the literature, the only way to do this is to do incubations and then link the results with the field values. 

Are there other ways?

I only know the paper of Boereboom et al. (2013) in The Cryosphere but I am sure there is more (unpublished?) data available.

Thanks

I am looking for alternative methods for the preservation of permafrost, especially in ice-rich discontinuous regions. I have reviewed the studies for woods chips, however, I am looking for results of different materials (i.e., geotextiles, vegetation mats, sod, etc.) or new technologies. I appreciate any direction or research that can will be cited.

Thanks!

Michelle

Papers, references, databases? Quaternary deposits of Beringia region (from Taymir to Alaska) are interest for me....

Current research suggests the possible existence of sporadic permafrost in relation to several buried ice patches of Picos de Europa, with mean annual temperatures close to 0ºC in the debris that cover these relict ice bodies. But so far it has not been demostrated to 100%.

For my study I have six different DEMs of a glacier. The DEMs are all from different years and I want to calculate the volume changes over a timeperiod. Including the six DEMs I have one subglacial DEM with low resolution (100 meter). In ArcMap, I use raster calculator to subtract the DEMs from the subglacial DEMs to get the volume results. The problem is that the DEMs with high resolution gets converted to 100 meter resolution. Is there any way to derive results with better resolution? 

I am working on a white paper for buried chilled pipelines in discontinuous permafrost. Topics that are covered are frost bulb, thermokarst, slope instability, thaw settlement, subsidence, permafrost disturbance in right-a-way, reclamation, and revegetation strategies. In addition, lessons learned and BPM for trenching methodologies. I appreciate any assistance!

Thanks!

I have had some luck with the USPTO database searching on "permafrost" but that will not lead, I think, to ship/boats/ etc. technologies.  I think what I really need is to know what the classification numbers might be.  Looked at the 2013 WIPO Indicators publication. I have not gone looking via the Intl Maritime Organization.

We are looking for convective heat transfer coefficient values to compare with our field experimental results

I'm looking for convective heat transfer coefficient that were derived from experiments involving heat advection by flowing water over ice or permafrost.

Unfrozen water effects.