Questions related to Geoscience
(Technical issue, but can be useful for many of us).
For geosciences purpose, it is common to extract swath profiles from DEM in order to extract topographic and relief information. In the same logic, do you know if it could be easily done with vtk files in Paraview (with synthetic DEM)? It is obvious to extract data along a line and I would like to know if someone succeeded in doing it along a swath (with min, mean and max elevation data for instance)?
Thanks in advance for your answers,
All the best,
If the geodetic coordinates (φ,λ,h) of the ground station (e.g., GPS station) is known, how can the pressure, temperature, and relative humidity of this station be predicted at different times?. I'm looking for a mathematical model+modeling data, not instruments (equipment) used. If you have any information about this, please share it here.
"Participation of underrepresented minorities has long been an issue for science and engineering occupations, with participation rates well below that of whole population demographics as well as all occupational categories. Since 2007, the percentage of underrepresented minorities working in science and engineering occupations has ranged between 15% to 25% below that of whole population demographic trends with environmental science and geoscience occupations having the lowest participation rates."
except for the vitrinite reflectance, conodont and acritarch colour alteration, fission tracks, (U-Th)/He, is there any new methods to reconstruct the thermal history of sedimentary basins?
Hello everybody. I am a student at the end of my bachelor's degree in marine geology. I'm looking for proposals and suggestions for the end of the course work. In particular, I would be interested in geophysical methods (petrophysical, seismic,) and Coastal geology. That said, I evaluate proposals in all areas of Marine Geosciences.
The best geologist, they say, "is the one who has seen the most rocks". One begins to wonder the future of geological mapping in the state of rising insecurity in Nigeria. The pleasure and associated leisure of field studies/work is becoming life threatening largely because of the neglect of securing life and properties. Who will rise to the call and save our profession. On one hand, its as though, its the farmers that are most hit, on the other, look closely, geosciences is largely hit by this ugly development.... pls what are your thoughts
I am looking for case studies related to "sustainable mining" with a focus on water and environment protection. I am particularly interested in research about improving the water and waste management, potential resource recovery (circular economy), mitigating the environmental impact or reducing greenhouse gas emissions.
I am looking for a study suitable to present as a part of a course about Geoscience for sustainability - could you recommend me anything?
I have been looking for some paper related to solar radiation prediction or photovoltaic power generation from IEEE Geoscience and Remote Sensing Journals ( IEEE Transactions on Geoscience and Remote Sensing, IEEE Geoscience and Remote Sensing Magazine, and IEEE Geoscience and Remote Sensing Letters). If anyone can provide me it will be helpful for me.
We know that the estimation error (in percent) can be calculated with EEx = a*sqrt(var(x))*100/x, where EEx is the estimation error, a is a constant, var(x) is the variance (came from (co)kriging), and x is the estimated value by (co)kriging.
Considering an estimated value below 1%, the above equation may leads to large and meaningless estimation errors (thousands of percentages).
The question is that what should we do for estimated values less than 1%?
in the other side, we need to report the estimation error in percentages to classify mineral resources based on their estimation error.
p.s.: an example is Phosphorus grades at an iron ore mine. They vary between 0 and 1, but after performing (co)kriging, their estimation error ranges around 1500%.
Despite performing compositional data analysis (CoDa), this happens, more or less.
I have been working in the field of forest research for a decade and a half so far.
I have experienced different events during submitting manuscripts and revisions and I think the process of reviewing manuscripts isn't fair and is only in the favor of the editors.
Let me explain a real situation, I have submitted a manuscript in "Arabian Journal of Geoscience" ( https://www.springer.com/earth+sciences+and+geography/journal/12517) on 12 Mar 2019 and today it has been 196 days since I made the mistake and the status of the MS is still "pending for editor". I have sent several emails to the editor and the manager, but mostly I receive no response or the same email which I think is only copy and past of the same text.
Now, my student so far has lost half a year and I can't even withdraw the ms.
I even sent springer "contact us' ID explaining the problem, but still, nothing happened.
I am really getting more and more disappointed to see that the whole process is mostly a marketing job rather than a scientific responsibility or an ethical act.
What is your opinion about the recent hypothesis ?
Giant Underwater Craters May shed Light On Bermuda Triangle Mystery
We have been performing experiments in the laboratory for more than a year , and results are fascinating.
Would you please let me know if the following is accurate as an answer to the question:
Suppose we have sensors which measure the volumetric soil water content of a soil layer for a long period (more than 6 months) and also high temporal resolution (half-hourly). Could I assign the maximum in this dataset to the saturation point?
I understand that we do need to have a lengthy rainfall event, how long the event should be so that the above proposal works?
And if there is any other way that I can get to the saturation point of a soil layer from the volumetric soil water content data/sensors, please let me know.
Mostly focused on the topsoil and preferably only using the dataset.
It is generally believed in the geoscience world (with reference to published work) that, high intensity turbidity current and hyperpycnal flow have the ability to create deep cut or shallow cuts on the shelf breaks of continental margins. While some authors claim hyperpycnal flow to be the precursor of turbidity currents, others simply do not recognize the influence of hyperpycnal flow in turbidity currents initiation. Thus, the rising confusion of how best to differentiate the two flow processes.
Though, some may argue that hyperpycnal flow is mostly of coastal origin and turbidity current is perfectly influence by mass wasting induced by slides, slump and slope failures in the shallow marine environment; turbidity current is in fact not restricted to marine environments. These could create the thought of whether these two (turbidity current and hyperpycnal flow) processes are not the same and the genesis of the question: " what is the striking difference between high intensity turbidity current and hyperpycnal flow?".
With oil reaching historic lows, massive layoffs, a growing stigma against fossil fuels, new fields of science with a futuristic feel, retirement of legend professors from academia, lack of fundings, take over by climate change and global warming, supress the fundamental geology, hard working field based surveys etc. The ease of modeling lab work and software support in Geosciences snatch the heal of learning geology. It is understandable why studying the geosciences – particularly for careers in petroleum – might strike a student as a bad idea.
Share your review/opinion to uplift the descending trends in Earth Sciences.
I am looking for published (preferably open-access) articles on geoscience education with a focus on the geoscience curricula in basic education. Thank you!
I am using ocean bottom seismometer (OBS) data for ambient noise H/V with a target of nearly 5 Km. To consider the water layer effect, it is important to know the theoretical concept of P-wave contribution to ambient noise H/V peaks. The frequency range I use is 0.03 to 2 Hz.
What reference studies (Book, Article, Tesis etc) you know used ER Method was applied using the Vertical Electrical Survey (SEV) technique (Wenner-Schlumberger, dipole-dipole arrays) for definition of intrinsic vulnerability index to water contamination underground?
Are there any studies that have used this method to set parameters for analyzing groundwater vulnerability to contamination por geoelectric layers?
Maybe, the rejection was due to a lack of proper understanding of the content of the paper, by the reviewer(s) or the editor(s). Or, the editor claims your work is not suitable for the journal, when there are tens to hundreds of similar papers already published by the journal.
There are several scattered texts including papers on interdisciplinary areas of Geosciences for a particular river/ river system/ basin/ catchment. Need to know about a standard text book dealing with themes or interdiciplinary areas pertaining to themes stated in question? If so, May I request you to kindly state details about a comprehensive single text book about the same, with bibliographical details?
I supposed the answer is YES. Then, the question is how to improve the estimate of water availability by using remote sensing scheme. Here you are a new index for your considerations: NDLI as newly proposed in the prestigious journal IEEE TGRS: Liou, Y.-A.*, Mai Son Le, and Hwa Chien, 2019a: Normalized Difference Latent Heat Index for Remote Sensing of Land Surface Energy Fluxes, IEEE Transactions on Geoscience and Remote Sensing, 57(3), 1423 - 1433, doi: 10.1109/TGRS.2018.2866555.
Dear members of the Geophysics, Geoscience and seismology communities,
I am new in the areas of Geophysics and seismology; and I would like to get clear understanding of some technical concepts proper to these fields. Please, kindly spare few minutes of your time to answer this question so as to provide me with some tips to move on. Any suggestions would be greatly appreciated.
Thank you for your time
Question: Can a newly developed Normalized Difference Latent heat Index (NDLI) significantly advance the research fields, requiring land surface heat flux?
Background: Latent heat is the energy released or absorbed by a substance through phase change without changing its temperature. Its flux is a crucial element of the hydrological cycle at the land–air interface. Many water-related indexes have been proposed as indicators for latent heat flux extraction from satellite imagery, while the extraction accuracy still remains a space to improve nowadays.
Advancements: A new multiband index, called normalized difference latent heat index (NDLI), is proposed for remote sensing of land surface heat flux. The NDLI is found to be the most sensitive and reliable index outperforming the previously developed indexes to determine the characteristics of water content in different land cover types. It is concluded that NDLI can be used as a good indicator to represent the potential latent heat flux at the earth’s surface.
Citation: Liou, Y.-A.*, M.S. Le, and H. Chien, 2019 (March): Normalized Difference Latent Heat Index for Remote Sensing of Land Surface Energy Fluxes, IEEE Transactions on Geoscience and Remote Sensing, 57(3), 1423 - 1433, doi: 10.1109/TGRS.2018.2866555. (SCI, IF=4.662) (https://ieeexplore.ieee.org/document/8464042)
Numerical and experimental approaches on the behavior of salt caverns during storage of hydrogen and other gases
PhD opportunity at the École des Mines de Paris – Centre des Géosciences - Fontainebleau
The intermittency problem that usually characterizes renewable energy led to vast storage techniques in the last few decades. Hydrogen/energy storage in solution-mined caverns is one of the suggested solutions. In this context, a precise prediction of the cavern thermodynamic state is needed. Besides, such a thermodynamic response requires to be fully coupled with the thermo-hydro-mechanical behavior of the rock mass surrounding the cavern.
Most of the recent available researches with regard to gas storage in salt caverns depend on numerical tools that assume a uniform cavern thermodynamic state, thus they ignore the spatial variations of the cavern thermodynamic variables as well as the flow nature (laminar/turbulent). These numerical approaches allow for low cost and fast simulations, however, a question arises about their validity during fast circulation.
This proposed PhD thesis is dedicated to investigate the integrity of salt cavern mechanical and thermodynamic behavior during fast and slow cycling while addressing the entire complexity of the Computational Fluid Dynamics (CFD) problem, i.e. full discretization of the cavern, cavern gas velocity and thermodynamic variables spatial variations, nature of flow, and the 3D thermo-hydro-mechanical behavior of salt. Moreover, the problem of H2 storage in salt caverns is particular from other gases. This is attributed to the large mobility of hydrogen induced by its very small molecular length, and its potential reactivity with other chemical species that can be present in the storage environment. We aspire that this PhD thesis would shed a light on the phenomenon of hydrogen seepage into the salt rock during fast and slow cycling.
The centre of geosciences and the centre of thermodynamics and processes (CTP) of Mines ParisTech, associated with academic and industrial partners, are involved in a scientific research that includes the development of a laboratory model that is intended to be used to investigate the thermodynamic aspects of underground caverns during gas storage. This laboratory model will help understand the spatial distribution of the thermodynamic variables of caverns during fast and slow cycling. With properly controlling its boundary conditions, it is supposed to reproduce a similar thermodynamic response to real underground caverns. We wish to use this model to study other important phenomena that take place in caverns during cycling, i.e. the presence of water vapor due to brine evaporation, and hydrogen solubility in brine.
Interested applicants need to have good scientific backgrounds in thermodynamics and mechanics of solids. Numerical expertise in the finite element method is needed as well. Other skills may be learnt during the PhD course. Applicants who appreciate laboratory work are strongly recommended to apply. The outcome of this PhD work will be utilized in finalizing industrial projects, therefore chosen applicant will have direct contact with our industrial partners which will promote a certain future work in prestigious companies.
Interested applicants should send their CVs along with a brief motivation letter to Murad ABUAISHA:
There are many claims that the Arabian Peninsular used to be a green jungle. This article came to mind [Geology (2015) 43 (4): 295-298. https://doi.org/10.1130/G36401.1]
Actually the claims are two:
1. Arabia was meadows and rivers and
2. it will once again become meadows and rivers.
We have adequate scientific evidence to understand that first claim is indeed a fact scientifically. However, I do not know much scientific explanations about the last prediction.
The Question is How scientific is this claim(s)?
The aim is to publish e-journal of quality research. Need your consent to support the editorial board, peer-reviewer, web developer, etc.
I've decided to start a discussion, I'll be thankful if you can add something here or encourage any classmates, colleagues or researchers to share their knowledge as well.
Suppose someone aims to enter the realm of Spatial Data Analysis esp using Data Science and Quantitative Methods, how can you guide such a person to start his path? How long does it take for such a person to become a Spatial Data Scientists and Analyst.
Any ideas or experience will be helpful for everybody.
We would like to invite you to contribute with your original research articles, reviews, and technical notes to the Special Issue "Climate prediction of extreme events" in the journal Geosciences.
More information can be found at:
Deadline for manuscript submissions: 31 August 2019
We are looking forward to your valuable contribution,
Dr. Marco Turco
Dr. Sonia Jerez
I am working on stratigraphy and lithogeochemistry of a VMS-hosting sequence of Paleoproterozoic volcanic rocks and would like to plot drillcore samples that I collected into IoGas and Geoscience Analyst. I only have the collar location, drillhole orientation and sample depth, however both softwares require the ZYX coordinates to display the sample accurately. I know these calculation can easily be done with Gocad, Target or other 3D mining softwares, but I am wondering if there is another (cheaper) option where I could process small batch of data on a need basis. It does not have to be something that takes into account all the drillhole deviation, I am not looking for that kind of precision. Thank you.
"I am inviting you to submit interesting structural geological snaps and captions in the "Atlas of Structural Geology" (2nd Edition, Elsevier) that will be edited by me. Elsevier has approved this re-edition.
Open to take- natural secondary and primary, and also human-induced structures developed in all scales, acquired by any techniques.
To know the detail or to discuss, please drop me a mail at
1. Expression of interest: 30-Sept-2018
2. Submission of contributions: 30-January-2019
Dr. Soumyajit Mukherjee
Indian Institute of Technology Bombay, INDIA"
Dear all, what is your opinion in the question above? Do you think a scientist would have a better reputation when he is known for his punctual specialty or when he has a deep analytical capacity because of a great knowledge and convergent experiences?
any Geoscience topic that could help in applying EOR techniques
not an EOR topic
such as: something that could be helpful for using Low Salinity Waterflooding from the geologist point of view ?
or any other topic
The aim is to identify different types of emerging concepts in Geoscience that can have a direct or an indirect impact, or which can greatly contribute to meet the energy demand in the near future (say for a timespan of coming 2020-2035).
Any suggestions would be of great help to me for my project.
I am a third year geology student at the University of Edinburgh, School of GeoSciences. This summer I will be working on my dissertation mapping on the Ditrau massive. I have a mapping partner. I would appreciate information on the location of good exposures so I can spend more time on finding the lesser ones. I have seen a few good ones in scientific papers.
Springer Conference of Arabian Journal of Geosciences
12-15 November, Tunisia
5 Field Trips on 8-11 and 16-20 November 2018
20 Keynote Lectures
Submission deadline: 1 May 2018
Mark your calendar for the most comprehensive geosciences event particularly focused on understanding the geologic, geophysical, environmental and climatic evolution of the Arabian Peninsula, North Africa and Earth’s Arid and Semi-Arid areas. In general, the Conference Scientific Committee invites research papers on all cross-cutting themes of Earth sciences from all regions of the world, principally focusing on 10 major themes.
Does anyone know how frequently sand storms and dust storms that arise from middle east or north africa travel to Pakistan and North India? I was wondering, in view of the already worsening air pollution levels in North India, events such as dust and sand storms reaching the subcontinent may exacerbate the situation. How rare or common are such sand and dust storms being carried from their place of origin (usually middle east and north africa) and intermix with fog or haze intensified by smoke or other atmospheric pollutants in another far off location? Has there been any similar, possible mixing of phenomena (dust storm and smog) reported/documented/studied anywhere around the globe at any time, preferably that was also caught by polar or geostationary satellites?
I was looking at a true-color or natural color satellite image acquired on 29th Oct. 2017 by the Visible Infrared Imaging Radiometer Suite (VIIRS) on board the joint NASA/NOAA Suomi-National Polar orbiting Partnership (S-NPP) satellite around early afternoon. I've attached a screenshot of the image as well as provided the full link to access the satellite imagery. These satellite images have been stitched together to create a global mosaic. Unlike MODIS, VIIRS do not show any data gaps (except sun glints!). I found this satellite image particularly compelling because it clearly shows the sand storm picking up over northern Saudi Arabia and moving around Iraq, Iran, Caspian Sea towards Afghanistan with the movement of wind. I also think the Earth's rotation from west to east has a role to play in the movement and direction of the wind laden with sand and dust. But it seems difficult to understand their dynamics. The smog over North India and parts of Pakistan can be differentiated from the sand storm over middle east in this satellite image. In North India this is the time of the year when there are intentional crop fires due to the traditional slash-and-burn agriculture practice.
I find these spectra repeating in certain areas. I know it is a hydrocarbon, but I wanted to know if the spectra is a specific signature to a certain hydrocarbon. Literature survey suggests that the spectra belongs to beta-carotene. Does anyone know the significance of the same in rock samples?
Thank you in advance.
I have been facing some problems with the Raman imaging of natural rocks. At many locations of the rock (even polished rock samples) , the baseline shifts upwards drastically (suggestive of fluorescence) , totally engulfing the peaks of interest. I cannot use a higher wavelength because the spatial resolution of the CCD gets limited (upto 1800 cm-1), which means I have to do two scans to search for peaks in the other end of the spectrum. Moreover the intensity is too low . The rock is rough , which means using a 100 x objective makes me lose out on z resolution. But using a lower magnification causes a greater baseline shift. I have seen many images of rocks showing the different minerals in it clearly demarcated and I was wondering what I can do to the rocks to make the imaging better.
The Bermuda Triangle is one of the amazing landmarks in the world And there are strange, interesting and horrible events in that area. Events such as the crash of planes, the sinking of ships, the collapse of the compass, and etc. Scientists express different ideas for these events Like hexagonal clouds, deep earthquakes, atmospheric disturbances, methane gas and etc. And each of these reasons justifies part of the events in that area . What really happens in this area ? Could this be the cause of the extraterrestrials? Is there another area like the Bermuda Triangle?
Hello Respected Members,
I am master's research scholar in China University of Geosciences, Beijing. At this time, i am completing my course work. In my course work, i am studying Numerical Analysis, now i have needed to submit a report related to mathematical problem that we have faced during or research, my research direction in Remote Sensing Geology. Kindly suggest me same Research papers and Articles. Thanks
I need an experience Resercher/Prof. to work with at postdoc level either in the US, Canada, Australia and Europe in any aspect of Environmental Geoscience. I have about 3 months to conclude my doctoral research in environmental geochemistry
Dear colleagues (scientists, engineers and communicators),
in October (~3rd week), the Early Career Scientist representatives of the Natural Hazards division of European Geoscience Union (called NhET) will launch the EGU Natural Hazards blog online.
I will be the editor of the blog together with other scientists/friends that will equally contribute to the maintanance and development of the blog itself.
We plan to post online interviews and other elements that would open up natural hazard concepts to a very wide audience.
This is why I am writing here.
Would you be interested in being interviewed for the EGU blog? The topic needs to fit within Natural Hazards of course but as almost everything can fit in this profile, I would like to hear your ideas on the matter. How could you contribute? What topic are you familiar with and can we make the effort to discuss it keeping in mind a communicative purpose?
The NhET plans to release a post on a biweekly basis. This can be either a review of an important article (not authored by the interviewee) in a given branch of science or a discussion of the state of the art of a given scientific topic or technique.
The target length of the interview must be 500 < words < 1000.
Let me know your ideas and potential availability.
I have a set of disease cases in the polygon form as an attribute of each city. There are some 180 cities (polygons) that 2-5 of them recorded more than 300 cases, about 100 of them contain 0-2 cases and the rest recorded 2-20 disease cases. I'm going to evaluate the possible correlation between illness and some environmental factor such as temperature, precipitation, etc.
However, the distribution of the disease data is severely non-normal and violates many statistical methods' assumptions.
Do you have any suggestion in this case?
May i please know what does the term Quaternary signify in 'Quaternary Deposits' i would also like to know if it has similar meaning in case of 'Quaternary Landslides'.
I am looking for laboratory in Central Europe which posesses the Thermal Conductivity Scanner for some measurements in hard rock samples. I will be grateful for information about who has this kind of equipment.
This may help answer questions surrounding future discovery directions and technology required.
I've heard it said, 1M geophysical programs are required to find a greater than $100B totally blind subsurface mine. If so, is this lack of geophysical ore discovery success with current technology the issue or scarcity of large economic resources? Hope you include data that may help answer this question.
The former means much improved or new geophysical technology is required. Or will alternative new technologies and approaches to augment geophysics be required if scope of new geophysical technology needed is predicted to be limited?
The continental drift is a reality now, supported by the dynamics of plate tectonics and seafloor spreading. Continuous convergence (collision) and divergence (separation) of continental and oceanic plates from each other has been reshaping our Earth since the initiation of the process. Therefore, the absolute location (latitudinal and longitudinal) of places has been changing with the change of associated biotic and abiotic environments (tropics shift to equator, or polar regions being shifted to mid latitudes for example).
Then, how the shape of the earth arises due to the continuous movement of the continents and oceans is impacting the global climate? Does it also impact the paleoclimatic records which are being considered to understand the climate of the past?
I have downloaded images from Landsat MSS (1972) with the corresponding lot of stripe and noise ( MSS 4 jpg = band 4). Which is the best method for destripe with ENVI 5.0. I tried to destripe with « destripe tools » and « fill the gaps » in ENVI 5.0 , but I have had negative results.
So, I will appreciate if someone can help me with step by step (ENVI 5.0).
Global warming = Ice melting = Sea level rise = More water availability for evaporation and (possible) decrease of salinity = More evaporation = More clouds = Less solar radiation to earth = Global cooling = Fresh ice formation = Sea level fall = Less water availability for evaporation and (possible) increase of salinity = Less evaporation = Less atmospheric clouds = More incoming solar radiation = Global warming again.
(1) Are these consequences always true?
(2) If not, then what are the alternative circumstances?
(3) How does ever-changing Global Climate maintain its Dynamic Equilibrium with Global Water Cycle? Which one is the initiator of Change? Any evidence?
(4) Is there any long term record of salinity of oceanic water?
**Note: Above are the physical factors (components) for global change and associated consequences... excluding biological factors such as changes of concentration of Oxygen/Carbon-dioxide/Methane etc. and their inter-relation which also influence the global cycle.
UPDATE: Few Related & Interesting References (referred by the experts with their answers)
(IPCC Working Group Reports, referred by Harry ten Brink and Commenter)
https://nsidc.org/sites/nsidc.org/files/files/NRCabruptcc.pdf (referred by Alastair Bain McDonald)
https://www.newscientist.com/article/dn11462-climate-change-a-guide-for-the-perplexed (referred by Yuri Yegorov)
http://isthereglobalcooling.com/ (referred by Yuri Yegorov)
https://nsidc.org/cryosphere/sotc/ (referred by Yuri Yegorov)
https://en.wikipedia.org/wiki/Past_sea_level (referred by Yuri Yegorov)
http://www.antarcticglaciers.org/glaciers-and-climate/ (referred by Steingrimur Stefansson)
https://en.wikipedia.org/wiki/Greenhouse_gas (referred by Henrik Rasmus Andersen)
http://www.giss.nasa.gov/research/ (referred by Alastair Bain McDonald)
https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/education-outreach [Click Introduction to Paleoclimatology] (Commenter)
http://www.ncdc.noaa.gov/sotc/ [For Global and Regional Analysis of (1) Climate, (2) Hazards, (3) Snow & Ice, (4) Upper Air, and (5) ENSO events .....during late 1990s to till date] (Commenter)
...for refence see the Global Major Climate Events (originally source & compiled map credit NOAA-NCDC and WMO) during year 2012, 2013, 2014, 2015 and some images related to historical trend of global temperature (Images collected from various webpages referred here)...
The 1975 lexicon of Qatar states that the Cretaceous Mauddud Formation got its name from that locality near Dukhan.
The name was assigned by Dr. F.R.S. Henson in an unpublished 1940 report. Does anybody have that report?
A 1948 geological report on the Dukhan anticline by Dr. Max Chatton says "Ain Mauddud has a little water spring on the seashore". Does someone know where that water spring is/was?
Any help would be appreciated. This is related to my current research on the silica of the Rus Formation
Earth was definitely not heated to this state from a cold condition. It was cooled from a very high temperature and also very slow rate to this state.The question is what are the possible causes for this cooling?
A Geo-Scientist can answer this question