Questions tagged [field-measurements]
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Earth magnetic field, WMM/IGRF
My question is about World Magnetic (WMM) and International Geomagnetic Reference Field (IGRF) models. It is well known that to a first approximation, earth magnetic field is a field of dipole. It ...
Will a Mohs hardness scratch pen need to be replaced or resharpened?
I am considering buying a set of Mohs hardness scratch pens (aka hardness picks). As a hobbyist the price is quite high, starting at 300 USD and upwards for a complete set. I can accept this price if ...
Weather station data
I am currently setting up a wind-wave model for which I need to input the wind forcing for the whole domain. I have obtained the wind speed and direction from two sources: CFSv2 and ERA5. ...
Where can I find soil Free Swell Index values for the Cambridgeshire region, United Kingdom?
Where can I find Free Swell Index data for Clays for the Cambridgeshire region, United Kingdom? Surely this must have been performed at some point even though there are more sophisticated tests. I've ...
How to estimate evapotranspiration using moisture sensors?
There is a 210 cm long soil column that has five layers of different soil types. The topsoil layer of 15 cm has a moisture sensor in the middle. The second and third layers are of 95 and 80 cm of ...
How does a whirling hygrometer work, how does it differ from static dry/wet bulb thermometer, and how to obtain humidity from its readings?
Answers to my previous question How is relative humidity determined from a wet and dry bulb readings? provide equations for converting the two temperature measurements to a relative humidity. In ...
What instrumentation and/or measurement is likely being shown in this video of giant Siberian craters/sinkholes?
The RT video The Permafrost Mystery: scientists explore giant Yamal Sinkhole (with English subtitles) shows scientists exploring the formation. In one scene after about ...
What software libraries, tools or frameworks do you use for turning tabular sensor data from the field into cleaned data files
Cleaning data and turning it into a useable format that can be integrated with other datasets is a time-consuming task that earth scientists face when using sensor data. Most sensors output data in a ...
How do the pros measure humidity?
I have used a wet/dry bulb setup to estimate humidity, and it appears that the Argentinian meteorological service uses one in Antarctica as well. Wikipedia sez: Humidity measurement is among the ...
How is land subsidence measured?
When groundwater is pumped out of the ground by wells, and not replenished fast enough, the groundwater level sinks. With it, the surface of the area sinks also. Locally, this effect is not apparent,...
Why did "Glaciologist Princess Elsa" have to leave the glacier because it was too warm?
This tweet shows "Glaciologist Princess Elsa" is actually Caltech geophysics PhD student and cryoseismologist Celeste Labedz. The BBC News article What's a 'Science Princess' doing in an ice field in ...
Get NPK values of soil without spectroscopy
I stumbled upon this new device called Teralytic. Which can measure salination, NPK values and all sorts of things. Unfortunately it's sold out and I think when it'll be available again rather ...
Transmitter receiver coil separation for Electromagnetic Terrain Conductivity Measurement
Why increasing transmitter-receiver coil separation in EM survey (EM31, also here) increases depth of penetration? Suppose there is a horizontal flat conductive layer underneath a flat resistive ...
What was the lowest temperature ever recorded on the surface of Earth?
This article Lowest recorded temperatures lists a -89 Degrees Celsius in Vostok, Antartica as the lowest recorded temperature. However, this other article List of weather records lists a −93.2 °C (−...
Young researcher hoping to volunteer for Antarctica fieldwork
I am a postdoctoral scholar who is interested participating in Antarctica fieldwork/exploration as a volunteer. My background is in biology, but I am happy to participate in any fieldwork ...
How would steam refract light compared to fog and how would the rainbow appear? Does the temperature of the water drop or ice crystal effect the rainbow in any way? I know the size of the water drop ...
What was the highest temperature ever recorded on the surface of Earth?
The article entitled "54 Celsius degrees in Iran, the highest temperature ever recorded?" says 56,6 Celsius may be the highest temperature ever recorded, in Death Valley, California, and it also ...
Are there "transparent" clouds?
Comments below this answer to the question Why are lightning towers at launch pads topped with big hollow tubes with spiral windings and not “lightning rod-shaped” lightning rods? link to a 2013 ...
Is astrochronology a proper method?
Wikipedia's definition of astrochronology is: "Astrochronology is the dating of sedimentary units by calibration with astronomically tuned timescales, such as Milankovic cycles,1 or even ...
Where on Earth is the highest none polar magnetic fields?
Is there anywhere that magnetic ore deposits are strong enough to have a magnetic field that would be stronger then Earths' magnetic poles by proximity? I'm not asking Where on Earth is the ...
Where to find meteorological data from road stations?
I am involved on a project that aims to analyze data from road weather stations, like the ones you can see from a German site here: https://www.dwd.de/EN/ourservices/bufr_extensions_national/...
Where on Earth is the magnetic field intensity stronger?
Are there places on Earth that have a strong magnetic field other than the magnetic north and south poles? Can living where (rare) earth magnetic ore is abundant provide a mini-magnetoshere?
SEGD and SEGY recorded data
What is the difference between a segd recorded data and a segy recorded data and can we convert from segd to segy and vice versa?
How to make, read, and calibrate a ping-pong ball anemometer?
I'd like to make a ping-pong ball anemometer to make estimates or approximate measurements of wind and surface air currents at low to moderate speeds. I don't own an anemometer now, but I'd estimate ...
How are data from tiltmeters used to monitor volcanic activity?
I've just learned in this answer that tiltmeters (which I assume measure changes in tilt) are used near active volcanos. (Saw a mention in item 4. here also.) What kind of geological (volcanological?)...
Guidelines for locations of NTU markings on a turbidity tube
One way to estimate the turbidity of water while in the field is to use a turbidity tube. So far I've found two sources where I can get an idea of the locations of NTU markings along the tube. The ...