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Instead of «whirling thermometer» you probably refer to «sling psychrometer» consisting of a dry-bulb thermometer and a wet-bulb thermometer. Yet, different to a static wet-bulb thermometer shown in the question, the constant rotation of the two thermometers permits evaporation from the wet cloth around the web bulb thermometer to «pristine parts» of ...


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It looks like a geophysical method. But a wide variety of such methods have been applied to the Yamal crater by Olenchenko et al. (2015): The complex of geophysical survey techniques included electrical resistivity tomography (ERT), near-field transient electromagnetic sounding (Transient Electro Magnetic (TEM) sounding), magnetic survey, and radioactivity ...


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