The increase in the accuracy of the electric field measurement can significantly improve the quality of MT data. The paper deals with the peculiarities of the development of a new version of the instrument for the measurements of electric fields at MT – both electric field sensors and the electrometer. The results of experimental tests of the new sensors and the electrometer included as a unit in the long-period magnetotelluric station LEMI-420 are given.

The Sinji Vrh Geomagnetic Observatory is situated on Gora above Ajdovščina, a highland karst plateau, in the southwestern part of Slovenia, and operates in exceptional geological and meteorological conditions due to its location. The measurements intended to determine the value of influences of weather fronts on the local magnetic field were carried out in January 2013. This article presents the results of these measurements, showing how the snowstorm induced changes in earth's magnetic field.

A novel, airborne pod-based millimeter wavelength radar, which operates both on the NCAR Gulfstream V aircraft and as a ground-based sensor, opens up new observational opportunities for the research community. The radar’s millimeter wavelength, dual-polarization, Doppler remote sensing capabilities generate measurements that provide the most complete picture of cloud physics available to the atmospheric science community. It offers unique observations on the formation and evolution of clouds.

This paper examines how the resolution of small-scale geological density models is improved through the fusion of information provided by gravity measurements and density muon radiographies. The method is illustrated with examples for the La Soufrière volcano of Guadeloupe.

The remotely sensed drought severity index (DSI) records compiled by Mu et al. (2013) exhibit significant local trends in several geographic areas. Since the interpretation of DSI values and trends depend on several local factors, standard field significance tests cannot provide more reliable results than the presented local trend survey. The observed continent-wide trends might be related to a slow (decadal) mode of climate variability, a link to global climate change cannot be established.

The monitoring and measurement of water flow in groundwater wells allows us to understand how aquifers transmit water. In this paper we develop a simple method, which we call T-POT, that allows flows to be estimated by tracking the movement of a small parcel of warmed water. The parcel is tracked using fibre optic temperature sensing - a technology that allows detailed measurements of temperature, and therefore flow using the T-POT method, to be made in the well.

Ecosystem-scale manipulation experiments are getting more complicated and require innovative approaches that help manage high volumes of in situ observations. New large-scale, well-designed, and reliable data acquisition and management systems will become common it the future. The presented approach shows an example of such a system that was built in a remote and harsh environmental location. The provided details can be used for the design of similar systems for other experiments in future.