9,044 research outputs found
The air temperature conundrum
No full textMeasuring air temperature is far from a trivial task, as Andrea Merlone, Graziano Coppa and Chiara Musacchio explain
Thermal metrology for climate: a review of projects, activities and open issues
No full textOver the last decade, an increasing collaboration has been established between the metrology and the meteorology and climate communities. The International Committee for Weights and Measures and the World Meteorological Organization of the United Nations are jointly cooperating and driving the growing liaisons between national institutes of metrology and national meteorological and hydrological services. Thermal quantities play a key role among the Essential Climate Variables defined by the Global Climate Observing System in the terrestrial, atmospheric and marine domains. Improved understanding of ongoing and future climate variability and change through accurately monitoring temperature evolution requires metrological rigor to also enable early detection of trends. This is achieved through developing new measurement techniques and novel instruments; understanding uncertainty components both for laboratory calibration and for field conditions; accurately evaluating quantities of influence; and developing guidelines, best practices and recommendations. This paper reports an overview of the projects and activities involving the thermal metrology community under a growing collaboration with the researchers in climate and meteorology. A general vision on open issues and future perspectives is also presented
Rock temperature variability in the alpine cryosphere
No full textIn a context of cryosphere degradation caused by climate warming, rock temperature is one of the main driving factors of rockfalls that occur on high-elevation mountain slopes. In order to improve the knowledge of this critical relationship, it is necessary to increase measurement capability of rock temperature and its variability in different lithological and slope/aspect conditions, and also to increase local scale studies, increasing the quality and the comparability of the data. Rock temperature data, acquired from July 2018 to July 2022 in an alpine experimental glacial basin (https://deims.org/f8718e56-fb4d-49a3-92a9-3670e7f10ee9), in different two temperature monitoring sites (TMS) with the same lithological conditions (calc-schists) but in two different aspect conditions (South and North), at an elevation range from 2653 to 2667 m a.s.l, are present. The temperature data have been acquired by using six MadgeTech MicroTemp Data Logger (MT), metrologically referenced and with known measurement uncertainty (0.098 °C)
A New Mercury Gas-Controlled Heat Pipe for the Temperature Amplifier and as Calibration Facility
No full textPreface to the Special Issue of the 4th International Workshop on Progress in Determining the Boltzmann Constant
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