Volume of Abstracts - Università degli Studi di Milano

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5 th Int. Workshop on Ice Caves (IWIC – V) Barzio (LC), Valsassina, Grigna and Milano, September 16 – 23, 2012 Volume of Abstracts caused the surface contact lake to dry (but this is actually only an hypothesis, because it was not possible to observe directly none of the two facts). A COMPARISON OF TEMPERATURE DATA LOGGERS AND MEASURING SENSORS OF DIFFERENT PRICE LEVELS AND CONSTRUCTION TYPES TO TEST THEIR REACTION TIME, ACCURACY AND APPLICABILITY IN CAVE RESEARCH Böckler D. 1 , Pflitsch A 2 , Killing-Heinze M. 2 1 Ruhr-University Bochum, Department of Geography, Universitätsstr. 150, 44801 Bochum, Germany 2 Workgroup Cave & Subway Climatology, Department of Geography, Ruhr-University Bochum Universitätsstr. 150, 44801 Bochum, Germany For the continuous recording of temperatures at various points in an investigated area, as for instance inside a cave, the market offers a variety of measuring sensors of different price levels and accuracy. The number of automatically recording temperature sensors used in a measurement campaign is often limited by financial means and their acquisition often involves severe financial investments, so that often a compromise is made between quantity and quality of these measuring devices. Since, with regard to accuracy and construction type, the types of data loggers are a very similar to those used in foodstuffs control and the controlling of industrial plants, they must be compared to that type of data loggers, which are usually less expensive. Therefore, it will be examined whether or not the low-price data loggers can be used in measuring temperatures in the field of cave climatology. The period over which the continuous temperature measurements are made plays a vital role here as it may extend over a few days or even over several years. Due to the, at times extreme, climatic conditions the construction type of the equipment is important as well. For our analysis, we conducted several different tests, in which we compared the data recorded by low-price data loggers and those from a higher price range. The study included outside measurements on open land in conditions with no wind, measurements in a climatic chamber, as well as a collection of data in a cave, the Dechenhöhle in Iserlohn, Germany. The focus of the test series lay on reaction times of the different types of data loggers, which is especially important for alternating or short-spanned conditions. It will be shown how to conduct such a test series with a small equipment over a short period of time. This is important as the number of devices 27
5 th Int. Workshop on Ice Caves (IWIC – V) Barzio (LC), Valsassina, Grigna and Milano, September 16 – 23, 2012 Volume of Abstracts available on the market is huge but the producers only ever indicate an approximate resolution, exactitude and operating temperature but do not indicate the exact response time. Moreover, there is no information provided for the performance under real conditions or the handling of the devices. A first analysis has shown that some data loggers from the lower price range perform just as well as those from the higher price range. TEMPERATURE MONITORING IN SLOVENE ICE CAVES EXAMPLES, RESULTS AND DISCUSSION Kosutnik J. 1 1 Cesta Ceneta Stuparja 148, 1231 Ljubljana, Slovenia In 2009 a project of systematic temperature measurements in Slovene ice and cold caves was launched. The aim of the project is to determine the general temperature characteristics of the caves. Approach of our work consist of temperature measurements in 15 caves, all below 1500 meters above sea level, with cold thermal anomaly and ice occurrence long into the worm part of the year. Some investigated caves contain various amounts of perennial ice deposits and other, the so called cold caves (Slovene: ledenica), are significant from the historic point of view as older literature suggest they once held perennial ice deposits. Although each cave is unique in its physical characteristics, the attempt was made to see if temperatures correlate with the cave‟s dynamics. Temperature monitoring along with mass balance and periglacial processes in ice caves were the core of our investigations. In the meeting some interesting Slovene ice caves and temperature measurements are going to be presented. 28
Page 2 and 3: IWIC - V 5 th INTERNATIONAL WORKSHO
Page 4: President 5 th Int. Workshop on Ice
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Page 13 and 14: Dear Participants, we are very plea
Page 46: POSTER PRESENTATIONS
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