A Sinkhole Field Experiment in the Eastern Alps

Steinacker, Reinhold; Whiteman, C. David; Dorninger, Manfred; Pospichal, Bernhard; Eisenbach, Stefan; Holzer, A. M.; Weihs, Philipp; Mursch-Radlgruber, Erich; Baumann, Karsten

doi:10.1175/bams-88-5-701

Cited by 40 publications

(41 citation statements)

References 8 publications

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“…Ascent of the air is terminated after reaching the negative energy balance on the surrounding terrain and is followed by a decrease of colder air to the bottom edge of the abyss. Topographic parameter seems to have a correlation with air temperature development with the amount of sky visible from the bottom of the basin (Steinacker et al, 2007). The daily course of meteorological elements in the field depression affects the character of vegetation and nature of the substrate.…”

Section: Resultsmentioning

confidence: 99%

Temperature and humidity conditions of Macocha Abyss

Litschmann¹,

Rožnovský

Středa

et al. 2012

Contributions to Geophysics and Geodesy

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• C. At the bottom of the abyss, the minimum temperatures proved to be higher than at its upper edge and in its vicinity. Thermal circulation is evident to the depth of about 60 m. The highest temperatures were observed in the deeper layers of the abyss in the warm period at around 10 a.m. of Central European Summer Time. Towards the upper edge of the abyss, the hour of daily maximum temperature shifts to 2 to 4 p.m. In the cold season, the minimum temperature was observed between 6 and 7 a.m. of Central European Time. A decrease in the accumulation of cold air (cold-air pool formation) was not found in the lower floors of the abyss. This phenomenon does not occur even during clear nights. The depth of 60 m from the upper edge of the area maintains a high relative humidity (above 95%) in the warm season. However, humidity decreases from this depth towards the top of the abyss. In the cold season, the whole abyss is filled with air with relative humidity of 90 to 95%.

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Section: Resultsmentioning

confidence: 99%

Temperature and humidity conditions of Macocha Abyss

Litschmann¹,

Rožnovský

Středa

et al. 2012

Contributions to Geophysics and Geodesy

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“…Because of the more rapid cooling inside the crater compared to that of the atmosphere above the crater, a temperature jump developed at the level of the crater rim. The development of a deep near-isothermal layer in the upper 80% of the crater atmosphere is a surprising result that differs from nighttime profiles observed in other similar-sized basins (Clements et al 2003;Steinacker et al 2007). A number of hypotheses, including mixing, radiative transfer, and air incur- sions across the rim, are presently being evaluated to explain these observations.…”

Section: Sonic and Hobo Masts And Scintil-lation Measurements For Seichementioning

confidence: 96%

“…These include the Sinbad basin of Colorado (Whiteman et al 1996), the Peter Sinks basin of Utah (Clements et al 2003), and the Gruenloch basin of Austria (Steinacker et al 2007). Investigations of mass, momentum, heat, and moisture budgets in these basins, conducted with limited observational resources, pointed out the important role of the surrounding topography and the complicating effects of advection.…”

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confidence: 99%

Metcrax 2006

Whiteman¹,

Muschinski²,

Zhong³

et al. 2008

Bull. Amer. Meteor. Soc.

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“…The article by Steinacker et al (2002) describes the instruments used in the Gruenloch experiments. In this article, we use selected data from tethered balloon ascents (Figs.…”

Section: Experimental Sites and Equipmentmentioning

confidence: 99%

Effect of Dewfall and Frostfall on Nighttime Cooling in a Small, Closed Basin

Whiteman

Wekker

Haiden

2007

Journal of Applied Meteorology and Climatology

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Series of tethered balloon soundings of temperature and humidity in Austria's Gruenloch basin (floor elevation 1270 m MSL) on two June days showed that the water vapor mixing ratio fell by 2-3 g kg Ϫ1 overnight as dew or frost formed in the basin. After sunrise, the basin atmosphere remoistened as higher humidity was brought down into the basin from above and as evapotranspiration occurred from the basin floor and sidewalls. The latent heat released at night by the dewfall/frostfall was 33%-53% of the overall observed basin sensible heat loss, illustrating the important role of dew and frost formation on the nighttime heat budget of the basin atmosphere. An energy budget equation illustrates the decreasing importance of the latent heat release on the overall basin heat budget as ambient temperatures fall from summer to winter. Because the diurnal temperature range is frequently larger than the late-afternoon dewpoint depression, fog and clouds often form in this basin. The extreme temperature minima that have been previously observed in this basin are expected to be attained only if such cloud moisture is removed. Calculations show that several cloud moisture removal processes may be effective in removing this moisture.

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A Sinkhole Field Experiment in the Eastern Alps

Cited by 40 publications

References 8 publications

Temperature and humidity conditions of Macocha Abyss

Temperature and humidity conditions of Macocha Abyss

Metcrax 2006

Effect of Dewfall and Frostfall on Nighttime Cooling in a Small, Closed Basin

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