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  • Anemometer; Bad Lauchstädt; BARO; Barometer; BL_ASC; BL_DAT; BL_DWD; BL_fiktiv; BL_SYNMET; DATE/TIME; Field observation; Germany, Bad Lauchstaedt; Hair hygrometer; historical weather data; Humidity, relative, daily mean; meteorological data; Precipitation, daily total; Pressure, atmospheric, daily mean; Short-wave downward (GLOBAL) radiation, daily sum; Station label; Temperature, air, daily maximum; Temperature, air, daily mean; Temperature, air, daily minimum; Temperature, soil, daily mean; weather data; weather station; Weather station/meteorological observation; Weather Station ID 1; Weather Station ID 113; Weather Station ID 136; Weather Station ID 55; Weather Station ID 56; Wind direction, daily mean; Wind speed, daily mean; Wind vane; WST  (1)
  • evaporation  (1)
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  • 1
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    Unknown
    Evaporation Study Based on Micromodel Experiments: Comparison of Theory and Experiment (2021)
    Details
    Publication Date: 2021-10-11
    Description: Abstract Evaporation—a key process for water exchange between soil and atmosphere—is controlled by internal water fluxes and surface vapor fluxes. Recent studies demonstrated that the dynamics of the water flow in corners determine the time behavior of the evaporation rate. The internal water flux of the porous media is often described by capillary flow assuming complete wetting. Particularly, the crucial influence of partial wetting, that is, the nonlinear contact angle dependency of the capillary flow has been neglected so far. The focus of the paper is to demonstrate that SiO2-surfaces can exhibit contact angles of about 40°. This reduces the internal capillary flow by 1 order of magnitude compared to complete wetting. First, we derived the contact angle by inverse modeling. We conducted a series of evaporation experiments in a 2-D square lattice microstructure connected by lognormal distributed throats. We used an explicit analytical power series solution of the single square capillary model. A contact angle of 38° ± 1° was derived. Second, we directly measured the contact angle of the Si-SiO2 wafer using the Drop Shape Analyzer Krüss 100 and obtained an averaged contact angle of 42° ± 2°. The results support the single square capillary model as an appropriate model for the description of the evaporation process in an ideal square capillary.
    Keywords: 550.724 ; 551.5 ; evaporation ; experiments
    Language: English
    Type: map
    Location Call Number Expected Availability
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    CITATION GEO-LEO
  • 2
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    Meteorological data (1997-2018) of experimental field station in Bad Lauchstädt, Germany (2022)
    PANGAEA
    Details
    Publication Date: 2023-07-14
    Description: The considered data set contains measurements of 4 automatic weather stations from 1997 until 2018 installed by Helmholtz Centre for Environmental Research - UFZ GmbH. Here, the main station corresponded to typical sensor technology and equipment of the German Meteorological Service [Deutscher Wetterdienst, DWD]. These data were quality-checked and processed as daily values. As far as possible, erroneous values were replaced by means of other stations on site. Very short failures could be supplemented by interpolation or averaging. Hence, values of measured variable can originate from different stations. However, only one value for each measured variable is provided for every day within the table. A unique label for individual weather stations is used to identify the exact origin of data.
    Keywords: Anemometer; Bad Lauchstädt; BARO; Barometer; BL_ASC; BL_DAT; BL_DWD; BL_fiktiv; BL_SYNMET; DATE/TIME; Field observation; Germany, Bad Lauchstaedt; Hair hygrometer; historical weather data; Humidity, relative, daily mean; meteorological data; Precipitation, daily total; Pressure, atmospheric, daily mean; Short-wave downward (GLOBAL) radiation, daily sum; Station label; Temperature, air, daily maximum; Temperature, air, daily mean; Temperature, air, daily minimum; Temperature, soil, daily mean; weather data; weather station; Weather station/meteorological observation; Weather Station ID 1; Weather Station ID 113; Weather Station ID 136; Weather Station ID 55; Weather Station ID 56; Wind direction, daily mean; Wind speed, daily mean; Wind vane; WST
    Type: Dataset
    Format: text/tab-separated-values, 218322 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
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