Lab climate data

Description This dataset contains indoor laboratory climate measurements and outdoor weather data for laboratories at the Institute of Multiphase Processes, Leibniz University Hannover. It combines sensor measurements from four laboratories with weather observations from the Deutscher Wetterdienst (DWD) and forecast-history data from Open-Meteo. The dataset is intended for analyses comparing indoor laboratory temperature, humidity, and pressure with measured and forecast outdoor weather conditions. Location The laboratory measurements were collected at the Institute of Multiphase Processes, Leibniz University Hannover. Open-Meteo data were requested for the institute location: Latitude: 52.4257 Longitude: 9.6144 The DWD data use station 02014 Hannover: Station name: Hannover Federal state: Niedersachsen Latitude: 52.4644 Longitude: 9.6779 Station height: 55 m Available from: 1992-04-29 Dataset Contents The dataset contains the following file groups: produkt_*.txt: DWD 10-minute observation files for station 02014 Hannover. These include temperature, pressure, humidity, dew point, radiation, and sunshine-duration variables. weather_history_master.csv: Open-Meteo forecast history compiled from previous model runs. For each timestamp, the file contains the current forecast and forecast values issued 1 to 7 days earlier. lab_*_raw.csv: Raw indoor laboratory sensor measurements, recorded approximately every minute. lab_*.csv: Cleaned and combined laboratory datasets containing indoor sensor measurements and matched outdoor/weather variables. The laboratory files cover four laboratories, labelled lab_a, lab_b, lab_c, and lab_d. Laboratory Measurements Raw laboratory files contain: timestamp: measurement timestamp with UTC offset temperature: indoor air temperature in °C pressure: indoor air pressure in hPa humidity: indoor relative humidity in % room: original room or laboratory label window_azimuth: window orientation in degrees The cleaned laboratory files additionally contain matched outdoor variables, including outdoor temperature, humidity, pressure, radiation, sunshine duration, dew point, working-day flag, room label, and window azimuth. Laboratory measurements are recorded approximately every minute. This interval reflects the sensor taking a reading and transmitting it to the database, so small latencies in measurement, processing, or network transmission may occur. Cleaning Procedure The raw laboratory files are preserved separately. The cleaned laboratory files keep only rows where all required indoor and outdoor variables are present. Rows were removed when: Required indoor or outdoor variables were missing. DWD variables contained the -999 missing-value code. Temperature values were below -40 °C or above 60 °C. Relative humidity values were below 0 % or above 100 %. DWD Data DWD files are original product files from the Deutscher Wetterdienst Climate Data Center. They use semicolon-separated values and include an eor end-of-record column. Missing or unavailable DWD measurements are encoded as -999. Important DWD variables include: PP_10: air pressure at station level, hPa TT_10: air temperature at 2 m, °C TM5_10: air temperature near ground, °C RF_10: relative humidity, % TD_10: dew-point temperature, °C DS_10: diffuse radiation, J/cm² GS_10: global radiation, J/cm² SD_10: sunshine duration, hours The accompanying DWD PDF documentation files explain the product structure, variables, quality indicators, and units in more detail. The DWD data and documentation are provided under CC BY 4.0 - Deutscher Wetterdienst, Climate Data Center (CDC). Open-Meteo Forecast History weather_history_master.csv was compiled from Open-Meteo previous model runs. It preserves multiple months of forecast weather data. For each forecast target time, the file contains the most recent forecast and the forecasts issued on the previous 1 to 7 days. Variables include: temperature_2m, °C relative_humidity_2m, % surface_pressure, hPa cloud_cover, % shortwave_radiation, W/m² diffuse_radiation, W/m² The previous model runs API endpoint used for this dataset is: https://previous-runs-api.open-meteo.com/v1/forecast Complete API request used for the previous model runs data: https://previous-runs-api.open-meteo.com/v1/forecast?latitude=52.4257&longitude=9.6144&hourly=temperature_2m,temperature_2m_previous_day1,temperature_2m_previous_day2,temperature_2m_previous_day3,temperature_2m_previous_day4,temperature_2m_previous_day5,temperature_2m_previous_day6,temperature_2m_previous_day7,relative_humidity_2m,relative_humidity_2m_previous_day1,relative_humidity_2m_previous_day2,relative_humidity_2m_previous_day3,relative_humidity_2m_previous_day4,relative_humidity_2m_previous_day5,relative_humidity_2m_previous_day6,relative_humidity_2m_previous_day7,surface_pressure,surface_pressure_previous_day1,surface_pressure_previous_day2,surface_pressure_previous_day3,surface_pressure_previous_day4,surface_pressure_previous_day5,surface_pressure_previous_day6,surface_pressure_previous_day7,cloud_cover,cloud_cover_previous_day1,cloud_cover_previous_day2,cloud_cover_previous_day3,cloud_cover_previous_day4,cloud_cover_previous_day5,cloud_cover_previous_day6,cloud_cover_previous_day7,shortwave_radiation,shortwave_radiation_previous_day1,shortwave_radiation_previous_day2,shortwave_radiation_previous_day3,shortwave_radiation_previous_day4,shortwave_radiation_previous_day5,shortwave_radiation_previous_day6,shortwave_radiation_previous_day7,diffuse_radiation,diffuse_radiation_previous_day1,diffuse_radiation_previous_day2,diffuse_radiation_previous_day3,diffuse_radiation_previous_day4,diffuse_radiation_previous_day5,diffuse_radiation_previous_day6,diffuse_radiation_previous_day7&past_days=92&timezone= The Open-Meteo previous model runs approach is described here: https://openmeteo.substack.com/p/weather-forecasts-from-previous-model-runs Open-Meteo should be cited as: Zippenfenig, P. (2023). Open-Meteo.com Weather API [Computer software]. Zenodo. https://doi.org/10.5281/ZENODO.7970649 Notes for Reuse The cleaned laboratory files are suitable for direct analysis when complete indoor/outdoor rows are required. The raw laboratory files should be used when reproducing or modifying the cleaning procedure. Radiation units differ between DWD and Open-Meteo. DWD radiation variables are given in J/cm², while Open-Meteo radiation forecast variables are given in W/m². These units must be converted to a common unit before direct comparison, merging, or model training.