Gassen, Lisa; Esters, Leonie; Ribas-Ribas, Mariana; Wurl, Oliver (2024): Rainfall experiment 2 conducted in a large seawater tank with three different nozzle types and rain intensities, and added turbulence - CTD measurement [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.964911, In: Gassen, L et al. (2024): Measurements of sea surface temperature and salinity in a large seawater basin under varying precipitation intensities and droplet characteristics [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.964902
Always quote citation above when using data! You can download the citation in several formats below.
Published: 2024-03-26 • DOI registered: 2024-04-10
Abstract:
We provide data from experiments with artificial rain over a 5100-liter basin with a retractable roof, where temperature and conductivity (to calculate salinity) were measured at different depths in the upper sea surface, as well as rain properties (intensity, rain temperature, droplet size and velocity). Three different nozzle types were used to investigate the impacts of droplet properties on temperature and salinity anomalies at the sea surface. To measure droplet sizes and velocities, we made calibration measurements with an optical laser disdrometer before the actual experiments. In the first experiments, we excluded external influences such as wind-driven mixing to show on a very small vertical and horizontal scale how very different rainfall intensities and properties such as droplet sizes and velocities affect sea surface temperature and salinity. In a second series of experiments, we used different stages of a flow pump to add turbulence to the basin and find out how quickly the rain water mixes with the seawater at the near-surface layer. The duration of the artificial rain was 15 minutes for all experiments. We used an acoustic doppler velocimeter (ADV) to calculate turbulent kinetic energy at two different depths (14 and 44 cm) within the basin. Additional samples from the sea surface microlayer (SML) were collected before and after the artificial rain in both experiments.
Keyword(s):
Comment:
Data from the second experiment: again with three different nozzle types and rain intensities, but this time we added turbulence in the tank with a large flow pump at three different levels (0 %, 0.5 %, and 1 %). Temperature and conductivity (for later calculation of salinity) were measured at different depths.
Location of the mesocosm experiment: Sea-SurFace Facility (SURF), Institute of Chemistry and Biology of the marine Environment, Schleusenstraße 1, 26382 Wilhelmshaven, Coordinates: 53.5148, 8.1463
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sampling date/time, experiment | Date/time sampling exp | Gassen, Lisa | |||
| 2 | Type of study | Study type | Gassen, Lisa | |||
| 3 | Sensor, number | Sensor no | Gassen, Lisa | sensor ID | ||
| 4 | Salinity | Sal | Gassen, Lisa | CTD, Idronaut, Ocean Seven 310 | corrected, The difference of the sensors during a period when the tank was completely mixed was calculated | |
| 5 | Salinity, absolute | ASAL | g/kg | Gassen, Lisa | calculated with COARE-Algorithm, corrected | |
| 6 | Temperature, water | Temp | °C | Gassen, Lisa | CTD, Idronaut, Ocean Seven 310 | |
| 7 | Conductivity | Cond | mS/cm | Gassen, Lisa | CTD, Idronaut, Ocean Seven 310 | |
| 8 | Pressure, water | Press | dbar | Gassen, Lisa | CTD, Idronaut, Ocean Seven 310 [Sensor ID: 50-60]; CTD, 48M, Sea & Sun [Sensor ID: 1506-1507] | |
| 9 | DEPTH, water, experiment | Depth water exp | m | Gassen, Lisa | Scale | Geocode |
| 10 | Identification | ID | Gassen, Lisa | Nozzle, Spraying Systems Germany GmbH, 1/8" GG1, GG2, and GG3 | GG1, GG2, and GG3 here referred to as N1, N2, and N3 | |
| 11 | Treatment: rain intensity | T:rain | mm/h | Gassen, Lisa | calculated based on the flow meter (Flowmax 42i, MIB GmbH) measurements, area and time the rainfall was simulated | |
| 12 | Pump stage | Pump stage | % | Gassen, Lisa | Flow pump, AFC400IPU, Abyzz | pump stage of flow pump (possible from 0-100%), we conducted the second Experiment with pump off (0%), 0.5, and 1%. For mixing the entire mesocosm we used 20% of power level |
| 13 | Method comment | Method comm | Gassen, Lisa | nonrainy/rainy, indicates the 15 minute time period, where artificial rainfall was added to the mesocosm |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
51840 data points
Download Data
View dataset as HTML (shows only first 2000 rows)