2024 Data (Information)

LDEO Surface Processes Instrument Platform v2 (SPIP-2) Data from R/V Falkor cruise FK191120

Zappa, Christopher J.; Witte, Carson Riggs

SPIP-2 is a drifting surface buoy that was deployed daily on cruise FK191120 (https://schmidtocean.org/cruise/studying-the-sea-surface-microlayer-2/) for a total of 26 deployments. The primary data package from SPIP-2 is provided at 1Hz in a netcdf file and includes: Latitude, Longitude, 2-D Winds, Air Pressure, Relative & Absolute Humidity, Precipitation, SW Radiation, and Tilt measurements (Maximet GMX-541); Temperature and Salinity at 10cm depth, 190cm depth, and along a vertical profiling track spanning 30-130cm depth (NBOSI CT Sensors, profiling instrument depth is also provided as a time-dependent variable). Also included in the netcdf file on separate timestamps are high-accuracy Temperature, Salinity, Pressure, and Dissolved Oxygen measurements at 65cm depth (Seabird SBE37SMP/ODO, 45s sampling interval); Significant Wave Height, Peak Wave Period, Maximum Wave Height, Wave Direction, and Wave Spread (XEOS BRIZO-DL Wavelogger, 20-minute statistics); and 3-D current profile in 95 valid 3cm vertical bins spanning 48-330cm depth (2MHz Aquadopp Current Profiler, 15-minute sampling interval, only deployed on final 11 stations of the cruise). Units are included within the netcdf file for each variable. Finally, a separate zip file contains amplitude (.a), correlation (.c) , velocity (.v), header (.hdr), and auxiliary sensor (.sen) files for each deployment of the upward-looking 2MHz Pulse-Coherent Aquadopp HR, which made along-beam velocity measurements at 20° from vertical in 25mm bins spanning 0.5-1.06m depth, used to calculate TKE dissipation.

Keywords: diurnal warm layers, upper ocean stratification, ocean surface processes, upper ocean profiles, TKE dissipation