SWIFT-A: Shallow Water Ice Fracturing Tracking and Acoustics
A data set containing passive acoustic data from microphones, geophones and hydrophones placed on a frozen lake for 1 week. The experiment was conducted in February of 2024 on Portage Lake in the Upper Peninsula of Michigan, USA.The primary passive data is structured in 1-minute HDF5 files, each containing 8 or 11 channels of ambient ice fracture time series data recorded at 52100 Hz sample rate. The sensors were placed on/below ice ~254mm thick over water ~600mm deep. The secondary data set contains HDF5 files of in a similar structure to the first data set, but contain active impact responses in an array of locations around each acoustic sensor. Active impacts were created with a force hammer at a pre-determined set of impact locations around each acoustic array.
Simple
- Date (Publication)
- 2025-06-27
- Edition
-
1
- Citation identifier
- swifta
- Citation identifier
- doi:10.26050/WDCC/swifta
- Name
-
HDF5
- Keywords
-
-
Ice sheets
-
- Keywords
-
-
acoustics
-
- Keywords
-
-
fracture
-
- Keywords
-
-
ice
-
- Use limitation
-
CC-BY-4.0: Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/
- Language
-
eng; USA
- Begin date
- 2024-02-25
- End date
- 2024-03-05
- Supplemental Information
-
info:eu-repo/grantAgreement/PIPELINE//N000142312656/US//N000142312656
- Distribution format
-
-
HDF5
()
-
HDF5
()
- Transfer size
- 4106752
- OnLine resource
- https://www.wdc-climate.de/ui/entry?acronym=swifta
- Hierarchy level
- collection
- Attribute description
- relative_humidity
- Descriptor
-
relative_humidity [CF-Standard Name]; unit: 1
- Attribute description
- wind_speed_of_gust
- Descriptor
-
Speed is the magnitude of velocity. Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name upward_air_velocity.) The wind speed is the magnitude of the wind velocity. A gust is a sudden brief period of high wind speed. In an observed timeseries of wind speed, the gust wind speed can be indicated by a cell_methods of maximum for the time-interval. In an atmospheric model which has a parametrised calculation of gustiness, the gust wind speed may be separately diagnosed from the wind speed.[CF-Standard Name]; unit: m s-1
- Attribute description
- air_pressure
- Descriptor
-
air_pressure [CF-Standard Name]; unit: Pa
- Attribute description
- wind_from_direction
- Descriptor
-
Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name upward_air_velocity.) In meteorological reports, the direction of the wind vector is usually (but not always) given as the direction from which it is blowing (wind_from_direction) (westerly, northerly, etc.). In other contexts, such as atmospheric modelling, it is often natural to give the direction in the usual manner of vectors as the heading or the direction to which it is blowing (wind_to_direction) (eastward, southward, etc.) "from_direction" is used in the construction X_from_direction and indicates the direction from which the velocity vector of X is coming. [CF-Standard Name]; unit: degree
- Attribute description
- air_temperature
- Descriptor
-
Air temperature is the bulk temperature of the air, not the surface (skin) temperature. [CF-Standard Name]; unit: degC
- Attribute description
- surface_velocity_of_ice_sheet
- Descriptor
-
not filled; unit: m s-1
- Attribute description
- dew_point_temperature
- Descriptor
-
Dew point temperature is the temperature at which a parcel of air reaches saturation upon being cooled at constant pressure and specific humidity. [CF-Standard Name]; unit: degC
- Attribute description
- wind_speed
- Descriptor
-
Speed is the magnitude of velocity. Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name upward_air_velocity.) The wind speed is the magnitude of the wind velocity.[CF-Standard Name]; unit: m s-1
- Attribute description
- sound_pressure_in_water
- Descriptor
-
Sound pressure is the difference from the local ambient pressure caused by a sound wave at a particular location and time [CF-Standard Name]; unit: Pa
- Attribute description
- ice_surface_impact_hammer_force
- Descriptor
-
not filled; unit: N
- Attribute description
- solar_irradiance
- Descriptor
-
The quantity with standard name solar_irradiance, often called Total Solar Irradiance (TSI), is the radiation from the sun integrated over the whole electromagnetic spectrum and over the entire solar disk. The quantity applies outside the atmosphere, by default at a distance of one astronomical unit from the sun, but a coordinate or scalar coordinate variable of distance_from_sun can be used to specify a value other than the default. "Irradiance" means the power per unit area (called radiative flux in other standard names), the area being normal to the direction of flow of the radiant energy.; unit: W m-2
- Attribute description
- sound_pressure_in_air
- Descriptor
-
Sound pressure is the difference from the local ambient pressure caused by a sound wave at a particular location and time [CF-Standard Name]; unit: Pa
- File identifier
- wdc-climate.de:5284144 XML
- Metadata language
-
eng; USA
- Hierarchy level
- collection
- Hierarchy level name
-
swifta
- Date stamp
- 2025-03-24T11:22:30
- Metadata standard name
-
ISO 19115
- Metadata standard version
-
ISO 19115-2:2009
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