Stefan Hendricks
type: Person
family name: Hendricks
given name: Stefan

Christian Haas
type: Person
family name: Haas
given name: Christian

Thomas Krumpen
type: Person
family name: Krumpen
given name: Thomas

SIZONet 2012 - Data Acquisition Report
type: CreativeWork
type: Report
creator: Stefan Hendricks
creator: Priska A Hunkeler
  type: Person
  family name: Hunkeler
  given name: Priska A
creator: Erik Lied
  type: Person
  family name: Lied
  given name: Erik
creator: Hajo Eicken
  type: Person
  family name: Eicken
  given name: Hajo
creator: Andy Mahoney
  type: Person
  family name: Mahoney
  given name: Andy
date published: 2013
is part of: Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven
additional type: report

Electromagnetic induction sounding of sea-ice thickness / SBLA_Processing · GitLab
type: CreativeWork
type: WebPage

Sea Ice Surface Roughness from Single Beam Laser Altimeter Measurements - Method Development and Comparison with Airborne Laser Scanner Profiles
type: CreativeWork
type: Thesis
creator: Mira Suhrhoff
  type: Person
  family name: Suhrhoff
  given name: Mira
date published: 2021
source organization: Universität Trier
additional type: thesis

Time
type: DefinedTerm
alternate name: T

Length
type: DefinedTerm
alternate name: L

height
type: DefinedTerm

laser altimeters
type: DefinedTerm

left
type: DefinedTerm

right
type: DefinedTerm

data matrix.tab
type: FileObject
type: DataDownload
encoding format: text/tab-separated-values

Smoother sea ice with fewer pressure ridges in a more dynamic Arctic
type: CreativeWork
type: ScholarlyArticle
creator: Thomas Krumpen
creator: Luisa von Albedyll
creator: Hans Jakob Bünger
creator: Giulia Castellani
creator: Jörg Hartmann
creator: Veit Helm
creator: Stefan Hendricks
creator: Nils Hutter
creator: Jack Landy
creator: Simeon Lisovski
creator: Christof Lüpkes
creator: Jan Rohde
  type: Person
  family name: Rohde
  given name: Jan
creator: Mira Suhrhoff
  type: Person
  family name: Suhrhoff
  given name: Mira
creator: Christian Haas
date published: 2025
is part of: Nature Climate Change
additional type: journal article
is based on: Laser altimeter data obtained over sea-ice during the SIZONet campaign in Apr, 2012; profile SIZONet2012_SBLA_20120409T2304_71.76_-156.35_thr06_data_Vers5
  type: Dataset
  conforms to: http://mlcommons.org/croissant/1.0
  creator: Stefan Hendricks
  creator: Christian Haas
  creator: Thomas Krumpen
  publisher: PANGAEA
    type: Organization
    disambiguating description: Data Publisher for Earth & Environmental Science
  included in data catalog: PANGAEA
    type: DataCatalog
    disambiguating description: Data Publisher for Earth & Environmental Science
  date published: 2024-07-12
  is part of: https://doi.org/10.1594/PANGAEA.970983
  additional type: dataset
  description: Sea ice surface roughness data were obtained during the SIZONet campaign in Apr, 2012 with a Single Beam Laser Altimeter (SBLA) mounted inside an electromagnetic system (EM-Bird) towed at 10-30 m height above surface by a Helicopter (Unknown model). A method developed by Hibler (1972) was used to a) isolate the surface profile from low-frequency variations associated with the aircraft motion and b) to identify pressure ridge sails. The processing steps are described in https://epic.awi.de/id/eprint/56364/. We applied a ridge detection threshold of 0.6 m, which means that only sails higher 0.6 m are detected. Version and name of the processing routine: Laser_Altimeter_Processing_VS5_06_20.py (vers.5, Feb 22, 2024, https://gitlab.awi.de/sitem/sbla_processing.git). SBLA records (RIEGL - LD90) are provided at a sampling rate of 100 Hz. Sensor accuracy is 5 cm with a beam diameter at surface of 5.8 cm. This specific dataset was obtained on 20120409T2304. It includes recorded altimeter readings, the derived surface elevation and width/height/spacing of detected pressure ridge sails. Note on data quality: 5.8 cm . File name: [DMS/PANGAEA Campaing Identifier] + [DEVICE] + [DATE/TIME] + [LAT/LON] + [Detection Threshold] + [Object] + [Version] + [Format]
  abstract: Sea ice surface roughness data were obtained during the SIZONet campaign in Apr, 2012 with a Single Beam Laser Altimeter (SBLA) mounted inside an electromagnetic system (EM-Bird) towed at 10-30 m height above surface by a Helicopter (Unknown model). A method developed by Hibler (1972) was used to a) isolate the surface profile from low-frequency variations associated with the aircraft motion and b) to identify pressure ridge sails. The processing steps are described in https://epic.awi.de/id/eprint/56364/. We applied a ridge detection threshold of 0.6 m, which means that only sails higher 0.6 m are detected. Version and name of the processing routine: Laser_Altimeter_Processing_VS5_06_20.py (vers.5, Feb 22, 2024, https://gitlab.awi.de/sitem/sbla_processing.git). SBLA records (RIEGL - LD90) are provided at a sampling rate of 100 Hz. Sensor accuracy is 5 cm with a beam diameter at surface of 5.8 cm. This specific dataset was obtained on 20120409T2304. It includes recorded altimeter readings, the derived surface elevation and width/height/spacing of detected pressure ridge sails. Note on data quality: 5.8 cm . File name: [DMS/PANGAEA Campaing Identifier] + [DEVICE] + [DATE/TIME] + [LAT/LON] + [Detection Threshold] + [Object] + [Version] + [Format]
  citation: Electromagnetic induction sounding of sea-ice thickness / SBLA_Processing · GitLab
  spatial coverage: Place
    geo: GeoShape
      box: 71.57177 -156.53001 71.950423 -156.17156
  temporal coverage: 2012-04-09T23:05:34/2012-04-09T23:23:00
  size: QuantitativeValue
    value: 196510.0
    unit text: data points
  variable measured: DATE/TIME
    type: PropertyValue
    subject of: DefinedTermSet
      has defined term: Time
  variable measured: Time in seconds
    type: PropertyValue
    unit text: s
    subject of: DefinedTermSet
      has defined term: Time
  variable measured: LATITUDE
  variable measured: LONGITUDE
  variable measured: POINT DISTANCE from start
    type: PropertyValue
    unit text: m
    subject of: DefinedTermSet
      has defined term: Length
  variable measured: HEIGHT above ground
    type: PropertyValue
    unit text: m
    measurement technique: Single beam laser altimeter
    subject of: DefinedTermSet
      has defined term: height
      has defined term: Length
      has defined term: laser altimeters
  variable measured: Surface elevation
    type: PropertyValue
    unit text: m
    measurement technique: Single beam laser altimeter
    description: Height of the sea ice surface relative to the level ice
    subject of: DefinedTermSet
      has defined term: Length
      has defined term: laser altimeters
  variable measured: Ridge height, maximum
    type: PropertyValue
    unit text: m
    measurement technique: Single beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.py
    description: Higest point of a pressure ridge sail
    subject of: DefinedTermSet
      has defined term: maximum
      has defined term: Length
  variable measured: Ridge boundary, left
    type: PropertyValue
    unit text: m
    measurement technique: Single beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.py
    description: Left boundary of identified pressure ridge sail
    subject of: DefinedTermSet
      has defined term: left
      has defined term: Length
  variable measured: Ridge boundary, right
    type: PropertyValue
    unit text: m
    measurement technique: Single beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.py
    description: Right boundary of identified pressure ridge sail
    subject of: DefinedTermSet
      has defined term: right
      has defined term: Length
  variable measured: Ridge width
    type: PropertyValue
    unit text: m
    measurement technique: Single beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.py
    description: Width of pressure ridge sail
    subject of: DefinedTermSet
      has defined term: Length
  variable measured: Ridge spacing, typical
    type: PropertyValue
    unit text: m
    measurement technique: Single beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.py
    description: Distance to preceding ridge sail
    subject of: DefinedTermSet
      has defined term: Length
  variable measured: Lead event (true/false)
    type: PropertyValue
    measurement technique: Single beam laser altimeter; processed with laser_Altimeter_Processing_VS5_06_20.py
    description: If set to 1, then EM-Bird based sea-ice thickness is below 0.2 m (lead/open water). Note that EM-Bird data is provided at a sampling rate of 10 Hz
  keywords: Laser Altimeter; Ridge Height; Ridge Spacing; Ridge Width; Sea Ice Surface Roughness
  license: https://creativecommons.org/licenses/by/4.0/
  conditions of access: unrestricted
  is accessible for free: true
  language: en
  distribution: data matrix.tab
  distribution: FileObject
    type: DataDownload
    encoding format: text/html

Luisa von Albedyll
type: Person
family name: von Albedyll
given name: Luisa

Hans Jakob Bünger
type: Person
family name: Bünger
given name: Hans Jakob

Giulia Castellani
type: Person
family name: Castellani
given name: Giulia

Jörg Hartmann
type: Person
family name: Hartmann
given name: Jörg

Veit Helm
type: Person
family name: Helm
given name: Veit

Nils Hutter
type: Person
family name: Hutter
given name: Nils

Jack Landy
type: Person
family name: Landy
given name: Jack

Simeon Lisovski
type: Person
family name: Lisovski
given name: Simeon

Christof Lüpkes
type: Person
family name: Lüpkes
given name: Christof