GLORIA — GEOMAR Library Ocean Research Information Access

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Airborne snow depth on sea ice during the IceBird Winter 2019 campaign in the Arctic Ocean, Version 1 (2021)

Jutila, Arttu ; King, Joshua ; Ricker, Robert ; [et al.]

PANGAEA

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Publication Date: 2023-07-03

Description: Airborne observations of snow depth on sea ice were made in April 2019 during the winter campaign of the AWI IceBird campaign series. The data consist of five surveys, some with overlapping segments at low and high altitude, spanning sea-ice covered areas in the Lincoln Sea, Central Arctic Ocean, as well as the Beaufort Sea. For each flight, the geolocated snow depth data from an airborne frequency-modulated continuous-wave ultrawideband radar using an algorithm based on signal peakiness are provided with a point spacing of approximately 4-5 meters for low-altitude flights and 7-9 meters for high-altitude flights. The trajectory data contain the full and unfiltered data record with quality flags. Longer sections of altitude-flagged data in the low-altitude data arise from calibrations of an EM sensor. Each snow depth value represents the average depth within the radar footprint that has a theoretical smooth surface cross-/along-track diameter of 2.6/1.0 m at low altitude and 7.2/5.1 m at the high altitude.

Keywords: Airborne surveys to collect measurements of sea ice thickness in the Arctic; Arctic Ocean; AWI_IceBird; AWI_SeaIce; Cryosphere; Sea ice; Sea Ice Physics @ AWI; snow depth

Type: Dataset

Format: application/zip, 7 datasets

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Airborne snow depth on sea ice during the PAMARCMIP2017 campaign in the Arctic Ocean, Version 1 (2021)

Jutila, Arttu ; King, Joshua ; Ricker, Robert ; [et al.]

PANGAEA

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Publication Date: 2023-07-03

Description: Airborne observations of snow depth on sea ice were made in March and April 2017 as part of the Polar Airborne Measurements and Arctic Regional Climate Model Simulation Project (PAMARCMIP) under the AWI IceBird campaign series. The data consist of six surveys spanning sea-ice covered areas in the Lincoln Sea, Central Arctic Ocean, as well as the Beaufort and Chukchi Seas. For each flight, the geolocated snow depth data from an airborne frequency-modulated continuous-wave ultrawideband radar using an algorithm based on signal peakiness are provided with a point spacing of approximately 4-5 meters. The trajectory data contain the full and unfiltered data record with quality flags. Longer sections of altitude-flagged data arise from calibrations of an EM sensor. Each snow depth value represents the average depth within the radar footprint that has a theoretical smooth surface cross-/along-track diameter of 2.6/1.0 m.

Keywords: Airborne surveys to collect measurements of sea ice thickness in the Arctic; Arctic Ocean; AWI_IceBird; AWI_SeaIce; Cryosphere; Sea ice; Sea Ice Physics @ AWI; snow depth

Type: Dataset

Format: application/zip, 6 datasets

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Modelled age-depth profile at location of the Beyond EPICA drill site (BELDC) based on the sledge-borne DEep LOoking Radio Echo Sounder (DELORES) survey (2024)

Chung, Ailsa ; Parrenin, Frédéric ; Steinhage, Daniel ; [et al.]

PANGAEA

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Publication Date: 2024-05-01

Description: We used a 1D numerical model constrained by radar horizons to find the age-depth profile at the European Beyond EPICA - Oldest Ice project drill site (BELDC; 75.29917 °S, 122.44516 °E) on Little Dome C (LDC), Antarctica. Further details on the model can be found in the associated publication: Chung et al., 2023 (The Cryosphere). The model was constrained by 20 horizons from the radar survey conducted over the Dome C region conducted by the British Antarctic Survey over the 2016-17 and 2017-18 Antarctic field seasons using the sledge-borne DEep LOoking Radio Echo Sounder (DELORES; Mulvaney et al., 2023). The age-depth profile extends to the deepest point where modelled age density 〈 20 ka/m - the threshold for which a paleoclimatic signal can reasonably be extracted.

Keywords: Accumulation rate in ice equivalent per year; Age, 1D numerical model; Age density; BELDC_site; BE-OI; Beyond EPICA drill site; Beyond EPICA - Oldest Ice; DEPTH, ice/snow; Ice age; Ice age, uncertainty; MULT; Multiple investigations; Thinning function; Velocity, vertical

Type: Dataset

Format: text/tab-separated-values, 5316 data points

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Modelled age-depth profile at location of the Beyond EPICA drill site (BELDC) based on the Little Dome C-Very High Frequency radar system (LDC-VHF) survey (2024)

Chung, Ailsa ; Parrenin, Frédéric ; Steinhage, Daniel ; [et al.]

PANGAEA

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Publication Date: 2024-05-01

Description: We used a 1D numerical model constrained by radar horizons to find the age-depth profile at the European Beyond EPICA - Oldest Ice project drill site (BELDC; 75.29917 °S, 122.44516 °E) on Little Dome C (LDC), Antarctica. Further details on the model can be found in the associated publication: Chung et al., 2023 (The Cryosphere). The model was constrained by 19 horizons from the radar survey conducted during the 2019-20 Antarctic field season in a collaboration between the University of Alabama (UA), the University of Copenhagen (CPH) and the Alfred Wegener Institute (AWI), using the Little Dome C-Very High Frequency radar system (LDC-VHF; Chung et al., 2023, PANGAEA).. The age-depth profile extends to the deepest point where modelled age density 〈 20 ka/m - the threshold for which a paleoclimatic signal can reasonably be extracted.

Type: Dataset

Format: text/tab-separated-values, 5268 data points

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