Sea ice core biogeochemical data collected during the 2019 SCALE Winter Cruise

Title: Biogeochemical profiles of sea ice cores sampled during the Southern oCean seAsonal Experiment (SCALE) winter cruise in 2019. Authors: Riesna R. Audh, Siobhan Johnson, Mark Hambrock, Hazel Little, Joshua Mirkin, Emmanuel Omatuku, Benjamin Hall, Tokoloho Rampai, Keith MacHutchon, Sebastian Ska...

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Main Authors: Audh, Riesna R., Johnson, Siobhan, Hambrock, Mark, Little, Hazel, Mirkin, Joshua, Omatuku, Emmanuel, Hall, Benjamin, Rampai, Tokoloho, MacHutchon, Keith, Skatulla, Sebastian, Fawcett, Sarah E., Vichi, Marcello
Format: Other/Unknown Material
Language:English
Published: Zenodo 2023
Subjects:
Online Access:https://doi.org/10.5281/zenodo.7821287
id ftzenodo:oai:zenodo.org:7821287
record_format openpolar
spelling ftzenodo:oai:zenodo.org:7821287 2024-09-15T17:41:51+00:00 Sea ice core biogeochemical data collected during the 2019 SCALE Winter Cruise Audh, Riesna R. Johnson, Siobhan Hambrock, Mark Little, Hazel Mirkin, Joshua Omatuku, Emmanuel Hall, Benjamin Rampai, Tokoloho MacHutchon, Keith Skatulla, Sebastian Fawcett, Sarah E. Vichi, Marcello 2023-04-12 https://doi.org/10.5281/zenodo.7821287 eng eng Zenodo https://zenodo.org/communities/scale_south_africa https://doi.org/10.5281/zenodo.7821286 https://doi.org/10.5281/zenodo.7821287 oai:zenodo.org:7821287 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode sea ice cores Antarctica pancake ice sea ice biogeochemistry nutrients info:eu-repo/semantics/other 2023 ftzenodo https://doi.org/10.5281/zenodo.782128710.5281/zenodo.7821286 2024-07-25T19:09:23Z Title: Biogeochemical profiles of sea ice cores sampled during the Southern oCean seAsonal Experiment (SCALE) winter cruise in 2019. Authors: Riesna R. Audh, Siobhan Johnson, Mark Hambrock, Hazel Little, Joshua Mirkin, Emmanuel Omatuku, Benjamin Hall, Tokoloho Rampai, Keith MacHutchon, Sebastian Skatulla, Sarah E. Fawcett, Marcello Vichi Data Description: Abstract Biogeochemical profiles of sea ice cores extracted from in situ sea ice floes and lifted pancakes were measured in the Atlantic sector of the Antarctic Marginal Ice Zone during the Southern oCean seAsonal Experiment (SCALE) winter cruise in 2019 ( www.scale.org.za ) aboard the SA Agulhas II. A total of four sea ice cores (cores) were sampled during the cruise. Two cores were collected overboard on a consolidated floe that was accessed via a personnel carrier suspended by the ship’s forward crane. Two cores were collected from a pancake that was lifted aboard the ship via a net that was attached to the ship’s aft crane and placed on the helideck for sampling. Profiles were obtained by cutting the cores using a bandsaw in a cold laboratory at -10 °C. The cores were cut into approximately 0.05 m segments, starting from the bottom of the core. These segments were allowed to melt in the dark in an insulated box. The meltwater was filtered for chlorophyll measurements (Welschmeyer, 1994) and the filtrate was analysed for oxygen isotopes (Walker and others, 2015), ammonium (Holmes et al., 1999), phosphate, nitrate, nitrite and silicate (using a SEAL AA500 segmented flow autoanalyser). These values are reported at the depth of the top of the segment in the core in μM. In order to facilitate comparison with the seawater concentrations below the ice, the in-ice nutrients (including NH4+) were salinity normalised using the equation of Fripiat and others (2017): C norm = C SwS Where C is the measured bulk concentration, Sw is the salinity of the seawater, and S is the corresponding measured bulk salinity of the ice segment. Although sampling of the core occurred ... Other/Unknown Material Antarc* Antarctic Antarctica ice core Sea ice Southern Ocean Zenodo
institution Open Polar
collection Zenodo
op_collection_id ftzenodo
language English
topic sea ice cores
Antarctica
pancake ice
sea ice
biogeochemistry
nutrients
spellingShingle sea ice cores
Antarctica
pancake ice
sea ice
biogeochemistry
nutrients
Audh, Riesna R.
Johnson, Siobhan
Hambrock, Mark
Little, Hazel
Mirkin, Joshua
Omatuku, Emmanuel
Hall, Benjamin
Rampai, Tokoloho
MacHutchon, Keith
Skatulla, Sebastian
Fawcett, Sarah E.
Vichi, Marcello
Sea ice core biogeochemical data collected during the 2019 SCALE Winter Cruise
topic_facet sea ice cores
Antarctica
pancake ice
sea ice
biogeochemistry
nutrients
description Title: Biogeochemical profiles of sea ice cores sampled during the Southern oCean seAsonal Experiment (SCALE) winter cruise in 2019. Authors: Riesna R. Audh, Siobhan Johnson, Mark Hambrock, Hazel Little, Joshua Mirkin, Emmanuel Omatuku, Benjamin Hall, Tokoloho Rampai, Keith MacHutchon, Sebastian Skatulla, Sarah E. Fawcett, Marcello Vichi Data Description: Abstract Biogeochemical profiles of sea ice cores extracted from in situ sea ice floes and lifted pancakes were measured in the Atlantic sector of the Antarctic Marginal Ice Zone during the Southern oCean seAsonal Experiment (SCALE) winter cruise in 2019 ( www.scale.org.za ) aboard the SA Agulhas II. A total of four sea ice cores (cores) were sampled during the cruise. Two cores were collected overboard on a consolidated floe that was accessed via a personnel carrier suspended by the ship’s forward crane. Two cores were collected from a pancake that was lifted aboard the ship via a net that was attached to the ship’s aft crane and placed on the helideck for sampling. Profiles were obtained by cutting the cores using a bandsaw in a cold laboratory at -10 °C. The cores were cut into approximately 0.05 m segments, starting from the bottom of the core. These segments were allowed to melt in the dark in an insulated box. The meltwater was filtered for chlorophyll measurements (Welschmeyer, 1994) and the filtrate was analysed for oxygen isotopes (Walker and others, 2015), ammonium (Holmes et al., 1999), phosphate, nitrate, nitrite and silicate (using a SEAL AA500 segmented flow autoanalyser). These values are reported at the depth of the top of the segment in the core in μM. In order to facilitate comparison with the seawater concentrations below the ice, the in-ice nutrients (including NH4+) were salinity normalised using the equation of Fripiat and others (2017): C norm = C SwS Where C is the measured bulk concentration, Sw is the salinity of the seawater, and S is the corresponding measured bulk salinity of the ice segment. Although sampling of the core occurred ...
format Other/Unknown Material
author Audh, Riesna R.
Johnson, Siobhan
Hambrock, Mark
Little, Hazel
Mirkin, Joshua
Omatuku, Emmanuel
Hall, Benjamin
Rampai, Tokoloho
MacHutchon, Keith
Skatulla, Sebastian
Fawcett, Sarah E.
Vichi, Marcello
author_facet Audh, Riesna R.
Johnson, Siobhan
Hambrock, Mark
Little, Hazel
Mirkin, Joshua
Omatuku, Emmanuel
Hall, Benjamin
Rampai, Tokoloho
MacHutchon, Keith
Skatulla, Sebastian
Fawcett, Sarah E.
Vichi, Marcello
author_sort Audh, Riesna R.
title Sea ice core biogeochemical data collected during the 2019 SCALE Winter Cruise
title_short Sea ice core biogeochemical data collected during the 2019 SCALE Winter Cruise
title_full Sea ice core biogeochemical data collected during the 2019 SCALE Winter Cruise
title_fullStr Sea ice core biogeochemical data collected during the 2019 SCALE Winter Cruise
title_full_unstemmed Sea ice core biogeochemical data collected during the 2019 SCALE Winter Cruise
title_sort sea ice core biogeochemical data collected during the 2019 scale winter cruise
publisher Zenodo
publishDate 2023
url https://doi.org/10.5281/zenodo.7821287
genre Antarc*
Antarctic
Antarctica
ice core
Sea ice
Southern Ocean
genre_facet Antarc*
Antarctic
Antarctica
ice core
Sea ice
Southern Ocean
op_relation https://zenodo.org/communities/scale_south_africa
https://doi.org/10.5281/zenodo.7821286
https://doi.org/10.5281/zenodo.7821287
oai:zenodo.org:7821287
op_rights info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
op_doi https://doi.org/10.5281/zenodo.782128710.5281/zenodo.7821286
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