Data

Cape Evans sea ice physical and biological properties

Australian Ocean Data Network
Meiners, K.M. ; MEINERS, KLAUS MARTIN
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This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/).

Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4546_CapeEvans_SeaIce_2019 when using these data.
http://creativecommons.org/licenses/by/4.0/).

Attribution 4.0 International (CC BY 4.0)

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This metadata record is publicly available.

These data are publicly available for download from the provided URL.

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Brief description

Fast ice was sampled roughly every second day over a 4-week period (November 2019) at a coastal site just off Cape Evans (McMurdo Sound). Ice cores were collected to determine vertical profiles of temperature, salinity, as well as the chlorophyll-a concentration in the lowermost 10 cm (two times 5-cm sections) of the ice cores. Measurements also included snow thickness, ice thickness and sea-ice freeboard levels. The data were collected as part of AAS 4546 and contribute to a larger NZ-led project, Antarctica New Zealand Event KS043, led by Dr Andrew Martin (Victoria University Wellington). Ice cores were sampled from the same 2m2 area using a Kovacs Mark II ice corer (9 cm internal diameter) powered with an electric drill. Snow thickness was measured with a ruler before sampling, and sea ice thickness and freeboard measurements were taken from the resulting ice core holes. Sea ice temperatures were measured with a Testotherm720 thermometer (accuracy 0.2 °C immediately after ice core retrieval from small holes drilled in the core at 5 – 10 cm intervals. Thereafter we sectioned the core in 0.05 to 0.15 m sections using a stainless steel saw. Ice core sections were placed in Milli-Q water washed polyethylene (PE) containers and melted at 4 °C in the dark within 24 to 36 hours after sampling. Ice bulk salinity was determined on the melted samples with a calibrated conductivity meter. Sub-samples of known volume were subsequently filtered onto Whatman GF/F filters and stored frozen (liquid nitrogen) until extraction with acetone for 24 hours at 4 °C in the dark and determination of the chlorophyll a (Chl a) concentration with a Turner Designs 10AU fluorometer according to Arar and Collins (1997, EPA Method 445.0). Chl a is reported in µg l-1 melted sea ice.

Lineage

Progress Code: completed
Statement: These are good quality sea ice in-situ measurements

Notes

Purpose
Short time-series of physical and biological land-fast sea ice properties to understand spring-time ice algal bloom dynamics.

Data time period: 2019-11-11 to 2019-11-26

This dataset is part of a larger collection

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166,-77 166,-78 165,-78 165,-77 166,-77

165.5,-77.5

text: westlimit=165; southlimit=-78; eastlimit=166; northlimit=-77

text: uplimit=0; downlimit=0

text: uplimit=3; downlimit=0

Subjects
AMD | AMD/AU | CEOS | CONTINENT > ANTARCTICA > CAPE EVANS | CONTINENT > ANTARCTICA > MCMURDO SOUND | CORING DEVICES > CORING DEVICES | EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PLANTS > MICROALGAE | EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE DEPTH/THICKNESS | EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE TEMPERATURE | EARTH SCIENCE > CRYOSPHERE > SEA ICE > SALINITY | EARTH SCIENCE > OCEANS > OCEAN OPTICS > CHLOROPHYLL > CHLOROPHYLL CONCENTRATION | FIELD SURVEYS > FIELD SURVEYS | GEOGRAPHIC REGION > POLAR | ICE CORING SURVEY | SEA ICE ALGAE | climatologyMeteorologyAtmosphere | oceans |

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Download the dataset. (GET DATA > DIRECT DOWNLOAD)

uri : https://data.aad.gov.au/eds/5944/download

Identifiers
  • global : AAS_4546_CapeEvans_SeaIce_2019
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