Data

ASPeCt bridge-based sea-ice observations – Ross Sea, Autumn 2025

Australian Antarctic Division
Stentella, M., Yongqing, C., He, H., Malyarenko, A. and Commonwealth of Australia ; COMMONWEALTH OF AUSTRALIA ; STENTELLA, MARTA
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.26179/sv7e-gz26&rft.title=ASPeCt bridge-based sea-ice observations – Ross Sea, Autumn 2025&rft.identifier=10.26179/sv7e-gz26&rft.publisher=Australian Antarctic Data Centre&rft.description=The Antarctic Sea ice Processes and Climate [ASPeCt] data sets submitted here have been collected systematically from the bridge of the Xue Long II, CHINARE icebreaker, while it transited through pack ice during the JTRES voyage in the autumn of 2025.Quantifiable observations of sea-ice thickness and related characteristics of the sea ice, snow, ocean and surface atmosphere were recorded hourly while the vessel moved through the sea-ice zone. When the vessel was stopped or had not moved at least 6nm since the previous observation, no observations were made. The observation protocol was endorsed by the Scientific Commission for Antarctic Research (under their ASPeCt EG programme) as the preferred method for conducting ship-based observations of sea-ice characteristics. Details can be found in Worby and Allison [1999].The relevant spreadsheets (csv file) contains the following information: Header name; Physical parameter; UnitYear; Year    Date; Day/Month/Year    Julian Day; Day of year    Time (UT); Time of day in Universal time: Hours/Minutes/Seconds    Lat (degrees N); Latitude; degrees NLon(degrees E); Longitude; degrees EConc; Total ice concentration; TenthOW; Open-water classification; See Worby and Allison [1999]c1; Ice concentration of primary ice category; Tenthty1; Ice type of primary ice category; See Worby and Allison [1999]iz1; Thickness of primary ice category; cmf1; Floe size of primary ice category; See Worby and Allison [1999]t1; Topography of primary ice category; See Worby and Allison [1999]s1; Snow type on primary ice category; See Worby and Allison [1999]sz1; Snow thickness on primary ice category; cmc2; Ice concentration of secondary ice category; Tenthty2; Ice type of secondary ice category; See Worby and Allison [1999]iz2; Thickness of secondary ice category; cmf2; Floe size of secondary ice category; See Worby and Allison [1999]t2; Topography of secondary ice category; See Worby and Allison [1999]s2; Snow type on secondary ice category; See Worby and Allison [1999]sz2; Snow thickness on secondary ice category; cmc3; Ice concentration of tertiary ice category; Tenthty3; Ice type of tertiary ice category; See Worby and Allison [1999]iz3; Thickness of tertiary ice category; cmf3; Floe size of tertiary ice category; See Worby and Allison [1999]t3; Topography of tertiary ice category; See Worby and Allison [1999]s3; Snow type on tertiary ice category; See Worby and Allison [1999]sz3; Snow thickness on tertiary ice category; cmSea; Sea-surface temperature; degrees CAir; Surface-air temperature; degrees CReference: Worby, A.P., and I. Allison, A Technique for Making Ship-Based Observations of Antarctic Sea Ice Thickness and Characteristics, PART I Observational Technique and Results, Antarctic CRC Report No. 14, ISBN: 1 875796 09 6, 1999.Progress Code: completedStatement: No problems encountered with data collection, and the data were were quality screened. The data file is compatible with the IceBox ASPeCt software.&rft.creator=Stentella, M., Yongqing, C., He, H., Malyarenko, A. and Commonwealth of Australia &rft.creator=COMMONWEALTH OF AUSTRALIA &rft.creator=STENTELLA, MARTA &rft.date=2025&rft.coverage=westlimit=145; southlimit=-77; eastlimit=-175; northlimit=-63&rft.coverage=westlimit=145; southlimit=-77; eastlimit=-175; northlimit=-63&rft_rights=These data are publicly available for download from the provided URL.&rft_rights=Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/legalcode&rft_rights=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_4625_ASPeCt_Ross_Sea_2025 when using these data.&rft_rights=This metadata record is publicly available.&rft_subject=climatologyMeteorologyAtmosphere&rft_subject=oceans&rft_subject=EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE EDGES&rft_subject=EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE EXTENT&rft_subject=EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE FLOES&rft_subject=EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE TYPES&rft_subject=EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE TEMPERATURE&rft_subject=EARTH SCIENCE > CRYOSPHERE > SEA ICE > PACK ICE&rft_subject=EARTH SCIENCE > CRYOSPHERE > SEA ICE > LEADS&rft_subject=EARTH SCIENCE > CRYOSPHERE > SEA ICE > SEA ICE CONCENTRATION&rft_subject=EARTH SCIENCE > CRYOSPHERE > SEA ICE > SNOW DEPTH&rft_subject=EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE > SURFACE TEMPERATURE > AIR TEMPERATURE&rft_subject=EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE DEPTH/THICKNESS&rft_subject=XUELONG II&rft_subject=ASPECT&rft_subject=VISUAL OBSERVATIONS > VISUAL OBSERVATIONS&rft_subject=TEMPERATURE SENSORS > TEMPERATURE SENSORS&rft_subject=R/V XUELONG&rft_subject=Ships&rft_subject=AMD/AU&rft_subject=CEOS&rft_subject=AMD&rft_subject=OCEAN > SOUTHERN OCEAN > ROSS SEA&rft_subject=CONTINENT > ANTARCTICA&rft_subject=GEOGRAPHIC REGION > POLAR&rft.type=dataset&rft.language=English Access the data
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Attribution 4.0 International (CC BY 4.0)
https://creativecommons.org/licenses/by/4.0/legalcode

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

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_4625_ASPeCt_Ross_Sea_2025 when using these data.

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Full description

The Antarctic Sea ice Processes and Climate [ASPeCt] data sets submitted here have been collected systematically from the bridge of the Xue Long II, CHINARE icebreaker, while it transited through pack ice during the JTRES voyage in the autumn of 2025.

Quantifiable observations of sea-ice thickness and related characteristics of the sea ice, snow, ocean and surface atmosphere were recorded hourly while the vessel moved through the sea-ice zone. When the vessel was stopped or had not moved at least 6nm since the previous observation, no observations were made. The observation protocol was endorsed by the Scientific Commission for Antarctic Research (under their ASPeCt EG programme) as the preferred method for conducting ship-based observations of sea-ice characteristics. Details can be found in Worby and Allison [1999].

The relevant spreadsheets (csv file) contains the following information:
Header name; Physical parameter; Unit
Year; Year    
Date; Day/Month/Year    
Julian Day; Day of year    
Time (UT); Time of day in Universal time: Hours/Minutes/Seconds    
Lat (degrees N); Latitude; degrees N
Lon(degrees E); Longitude; degrees E
Conc; Total ice concentration; Tenth
OW; Open-water classification; See Worby and Allison [1999]
c1; Ice concentration of primary ice category; Tenth
ty1; Ice type of primary ice category; See Worby and Allison [1999]
iz1; Thickness of primary ice category; cm
f1; Floe size of primary ice category; See Worby and Allison [1999]
t1; Topography of primary ice category; See Worby and Allison [1999]
s1; Snow type on primary ice category; See Worby and Allison [1999]
sz1; Snow thickness on primary ice category; cm
c2; Ice concentration of secondary ice category; Tenth
ty2; Ice type of secondary ice category; See Worby and Allison [1999]
iz2; Thickness of secondary ice category; cm
f2; Floe size of secondary ice category; See Worby and Allison [1999]
t2; Topography of secondary ice category; See Worby and Allison [1999]
s2; Snow type on secondary ice category; See Worby and Allison [1999]
sz2; Snow thickness on secondary ice category; cm
c3; Ice concentration of tertiary ice category; Tenth
ty3; Ice type of tertiary ice category; See Worby and Allison [1999]
iz3; Thickness of tertiary ice category; cm
f3; Floe size of tertiary ice category; See Worby and Allison [1999]
t3; Topography of tertiary ice category; See Worby and Allison [1999]
s3; Snow type on tertiary ice category; See Worby and Allison [1999]
sz3; Snow thickness on tertiary ice category; cm
Sea; Sea-surface temperature; degrees C
Air; Surface-air temperature; degrees C

Reference:
Worby, A.P., and I. Allison, A Technique for Making Ship-Based Observations of Antarctic Sea Ice Thickness and Characteristics, PART I Observational Technique and Results, Antarctic CRC Report No. 14, ISBN: 1 875796 09 6, 1999.

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Progress Code: completed
Statement: No problems encountered with data collection, and the data were were quality screened. The data file is compatible with the IceBox ASPeCt software.

Data time period: 2025-03-24 to 2025-04-19

This dataset is part of a larger collection

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-175,-63 -175,-77 145,-77 145,-63 -175,-63

-15,-70

text: westlimit=145; southlimit=-77; eastlimit=-175; northlimit=-63

Subjects
AMD | AMD/AU | ASPECT | CEOS | CONTINENT > ANTARCTICA | EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC TEMPERATURE > SURFACE TEMPERATURE > AIR TEMPERATURE | EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE DEPTH/THICKNESS | EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE EDGES | EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE EXTENT | EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE FLOES | EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE TEMPERATURE | EARTH SCIENCE > CRYOSPHERE > SEA ICE > ICE TYPES | EARTH SCIENCE > CRYOSPHERE > SEA ICE > LEADS | EARTH SCIENCE > CRYOSPHERE > SEA ICE > PACK ICE | EARTH SCIENCE > CRYOSPHERE > SEA ICE > SEA ICE CONCENTRATION | EARTH SCIENCE > CRYOSPHERE > SEA ICE > SNOW DEPTH | GEOGRAPHIC REGION > POLAR | OCEAN > SOUTHERN OCEAN > ROSS SEA | R/V XUELONG | Ships | TEMPERATURE SENSORS > TEMPERATURE SENSORS | VISUAL OBSERVATIONS > VISUAL OBSERVATIONS | XUELONG II | climatologyMeteorologyAtmosphere | oceans |

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Other Information
Download the dataset. (GET DATA > DIRECT DOWNLOAD)

url : https://data.aad.gov.au/eds/6119/download

Public information for AAS project AAS_4625 (PROJECT HOME PAGE)

url : https://projects.aad.gov.au/report_project_public.cfm?project_no=AAS_4625

Public information for AAS project AAS_4506 (PROJECT HOME PAGE)

url : https://projects.aad.gov.au/report_project_public.cfm?project_no=AAS_4506

Citation reference for this metadata record and dataset. (VIEW RELATED INFORMATION)

url : https://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4625_ASPeCt_Ross_Sea_2025

Identifiers
ACN 633 798 857