Antarctic Circumnavigation Expedition 2017: HOSM data product
Nans in the reconstructed surfaces indicate numerical instability. Files containing Nans should be disregarded. Reconstructed nonlinear surface from WAMOS (marine radar) data collected during the 3rd leg of Antarctic Circumnavigation Expedition, from the end of January to the end of March 2017. WAMO...
Other Authors: | , |
---|---|
Format: | Dataset |
Language: | unknown |
Published: |
Australian Ocean Data Network
|
Subjects: | |
Online Access: | https://researchdata.ands.org.au/antarctic-circumnavigation-expedition-hosm-product/1340757 https://data.aad.gov.au/metadata/records/AAS_4434_ACE_HOSM https://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4434_ACE_HOSM http://data.aad.gov.au/eds/4729/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=AAS_4434 |
id |
ftands:oai:ands.org.au::1340757 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
oceans OCEAN WAVES EARTH SCIENCE WAVE SPECTRA SEA STATE WAVE HEIGHT HOSM NONLINEAR WAVES NUMERICAL SIMULATIONS Computer > Computer SHIPS R/V AKADEMIK TRESHNIKOV AMD/AU AMD CEOS GEOGRAPHIC REGION > POLAR OCEAN > SOUTHERN OCEAN |
spellingShingle |
oceans OCEAN WAVES EARTH SCIENCE WAVE SPECTRA SEA STATE WAVE HEIGHT HOSM NONLINEAR WAVES NUMERICAL SIMULATIONS Computer > Computer SHIPS R/V AKADEMIK TRESHNIKOV AMD/AU AMD CEOS GEOGRAPHIC REGION > POLAR OCEAN > SOUTHERN OCEAN Antarctic Circumnavigation Expedition 2017: HOSM data product |
topic_facet |
oceans OCEAN WAVES EARTH SCIENCE WAVE SPECTRA SEA STATE WAVE HEIGHT HOSM NONLINEAR WAVES NUMERICAL SIMULATIONS Computer > Computer SHIPS R/V AKADEMIK TRESHNIKOV AMD/AU AMD CEOS GEOGRAPHIC REGION > POLAR OCEAN > SOUTHERN OCEAN |
description |
Nans in the reconstructed surfaces indicate numerical instability. Files containing Nans should be disregarded. Reconstructed nonlinear surface from WAMOS (marine radar) data collected during the 3rd leg of Antarctic Circumnavigation Expedition, from the end of January to the end of March 2017. WAMOS data (AAS_4434_ACE_WAMOS) are processed with the Higher Order Spectral Method (HOSM) to provide the nonlinear surface elevation and the corresponding spectrum of waves during ACE. A Montecarlo approach is adopted to reproduce the natural variability of the sea state and gain reliable statistics of the underlying nonlinear surface elevation. Details on the method can be found on Toffoli, Alessandro, et al. "Evolution of weakly nonlinear random directional waves: laboratory experiments and numerical simulations." Journal of Fluid Mechanics 664 (2010): 313-336. File structure: Folder name corresponds to the time stamp of the input spectrum (yyyyMMddhhmmss) from AAS_4434_ACE_WAMOS. Each folder contains: 1. The surface elevation for 250 random realisations at 10 instant in times from initialisation saved every 5 dominant wave periods apart (0,5,10,15,…,50 Tp). The ten digits name is structured as 0000NRRttt where NRR is the number of the random realisation (from 1 to 250) and ttt denotes the time index (from 0 to 10). 2. NEW_SPECTRUM.DAT the 2D spectrum (64x64) as a columnar vector of the initial spectrum read from the AAS_4434_ACE_WAMOS. 3. INPUT_SPECTRUM.DAT the 2D spectrum (256x256) as a columnar vector of the initial spectrum for the HOSM. 4. WAVENUMBERSX.DAT and WAVENUMBERSY.DAT the wavenumber in x and y respectively 5. PP_INFO.DAT contains the peak period (Tp) in seconds 6. RUN_INFO.DAT contains the resolution in x of the WAMOS spectrum (64), the resolution in y of the WAMOS spectrum (64), the delta x for the surface elevation in m, the delta y for the surface elevation in m. Subsequent parameters are flags for the HOSM method. Waves in the Southern Ocean are the biggest on the planet. They exert extreme stresses on the coastline of the Sub-Antarctic Islands, which affects coastal morphology and the delicate natural environment that the coastline offers. In Antarctic waters, the sea ice cover reflects a large proportion of the wave energy, creating a complicated sea state close to the ice edge. The remaining proportion of the wave energy penetrates deep into the ice-covered ocean and breaks the ice into relatively small floes. Then, the waves herd the floes and cause them to collide and raft. There is a lack of field data in the Sub-Antarctic and Antarctic Oceans. Thus, wave models are not well calibrated and perform poorly in these regions. Uncertainties relate to the difficulties to model the strong interactions between waves and currents (the Antarctic Circumpolar and tidal currents) and between waves and ice (reflected waves modify the incident field and ice floes affect transmission into the ice-covered ocean). Drawbacks in wave modelling undermine our understanding and ability to protect this delicate ocean and coastal environment. The assessment of metocean conditions in the Southern Oceans |
author2 |
AADC (originator) AU/AADC > Australian Antarctic Data Centre, Australia (resourceProvider) |
format |
Dataset |
title |
Antarctic Circumnavigation Expedition 2017: HOSM data product |
title_short |
Antarctic Circumnavigation Expedition 2017: HOSM data product |
title_full |
Antarctic Circumnavigation Expedition 2017: HOSM data product |
title_fullStr |
Antarctic Circumnavigation Expedition 2017: HOSM data product |
title_full_unstemmed |
Antarctic Circumnavigation Expedition 2017: HOSM data product |
title_sort |
antarctic circumnavigation expedition 2017: hosm data product |
publisher |
Australian Ocean Data Network |
url |
https://researchdata.ands.org.au/antarctic-circumnavigation-expedition-hosm-product/1340757 https://data.aad.gov.au/metadata/records/AAS_4434_ACE_HOSM https://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4434_ACE_HOSM http://data.aad.gov.au/eds/4729/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=AAS_4434 |
op_coverage |
Spatial: northlimit=-45; southlimit=-70; westlimit=-180; eastLimit=180 Temporal: From 2017-01-22 to 2017-03-18 |
long_lat |
ENVELOPE(-180,180,-45,-70) |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_source |
https://data.aad.gov.au |
op_relation |
https://researchdata.ands.org.au/antarctic-circumnavigation-expedition-hosm-product/1340757 281d1f4d-0171-48a5-8b98-f4c0cd83e25d https://data.aad.gov.au/metadata/records/AAS_4434_ACE_HOSM https://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4434_ACE_HOSM http://data.aad.gov.au/eds/4729/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=AAS_4434 |
_version_ |
1766247704825954304 |
spelling |
ftands:oai:ands.org.au::1340757 2023-05-15T13:47:42+02:00 Antarctic Circumnavigation Expedition 2017: HOSM data product AADC (originator) AU/AADC > Australian Antarctic Data Centre, Australia (resourceProvider) Spatial: northlimit=-45; southlimit=-70; westlimit=-180; eastLimit=180 Temporal: From 2017-01-22 to 2017-03-18 https://researchdata.ands.org.au/antarctic-circumnavigation-expedition-hosm-product/1340757 https://data.aad.gov.au/metadata/records/AAS_4434_ACE_HOSM https://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4434_ACE_HOSM http://data.aad.gov.au/eds/4729/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=AAS_4434 unknown Australian Ocean Data Network https://researchdata.ands.org.au/antarctic-circumnavigation-expedition-hosm-product/1340757 281d1f4d-0171-48a5-8b98-f4c0cd83e25d https://data.aad.gov.au/metadata/records/AAS_4434_ACE_HOSM https://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAS_4434_ACE_HOSM http://data.aad.gov.au/eds/4729/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=AAS_4434 https://data.aad.gov.au oceans OCEAN WAVES EARTH SCIENCE WAVE SPECTRA SEA STATE WAVE HEIGHT HOSM NONLINEAR WAVES NUMERICAL SIMULATIONS Computer > Computer SHIPS R/V AKADEMIK TRESHNIKOV AMD/AU AMD CEOS GEOGRAPHIC REGION > POLAR OCEAN > SOUTHERN OCEAN dataset ftands 2020-01-05T22:02:50Z Nans in the reconstructed surfaces indicate numerical instability. Files containing Nans should be disregarded. Reconstructed nonlinear surface from WAMOS (marine radar) data collected during the 3rd leg of Antarctic Circumnavigation Expedition, from the end of January to the end of March 2017. WAMOS data (AAS_4434_ACE_WAMOS) are processed with the Higher Order Spectral Method (HOSM) to provide the nonlinear surface elevation and the corresponding spectrum of waves during ACE. A Montecarlo approach is adopted to reproduce the natural variability of the sea state and gain reliable statistics of the underlying nonlinear surface elevation. Details on the method can be found on Toffoli, Alessandro, et al. "Evolution of weakly nonlinear random directional waves: laboratory experiments and numerical simulations." Journal of Fluid Mechanics 664 (2010): 313-336. File structure: Folder name corresponds to the time stamp of the input spectrum (yyyyMMddhhmmss) from AAS_4434_ACE_WAMOS. Each folder contains: 1. The surface elevation for 250 random realisations at 10 instant in times from initialisation saved every 5 dominant wave periods apart (0,5,10,15,…,50 Tp). The ten digits name is structured as 0000NRRttt where NRR is the number of the random realisation (from 1 to 250) and ttt denotes the time index (from 0 to 10). 2. NEW_SPECTRUM.DAT the 2D spectrum (64x64) as a columnar vector of the initial spectrum read from the AAS_4434_ACE_WAMOS. 3. INPUT_SPECTRUM.DAT the 2D spectrum (256x256) as a columnar vector of the initial spectrum for the HOSM. 4. WAVENUMBERSX.DAT and WAVENUMBERSY.DAT the wavenumber in x and y respectively 5. PP_INFO.DAT contains the peak period (Tp) in seconds 6. RUN_INFO.DAT contains the resolution in x of the WAMOS spectrum (64), the resolution in y of the WAMOS spectrum (64), the delta x for the surface elevation in m, the delta y for the surface elevation in m. Subsequent parameters are flags for the HOSM method. Waves in the Southern Ocean are the biggest on the planet. They exert extreme stresses on the coastline of the Sub-Antarctic Islands, which affects coastal morphology and the delicate natural environment that the coastline offers. In Antarctic waters, the sea ice cover reflects a large proportion of the wave energy, creating a complicated sea state close to the ice edge. The remaining proportion of the wave energy penetrates deep into the ice-covered ocean and breaks the ice into relatively small floes. Then, the waves herd the floes and cause them to collide and raft. There is a lack of field data in the Sub-Antarctic and Antarctic Oceans. Thus, wave models are not well calibrated and perform poorly in these regions. Uncertainties relate to the difficulties to model the strong interactions between waves and currents (the Antarctic Circumpolar and tidal currents) and between waves and ice (reflected waves modify the incident field and ice floes affect transmission into the ice-covered ocean). Drawbacks in wave modelling undermine our understanding and ability to protect this delicate ocean and coastal environment. The assessment of metocean conditions in the Southern Oceans Dataset Antarc* Antarctic Sea ice Southern Ocean Research Data Australia (Australian National Data Service - ANDS) Antarctic Southern Ocean The Antarctic ENVELOPE(-180,180,-45,-70) |