Estimation of Antarctic land-fast sea ice algal biomass and snow thickness from under-ice radiance spectra in two contrasting areas
Fast ice is an important component of Antarctic coastal marine ecosystems, providing a prolific habitat for ice algal communities. This work examines the relationships between normalized difference indices (NDI) calculated from under‐ice radiance measurements and sea ice algal biomass and snow thick...
Published in: | Journal of Geophysical Research: Oceans |
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Language: | English |
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Wiley-Blackwell Publishing, Inc.
2018
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Online Access: | https://eprints.utas.edu.au/28827/ https://eprints.utas.edu.au/28827/1/129186%20-%20Estimation%20of%20Antarctic%20land-fast%20sea%20ice%20algal%20biomass.pdf |
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ftunivtasmania:oai:eprints.utas.edu.au:28827 2023-05-15T13:31:53+02:00 Estimation of Antarctic land-fast sea ice algal biomass and snow thickness from under-ice radiance spectra in two contrasting areas Wongpan, P Meiners, KM Langhorne, PJ Heil, P Smith, IJ Leonard, GH Massom, RA Clementson, LA Haskell, TG 2018 application/pdf https://eprints.utas.edu.au/28827/ https://eprints.utas.edu.au/28827/1/129186%20-%20Estimation%20of%20Antarctic%20land-fast%20sea%20ice%20algal%20biomass.pdf en eng Wiley-Blackwell Publishing, Inc. https://eprints.utas.edu.au/28827/1/129186%20-%20Estimation%20of%20Antarctic%20land-fast%20sea%20ice%20algal%20biomass.pdf Wongpan, P, Meiners, KM, Langhorne, PJ, Heil, P, Smith, IJ, Leonard, GH, Massom, RA, Clementson, LA and Haskell, TG 2018 , 'Estimation of Antarctic land-fast sea ice algal biomass and snow thickness from under-ice radiance spectra in two contrasting areas' , Journal of Geophysical Research: Oceans, vol. 123, no. 3 , pp. 1907-1923 , doi:10.1002/2017JC013711 <http://dx.doi.org/10.1002/2017JC013711>. Antarctic landfast sea ice primary production snow thickness Article PeerReviewed 2018 ftunivtasmania https://doi.org/10.1002/2017JC013711 2021-09-20T22:17:01Z Fast ice is an important component of Antarctic coastal marine ecosystems, providing a prolific habitat for ice algal communities. This work examines the relationships between normalized difference indices (NDI) calculated from under‐ice radiance measurements and sea ice algal biomass and snow thickness for Antarctic fast ice. While this technique has been calibrated to assess biomass in Arctic fast ice and pack ice, as well as Antarctic pack ice, relationships are currently lacking for Antarctic fast ice characterized by bottom ice algae communities with high algal biomass. We analyze measurements along transects at two contrasting Antarctic fast ice sites in terms of platelet ice presence: near and distant from an ice shelf, i.e., in McMurdo Sound and off Davis Station, respectively. Snow and ice thickness, and ice salinity and temperature measurements support our paired in situ optical and biological measurements. Analyses show that NDI wavelength pairs near the first chlorophyll a (chl a) absorption peak (≈440 nm) explain up to 70% of the total variability in algal biomass. Eighty‐eight percent of snow thickness variability is explained using an NDI with a wavelength pair of 648 and 567 nm. Accounting for pigment packaging effects by including the ratio of chl a‐specific absorption coefficients improved the NDI‐based algal biomass estimation only slightly. Our new observation‐based algorithms can be used to estimate Antarctic fast ice algal biomass and snow thickness noninvasively, for example, by using moored sensors (time series) or mapping their spatial distributions using underwater vehicles. Article in Journal/Newspaper Antarc* Antarctic Arctic ice algae Ice Shelf McMurdo Sound Sea ice University of Tasmania: UTas ePrints Antarctic Arctic Davis Station ENVELOPE(77.968,77.968,-68.576,-68.576) Davis-Station ENVELOPE(77.968,77.968,-68.576,-68.576) McMurdo Sound Journal of Geophysical Research: Oceans 123 3 1907 1923 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
Antarctic landfast sea ice primary production snow thickness |
spellingShingle |
Antarctic landfast sea ice primary production snow thickness Wongpan, P Meiners, KM Langhorne, PJ Heil, P Smith, IJ Leonard, GH Massom, RA Clementson, LA Haskell, TG Estimation of Antarctic land-fast sea ice algal biomass and snow thickness from under-ice radiance spectra in two contrasting areas |
topic_facet |
Antarctic landfast sea ice primary production snow thickness |
description |
Fast ice is an important component of Antarctic coastal marine ecosystems, providing a prolific habitat for ice algal communities. This work examines the relationships between normalized difference indices (NDI) calculated from under‐ice radiance measurements and sea ice algal biomass and snow thickness for Antarctic fast ice. While this technique has been calibrated to assess biomass in Arctic fast ice and pack ice, as well as Antarctic pack ice, relationships are currently lacking for Antarctic fast ice characterized by bottom ice algae communities with high algal biomass. We analyze measurements along transects at two contrasting Antarctic fast ice sites in terms of platelet ice presence: near and distant from an ice shelf, i.e., in McMurdo Sound and off Davis Station, respectively. Snow and ice thickness, and ice salinity and temperature measurements support our paired in situ optical and biological measurements. Analyses show that NDI wavelength pairs near the first chlorophyll a (chl a) absorption peak (≈440 nm) explain up to 70% of the total variability in algal biomass. Eighty‐eight percent of snow thickness variability is explained using an NDI with a wavelength pair of 648 and 567 nm. Accounting for pigment packaging effects by including the ratio of chl a‐specific absorption coefficients improved the NDI‐based algal biomass estimation only slightly. Our new observation‐based algorithms can be used to estimate Antarctic fast ice algal biomass and snow thickness noninvasively, for example, by using moored sensors (time series) or mapping their spatial distributions using underwater vehicles. |
format |
Article in Journal/Newspaper |
author |
Wongpan, P Meiners, KM Langhorne, PJ Heil, P Smith, IJ Leonard, GH Massom, RA Clementson, LA Haskell, TG |
author_facet |
Wongpan, P Meiners, KM Langhorne, PJ Heil, P Smith, IJ Leonard, GH Massom, RA Clementson, LA Haskell, TG |
author_sort |
Wongpan, P |
title |
Estimation of Antarctic land-fast sea ice algal biomass and snow thickness from under-ice radiance spectra in two contrasting areas |
title_short |
Estimation of Antarctic land-fast sea ice algal biomass and snow thickness from under-ice radiance spectra in two contrasting areas |
title_full |
Estimation of Antarctic land-fast sea ice algal biomass and snow thickness from under-ice radiance spectra in two contrasting areas |
title_fullStr |
Estimation of Antarctic land-fast sea ice algal biomass and snow thickness from under-ice radiance spectra in two contrasting areas |
title_full_unstemmed |
Estimation of Antarctic land-fast sea ice algal biomass and snow thickness from under-ice radiance spectra in two contrasting areas |
title_sort |
estimation of antarctic land-fast sea ice algal biomass and snow thickness from under-ice radiance spectra in two contrasting areas |
publisher |
Wiley-Blackwell Publishing, Inc. |
publishDate |
2018 |
url |
https://eprints.utas.edu.au/28827/ https://eprints.utas.edu.au/28827/1/129186%20-%20Estimation%20of%20Antarctic%20land-fast%20sea%20ice%20algal%20biomass.pdf |
long_lat |
ENVELOPE(77.968,77.968,-68.576,-68.576) ENVELOPE(77.968,77.968,-68.576,-68.576) |
geographic |
Antarctic Arctic Davis Station Davis-Station McMurdo Sound |
geographic_facet |
Antarctic Arctic Davis Station Davis-Station McMurdo Sound |
genre |
Antarc* Antarctic Arctic ice algae Ice Shelf McMurdo Sound Sea ice |
genre_facet |
Antarc* Antarctic Arctic ice algae Ice Shelf McMurdo Sound Sea ice |
op_relation |
https://eprints.utas.edu.au/28827/1/129186%20-%20Estimation%20of%20Antarctic%20land-fast%20sea%20ice%20algal%20biomass.pdf Wongpan, P, Meiners, KM, Langhorne, PJ, Heil, P, Smith, IJ, Leonard, GH, Massom, RA, Clementson, LA and Haskell, TG 2018 , 'Estimation of Antarctic land-fast sea ice algal biomass and snow thickness from under-ice radiance spectra in two contrasting areas' , Journal of Geophysical Research: Oceans, vol. 123, no. 3 , pp. 1907-1923 , doi:10.1002/2017JC013711 <http://dx.doi.org/10.1002/2017JC013711>. |
op_doi |
https://doi.org/10.1002/2017JC013711 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
123 |
container_issue |
3 |
container_start_page |
1907 |
op_container_end_page |
1923 |
_version_ |
1766022009264799744 |