Analysis of acoustic dot echo signature over an Antarctic ice shelf: the possible remote sensing of Antarctic petrels
Data from a monostatic acoustic radar operating at British Antarctic Survey's Halley station on a coastal Antarctic ice shelf show a band of small target echoes at an altitude of 700–1000 m during spring 1991. Statistical analysis of the echo signature show that the targets are spread more even...
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Cambridge University Press (CUP)
2002
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Online Access: | http://dx.doi.org/10.1017/s0954102002000755 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102002000755 |
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crcambridgeupr:10.1017/s0954102002000755 2024-03-03T08:38:54+00:00 Analysis of acoustic dot echo signature over an Antarctic ice shelf: the possible remote sensing of Antarctic petrels Anderson, Philip S. 2002 http://dx.doi.org/10.1017/s0954102002000755 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102002000755 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 14, issue 2, page 185-194 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2002 crcambridgeupr https://doi.org/10.1017/s0954102002000755 2024-02-08T08:26:44Z Data from a monostatic acoustic radar operating at British Antarctic Survey's Halley station on a coastal Antarctic ice shelf show a band of small target echoes at an altitude of 700–1000 m during spring 1991. Statistical analysis of the echo signature show that the targets are spread more evenly in the horizontal than would be expected for a random signature, whilst the local distribution in the vertical is Gaussian. Similar echo signatures have been observed previously, and are attributed to birds, bats or insects: the Antarctic data are also consistent with bird targets, but the case is not proven. No birds have been observed directly, but at 700 m they would be barely visible to the naked eye. The nearest nesting area with suitably large numbers of birds (Antarctic petrels, Thalassoica antarctica ) is a few hundred kilometres away. Estimates of velocity and target density imply that the Halley site would need to be specially favoured by the colony for their acoustic signature to be observed in such numbers, but such might be the case due to the presence of perennial coastal open water to the west of the station. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Antarctica Ice Shelf Thalassoica antarctica Cambridge University Press Antarctic The Antarctic Halley Station ENVELOPE(-26.541,-26.541,-75.581,-75.581) Antarctic Science 14 2 185 194 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Anderson, Philip S. Analysis of acoustic dot echo signature over an Antarctic ice shelf: the possible remote sensing of Antarctic petrels |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Data from a monostatic acoustic radar operating at British Antarctic Survey's Halley station on a coastal Antarctic ice shelf show a band of small target echoes at an altitude of 700–1000 m during spring 1991. Statistical analysis of the echo signature show that the targets are spread more evenly in the horizontal than would be expected for a random signature, whilst the local distribution in the vertical is Gaussian. Similar echo signatures have been observed previously, and are attributed to birds, bats or insects: the Antarctic data are also consistent with bird targets, but the case is not proven. No birds have been observed directly, but at 700 m they would be barely visible to the naked eye. The nearest nesting area with suitably large numbers of birds (Antarctic petrels, Thalassoica antarctica ) is a few hundred kilometres away. Estimates of velocity and target density imply that the Halley site would need to be specially favoured by the colony for their acoustic signature to be observed in such numbers, but such might be the case due to the presence of perennial coastal open water to the west of the station. |
format |
Article in Journal/Newspaper |
author |
Anderson, Philip S. |
author_facet |
Anderson, Philip S. |
author_sort |
Anderson, Philip S. |
title |
Analysis of acoustic dot echo signature over an Antarctic ice shelf: the possible remote sensing of Antarctic petrels |
title_short |
Analysis of acoustic dot echo signature over an Antarctic ice shelf: the possible remote sensing of Antarctic petrels |
title_full |
Analysis of acoustic dot echo signature over an Antarctic ice shelf: the possible remote sensing of Antarctic petrels |
title_fullStr |
Analysis of acoustic dot echo signature over an Antarctic ice shelf: the possible remote sensing of Antarctic petrels |
title_full_unstemmed |
Analysis of acoustic dot echo signature over an Antarctic ice shelf: the possible remote sensing of Antarctic petrels |
title_sort |
analysis of acoustic dot echo signature over an antarctic ice shelf: the possible remote sensing of antarctic petrels |
publisher |
Cambridge University Press (CUP) |
publishDate |
2002 |
url |
http://dx.doi.org/10.1017/s0954102002000755 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102002000755 |
long_lat |
ENVELOPE(-26.541,-26.541,-75.581,-75.581) |
geographic |
Antarctic The Antarctic Halley Station |
geographic_facet |
Antarctic The Antarctic Halley Station |
genre |
Antarc* Antarctic Antarctic Science Antarctica Ice Shelf Thalassoica antarctica |
genre_facet |
Antarc* Antarctic Antarctic Science Antarctica Ice Shelf Thalassoica antarctica |
op_source |
Antarctic Science volume 14, issue 2, page 185-194 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102002000755 |
container_title |
Antarctic Science |
container_volume |
14 |
container_issue |
2 |
container_start_page |
185 |
op_container_end_page |
194 |
_version_ |
1792507388488581120 |