(Table 1) Ice floe size and other characteristics during aerial observations in Prydz Bay, Antarctica
On the basis of aerial photographs of sea ice floes in the marginal ice zone (MIZ) of Prydz Bay acquired from December 2004 to February 2005 during the 21st Chinese National Antarctic Research Expedition, image processing techniques are employed to extract some geometric parameters of floes from two...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.815885 2023-05-15T13:49:51+02:00 (Table 1) Ice floe size and other characteristics during aerial observations in Prydz Bay, Antarctica Lu, P Li, Z J Zhang, Zhongshi Dong, X L MEDIAN LATITUDE: -69.200000 * MEDIAN LONGITUDE: 76.475000 * SOUTH-BOUND LATITUDE: -69.400000 * WEST-BOUND LONGITUDE: 76.350000 * NORTH-BOUND LATITUDE: -69.000000 * EAST-BOUND LONGITUDE: 76.600000 * DATE/TIME START: 2004-12-30T00:00:00 * DATE/TIME END: 2004-12-30T00:00:00 * MINIMUM ELEVATION: 0.0 m * MAXIMUM ELEVATION: 0.0 m 2008-06-20 text/tab-separated-values, 266 data points https://doi.pangaea.de/10.1594/PANGAEA.815885 https://doi.org/10.1594/PANGAEA.815885 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.815885 https://doi.org/10.1594/PANGAEA.815885 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Lu, P; Li, Z J; Zhang, Zhongshi; Dong, X L (2008): Aerial observations of floe size distribution in the marginal ice zone of summer Prydz Bay. Journal of Geophysical Research, 113(C2), C02011, https://doi.org/10.1029/2006JC003965 Aerial photography AERP Distance Event label Ice floe area perimeter Ice floe size mean Identification International Polar Year (2007-2008) IPY Mean caliper diameter (MCD) according to Rothrock & Thorndike (1984) Number Prydz_Bay-AOI1 Prydz_Bay-AOI2 Prydz Bay Ratio Roundness Standard deviation Dataset 2008 ftpangaea https://doi.org/10.1594/PANGAEA.815885 https://doi.org/10.1029/2006JC003965 2023-01-20T09:01:16Z On the basis of aerial photographs of sea ice floes in the marginal ice zone (MIZ) of Prydz Bay acquired from December 2004 to February 2005 during the 21st Chinese National Antarctic Research Expedition, image processing techniques are employed to extract some geometric parameters of floes from two merged transects covering the whole MIZ. Variations of these parameters with the distance into the MIZ are then obtained. Different parameters of floe size, namely area, perimeter, and mean caliper diameter (MCD), follow three similar stages of increasing, flat and increasing again, with distance from the open ocean. Floe shape parameters (roundness and the ratio of perimeter to MCD), however, have less significant variations than that of floe size. Then, to modify the deviation of the cumulative floe size distribution from the ideal power law, an upper truncated power-law function and a Weibull function are used, and four calculated parameters of the above functions are found to be important descriptors of the evolution of floe size distribution in the MIZ. Among them, Lr of the upper truncated power-law function indicates the upper limit of floe size and roughly equals the maximum floe size in each square sample area. L0 in the Weibull distribution shows an increasing proportion of larger floes in squares farther from the open ocean and roughly equals the mean floe size. D in the upper truncated power-law function is closely associated with the degree of confinement during ice breakup. Its decrease with the distance into MIZ indicates the weakening of confinement conditions on floes owing to wave attenuation. The gamma of the Weibull distribution characterizes the degree of homogeneity in a data set. It also decreases with distance into MIZ, implying that floe size distributes increase in range. Finally, a statistical test on floe size is performed to divide the whole MIZ into three distinct zones made up of floes of quite different characteristics. This zonal structure of floe size also agrees well with the trends ... Dataset Antarc* Antarctic Antarctica International Polar Year IPY Prydz Bay Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Prydz Bay ENVELOPE(76.350000,76.600000,-69.000000,-69.400000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Aerial photography AERP Distance Event label Ice floe area perimeter Ice floe size mean Identification International Polar Year (2007-2008) IPY Mean caliper diameter (MCD) according to Rothrock & Thorndike (1984) Number Prydz_Bay-AOI1 Prydz_Bay-AOI2 Prydz Bay Ratio Roundness Standard deviation |
spellingShingle |
Aerial photography AERP Distance Event label Ice floe area perimeter Ice floe size mean Identification International Polar Year (2007-2008) IPY Mean caliper diameter (MCD) according to Rothrock & Thorndike (1984) Number Prydz_Bay-AOI1 Prydz_Bay-AOI2 Prydz Bay Ratio Roundness Standard deviation Lu, P Li, Z J Zhang, Zhongshi Dong, X L (Table 1) Ice floe size and other characteristics during aerial observations in Prydz Bay, Antarctica |
topic_facet |
Aerial photography AERP Distance Event label Ice floe area perimeter Ice floe size mean Identification International Polar Year (2007-2008) IPY Mean caliper diameter (MCD) according to Rothrock & Thorndike (1984) Number Prydz_Bay-AOI1 Prydz_Bay-AOI2 Prydz Bay Ratio Roundness Standard deviation |
description |
On the basis of aerial photographs of sea ice floes in the marginal ice zone (MIZ) of Prydz Bay acquired from December 2004 to February 2005 during the 21st Chinese National Antarctic Research Expedition, image processing techniques are employed to extract some geometric parameters of floes from two merged transects covering the whole MIZ. Variations of these parameters with the distance into the MIZ are then obtained. Different parameters of floe size, namely area, perimeter, and mean caliper diameter (MCD), follow three similar stages of increasing, flat and increasing again, with distance from the open ocean. Floe shape parameters (roundness and the ratio of perimeter to MCD), however, have less significant variations than that of floe size. Then, to modify the deviation of the cumulative floe size distribution from the ideal power law, an upper truncated power-law function and a Weibull function are used, and four calculated parameters of the above functions are found to be important descriptors of the evolution of floe size distribution in the MIZ. Among them, Lr of the upper truncated power-law function indicates the upper limit of floe size and roughly equals the maximum floe size in each square sample area. L0 in the Weibull distribution shows an increasing proportion of larger floes in squares farther from the open ocean and roughly equals the mean floe size. D in the upper truncated power-law function is closely associated with the degree of confinement during ice breakup. Its decrease with the distance into MIZ indicates the weakening of confinement conditions on floes owing to wave attenuation. The gamma of the Weibull distribution characterizes the degree of homogeneity in a data set. It also decreases with distance into MIZ, implying that floe size distributes increase in range. Finally, a statistical test on floe size is performed to divide the whole MIZ into three distinct zones made up of floes of quite different characteristics. This zonal structure of floe size also agrees well with the trends ... |
format |
Dataset |
author |
Lu, P Li, Z J Zhang, Zhongshi Dong, X L |
author_facet |
Lu, P Li, Z J Zhang, Zhongshi Dong, X L |
author_sort |
Lu, P |
title |
(Table 1) Ice floe size and other characteristics during aerial observations in Prydz Bay, Antarctica |
title_short |
(Table 1) Ice floe size and other characteristics during aerial observations in Prydz Bay, Antarctica |
title_full |
(Table 1) Ice floe size and other characteristics during aerial observations in Prydz Bay, Antarctica |
title_fullStr |
(Table 1) Ice floe size and other characteristics during aerial observations in Prydz Bay, Antarctica |
title_full_unstemmed |
(Table 1) Ice floe size and other characteristics during aerial observations in Prydz Bay, Antarctica |
title_sort |
(table 1) ice floe size and other characteristics during aerial observations in prydz bay, antarctica |
publisher |
PANGAEA |
publishDate |
2008 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.815885 https://doi.org/10.1594/PANGAEA.815885 |
op_coverage |
MEDIAN LATITUDE: -69.200000 * MEDIAN LONGITUDE: 76.475000 * SOUTH-BOUND LATITUDE: -69.400000 * WEST-BOUND LONGITUDE: 76.350000 * NORTH-BOUND LATITUDE: -69.000000 * EAST-BOUND LONGITUDE: 76.600000 * DATE/TIME START: 2004-12-30T00:00:00 * DATE/TIME END: 2004-12-30T00:00:00 * MINIMUM ELEVATION: 0.0 m * MAXIMUM ELEVATION: 0.0 m |
long_lat |
ENVELOPE(76.350000,76.600000,-69.000000,-69.400000) |
geographic |
Antarctic Prydz Bay |
geographic_facet |
Antarctic Prydz Bay |
genre |
Antarc* Antarctic Antarctica International Polar Year IPY Prydz Bay Sea ice |
genre_facet |
Antarc* Antarctic Antarctica International Polar Year IPY Prydz Bay Sea ice |
op_source |
Supplement to: Lu, P; Li, Z J; Zhang, Zhongshi; Dong, X L (2008): Aerial observations of floe size distribution in the marginal ice zone of summer Prydz Bay. Journal of Geophysical Research, 113(C2), C02011, https://doi.org/10.1029/2006JC003965 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.815885 https://doi.org/10.1594/PANGAEA.815885 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.815885 https://doi.org/10.1029/2006JC003965 |
_version_ |
1766252410031833088 |