Analysis of Edge Length of Antarctic Sea Ice Time Series During 1978-2014

CHENG Zian; PANG Xiaoping; ZHAO Xi; JI Qing

doi:10.13203/j.whugis20150263

Volume 41 Issue 11

Nov. 2016

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Geomatics and Information Science of Wuhan University > 2016 > 41(11): 1463-1468. > DOI: 10.13203/j.whugis20150263

CHENG Zian, PANG Xiaoping, ZHAO Xi, JI Qing. Analysis of Edge Length of Antarctic Sea Ice Time Series During 1978-2014[J]. Geomatics and Information Science of Wuhan University, 2016, 41(11): 1463-1468. DOI: 10.13203/j.whugis20150263

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Analysis of Edge Length of Antarctic Sea Ice Time Series During 1978-2014

CHENG Zian^1,,
PANG Xiaoping^{1, 2},
ZHAO Xi^{1, 2, ,},
JI Qing¹

1.
Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China
2.
Key Laboratory of Polar Surveying and Mapping, National Administration of Surveying, Mapping and Geoinformation, Wuhan University, Wuhan 430079, China

Funds:

The National Natural Science Foundation of China 41576188

The National Natural Science Foundation of China 41301463

the Polar Environment Comprehensive Investigation and Assessment Programmes of China CHINARE2014-04-07

the Specialize Research Fund for the Doctoral Program of Higher Education of China 20130141120009

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Author Bio:
CHENG Zian: CHENG Zi'an, PhD candidate, specializes in cartography and sea ice remote sensing. E-mail: ziancheng@foxmail.com
Corresponding author:
ZHAO Xi, PhD, lecturer. E-mail: xi.zhao@whu.edu.cn
Received Date: March 03, 2016
Published Date: November 04, 2016

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Abstract

Based on SMMR and SSM/I sea ice index dataset, we analyzed a consistent 36-year edge length of Antarctic sea ice from 1978.11 to 2014.12. In this period, the edge length of Antarctic sea ice expanded at the speed of 19.54±16.31 km/a(p < 0.05). Based on this analysis, it can be inferred that the sea ice extent grows from March and declines from September every year. The sea ice edge length grows slowly from March to August, followed with a slow decline. It rapidly increases in November, reaches a peak in December and then quickly falls. Generally, the maximum value of sea ice edge length occurs in December, and the minimum value turns up in March. Sea ice edge length is related to both the sea ice extent and fractal dimension. The fractal dimension shows the same trend as the sea ice edge length in March, November, and December, when the periodic ice edge length displays a trend opposite to the ice extent. In other months, the ice edge length exhibits the same trend as the ice extent and opposite the Fractal dimension. In conclusion, the Indian Ocean and Ross Sea sectors show positive yearly trends; the Bellingshausen Sea sector shows a negative yearly trend; the other two sectors show no obvious trend. All the five sectors show no obvious trend most of the time.
- Antarctic sea ice,
- sea ice edge,
- time series

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