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Remote Sensing Technology and Application  2019, Vol. 34 Issue (6): 1162-1172    DOI: 10.11873/j.issn.1004-0323.2019.6.1162
    
Spatiotemporal Variation of Sea Ice Concentration in Important Arctic Straits is Heterogeneous
Tianyuan Zhang1,2(),Jixia Huang1,3(),Yunfeng Cao1,Li Wang3,Yuhan Sun1,Linsheng Yang3
1.Beijing key Laboratory of Precision Forestry, Beijing Forestry University, Beijing 100083, China
2.State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China
3.Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
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Abstract  

In the context of global warming, the area and thickness of Arctic sea ice is gradually decreasing, which provides the possibility for Arctic navigation. As an important transportation hub of sea transportation, the Arctic Strait has a direct impact on the opening of the Arctic Channel. In this study, the sea ice density in the Northeast Passage and the Northwest Passage of the Arctic region in recent 35 years was used as the research object, and the sea ice concentration was clustered by using Kernel K-means clustering. The trend of time series of sea ice intensity under different clustering models is analyzed by Empirical Mode Decomposition (EMD), and the heterogeneity of ice regime changes in important straits is explored. Then taking the summer melting ice age as the study period, the cluster and heterogeneity analysis were carried out, and the following conclusions were drawn: ①The sea ice concentration of 14 straits in the North Pole showed three spatio-temporal clustering models. The variation of sea ice concentration in the same clustering model has strong consistency, and the variation of sea ice concentration is quite different among different models. All the straits with low sea ice concentration are in the Northeast Passage. ②The sea ice density of the other straits except the Bering Strait and the Dimitri Laptev Strait shows a decreasing trend in the whole year. The two straits with a decreasing trend are the straits with low sea ice concentration. ③The variation trends of sea ice concentration in each strait during the summer melting ice period are various. in addition to the simple increasing and decreasing trends, there are also various fluctuating trends, including the U-shape trend.

Key words:  Arctic      Sea ice density      Straits      Empirical Mode Decomposition      Kernel K-means clustering     
Received:  30 July 2018      Published:  23 March 2020
ZTFLH:  P343.6  
Corresponding Authors:  Jixia Huang     E-mail:  zty12396@126.com;huangjx@bjfu.edu.cn
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Tianyuan Zhang
Jixia Huang
Yunfeng Cao
Li Wang
Yuhan Sun
Linsheng Yang

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Tianyuan Zhang,Jixia Huang,Yunfeng Cao,Li Wang,Yuhan Sun,Linsheng Yang. Spatiotemporal Variation of Sea Ice Concentration in Important Arctic Straits is Heterogeneous. Remote Sensing Technology and Application, 2019, 34(6): 1162-1172.

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http://www.rsta.ac.cn/EN/10.11873/j.issn.1004-0323.2019.6.1162     OR     http://www.rsta.ac.cn/EN/Y2019/V34/I6/1162

所属航道中文名称英文名称经度纬度图1、2海峡代号
东北航道白令海峡Bering Strait169°00′W66°00′N1
桑尼科夫海峡Sannikov Strait140°00′E74°30′N2
德米特里拉普捷夫海峡Dmitry Laptev Strait142°00′E73°00′N3
维利基茨基海峡Vilkitsky Strait103°35′E77°57′N4
尤戈尔斯基沙尔海峡Yugorskiy Shar60°30′E69°45′N5
喀拉海峡Kara Strait58°00′E70°30′N6
西北航道维多利亚海峡Victoria Strait101°00′W69°00′N7
巴罗海峡Barrow Strait97°48′W74°23′N8
兰开斯特海峡Lancaster Sound84°00′W74°13′N9
麦克林托克海峡McClintock102°00′W72°00′N10
皮尔海峡Peel Sound96°30′W73°00′N11
麦克卢尔海峡M'clure Strait117°00′W74°42′N12
威尔士亲王海峡Prince of Wales Strait119°18′W72°15′N13
梅尔维尔子爵海峡Viscount Melville Sound105°00′W74°15′N14
Table 1  Coordinate Information of important Channel in Arctic region
Fig.1  Spatial and temporal clustering Model
海峡25%分位50%分位75%分位平均值标准差
维利基茨基海峡86.5097.2598.8886.4023.18
巴罗海峡90.0198.1799.4488.7122.27
麦克林托克海峡91.5597.9199.4589.4419.92
皮尔海峡94.1196.6798.4490.1517.60
麦克卢尔海峡95.3698.0099.3691.7418.15
梅尔维尔子爵海峡95.5597.9199.3692.5515.65
桑尼科夫海峡77.2497.9599.5979.4034.64
德米特里拉普捷夫海峡81.4097.0099.1381.3631.84
维多利亚海峡67.8897.4299.2577.3534.83
兰开斯特海峡43.1796.2199.3773.0335.07
威尔士亲王海峡66.7896.3398.5682.0025.87
白令海峡0.0020.9597.3845.2545.82
尤戈尔斯基沙尔海峡0.0076.3997.3657.2042.13
喀拉海峡0.0043.1593.6446.8940.82
Table 2  Mathematical characteristics of sea ice density in various straits
Fig.2  Distribution of sea ice concentration
Fig.3  EMD Time series decomposition trend under three different clustering models
Fig.4  Variation trend of sea ice density in the major straits of northeast channel in recent 35 years
Fig.5  Variation trend of sea ice density in the major straits of northwest channel in recent 35 years
Fig.6  Variation trend of sea ice density in the major straits of northeast channel in summer melt ice age in recent 35 years
Fig.7  Variation trend of sea ice density in the major straits of northwest channel in summer melt ice age in recent 35 years
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