利用SCATSAT-1数据对D28冰山进行时空监测

IF 1.4 4区 环境科学与生态学 Q3 ECOLOGY Polar Record Pub Date : 2023-04-19 DOI:10.1017/S0032247423000062
Khoisnam Nanaoba Singh, M. Maisnam, R. Singh, J. Pallipad, A. Misra, S. Maity
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引用次数: 0

摘要

摘要对冰山及其运动的研究是散射仪数据在极地生态系统研究中的众多应用之一。SCATSAT-1是印度空间研究组织的Ku波段(13.515625 GHz)散射仪。使用SCATSAT-1的增强分辨率Gamma0H(水平偏振入射角归一化后向散射系数)数据,我们观察了D28冰山的运动及其在一年半的旅程中与风、洋流和海冰的相互作用(JD 2692019至JD 0512021)。使用的数据集如下:(1)SCATSAT-1 4级伽马0H;(2) 海洋表面流实时分析(OSCAR)三级分辨率海洋表面流;(3) ERA5的小时风速数据;4) NSIDC(国家冰雪数据中心)海冰浓度数据;和(5)NSIDC极地路径探测器每日EASE网格海冰运动矢量,版本-3。在这项研究中,我们将非洲大陆划分为五个不同的区域/部门。研究发现,在这些地区,不同尺度的风和洋流会影响冰山的轨迹。此外,海冰的运动也会改变冰山的走向。通过对冰山的屏幕数字化,发现冰山的平均面积约为1509.82平方公里,尺寸约为27公里×55.5公里。我们得出结论,可以从散射仪数据中确定冰山的空间和时间行为。
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Spatio-temporal monitoring of the iceberg D28 using SCATSAT-1 data
Abstract The study of the icebergs and their movements is one of many applications of scatterometer data in the study of the ecosystems of polar regions. SCATSAT-1 is the Indian Space Research Organisation’s (ISRO’s) Ku-band (13.515625 GHz) scatterometer. Using enhanced resolution Gamma0H (horizontally polarised incidence angle normalised backscattering coefficient) data of SCATSAT-1, we observed the movement of iceberg D28 and its interaction with wind, ocean currents and sea ice for one and a half years of its journey (JD 269, 2019 to JD 051, 2021). The data sets used are as follows: (1) SCATSAT-1 level-4 Gamma0H; (2) OSCAR (Ocean Surface Current Analysis Real-time) third-degree resolution ocean surface currents; (3) hourly wind speed data of ERA5; 4) NSIDC (National Snow and Ice Data Center) sea ice concentration data; and (5) NSIDC Polar Path-finder Daily EASE-Grid Sea Ice Motion Vectors, Version-3. For this study, we divide the continent into five different regions/sectors. It is found that the trajectory of the iceberg is influenced by the resultant of the wind and ocean current, at different scales in these regions. Moreover, sea ice motion can also change the course of iceberg. From the on-screen digitisation of the iceberg, the average area of the iceberg is found to be approximately 1509.82 km2 with approximate dimensions of 27 km × 55.5 km. We conclude that spatial and temporal behaviours of the iceberg can be ascertained from the scatterometer data.
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来源期刊
Polar Record
Polar Record 环境科学-环境科学
CiteScore
1.40
自引率
25.00%
发文量
26
审稿时长
>36 weeks
期刊介绍: Polar Record is an international, peer-reviewed scholarly periodical publishing results from a wide range of polar research areas. The journal covers original primary research papers in the humanities, social sciences, physical sciences, life sciences, and polar technology, as well as papers concerning current political, economic, legal, and environmental issues in the Arctic or Antarctic. Polar Record endeavours to provide rapid publication, normally within nine months of initial submission.
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