Estimation of thin Sea-ice thickness from NOAA AVHRR data in a polynya off the Wilkes Land coast, East Antarctica
Estimation of thin Sea-ice thickness from NOAA AVHRR data in a polynya off the Wilkes Land coast, East Antarctica
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根据 NOAA AVHRR 数据估算东南极洲威尔克斯陆地海岸附近冰间湖的薄海冰厚度
DOI：
10.3189/172756406781811745
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发表时间：
2006
影响因子：
2.9
通讯作者：
R. Massom
中科院分区：
文献类型：
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作者：
T. Tamura;K. Ohshima;H. Enomoto;K. Tateyama;A. Muto;S. Ushio;R. Massom
摘要南极海岸冰裂带是海洋-大气热湿通量强烈的主要区域，并伴随有大量的海冰产生和密集的水形成。因此，它们的准确探测，包括对薄冰厚度的估计，是非常重要的。在本文中，我们利用美国国家海洋和大气管理局（NOAA）先进甚高分辨率辐射计（AVHRR）数据和东南极洲威尔克斯地外文森斯湾多冰带的气象数据，将一种最初在北极开发的技术应用于估算海冰厚度。该方法基于利用卫星热红外数据估算的海冰表面温度以及全球客观分析（欧洲中期天气预报中心）数据进行的热通量计算。该方法的有效性通过与2003年澳大利亚主导的对该地区的研究巡航中获得的独立冰表面温度和冰厚度数据进行比较来评估。在薄冰（多冰区），利用AVHRR和ECMWF数据计算热通量估算的冰厚与(a)将热通量计算应用于现场辐射温度计和气象资料以及(b)现场观测估算的冰厚显示出合理的一致性。avhrr数据与实测数据之差的标准差为∽0.02 m。将AVHRR的海冰厚度反演结果与同步卫星无源微波极化比数据进行比较，证实了后者作为在不受黑暗和云层影响的更大尺度上推导薄海冰厚度图的潜力。
Abstract Antarctic coastal polynyas are major areas of intense ocean–atmosphere heat and moisture flux, and associated high Sea-ice production and dense-water formation. Their accurate detection, including an estimate of thin ice thickness, is therefore very important. In this paper, we apply a technique originally developed in the Arctic to an estimation of Sea-ice thickness using Us National Oceanic and Atmospheric Administration (NOAA) Advanced Very High Resolution Radiometer (AVHRR) data and meteorological data in the Vincennes Bay polynya off Wilkes Land, East Antarctica. The method is based upon the heat-flux calculation using Sea-ice Surface temperature estimates from the Satellite thermal-infrared data combined with global objective analysis (European Centre for Medium-Range Weather Forecasts (ECMWF)) data. The validity of this method is assessed by comparing results with independent ice-surface temperature and ice-thickness data obtained during an Australian-led research cruise to the region in 2003. In thin-ice (polynya) regions, ice thicknesses estimated by the heat-flux calculation using AVHRR and ECMWF data Show reasonable agreement with those estimated by (a) applying the heat-flux calculation to in Situ radiation thermometer and meteorological data and (b) in Situ observations. The Standard deviation of the difference between the AVHRR-derived and in Situ data is ∽0.02 m. Comparison of the AVHRR ice-thickness retrievals with coincident Satellite passive-microwave polarization ratio data confirms the potential of the latter as a means of deriving maps of thin Sea-ice thickness on the wider Scale, uninterrupted by darkness and cloud cover.
影响因子：
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作者：
T. Toyota;T. Kawamura;K. Ohshima;H. Shimoda;M. Wakatsuchi
通讯作者：
T. Toyota;T. Kawamura;K. Ohshima;H. Shimoda;M. Wakatsuchi