C-Band Backscatter Measurements of Winter Sea-Ice in the Weddell Sea, Antarctica
C-Band Backscatter Measurements of Winter Sea-Ice in the Weddell Sea, Antarctica
复制标题
南极洲威德尔海冬季海冰的 C 波段后向散射测量
DOI：
10.1080/01431169508954635
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发表时间：
1995
影响因子：
3.4
通讯作者：
Prasad Gogineni
中科院分区：
文献类型：
--
作者：
M. Drinkwater;R. Hosseinmostafa;Prasad Gogineni
摘要在1992年冬季威德尔环流研究中，使用了德国北极星号破冰船上的C波段定标器，获得了南极海冰的详细船载测量扫描。调频连续波（FM-CW）雷达工作频率为4·3GHz，在10 ° ~ 75°的入射角范围内获得了同极化（VV）和交叉极化（HV）数据。在破冰船穿越威德尔海时，记录了几种冰的校准后向散射数据，并详细测量了每个测量点相应的雪和海冰特性，以及气象信息、辐射收支和海洋学数据。在寒冷的冬季条件下的主要散射贡献来自空气/雪和雪/冰界面。观测结果表明，北极海冰散射签名的一些相似之处，虽然主要的区别是一般较低的平均后向散射系数在威德尔海。这是由于年轻的平均冰河期和厚度。
Abstract During the 1992 Winter Weddell Gyre Study, a C-band scalterometer was used from the German ice-breaker R/V Polarstern to obtain detailed shipborne measurement scans of Antarctic sea-ice. The frequency-modulated continuous-wave (FM-CW) radar operated at 4·3GHz and acquired like- (VV) and cross-polarization (HV) data at a variety of incidence angles (10–75°). Calibrated backscatter data were recorded for several ice types as the icebreaker crossed the Weddell Sea and detailed measurements were made of corresponding snow and sea-ice characteristics at each measurement site, together with meteorological information, radiation budget and oceanographic data. The primary scattering contributions under cold winter conditions arise from the air/snow and snow/ice interfaces. Observations indicate some similarities with Arctic sea-ice scattering signatures, although the main difference is generally lower mean backscattering coefficients in the Weddell Sea. This is due to the younger mean ice age and thickne...