Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data, Version 1, Antarctic, 2014

This data set is generated from brightness temperature data and is designed to provide a consistent time series of sea ice concentrations spanning the coverage of several passive microwave instruments.The data are provided in the polar stereographic projection at a grid cell size of 25 x 25 km.
This product is designed to provide a consistent time series of sea ice concentrations (the fraction, or percentage, of ocean area covered by sea ice) spanning the coverage of several passive microwave instruments. To aid in this goal, sea ice algorithm coefficients are changed to reduce differences in sea ice extent and area as estimated using the SMMR and SSM/I sensors.

本数据集基于亮温数据生成，旨在提供覆盖多款被动微波仪器（passive microwave instruments）观测范围的海冰密集度（sea ice concentrations）一致性时间序列。数据采用极地方位投影（polar stereographic projection）格式存储，网格分辨率为25×25千米。
本产品旨在提供覆盖多款被动微波仪器观测范围的海冰密集度一致性时间序列，其中海冰密集度指海洋被海冰覆盖的占比或百分比。为达成这一目标，研究人员调整了海冰反演算法的系数，以降低使用SMMR与SSM/I传感器估算得到的海冰范围与面积之间的差异。