ASI3 northern hemisphere swath brightness temperatures and gridded sea ice concentration ...

• Main Author: Lu, Junshen
• Format: Dataset
• Language: English
• Published: PANGAEA 2019
• Subjects: brightness temperatures; sea ice concentration; File name; File format; File size; Uniform resource locator/link to file; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.909683; https://doi.pangaea.de/10.1594/PANGAEA.909683

Since the launch of the AMSR series satellites in 2002, brightness temperatures are observed at 89 GHz with a much improved spatial resolution at about 5 km. Ice concentration retrieval using measurements at this frequency can therefore reveal more detailed features such as leads. Brightness temperatures at 89 GHz are however more prone to atmospheric and surface influences from water vapor, liquid water path, wind and surface temperature, which leads to erroneous sea ice retrieval. We improve an 89 GHz sea ice retrieval method, the ARTIST Sea Ice (ASI) algorithm, by correcting the observed brightness temperatures for atmospheric influences before they are input to the algorithm. A new retrieval algorithm named ASI3 is developed based on the weather corrected brightness temperatures and newly identified open water (80 K) and sea ice (14 K) tie points.The most influencing component of this correction scheme is including liquid clouds, the largest weather influence contributor. The correction is carried out by ...