1. School of Geospatial Engineering and Science, the Southern Marine Science and Engineering Guangdong Laboratory, and the Key Laboratory of Comprehensive Observation of Polar Environment, Ministry of Education, Sun Yat-sen University, Zhuhai, China
2. Science and Technology Branch, Environment and Climate Change Canada, Toronto, Canada
3. Norwegian Polar Institute, Fram Centre, Tromsø, Norway
4. Finnish Meteorological Institute, Helsinki, Finland