Radiance Calmer

Postdoctoral Scientist

About Radiance

Radiance Calmer is a postdoctoral researcher at NSIDC and at the Cooperative Institute for Research in Environmental Sciences (CIRES). After participating in the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition in 2020, she began analyzing the data to bring complementary information about the sea ice during the melting season, particularly focusing on albedo. Before concentrating on polar climate, Calmer studied atmospheric boundary layer and aerosol-cloud interactions. All her research projects use uncrewed aerial systems (UAS) to collect data from the atmosphere or the sea ice. She is also contributing to instrument development for UAS. Previous and current instrumentation projects are focused on wind measurements with multi-hole probes. She has acquired some expertise for field deployment of UAS in harsh conditions. Beyond concentrating on research, Calmer is currently leading, with three other early-career scientists, a discussion group on sustainability in science, and more specifically on how to improve sustainable practices in field work.


Polar climate, albedo, melt pond fraction, uncrewed aerial system (UAS or drone), wind measurements with multi-hole probe on UAS, atmospheric boundary layer, aerosol-cloud interactions, sustainability in field expeditions

Current Research

Uncrewed Aircraft measurements of surface albedo and melt pond fraction in the High Arctic during the melting season: Uncrewed aerial systems (UAS), commonly drones, are very flexible platforms that can be adapted to harsh conditions as in the Arctic region. UAS provides complementary information of the sea ice, bridging the altitude scale from more traditional surface, helicopter, and satellite-based observation methods. The different features of the sea ice during the melting season as bare ice, snow with sediments, melt ponds or open ocean present a wide range of albedo (ratio between reflected and incoming solar radiation). Ongoing work focuses on analyzing UAS data on albedo measurements and melt pond fraction. The HELiX UAS flights occurred during the 2020 summer months as part of the MOSAiC expedition. Source of support: NSF


Ph.D., Meteo-France, Centre National de Recherches Meteorologiques, Toulouse and Institut National Polytechnique de Toulouse, France, 2018
Master of Engineering, Institut National des Sciences Appliquees de Toulouse, France, 2013
Master of Research, Seoul National University, South Korea, 2012