Abstract:
Variations in Arctic sea ice are not only apparent in the extent and thickness but also in its inter nal properties.The microstructure of summer Arctic sea ice changes simultaneously due to vary ing external forcing,ice ageand extended melting seasons that affect its optical properties Thus, knowledge of the role ofinternal variations on the partitioning ofincident solar shortwave radiation within the ice and upper ocean is important.We investigated the sensitivity of the opti- cal properties of summer ice on ice microstructures.The results show that gas bubbles are the predominant scatterers within sea ice.Their effects on the scattering coefficient and ice albedo are 5 and 20 times stronger, respectively,than the effect of brine pockets
Sea ice cores sampled in the Pacific Sector of the Arctic during the summers of 2008 to 2016 were used to estimate the variations in the inherent optical properties(IOPs ofice and further effects on the radiation budget of sea iceThe modeled results reveal that variations in ice IOPs of different ice layers are different.These variations are related to the increasing air temperature and decreasing ice ages.At the Arctic basin scalethe changing OPs ofice greatly changed the amount of solar radiation transmitted to the upper ocean even when a constant ice thickness was assumed. especially in marginal ice zonesimplying different sea ice bottom melt.These find ings revealed the important role of the microstructure ofice in affecting the radiation budget of Arctic sea ice.
This work has been published:https://doi.org/103389/fmars2022.861994 Short-bio:
Miao YU is a PhD candidate from the Dalian University ofTechnology(Supervisor Peng LU) His research interests are the changes in sea ice on different scales and understanding the corre sponding physical processes. The recent study is focused on the effects of changing ice micro- structure on ice optical properties.
