@article{oai:nipr.repo.nii.ac.jp:00010169,
 author = {Kawaguchi, Yusuke and Hutchings, Jennifer K. and Kikuchi, Takashi and Morison, James H. and Krishfield, Richard A. and Kawaguchi, Yusuke and Hutchings, Jennifer K. and Kikuchi, Takashi and Morison, James H. and Krishfield, Richard A.},
 issue = {1},
 journal = {Polar science, Polar science},
 month = {Apr},
 note = {During the summer of 2010 ice concentration in the Eurasian Basin, Arctic Ocean was unusually low. This study examines the sea-ice reduction in the Eurasian Basin using ice-based autonomous buoy systems that collect temperature and salinity of seawater under the ice along the course of buoy drift. An array of GPS drifters was deployed with 10 miles radius around an ice-based profiler, enabling the quantitative discussion for mechanical ice divergence/convergence and its contribution to the sea-ice reduction. Oceanic heat fluxes to the ice estimated using buoy motion and mixed-layer (ML) temperature suggest significant spatial difference between fluxes under first-year and multi-year ice. In the former, the ML temperature reached 0.6 K above freezing temperature, providing >60-70 W m^<-2> of heat flux to the overlying ice, equivalent to about 1.5 m of ice melt over three months. In contrast, the multiyear ice region indicates nearly 40 W m^<-2> at most and cumulatively produced 0.8 m ice melt. The ice concentration was found to be reduced in association with an extensive low pressure system that persisted over the central Eurasian Basin. SSM/I indicates that ice concentration was reduced by 30-40% while the low pressure persisted. The low ice concentration persisted for 30 days even after the low dissipated. It appears that the wind-forced ice divergence led to enhanced absorption of incident solar energy in the expanded areas of open water and thus to increased ice melt., 北極海ユーラシア海盆において2010年夏は過去最少級の海氷密接度が観測された。我々は海氷設置型の水温・塩分プロファイラを用いた観測によって、ラプテフ海から移流してきた一年氷が海氷減少のもっとも顕著であった海盆中心部を占拠し、他の海域より高い水準の海氷融解を引き起こしていたことを示した。また、プロファイラ周辺に置かれたＧＰＳの運動を解析することで、融解期半ばに海氷運動が急激に大きくなる様子を捉えた。これは、海氷融解に伴い海洋表層にごく浅い強固な塩分成層ができたためと考えられる。この海氷運動の強化は、8月中旬に現れた低気圧による海氷発散を増幅し、露出海面部での太陽エネルギー吸収を促進することで当海域の海氷減少をさらに助長したものと考えられる。},
 pages = {39--53},
 title = {Anomalous sea-ice reduction in the Eurasian Basin of the Arctic Ocean during summer 2010},
 volume = {6},
 year = {2012}
}