Analysis of the changes and attributions of wave in the Arctic Ocean
Arctic sea waves are one of the important environmental factors in the Arctic region.In order to further understand the changes and attribution of sea waves in the Arctic sea area,this paper simulates the sea waves in the Arctic sea area from 1993 to 2021,using the wave numerical model WAVEWATCH-Ⅲ(WW3).The sea waves simulated by WW3 are validated with the OSTM/Jason-2 altimeter data.The comparison results show that the correlation(COR)is 0.93,and the RMSE is 0.63m.The simulation results are applicable for the wave analysis in the Arctic Ocean.The results show that:(1)Due to the higher average sea surface wind speed in winter compared to in summer,areas without sea ice can generate higher waves,resulting in significantly higher wave intensity in Arctic waters in winter.In summer,due to a decrease in the distribution of sea ice and an increase in ice layers with a thickness of less than 1m,wave propagation in ice free areas impacts thin ice areas,causing sea ice fragmentation,and also triggering wave activity in thinner sea areas,resulting in a wider range of wave activity than in winter.(2)There are periodic changes in the waves in the Arctic waters,but the overall wave height shows an upward trend at the annual average scale.The sea ice thickness and concentration distribution are opposite to the changes of sea waves,showing a downward trend.The greater the thickness and density of sea ice,the more it limits wave activities to a certain extent.At the same time,the main power source of wave activity in the Arctic waters is the sea surface wind field.
Arctic wavesWAVEWATCH-ⅢECMWF wind datasea ice data
NETL
NSTL
万方数据
