DOI: 10.5194/tc-10-1605-2016
Scopus记录号: 2-s2.0-84979996223
论文题名: Wave climate in the Arctic 1992-2014: Seasonality and trends
作者: Stopa J ; E ; , Ardhuin F ; , Girard-Ardhuin F
刊名: Cryosphere
ISSN: 19940416
出版年: 2016
卷: 10, 期: 4 起始页码: 1605
结束页码: 1629
语种: 英语
英文关键词: hindcasting
; marginal ice zone
; North Atlantic Oscillation
; Pacific Decadal Oscillation
; satellite altimetry
; sea ice
; seasonality
; wave climate
; wave height
; wind velocity
; Arctic
; Arctic Ocean
; Greenland Sea
; Norwegian Sea
英文摘要: Over the past decade, the diminishing Arctic sea ice has impacted the wave field, which depends on the ice-free ocean and wind. This study characterizes the wave climate in the Arctic spanning 1992-2014 from a merged altimeter data set and a wave hindcast that uses CFSR winds and ice concentrations from satellites as input. The model performs well, verified by the altimeters, and is relatively consistent for climate studies. The wave seasonality and extremes are linked to the ice coverage, wind strength, and wind direction, creating distinct features in the wind seas and swells. The altimeters and model show that the reduction of sea ice coverage causes increasing wave heights instead of the wind. However, trends are convoluted by interannual climate oscillations like the North Atlantic Oscillation (NAO) and Pacific Decadal Oscillation. In the Nordic Greenland Sea the NAO influences the decreasing wind speeds and wave heights. Swells are becoming more prevalent and wind-sea steepness is declining. The satellite data show the sea ice minimum occurs later in fall when the wind speeds increase. This creates more favorable conditions for wave development. Therefore we expect the ice freeze-up in fall to be the most critical season in the Arctic and small changes in ice cover, wind speeds, and wave heights can have large impacts to the evolution of the sea ice throughout the year. It is inconclusive how important wave-ice processes are within the climate system, but selected events suggest the importance of waves within the marginal ice zone. © Author(s) 2016. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75107
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Univ. Brest, CNRS, IRD, Ifremer, Laboratoire d'Océanographie Physique et Spatiale (LOPS), IUEM, Brest, France; École Centrale de Nantes, Nantes, France
Recommended Citation:
Stopa J,E,, Ardhuin F,et al. Wave climate in the Arctic 1992-2014: Seasonality and trends[J]. Cryosphere,2016-01-01,10(4)