DOI: 10.1007/s00382-016-3383-1
Scopus记录号: 2-s2.0-84991070844
论文题名: Linking atmospheric synoptic transport, cloud phase, surface energy fluxes, and sea-ice growth: observations of midwinter SHEBA conditions
作者: Persson P.O.G. ; Shupe M.D. ; Perovich D. ; Solomon A.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2017
卷: 49, 期: 4 起始页码: 1341
结束页码: 1364
语种: 英语
英文关键词: Arctic surface energy budget
; Atmospheric heat and moisture advection
; Mixed-phase Arctic clouds
; Radiative forcing
; Sea-ice growth
英文摘要: Observations from the Surface Heat Budget of the Arctic Ocean (SHEBA) project are used to describe a sequence of events linking midwinter long-range advection of atmospheric heat and moisture into the Arctic Basin, formation of supercooled liquid water clouds, enhancement of net surface energy fluxes through increased downwelling longwave radiation, and reduction in near-surface conductive heat flux loss due to a warming of the surface, thereby leading to a reduction in sea-ice bottom growth. The analyses provide details of two events during Jan. 1–12, 1998, one entering the Arctic through Fram Strait and the other from northeast Siberia; winter statistics extend the results. Both deep, precipitating frontal clouds and post-frontal stratocumulus clouds impact the surface radiation and energy budget. Cloud liquid water, occurring preferentially in stratocumulus clouds extending into the base of the inversion, provides the strongest impact on surface radiation and hence modulates the surface forcing, as found previously. The observations suggest a minimum water vapor threshold, likely case dependent, for producing liquid water clouds. Through responses to the radiative forcing and surface warming, this cloud liquid water also modulates the turbulent and conductive heat fluxes, and produces a thermal wave penetrating into the sea ice. About 20–33 % of the observed variations of bottom ice growth can be directly linked to variations in surface conductive heat flux, with retarded ice growth occurring several days after these moisture plumes reduce the surface conductive heat flux. This sequence of events modulate pack-ice wintertime environmental conditions and total ice growth, and has implications for the annual sea-ice evolution, especially for the current conditions of extensive thinner ice. © 2016, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53139
Appears in Collections: 过去全球变化的重建
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作者单位: Cooperative Institute for Research in Environmental Sciences, University of Colorado, Campus Box 216, Boulder, CO, United States; Earth System Research Laboratory, Physical Sciences Division, National Oceanographic and Atmospheric Administration, Boulder, CO, United States; Cold Regions Research and Engineering Laboratory, Hanover, NH, United States; Thayer School of Engineering, Dartmouth College, Hanover, NH, United States
Recommended Citation:
Persson P.O.G.,Shupe M.D.,Perovich D.,et al. Linking atmospheric synoptic transport, cloud phase, surface energy fluxes, and sea-ice growth: observations of midwinter SHEBA conditions[J]. Climate Dynamics,2017-01-01,49(4)