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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >On the importance of leads in sea ice to the energy balance and ice formation in the Weddell Sea
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On the importance of leads in sea ice to the energy balance and ice formation in the Weddell Sea

机译：关于海冰中铅对韦德海能量平衡和冰形成的重要性

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For a considerable coverage the energy balance of and ice formation by leads in sea ice in the Weddell Sea are evaluated on the basis of data obtained from drifting buoys for the winter periods from 1986 to 1994 and by using a kinematic-thermodynamic sea ice model. The net heat flux is defined as the sum total of radiative and turbulent fluxes. For thin ice the net turbulent flux is 3-4 times the net radiative flux. The contribution of the net heat flux through open and refrozen leads to the total net heat flux through sea ice is twice as large as the area contribution of open and refrozen leads to the total area covered with sea ice. In the eastern and central parts of the Weddell Sea, leads contribute some 30% to the total energy flux from the ocean to the atmosphere. This flux increases from 10-15 W m(-2) in the eastern and central Weddell Sea regions to 30 W m(-2) in the western part of the Weddell Sea, where leads contribute more than 80% of the total net energy transfer. The increase is mainly due to the colder and windier atmosphere in connection with the higher variability of the ice motion in the diurnal and semidiurnal band in the western Weddell Sea. The contribution of leads in winter ice formation exceeds 50% in the whole of the Weddell Sea. Monthly area-weighted ice growth is 10-15 cm in the east and up to 30 cm over the western continental shelf region. In the western part of the Weddell. Sea, tidal and inertial motions in the diurnal and semidiurnal bands enhance lead formation, and thus contribute 7% to total net heat flux, 12% to ice formation, and 23% to the salt mass released during ice growth. The results are used to assess quantitatively the importance of leads to the interaction of the ocean, the sea ice, and the atmosphere. [References: 45]
机译：在相当大的覆盖范围内，根据1986年至1994年冬季从漂流浮标获得的数据并使用运动学-热力学海冰模型，评估了韦德尔海中海冰中铅的能量平衡和由冰形成的冰。净热通量定义为辐射和湍流的总和。对于稀冰，湍流净通量是辐射净通量的3-4倍。通过开放和再冷冻导致的净热通量对通过海冰的总净热通量的贡献是通过开放和再冷冻导致的被海冰覆盖的总面积的两倍。在韦德尔海的东部和中部，铅对从海洋到大气的总能量通量贡献约30％。这种通量从韦德海东部和中部地区的10-15 W m（-2）增加到韦德海西部的30 W m（-2），其中铅占总净能量的80％以上转让。增长主要是由于西部韦德海日和半日波段冰运动的较大变化所致的大气较冷和多风。在整个韦德尔海中，铅对冬季结冰的贡献超过50％。东部地区每月加权冰的生长量为10-15厘米，西部大陆架地区的最大面积为30厘米。在韦德尔的西部。日，半日带中的海，潮汐和惯性运动会增强铅的形成，从而对总净热通量贡献7％，对冰形成贡献12％，对冰生长过程中释放的盐量贡献23％。该结果用于定量评估导致海洋，海冰和大气相互作用的线索的重要性。 [参考：45]

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