| ZHANG Zehua,BI Haibo,SUN Ke,HUANG Haijun,LIU Yanxia,YAN Liwen. 2017. Arctic sea ice volume export through the Fram Strait from combined satellite and model data: 1979-2012. Acta Oceanologica Sinica, 36(1):44－55 |
| Arctic sea ice volume export through the Fram Strait from combined satellite and model data: 1979-2012 |
| 基于卫星遥感观测和模型数据的北极弗拉姆海峡海冰体积输出通量研究(1979-2012) |
| Received:November 19, 2015 Revised:April 18, 2016 |
| DOI：10.1007/s13131-017-0992-4 |
| Key words:sea ice volume flux remote sensing PIOMAS Fram Strait |
| 中文关键词: 海冰体积通量 遥感 PIOMAS模型 弗拉姆海峡 |
| 基金项目:The National Natural Science Foundation of China under contract No. 41406215; the Foundation of Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Postdoctoral Science Foundation of China under contract No. 2014M561971; the Open fund for the Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences under contract No. MGE2013KG07. |
| Author Name | Affiliation | E-mail | | ZHANG Zehua | The Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
University of Chinese Academy of Sciences, Beijing 100049, China | | | BI Haibo | The Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China | bhb@qdio.ac.cn | | SUN Ke | The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | | | HUANG Haijun | The Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China | | | LIU Yanxia | The Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China | | | YAN Liwen | The Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China | |
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| Abstract: |
| By combing satellite-derived ice motion and concentration with ice thickness fields from a popular model PIOMAS we obtain the estimates of ice volume flux passing the Fram Strait over the 1979-2012 period. Since current satellite and field observations for sea ice thickness are limited in time and space, the use of PIOMAS is expected to fill the gap by providing temporally continued ice thickness fields. Calculated monthly volume flux exhibits a prominent annual cycle with the peak record in March (roughly 145 km3/month) and the trough in August (10 km3/month). Annual ice volume flux (1 132 km3) is primarily attributable to winter (October through May) outflow (approximately 92%). Uncertainty in annual ice volume export is estimated to be 55 km3 (or 5.7%). Our results also verified the extremely large volume flux appearing between late 1980s and mid-1990s. Nevertheless, no clear trend was found in our volume flux results. Ice motion is the primary factor in the determination of behavior of volume flux. Ice thickness presented a general decline trend may partly enhance or weaken the volume flux trend. Ice concentration exerted the least influences on modulating trends and variability in volume flux. Moreover, the linkage between winter ice volume flux and three established Arctic atmospheric schemes were examined. Compared to NAO, the DA and EOF3 mechanism explains a larger part of variations of ice volume flux across the strait. |
| 中文摘要: |
| 通过卫星遥感提取出的海冰运动及密集度数据与通用的PIOMAS模型得到的厚度场数据相结合，我们估算了1979-2012年之间通过弗拉姆海峡的海冰体积输出通量。由于目前的卫星遥感和野外观测获取的海冰厚度存在时间和空间上的限制，应用PIOMAS模型得出的日海冰厚度场将填补这种数据空缺。月海冰体积通量数据显示出了一种显著的年度循环模式，其在三月份达到峰值（约145 km3/month）并在八月份达到低谷（10 km3/month）。年度海冰体积通量（1132 km3）主要归因于冬季（十月到次年五月）的流出量（约占92%）。年度海冰体积输出通量的误差估算值为55km3（或5.7%）。我们的结果也显示出海冰体积通量显著的年际变化，在80年代后期到90年代中期存在海冰体积通量的极大值。然而，本文研究结果未发现明显的变化趋势。合成海表气压数据分析表明海冰输出异常与北大西洋波动（North Atlantic Oscillation,NAO）和冬夏两季偶极震荡（Dipole Anomaly,DA）有关。此外，我们还研究了冬季海冰体积通量与三种确定的北极大气活动机制的关联。与DA和EOF3相比，NAO机制解释了通过海峡的海冰体积通量的大部分变化。然而，这三种大气层模式都揭示出与弗拉姆海峡海冰输出一种逐渐减弱的相关性。对可能影响弗拉姆海峡海冰运动的新的大气层模式的进一步研究是十分必要的。 |
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