Antarctic Sea Ice Variability in the Southern Ocean-Climate System: A Workshop

NRC的一个特设委员会将举办一个讲习班，召集南极海冰专家，审查南大洋气候-海洋-海冰相互作用的当前科学，展望50年，重点是过去3年卫星感测观测的记录范围。这一年面积范围的增加与现有最佳气候模型的预测不一致，该预测表明海冰应该减少，以应对温室气体增加，平流层臭氧消耗和全球海洋变暖。这也与北极海冰显著减少的情况不一致。目前还不清楚为什么南极洲周围的海冰范围没有减少，为什么它在大多数但不是所有地点继续增加，观察到的增加是否存在于大气-海洋-海冰-陆地冰耦合系统的巨大年际变化中，以及为什么气候模型无法重现当前的观测结果。研讨会将有助于为美国和国际机构未来的研究议程提供信息，包括国家科学基金会、国家航空航天局和海军研究办公室。它还将有助于媒体和公众对南极海冰的讨论，使我们更清楚地了解我们知道什么和不知道什么。最后，它将有助于在从事这一专题的科学家，特别是早期职业科学家之间建立新的联系和合作。

An ad hoc NRC committee will conduct a workshop to bring together Antarctic sea ice experts to review the current science for climate-ocean-sea ice interactions in the Southern Ocean, with an outlook back 50 years and an emphasis on the record extent of satellite sensed observations over the last 3 years. This increase in the annual areal extent is at odds with best available climate model projections that suggest the sea ice should be declining in response to increasing greenhouse gases, stratospheric ozone depletion, and a warming global ocean. It is also at variance with the marked Arctic sea ice decrease. It remains unclear as to exactly why sea ice extent is not decreasing around Antarctica, why it continues to increase in most but not all locations, whether or not the observed increase lies within the large inter-annual variability of the coupled atmosphere-ocean-sea ice-land ice system, and why climate models are unable to reproduce current observations.The workshop will help inform future research agenda at US and international agencies, including NSF, the National Aeronautics and Space Administration, and the Office of Naval Research. It will also contribute to the media and public discourse about Antarctic sea ice, providing more clarity about what we do and do not know. Finally, it will help forge new connections and collaborations among scientists working on the topic, in particular early career scientists.