Conference Proposal: Scientific Exploration of the Arctic and North Pacific (SEA-NorP)

更好地约束北太平洋/白令海/北冰洋区域过去的气候和构造历史，对于了解阿拉斯加边缘的现代气候变化和地质灾害至关重要。然而，就海洋沉积物中记录的随时间变化的完整记录而言，这些区域的抽样严重不足，海洋沉积物中包含海洋和陆地发生变化的证据。这些记录可以通过美国国家科学基金会资助的钻井船R/V Jodes Resolve对海底沉积物进行取心/钻探来收集，该船为美国国家科学基金会国际海洋发现计划提供服务。这个研讨会改善了协调，最大限度地利用了昂贵的海洋钻探探险和由此产生的科学知识。它汇集了专家以及新接触海洋钻探的科学家，根据关键的科学问题和解决这些问题所需的现有场地特征数据，评估钻探的最佳选择。该研讨会专门针对在北太平洋、白令海和北冰洋有广泛兴趣的调查人员，以及职业生涯早期的调查人员。潜在的主题包括古海洋重建、气候变化中海洋生态系统的变化、构造、挥发循环和俯冲以及地质灾害。研讨会包括一系列主题演讲、聚焦于早期职业科学家和海洋钻探新手的短小的有远见的/闪电演讲，以及围绕科学主题和地理分区域组织的分组会议，将提出有针对性的科学问题。资金由国际海洋发现计划美国科学支持计划增加。更广泛的影响包括支持早期职业科学家来参加会议，利用NSF资助的海洋钻探计划、NSF资助的GeoPRISMS计划和新兴4维俯冲区倡议的资产。它还将加强旨在记录阿留申弧线及其周围地区的地质灾害及其频率的科学规划；以前在北太平洋、白令海和北冰洋的有限钻探妨碍了对地球基本过程的科学理解，例如：(1)北冰洋和北太平洋之间的海洋交换对长期气候演变和快速气候变化动力学的影响，如在海洋沉积岩心中所看到的，这使得能够重建海平面、海洋盐度、温度、海冰范围的变化，以及沿着气候系统中这一关键结合点的海洋生态系统的响应；(2)了解冰和海平面对气候变暖和冷却的响应以及古环境之间的差异，如陆冰、漂浮冰架、海冰和开阔水域；(3)记录喷发的程度、阿留申群岛的长期历史和地幔岩浆源的演化，这些历史是理解北太平洋俯冲和构造的重要起点；(4)俯冲带地震的时间间隔和模式的研究，这对于了解巨型逆冲锁定行为和由此类事件引发的海底滑坡和海啸至关重要；以及(5)提高对海洋生态系统阈值的理解，以应对气候变化和不同水平的大气二氧化碳，包括表层生产力(如季节性浮游植物水华)和不同二氧化碳时期的地下海洋生态系统)、海面温度和海平面边界条件。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

Better constraining the past climate and tectonic history of the North Pacific/Bering Sea/Arctic Ocean region is critical to understanding modern climatic changes as well as geologic hazards along the Alaskan margin. However, these regions are seriously under-sampled in terms of complete records of change over time, as recorded in marine sediments, which contain evidence of changes occurring in the oceans and on land. Such records can be collected via coring/drilling of seafloor sediments via the NSF-funded drill ship, the R/V Joides Resolution which serves the NSF International Ocean Discovery Program. This workshop improves coordination and maximizing/leveraging expensive ocean drilling expeditions and the science that comes from them. It draws together experts as well as scientists new to ocean drilling to evaluate best options for drilling based on critical scientific questions and existing site-characterization data needed to address them. The workshop specifically targets investigators with broad interests in the North Pacific, Bering Sea, and Arctic Ocean, as well as early career investigators. Potential topics include paleoceanographic reconstructions, changes in marine ecosystems across climate shifts, tectonics, volatile cycling and subduction and geohazards. The workshop involves a series of keynote talks, short visionary/lightning talks that spotlight early career scientists and those new to ocean drilling, and breakout sessions organized both around science themes and geographic sub-regions will develop targeted science questions. Funds are augmented by those the International Ocean Discovery Program US Science Support Program. Broader impacts include support of early career scientists to come to the meeting, leveraging assets of the NSF-funded ocean drilling program the NSF-funded GeoPRISMS program, and the emerging Subduction Zones in 4-Dimensions initiative. It will also enhance science planning intended to document geohazards and their frequency on the Aleutian arc and environs; and support of an early career faculty member in New Mexico, an EPSCoR state (a state that does not receive significant federal funding).Limited previous drilling in the North Pacific, Bering Sea, and Arctic Ocean hampers scientific understanding of fundamental Earth processes such as: (1) impacts of oceanic exchange between the Arctic and North Pacific Oceans on long-term climate evolution and the dynamics of rapid climate change as seen in marine sediment cores that allow reconstructions of changes in sea level, ocean salinity, temperature, sea-ice extent, and the response of marine ecosystems along this critical junction in the climate system; (2) understanding how ice and sea level respond to warming and cooling and differentiation among paleoenvironments such as grounded glacial ice, floating ice shelves, sea ice, and open waters; (3) documentation of the extent of eruptions, the long term history of the Aleutian islands and the evolution of the mantle magmatic source, histories that are an important starting point for understanding subduction and tectonics in the North Pacific; (4) studies of the time intervals and pattern of subduction zone earthquakes, which is critical for understanding megathrust locking behavior and the submarine landslides and tsunamis triggered by such events; and (5) improved understanding of marine ecosystem thresholds in response to climate change and different levels of atmospheric CO2, both in terms of surface productivity (such as seasonal phytoplankton blooms) and subsurface marine ecosystems during times of different CO2), sea surface temperature, and sea level boundary conditions.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.