Site survey and coring of potential IODP drill sites in the Western Pacific Warm Pool

西太平洋暖池潜在 IODP 钻探地点的现场调查和取芯

• 批准号: 1131371
• 负责人: Yair Rosenthal
• 金额: $ 27.49万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-05-15 至 2016-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1131371&HistoricalAwards=false
• 关键词: Site; survey; coring; potential; IODP

Intellectual Merit: The Indo-Pacific Warm Pool (IPWP) is the largest reservoir of warm surface water on earth, the major source of heat for the global atmosphere, and a location of deep atmospheric convection and heavy rainfall. Small variations in the sea surface temperature (SST) of the Western Pacific Warm Pool (WPWP), within the IPWP, influence the location and strength of convection in the rising limb of the Hadley and Walker circulations, perturbing planetary scale atmospheric circulation, atmospheric heating globally, and tropical hydrology. Until a decade ago, a high-resolution paleo-perspective on this critical area in paleoclimatic models was essentially non-existent due either to the lack of high-resolution records from the WPWP or because of the lack of records from key locations. The only available records came from low sedimentation rate sites that resolved glacial-interglacial (G-I) variability at best. However, recent work in the Indonesian Seaways and nearby seas has demonstrated the possibility of obtaining records from key locations in the WPWP, often with high resolution comparable to records from the high-latitude oceans. Here, the PIs propose to survey several sites that are potential candidates for obtaining long sediment records through the Integrated Ocean Drilling Program (IODP). These sites are strategically selected in order to resolve the effects of meridional (e.g., ITCZ displacement) vs. zonal (ENSO related) and vertical (thermocline depth) on the tropical climate at millennial, orbital and secular time scale. Broader Impacts: Reconstructions of equatorial climate have been among the highlights of paleoceanographic research of the last decade, by any measure. The records to be collected from this area have the potential to offer new insights into mechanisms of climate change and to help in testing climate models that are used for the IPCC predictions. Secondly, the project would enhance infrastructure for research by providing (to approved NSF data repositories immediately after the cruise) the seismic data necessary for IODP proposals that are based on collaborations among many proponents from different countries. Finally, through direct shipboard instruction and hands-on work, the cruise will provide training for the next generation of scientists in the intricacies of coring and multi-channel seismic data acquisition at sea, both of which are critical for furthering paleoceanographic research.

智力优势：印度太平洋暖池（IPWP）是地球上最大的地表温暖水库，是全球大气的主要热源，也是深层大气对流和强降雨的所在地。 IPWP 内西太平洋暖池 (WPWP) 海面温度 (SST) 的微小变化会影响哈德利和沃克环流上升肢的对流位置和强度，扰动行星尺度大气环流、大气加热全球和热带水文学。直到十年前，由于缺乏 WPWP 的高分辨率记录或因为缺乏关键地点的记录，古气候模型中这一关键区域的高分辨率古视角基本上不存在。唯一可用的记录来自低沉降率地点，这些地点最多可以解决冰期-间冰期（G-I）的变异性。然而，最近在印度尼西亚航道和附近海域进行的工作表明，有可能从 WPWP 的关键地点获取记录，其分辨率通常可与高纬度海洋的记录相媲美。在这里，PI 建议调查几个可能通过综合海洋钻探计划 (IODP) 获取长期沉积物记录的候选地点。 这些地点经过战略性选择，是为了解决经向（例如 ITCZ 位移）与纬向（ENSO 相关）和垂直（温跃层深度）对热带气候在千年、轨道和长期时间尺度上的影响。更广泛的影响：无论以何种标准衡量，赤道气候的重建都是过去十年古海洋学研究的亮点之一。 从该地区收集的记录有可能为气候变化机制提供新的见解，并有助于测试用于 IPCC 预测的气候模型。其次，该项目将通过（在巡航后立即向批准的 NSF 数据存储库）提供 IODP 提案所需的地震数据来加强研究基础设施，这些提案基于来自不同国家的许多支持者之间的合作。最后，通过直接船上指导和实践工作，该邮轮将为下一代科学家提供复杂的海上取芯和多道地震数据采集培训，这两者对于进一步开展古海洋学研究至关重要。