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.

知识分子优点：印度太平洋暖游泳池（IPWP）是地球上温暖地表水的最大储层，是全球大气的主要热源，也是深度大气对流和大降雨的位置。 IPWP内的西太平洋温暖池（WPWP）的海面温度（SST）的较小变化会影响Hadley和Walker循环中心上升的对流的位置和强度，扰动行星尺度大气循环，大气加热，全球大气加热和热带水文。直到十年前，由于WPWP缺乏高分辨率记录，或者由于关键位置缺乏记录，因此对古气候模型中这个关键区域的高分辨率古探测本质上是不存在的。唯一可用的记录来自低沉积率站点，这些站点充其量是解决冰川间 - 冰河（G-I）的可变性。但是，印尼海道和附近海洋的最新工作表明，有可能从WPWP中的主要位置获得记录，通常具有与高纬度海洋记录相当的高分辨率。在这里，PI提议调查几个网站，这些地点是通过综合海洋钻井程序（IODP）获得长长沉积物记录的潜在候选者。 这些位点是战略性选择的，以解决子午（例如ITCZ位移）与区域（ENSO相关）和垂直（热级线深度）对千禧年，轨道和世俗时间尺度的热带气候的影响。更广泛的影响：无论如何，赤道气候的重建一直是过去十年的古文化研究的亮点之一。 从该领域收集的记录有可能提供有关气候变化机制的新见解，并有助于测试用于IPCC预测的气候模型。其次，该项目将通过提供（巡航后立即批准的NSF数据存储库）来增强研究基础架构。最后，通过直接的船上指导和动手工作，这次巡航将为下一代科学家提供培训，以在海上启动和多渠道地震数据获取的复杂性中，这对于进一步的古环学研究至关重要。