北太平洋大洋钻探研究进展

北太平洋作为全球大洋环流的重要组成部分，在高低纬间热量和物质的传输与再分配方面起到重要的调控作用，进而影响到地球气候系统。基于过去50多年来的大洋钻探工作，前人在北太平洋地球科学的研究上取得了一系列的成果。本文回顾了北太平洋古海洋和古气候方面的研究进展，包括：（1）东亚夏季风和西部边界流演化，以及其对高低纬热量、水汽的传输；（2） 北太平洋中层水和深层水的性质变化、分布范围和驱动机制，以及冰期旋回中水体垂直交换作用的气候响应；（3） 风尘输入对亚洲内陆古环境的反映，及其对北太平洋生产力的铁肥效应。尽管前人针对上述科学问题都开展了相应的研究工作，但目前在对北太平洋上述几方面的认识上仍然存在着分歧。基于对前人研究的总结概括，本文最后提出了未来北太平洋研究的关键科学问题，强调了多圈层、多系统角度对深入认识过去地球气候系统变化的重要性，并对未来大洋航次开展的理想靶区进行了展望。

Research progress of ocean drilling in the North Pacific Ocean: Paleoceanography and paleoclimate

As an important part of global ocean circulation, the North Pacific Ocean plays a key role in regulating the transfer and redistribution of heat and matter between high and low latitudes, thus affecting the Earth’s climate system. Based on the ocean drilling programs over 50 years in the past, many achievements in geoscience have been made. We reviewed the progresses of paleoclimate research in the North Pacific in the following aspects: (1) the evolution of the East Asian summer monsoon and the western boundary current, as well as their contributions to the transportation of heat and water vapor between high and low latitudes in North Pacific; (2) changes in water property, distribution, and the driving mechanisms of the Pacific Deep Water and North Pacific Intermediate Water, as well as the climatic response of their interaction during glacial-interglacial cycles; (3) the response of aeolian flux to the Asian inland and its iron fertilization effect on the North Pacific productivity. Previous studies have addressed those scientific problems, uncertain issued remain controversial. We therefore proposed the key scientific issues for future research in the North Pacific Ocean, and emphasized the importance of multi-layer and multi-system perspectives for deciphering the past changes of the Earth's climate system. Finally, we suggested the ideal target areas for ocean drilling program in North Pacific in the future.