徐兆凯，男，1978年生，博士，研究员，博士生导师。2007年毕业于中国科学院海洋研究所并获海洋地质学博士学位，随后赴国外从事博士后研究。2009年7月至今在中国科学院海洋研究所工作，期间曾以国家公派访问学者身份出国交流并兼任崂山实验室（原青岛海洋科学与技术试点国家实验室）、中国科学院海洋大科学研究中心和中国科学院第四纪科学与全球变化卓越创新中心研究员。为2013年中国科学院科技创新“交叉与合作团队”核心成员、国家科技专家库专家、国家自然科学基金评议专家、中国第四纪科学研究会间冰期气候与环境专业委员会委员、地质科技通报期刊编辑委员会委员、海洋地质与第四纪地质和海洋地质前沿两个期刊第一届青年编辑委员会主任委员、国际顶级地学期刊（Quaternary Science Reviews、Earth and Planetary Science Letters、Geochimica et Cosmochimica Acta、Scientific Reports、Global and Planetary Change、Chemical Geology和Marine Geology等）审稿专家。受邀参加国际上深海地质研究领域最前沿合作项目——国际大洋发现计划（IODP）355（阿拉伯海季风主题，登船科学家）、363（西太平洋暖池主题，岸上合作科学家）和369（白垩纪气候与构造主题，登船科学家）航次及航次后研究。与欧、美、亚等地多家国际知名科学研究机构间合作密切（联合申报国家自然科学基金项目、实验室和仪器设备共享、通过国家留学基金委“国家建设高水平大学公派研究生项目”等途径联合培养研究生等），多次在国际（地区）和国内重要学术会议上作报告。

当前研究兴趣主要为：基于多学科交叉，从地球系统多圈层相互作用角度，探讨白垩纪以来不同时间分辨率（构造、轨道、千年、百年及现代等）层面上，亚洲边缘海和东印度洋-西太平洋暖池周边的陆表风化剥蚀作用及其产物的定量入海过程、主要控制因素及其古海洋学和古气候学效应（大气温室气体二氧化碳浓度波动、海表生物生产力水平、海底氧化-还原环境、深海有机碳埋藏通量和全球碳循环过程等），以期为人类更好地认识、预测和应对未来的全球气候变暖及大气温室气体（二氧化碳等）浓度骤增等系列危机提供坚实的区域性资料和科学依据。相应的研究载体包含IODP航次的多根高质量、长沉积物岩芯及现代（沉积物捕获器和风尘收集器等来源）沉积物样品。已在热带火山岛弧地区“硅酸盐风化”假说、热带西太平洋地区风尘“铁”假说及热带东印度洋地区“陆源有机碳海底埋藏”假说的全球碳循环效应验证以及西太平洋边界流强度历史演化新指标的提取等领域取得了创新性研究成果。

一、研究领域                                                                              

海洋地质学、古海洋学与古气候学。

二、招生专业及方向

海洋地质专业；海洋沉积学、古海洋与古环境方向。

三、研究室及联系方式                                                                                                                   

中国科学院海洋地质与环境重点实验室；电话：0532-82898835；邮箱：zhaokaixu@qdio.ac.cn。

四、承担的主要科研项目

国家全球变化与海气相互作用专项项目一项、国家海洋局和中国地质调查局专项项目课题各一项、国家自然科学基金项目四项、中国科学院战略性先导科技专项（B类）项目子课题一项、崂山实验室（原青岛海洋科学与技术试点国家实验室）“十四五”重大项目子课题一项以及国际大洋发现计划（IODP）航次资助项目两项等。                                                                      五、研究成果及奖励                                                                             

 参研的“黑潮流域古海洋学研究”获2011年国家海洋局创新成果二等奖；参研的“冰期旋回中热带西太平洋的碳源-汇效应”获2020年海洋工程科学技术一等奖。                                 

六、代表性论文及著作

已正式发表第一/通讯作者SCI/EI学术论文40余篇，其中涉及到的国际地学领域一流期刊主要有：Earth and Planetary Science Letters、Geophysical Research Letters、Global and Planetary Change、Quaternary Science Reviews、Frontiers in Marine Science、Paleoceanography and Paleoclimatology、Chemical Geology、Paleoceanography、Journal of Geophysical Research：Atmospheres、Journal of Geophysical Research：Oceans、Journal of Geophysical Research：Earth Surface、Marine Geology、Geochemistry Geophysics Geosystems、Palaeogeography Palaeoclimatology Palaeoecology和Journal of Asian Earth Sciences等；共同撰写IODP航次初步/进展英文报告四部。近五年来发表的第一/通讯作者（*）SCI学术论文主要有：

1. Hongjin Chen, Germain Bayon∗, Zhaokai Xu∗, Tiegang Li. Hafnium isotope evidence for enhanced weatherability at high southern latitudes during Oceanic Anoxic Event 2. Earth and Planetary Science Letters, 2023, 601: 117910.

2. Qingchao Fan†, Zhaokai Xu†*, Kenneth G. MacLeod†, Hans-Jürgen Brumsack†, Tiegang Li†, Fengming Chang†, Shiming Wan†, Laurent Riquier†, Delong Fu†, Zhendong Luan†, Baichuan Duan†, Hongjin Chen†, Wei Wang, Dhongil Lim*. First record of oceanic anoxic event 1d at Southern high latitudes: Sedimentary and geochemical evidence from International Ocean Discovery Program Expedition 369. Geophysical Research Letters, 2022, 49: e2021GL097641 (†为共同第一作者).

3. Mingjiang Cai, Christophe Colin, Zhaokai Xu*, Wei Wang, Yikun Cui, Zhaojie Yu, Shanshan Zhang, Hanjie Sun, Tiegang Li*. Climate and sea level forcing of terrigenous sediments input to the eastern Arabian Sea since the last glacial period. Marine Geology, 2022, 450: 106860.

4. Hongjin Chen, Zhaokai Xu*, Germain Bayon, Dhongil Lim, Sietske J. Batenburg, Maria Rose Petrizzo, Takashi Hasegawa, Tiegang Li*. Enhanced hydrological cycle during Oceanic Anoxic Event 2 at southern high latitudes: New insights from IODP Site U1516. Global and Planetary Change, 2022, 209: 103735.

5. Dhongil Lim*, Jihun Kim, Wonnyon Kim, Jonguk Kim, Dongsung Kim, Le Zhang, Kyungun Kwack, Zhaokai Xu*. Characterization of geochemistry in hydrothermal sediments from the newly discovered Onnuri vent field in the middle region of the Central Indian Ridge. Frontiers in Marine Science, 2022, 9: 810949.

6. Tianqi Sun, Zhaokai Xu*, Fengming Chang, Tiegang Li*. Climate evolution of southwest Australia in the Miocene and its main controlling factors. Science China Earth Sciences, 2022, 65(6): 1104-1115.

7. Wei Wang, Christophe Colin, Zhaokai Xu*, Dhongil Lim, Shiming Wan, Tiegang Li*. Tectonic and climatic controls on sediment transport to the Southeast Indian Ocean during the Eocene: New insights from IODP Site U1514. Global and Planetary Change, 2022, 209: 103735.

8. Zhaokai Xu*, Shiming Wan, Christophe Colin, Peter D. Clift, Fengming Chang, Tiegang Li*, Hongjin Chen, Mingjiang Cai, Zhaojie Yu, Dhongil Lim*. Enhancements of Himalayan and Tibetan erosion and the produced organic carbon burial in distal tropical marginal seas during the Quaternary glacial periods: An integration of sedimentary records. Journal of Geophysical Research: Earth Surface, 2021, 126: e2020JF005828.

9. Dhongil Lim*, Jihun Kim, Jonguk Kim, Dongsung Kim, Dohyun Jeong, Haryun Kim, Zhaokai Xu*. Enhancement of volcanic eruption in mid-ocean ridge during the last deglaciation: New sedimentary evidence in the middle part of Central Indian Ridge. Marine Geology, 2021, 440: 106574.

10. Zhaokai Xu, Shiming Wan, Christophe Colin, Tiegang Li*, Peter D. Clift, Fengming Chang, Rongtao Sun, Zhaojie Yu, Dhongil Lim*. Enhanced terrigenous organic matter input and productivity on the western margin of the Western Pacific Warm Pool during the Quaternary sea-level lowstands: Forcing mechanisms and implications for the global carbon cycle. Quaternary Science Reviews, 2020, 232: 106211.

11. Hongjin Chen, Zhaokai Xu*, Dhongil Lim, Peter D. Clift, Fengming Chang, Tiegang Li*, Mingjiang Cai, Wei Wang, Zhaojie Yu, Rongtao Sun. Geochemical records of the provenance and silicate weathering/erosion from the eastern Arabian Sea and their responses to the Indian summer monsoon since the Mid-Pleistocene. Paleoceanography and Paleoclimatology, 2020, 35: e2019PA003732.

12. Wei Wang, Zhaokai Xu*, Tiegang Li, Shiming Wan, Mingjiang Cai, Hongjin Chen, Rongtao Sun, Dhongil Lim*. Sources and origins of eolian dust to the Philippine Sea determined by major minerals and elemental geochemistry. Geological Magazine, 2020, 157: 719-728.

13. Mingjiang Cai, Zhaokai Xu*, Peter D. Clift, Boo-Keun Khim, Dhongil Lim, Zhaojie Yu, Denise K. Kulhanek, Tiegang Li*. Long-term history of sediment inputs to the eastern Arabian Sea and its implications for the evolution of the Indian summer monsoon since 3.7 Ma. Geological Magazine, 2020, 157: 908-919.

14. Zhaokai Xu, Dhongil Lim*, Tiegang Li*, Soyoung Kim, Hoisoo Jung, Shiming Wan, Fengming Chang, Mingjiang Cai. REEs and Sr-Nd isotope variations in a 20 ky-sediment core from the middle Okinawa Trough, East China Sea: An in-depth provenance analysis of siliciclastic components. Marine Geology, 2019, 415: 105970.

15. Zhaokai Xu, Tiegang Li*, Peter D. Clift, Shiming Wan, Dhongil Lim*, Fengming Chang, Rongtao Sun. Sea-level, monsoonal, and anthropogenic impacts on the millennial-scale variability of siliciclastic sediment input into the western Philippine sea since 27 ka. Journal of Asian Earth Sciences, 2019, 177: 250-262.

16. Hongjin Chen, Zhaokai Xu*, Peter D. Clift, Dhongil Lim, Boo-Keun Khim*, Zhaojie Yu. Orbital-scale evolution of the Indian summer monsoon since 1.2 Ma: Evidence from clay mineral records at IODP Expedition 355 Site U1456 in the eastern Arabian Sea. Journal of Asian Earth Sciences, 2019, 174: 11-22.

17. Mingjiang Cai, Zhaokai Xu*, Peter D. Clift, Dhongil Lim, Boo-Keun Khim, Zhaojie Yu, Denise K. Kulhanek, Tiegang Li*, Hongjin Chen, Rongtao Sun. Depositional history and Indian summer monsoon controls on the silicate weathering of sediment transported to the eastern Arabian Sea: Geochemical records from IODP Site U1456 since 3.8 Ma. Geochemistry Geophysics Geosystems, 2019, 20: 4336-4353.

18. Zhaokai Xu, Tiegang Li*, Christophe Colin, Peter D. Clift, Rongtao Sun, Zhaojie Yu, Shiming Wan, Dhongil Lim*. Seasonal variations in the siliciclastic fluxes to the western Philippine Sea and their impacts on seawater ε_Nd values inferred from 1 year of in situ observations above Benham Rise. Journal of Geophysical Research: Oceans, 2018, 123: 6688-6702.

19. Zhaokai Xu, Tiegang Li*, Peter D. Clift, Shiming Wan, Xiaohua Qiu, Dhongil Lim*. Bathyal records of enhanced silicate erosion and weathering on the exposed Luzon shelf during glacial lowstands and their significance for atmospheric CO₂ sink. Chemical Geology, 2018, 476: 302-315.

20. Jihun Kim, Dhongil Lim*, Dohyun Jung, Jeongwon Kang, Hoisoo Jung, Hanjun Woo, Kapsik Jeong, Zhaokai Xu*. Sedimentary mercury (Hg) in the marginal seas adjacent to Chinese high-Hg emissions: Source-to-sink, mass inventory, and accumulation history. Marine Pollution Bulletin, 2018, 128: 428-437.