徐兆凯，男，1978年生，博士，研究员，硕士生导师。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，期间国家公派出国交流并兼任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（筹）和中国科学院第四纪科学与全球变化卓越创新中心（筹）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、地质科技情报期刊编委、国际顶级地学期刊（Quaternary Science Reviews、Earth and Planetary Science Letters、Geochimica et Cosmochimica Acta、Scientific Reports和Chemical 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，登船科学家）、363（西太平洋暖池，岸上合作科学家）和369（白垩纪气候与构造，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（如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）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层面上，亚洲边缘海和东印度洋-西太平洋暖池区陆源物质的定量输入过程、主要控制因素及其古海洋学和古气候学效应（如大气温室气体二氧化碳浓度波动、海表生物生产力水平、海底有机碳埋藏通量和全球碳循环过程），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（如二氧化碳）浓度骤增等系列危机提供了坚实的区域资料和科学依据。相应的研究载体包含IODP航次的多根高质量、长岩芯及现代（如沉积物捕获器和风尘收集器）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。
研究领域
海洋地质学、古海洋学与古气候学。
招生专业及方向
海洋地质专业；海洋沉积地球化学、古海洋学与古环境方向。
研究室、联系方式
中国科学院海洋地质与环境重点实验室；电话：；E-mail: zhaokaixu@qdio.ac.cn。
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）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。
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。
代表性论文及著作
已正式发表第一/通讯作者学术论文40余篇（含30余篇SCI/EI），所发表的国际地学领域一流期刊主要有：Quaternary Science Reviews、Paleoceanography and Paleoclimatology、Chemical Geology、Paleoceanography、Journal of Geophysical Research：Atmospheres、Journal of Geophysical Research：Oceans、Marine Geology、Geochemistry Geophysics Geosystems、Palaeogeography Palaeoclimatology Palaeoecology和Journal of Asian Earth Sciences等；共同撰写IODP航次初步/进展报告四部。近五年来发表的第一/通讯作者（*）SCI学术论文有：
1. 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 "">2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
7. 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.
8. 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.
9. 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 εNd values inferred from 1 year of in situ observations above Benham Rise. Journal of Geophysical Research: Oceans, 2018, 123: 6688-6702.
10. 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.
11. Jihun Kim, Dhongil Lim*, Dohyun Jung, Jeongwon Kang, Hoisoo Jung, Hanjun Woo, Kapsik Jeong, Zhaokai Xu*. Sedimentary mercury (Hg) in the "; ">12. Dhongil Lim*, Jihun Kim, Zhaokai Xu*, Kapsik Jeong, Hoisoo Jung. New evidence for Kuroshio inflow and deepwater circulation in the Okinawa Trough, East China Sea: Sedimentary mercury variations over the last 20 kyr. Paleoceanography, 2017, 32: 571-579.
13. Zhaokai Xu, Tiegang Li, Peter D. Clift, Dhongil Lim*, Qingyun Nan*, Shiming Wan, Jinyong Choi, Mingjiang Cai, Hongjin Chen. Sediment provenance and paleoenvironmental change in the middle Okinawa Trough during the last 18.5 ky: Clay mineral and geochemical evidence. Quaternary International, 2017, 440: 139-149.
14. Zhaokai Xu*, Tiegang Li*, Peter D. Clift, Shiming Wan, Mingjiang Cai, Hongjin Chen. Comment on “Sr-Nd isotope composition and clay mineral assemblages in eolian dust from the central Philippine Sea over the last 600 kyr: Implications for the transport mechanism of Asian dust” by Seo et al. Journal of Geophysical Research: Atmospheres, 2016, 121: 14137-14141.
15. Hoisoo Jung, Dhongil Lim*, Dohyun Jeong, Zhaokai Xu*, Tiegang Li. Discrimination of sediment provenance in the Yellow Sea: Secondary grain-size effect and REE proxy. Journal of Asian Earth Sciences, 2016, 123: 78-84.
16. Zhaokai Xu*, Tiegang Li*, Peter D. Clift, Dhongil Lim, Shiming Wan, Hongjin Chen, Zheng Tang, Fuqing Jiang, Zhifang Xiong. Quantitative estimates of Asian dust input to the western Philippine Sea in the mid-late Quaternary and its potential significance for paleoenvironment. Geochemistry Geophysics Geosystems, 2015, 16: 3182-3196.
17. Dhongil Lim, Zhaokai Xu*, Jinyong Choi, Tiegang Li, Soyoung Kim. Holocene changes in detrital sediment supply to the eastern part of the central Yellow Sea and their forcing mechanisms. Journal of Asian Earth Sciences, 2015, 105: 18-31.
18. Tiegang Li, Zhaokai Xu*, Dhongil Lim*, Fengming Chang, Shiming Wan, HoiSoo Jung, Jinyong Choi. Sr-Nd isotopic constraints on detrital sediment provenance and paleoenvironmental change in the northern Okinawa Trough during the late Quaternary. Palaeogeography Palaeoclimatology Palaeoecology, 2015, 430: 74-84.
19. Dhongil Lim, Hoisoo Jung, Zhaokai Xu*, Kapsik Jeong, Tiegang Li. Elemental and Sr-Nd isotopic compositional disparity of riverine sediments around the Yellow Sea: Constraints from grain-size and chemical partitioning. Applied Geochemistry, 2015, 63: 272-281.