The Xiamen Symposium on Marine Environmental Sciences (XMAS 2027)

Timezone：Asia/Shanghai

Day 2,Jan. 13, 2027Wednesday

S69-1	Start	End	Duration	ID
S69-1	Session 69 - The nitrogen cycle in a changing ocean: from the process level to basin scale 2027-01-13 13:30 ~ 15:00 Xiamen International Conference Center 1E Harmony Hall Session convener: Colette Kelly/Woods Hole Oceanographic Institution; Xianhui Wan/Xiamen University; Andrew Babbin/Massachusetts Institute of Technology; Xin Sun/University of Pennsylvania Offline Conference Oral Session Timetable V4 Updated：2026-09-20 10:50:06
13:30	14:00	30	1600	Nitrous oxide isotopes: Tracing production, transport, and emissions from the Pacific Ocean Karen Casciotti/Stanford University Invited Oral Presentation
14:00	14:15	15	462	Constraining the spatiotemporal variability and controls of N₂O distribution and emissions in the Northwest Pacific through high-resolution reconstruction Jiahao Huang/Xiamen University Oral Presentation
14:15	14:30	15	479	A tale of two OMZs: contrasting microbial controls on nitrogen loss and retention in the Pacific Daniel McCoy/Carnegie Science Oral Presentation
14:30	14:45	15	472	Denitrification in deep-sea sediments: where does it happen? Rui Zhao/Institute of Deep-Sea Science and Engineering, Chinese Academy of Sciences Oral Presentation
14:45	15:00	15	484	Marine Nitrogen Cycle in the Anthropocene: From Seasonal to Interannual Dynamics Jin-Ming Tang/State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University / Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich Oral Presentation

S69-2	Start	End	Duration	ID
S69-2	Session 69 - The nitrogen cycle in a changing ocean: from the process level to basin scale 2027-01-13 15:20 ~ 16:50 Xiamen International Conference Center 1E Harmony Hall Session convener: Colette Kelly/Woods Hole Oceanographic Institution; Xianhui Wan/Xiamen University; Andrew Babbin/Massachusetts Institute of Technology; Xin Sun/University of Pennsylvania Offline Conference Oral Session Timetable V4 Updated：2026-09-20 10:50:06
15:20	15:50	30	1599	Stable isotope perspectives on massively disturbed redox gradients and N2O dynamics during a Baltic Sea inflow event Scott Wankel/Woods Hole Oceanographic Institution Invited Oral Presentation
15:50	16:05	15	458	Top-Down Control Differentially Regulates Chemoautotrophic Nitrifiers and Shapes the Primary Nitrite Maximum in the North Pacific and South China Sea Silin Ni/Hainan University Oral Presentation
16:05	16:20	15	486	Asymmetric Nitrification Kinetics Shape Nitrogen Partitioning under Warming Dongchen Dai/Xiamen University Oral Presentation
16:20	16:35	15	469	Isotopic insights into nitrate storage and assimilation by diatoms and macroalgae Lingkun Guo/Department of Geosciences, Princeton University Oral Presentation
16:35	16:50	15	460	Organic matter C:P reflects the magnitude of nitrogen fixation and denitrification in the global ocean Na Li/Geomar Helmholtz Centre for Ocean Research Kiel Oral Presentation
16:50	17:05	15	465	Resolving the Hidden Ecology of Candidatus Nitrosomaritimum in Coastal Wetlands[ Feng Ju/Westlake University Oral Presentation

Day 3,Jan. 14, 2027Thursday

S69-3	Start	End	Duration	ID
S69-3	Session 69 - The nitrogen cycle in a changing ocean: from the process level to basin scale 2027-01-14 08:30 ~ 10:00 Xiamen International Conference Center 1G01 Meeting Room Session convener: Colette Kelly/Woods Hole Oceanographic Institution; Xianhui Wan/Xiamen University; Andrew Babbin/Massachusetts Institute of Technology; Xin Sun/University of Pennsylvania Offline Conference Oral Session Timetable V4 Updated：2026-09-20 10:50:06
08:30	09:00	30	1601	Natural Intelligence of the Nitrogen Cycle: Fine-Tuning by Multiple Nitrogen Cycling Processes to Optimize Opportunities in Ocean Dead Zones J Michael Beman/University of California, Merced Invited Oral Presentation
09:00	09:15	15	473	Cyclonic Eddies Transiently Retain New Nitrogen Through Enhanced Nitrate Upwelling, N2 Fixation and Rapid Recycling Hui Shen/Xiamen University Oral Presentation
09:15	09:30	15	478	Significant contribution of non-cyanobacterial diazotrophs to sunlit ocean N2 fixation Run Zhang/College of Ocean and Earth Sciences, Xiamen University Oral Presentation
09:30	09:45	15	474	Isotopic evidence of dissolved organic nitrogen production and consumption in the ocean Yeongjun Ryu/Princeton University Oral Presentation
09:45	10:00	15	454	The Mediterranean Sea nitrogen cycle over the past 150 thousand years Daniel M. Sigman/Princeton University Oral Presentation

Day 4,Jan. 15, 2027Friday

S69P	Start	End	Duration	ID
S69P	Session 69 - The nitrogen cycle in a changing ocean: from the process level to basin scale 2027-01-15 16:00 ~ 18:00 Session convener: Colette Kelly/Woods Hole Oceanographic Institution; Xianhui Wan/Xiamen University; Andrew Babbin/Massachusetts Institute of Technology; Xin Sun/University of Pennsylvania Offline Conference Oral Session Timetable V4 Updated：2026-09-20 10:50:06
16:00	16:15	15	485	Iron and nitrogen supply rates regulate nitrogen fixation patterns across an upwelling - subtropical gyre transition Ze Chen/Xiamen University Poster Presentation
16:15	16:30	15	483	Partitioned benthic nitrate cycling processes and isotope effects in the abyssal plain Zeyun Li/Ocean University of China Poster Presentation
16:30	16:45	15	482	Subsurface Frontal Dynamics Induce Nitrate Regeneration and Phytoplankton Accumulation Xin Zhou/Guangdong Ocean University Poster Presentation
16:45	17:00	15	481	Environmental gradients shape seasonal and vertical variation of coastal nitrite cycling Yangjun Chen/Jiangsu Ocean University Poster Presentation
17:00	17:15	15	480	Cyclonic Eddy–Driven Nutrient Stoichiometry Shapes Diazotroph Communities and Nitrogen Fixation in the Western Tropical North Pacific Yang Yu/Xiamen University Poster Presentation
17:15	17:30	15	477	Dual-Isotope Constraints on Aerosol Nitrate Formation Pathways and NOx Sources over the East China Sea Xinxin Feng/Hainan University Poster Presentation
17:30	17:45	15	476	Nitrogen-source utilization and phytoplankton size structure modulate carbon-nitrogen coupling in the Pearl River Estuary Xiuli Yan/Shantou University Poster Presentation
17:45	18:00	15	475	Bulk and molecular organic nitrogen isotope signatures in South China Sea surface sediments: diagenetic controls and paleoecological implications Zhongyuan Luo/Tongji University Poster Presentation
18:00	18:15	15	471	Spatiotemporal Variation on Dry Deposition Fluxes of pNH₄⁺-N and pNO₃⁻-N in PM2.5 at Islands in East Asia Chung-Shin Yuan/Institute of Environmental Engineering, National Sun Yat-sen University Poster Presentation
18:15	18:30	15	470	Source and cycling processes of suspended matter in the equatorial Indian Ocean: carbon and nitrogen stable isotope analyses of amino acids Birgit Gaye/Department of Earth Sciences, University of Hamburg Poster Presentation
18:30	18:45	15	468	Labile Dissolved Organic Nitrogen Metabolism Driven by Multi-scale Dynamical Processes in the Northwest Pacific Ocean Anqi Li/Second Institute of Oceanography, Ministry of Natural Resources Poster Presentation
18:45	19:00	15	467	C:N:P stoichiometry shapes N2O emission factors across an urban river-estuary continuum: the underappreciated role of phosphorus Sibo Zhang/Guangdong University of Technology Poster Presentation
19:00	19:15	15	466	Differential kinetic responses of ammonia oxidation and nitrite oxidation to light radiation in the South China Sea Li Liu/Wenzhou University Poster Presentation
19:15	19:30	15	464	Nitrogen Fixation in the Euphotic Layer of the Tropical Western North Pacific during late summer to early fall in 2023 and 2024 Yewon Kim/Korea Institute of Ocean Science(KIOST) Poster Presentation
19:30	19:45	15	463	Nitrate nitrogen and oxygen isotopic constraints on biogeochemical cycling across the Pearl River-Estuary-Northern South China Sea continuum Feng Ye/Guangzhou Institute of geochemistry Poster Presentation
19:45	20:00	15	461	Nitrogen cycling in tropical reef sponges revealed by natural abundance nitrate and dissolved organic nitrogen isotopes Andrea F. Emmanuelli/Massachusetts Institute of Technology,Woods Hole Oceanographic Institution Poster Presentation
20:00	20:15	15	459	Based on δ15N Tracing: Spatiotemporal Variations of Nitrogen Cycling in Bohai Sea Sediments and Controlling Mechanisms Xin Li/Ocean University of China Poster Presentation
20:15	20:30	15	457	Reductions of dry atmospheric inorganic nitrogen deposition and carbon uptake in the Yellow Sea of the Northwestern Pacific Ocean for the COVID-19 period Chaeun Park/University of Science and Technology,Korea Institute of Ocean Science & Technology Poster Presentation
20:30	20:45	15	456	Weakening N* trends in the East Asian marginal seas under declining aerosols Min-Woo Seok/Korea Institute of Science and Technology Poster Presentation
20:45	21:00	15	455	Insights from Atlantic basin-scale N2O isotopic and intramolecular site preference measurements Katelyn McPaul/MIT/Woods Hole Oceanographic Institution Poster Presentation

Important Dates

Jan 30

2026

Session / Event proposals open
Mar 31

2026

Session / Event proposals close
（Extended to April 7）
Apr 30

2026

Session acceptance notifications
Apr 30

2026

Abstract submissions & registration open
Jun 30

2026

Abstract submissions close
（Extended to July 21）
Aug 31

2026

Abstract acceptance notifications
Sep 15

2026

Scientific program released
Oct 15

2026

Early bird registration closes
Jan 12–15

2027

XMAS 2027

Timetable of The Xiamen Symposium on Marine Environmental Sciences

Day 2,Jan. 13, 2027Wednesday

Session 69 - The nitrogen cycle in a changing ocean: from the process level to basin scale

Session 69 - The nitrogen cycle in a changing ocean: from the process level to basin scale

Day 3,Jan. 14, 2027Thursday

Session 69 - The nitrogen cycle in a changing ocean: from the process level to basin scale

Day 4,Jan. 15, 2027Friday

Session 69 - The nitrogen cycle in a changing ocean: from the process level to basin scale

Important Dates

2026

Session / Event proposals open

2026

Session / Event proposals close（Extended to April 7）

2026

Session acceptance notifications

2026

Abstract submissions & registration open

2026

Abstract submissions close（Extended to July 21）

2026

Abstract acceptance notifications

2026

Scientific program released

2026

Early bird registration closes

2027

XMAS 2027

Session / Event proposals close
（Extended to April 7）

Abstract submissions close
（Extended to July 21）