Abstract

Marine particles are an essential component of the marine biological carbon pump (BCP). The BCP transfers particulate organic matter produced by phytoplankton at the surface into the ocean interior and exerts a primary control on the atmospheric carbon dioxide level. A limited number of particle concentration and composition measurements globally, however, remain one of the main barriers to understanding the biogeochemical cycling of marine particles and their associated elements and isotopes. This talk will focus on using particle composition as chemical tracers to investigate key biogeochemical processes associated with particles in the global ocean. I will address three main questions during this talk: 1) Why does the Western Arctic Ocean have the lowest mass flux globally? 2) Why is sediment trap flux always lower than budget-derived methods? 3) Why do high concentrations of particulate trace metals persist in the Arctic halocline and East Pacific Rise hydrothermal vent?

個人簡介：

相陽，2015年本科畢業于廈門大學海洋化學專業，2021年于美國加州大學圣克魯茲分校獲化學海洋學博士學位，同年獲加州大學校長畢業獎學金，現于美國華盛頓大學聯合美國國家海洋和大氣管理局開展博士后研究。研究基于GEOTRACES大洋航次和長時間序列站，結合化學分析和箱式模型探討全球尺度海洋顆粒物及痕量金屬的生物地球化學循環。參與發表SCI論文十余篇，多篇第一作者/通訊作者文章發表于Global Biogeochemical Cycles、Geophysical Research Letters和Journal of Geophysical Research: Oceans等國際主流期刊。擔任Geochimica et Cosmochimica Acta、Global Biogeochemical Cycles和Progress in Oceanography等期刊審稿人。

騰訊會議號：562-977-916