GEOTRACES: Measurement of Fe(II) in the Southeastern tropical Pacific on the US GEOTRACES Transect

GEOTRACES：美国 GEOTRACES 断面对东南热带太平洋 Fe(II) 的测量

• 批准号: 1260273
• 负责人: James Moffett
• 金额: $ 9.32万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-02-15 至 2015-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1260273&HistoricalAwards=false
• 关键词: GEOTRACES; Measurement; Fe; II; Southeastern

A researcher from the University of Southern California will determine the water column distribution of soluble, reduced iron [Fe(II)] during the 2013 U.S. GEOTRACES Zonal Transect in the Eastern Tropical Pacific. The study will focus on two important sources of Fe to the Pacific Basin, reducing eastern boundary margins associated with the Peruvian Oxygen Minimum Zone (OMZ) and hydrothermal inputs along the East Pacific Rise were Fe enters the water column as Fe(II), is rapidly oxidized and partitioned onto particles as Fe(III) which constrain the importance of these sources. The data will compliment measurements of total dissolved Fe, particulate Fe and particulate Fe(II), short-lived and particle reactive isotopes, as well as manganese and iodine which have comparative redox chemistries to determine the importance of redox chemistry to the strong horizontal and vertical gradients observed for iron in this section. Broader Impacts: The project would strengthen international collaborations with scientists in Peru and Chile. One postdoc, one graduate, and one undergraduate student would be supported and trained as part of this project.

南加州大学的一名研究人员将确定2013年美国热带东太平洋地带性断面中可溶还原铁[Fe(II)]的水柱分布。这项研究将侧重于太平洋盆地铁的两个重要来源，这两个来源减少了与秘鲁氧气最小区(OMZ)有关的东部边界边缘和沿东太平洋隆起的热液输入，因为Fe以Fe(II)的形式进入水柱，被迅速氧化并以Fe(III)的形式分配到颗粒中，从而限制了这些来源的重要性。这些数据将补充对总溶解铁、颗粒态Fe和颗粒态Fe(II)、短寿命和颗粒状反应同位素以及具有相对氧化还原化学成分的锰和碘的测量，以确定氧化还原化学对本节中观察到的铁的强烈水平和垂直梯度的重要性。更广泛的影响：该项目将加强与秘鲁和智利科学家的国际合作。作为该项目的一部分，一名博士后、一名研究生和一名本科生将得到支持和培训。

项目成果

Distribution of iron in the Western Indian Ocean and the Eastern tropical South pacific: An inter-basin comparison

西印度洋和东部热带南太平洋铁的分布：流域间比较

• DOI: 10.1016/j.chemgeo.2019.119334
• 发表时间: 2020
• 期刊: Chemical Geology
• 影响因子: 3.9
• 作者: Moffett, James W.;German, Christopher R.
• 通讯作者: German, Christopher R.

Unexpected Source and Transport of Iron from the Deep Peru Margin

秘鲁深部边缘铁的意外来源和运输

• DOI: 10.1021/acsearthspacechem.0c00066
• 发表时间: 2020
• 期刊: ACS Earth and Space Chemistry
• 影响因子: 3.4
• 作者: Lam, Phoebe J.;Heller, Maija I.;Lerner, Paul E.;Moffett, James W.;Buck, Kristen N.
• 通讯作者: Buck, Kristen N.