Aerosol iron solubility over the Southern and Atlantic Oceans

南洋和大西洋上空的气溶胶铁溶解度

基本信息

批准号：
NE/E010180/1
负责人：
Alexander Baker
金额：
$ 5.35万
依托单位：
University of East Anglia
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2007
资助国家：
英国
起止时间：
2007 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=NE%2FE010180%2F1
关键词：
Aerosol iron solubility over Southern

项目摘要

This project aims to study some important aspects of the influence of iron chemistry in the environment on the growth of microscopic plants (phytoplankton) in the ocean. Levels of iron in the ocean are extremely low and this poses a problem for phytoplankton, because iron is an essential component of many of their enzyme systems. Large amounts of iron get blown into the oceans from deserts around the world, but ocean areas a great distance from deserts receive very little of this iron. The Southern Ocean around Antarctica is one such area, where iron levels are so low that in vast areas the phytoplankton population is unable to use up large stores of nutrients such as nitrogen and phosphorus because they do have enough iron (they are iron-limited). Paradoxically, despite the importance of the Southern Ocean as an iron-limited region, it is probably the ocean region for which we have the least reliable information on iron inputs from the atmosphere. One of the goals of our project is therefore to collect samples of rain and aerosol during two research cruises that together will track from the southern tip of Africa to Antarctica, then west across a region of the Southern Ocean known as the Weddell Sea, and finally north to the tip of South America. A complicating factor in studying iron inputs to the ocean is that a large proportion of the iron that falls into the ocean in dust remains in the dust and simply falls to the seabed. Only the proportion of iron that dissolves in seawater is available for use by phytoplankton. Understanding what that soluble portion is, and what environmental factors control it, is a major challenge. Our second goal is to measure the soluble portion of iron in aerosol samples collected during the two Southern Ocean cruises and also in samples we have already collected during 11 other research cruises in other regions of the Atlantic Ocean. This large database will allow us to better understand how this key component of the Earth System functions and how iron deposited into the oceans can affect phytoplankton growth and climate.

该项目旨在研究铁化学对环境对海洋微观植物生长的影响的一些重要方面。海洋中的铁水平极低，这对浮游植物构成了问题，因为铁是其许多酶系统的重要组成部分。大量的铁从世界各地的沙漠中吹入海洋，但与沙漠相距很大的海洋地区几乎没有这种铁。南极周围的南大洋就是这样一个地区，铁水平如此之低，以至于在广阔的地区，浮游植物种群无法用尽大量的养分，例如氮和磷，因为它们确实具有足够的铁（它们是铁限制的）。矛盾的是，尽管南大洋是铁限制的地区的重要性，但它可能是我们对大气中铁投入的可靠信息最低的海洋地区。因此，我们项目的目标之一是在两次研究巡游中收集雨水和气溶胶样本，这些巡航将从非洲南端到南极洲，然后向西穿过南大洋地区，被称为韦德尔海，最后向北到南美尖端。研究对海洋的铁投入的一个复杂因素是，在灰尘中落入灰尘中的大部分铁中，只有一小部分铁在灰尘中，只是掉到了海床上。浮游植物只能使用溶解在海水中的铁的比例。了解该可溶部分是什么，以及哪些环境因素控制它是一个主要挑战。我们的第二个目标是测量在两次南大洋巡游期间收集的气溶胶样品中的铁的可溶部分，在样品中，我们在大西洋其他地区的其他11次研究巡游中已经收集了。这个大型数据库将使我们能够更好地了解地球系统的这个关键组成部分以及沉积在海洋中的铁如何影响浮游植物的生长和气候。

项目成果

期刊论文数量（6）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Distributions of dissolved trace metals (Cd, Cu, Mn, Pb, Ag) in the southeastern Atlantic and the Southern Ocean

DOI：
10.5194/bg-9-3231-2012
发表时间：
2012-01-01
期刊：
BIOGEOSCIENCES
影响因子：
4.9
作者：
Boye, M.;Wake, B. D.;Achterberg, E. P.
通讯作者：
Achterberg, E. P.

Impact of atmospheric deposition on the contrasting iron biogeochemistry of the North and South Atlantic Ocean

DOI：
10.1002/gbc.20056
发表时间：
2013-12
期刊：
Global Biogeochemical Cycles
影响因子：
5.2
作者：
S. Ussher;E. Achterberg;Claire F. Powell;A. Baker;T. Jickells;R. Torres;P. Worsfold
通讯作者：
S. Ussher;E. Achterberg;Claire F. Powell;A. Baker;T. Jickells;R. Torres;P. Worsfold

Atmospheric trace metal concentrations, solubility and deposition fluxes in remote marine air over the south-east Atlantic