Dr Simon Ussher

Dr Simon Ussher

Lecturer in Inorganic Chemistry

School of Geography, Earth and Environmental Sciences (Faculty of Science & Environment)


Lecturer (Chemistry and Environmental Science)
PhD supervisor


MChem Chemistry (University of Wales, Swansea 1995-1999)
PhD Iron biogeochemistry (University of Plymouth, 2000-2005)

Professional membership

MRSC Royal Society of Chemistry
Challenger Society
American Geophysical Union (AGU)
American Society of Limnology and Oceanography (ASLO)

Roles on external bodies

Adjunct Faculty of the Bermuda Institute of Ocean Sciences
Challenger Society Fellow

Research interests

Trace metal biogeochemistry
Coupling biogeochemical models with physical and ecological models
Shipboard analytical methods and trace metal sample processing

Other research

Participant in the Atlantic Meridional Transect (AMT) time series and IRONAGES EU project

Collaboration with the Bermuda Institute of Ocean Science (BIOS), University of Tasmania (UTAS), Florida State University (FSU),  Plymouth Marine Laboratory (PML), National Oceanography Centre (NOC)

Grants & contracts

Grant income and submission record      

Co-investigator and named PDRF on the following proposal submissions unless identified:

1. “Redox and colloidal iron biogeochemistry in surface Atlantic waters” NERC Standard Grant, July 2002. Co-investigator and named PDRF, Awarded  £ 205,337

2. “Solubility of Aerosol Iron in Open-ocean Seawater” Marie Curie International Outgoing Fellowships (IOF), August 2008, Awarded  245,000

3."The supply of iron from shelf sediments to the ocean" . NERC grant Shelf Seas Biogeochemistry Programme, Co-I with Maeve Lohan, 2013-2017 Awarded £ 304,000

3. “Determining the Impact of Seawater Chemistry on the Solubility of Atmospheric Trace metals (DISCOSAT)” Marie Curie Career Integration Grant, January 2013 Awarded 100,000

Research groups

  • Biogeochemistry Research Centre (BGC)

Key publications are highlighted

Sedwick PN, Sohst BM, Ussher SJ & Bowie AR 2015 'A zonal picture of the water column distribution of dissolved iron(II) during the U.S. GEOTRACES North Atlantic transect cruise (GEOTRACES GA03)' Deep Sea Research Part II: Topical Studies in Oceanography 116, 166-175 , DOI
Floor GH, Clough R, Lohan MC, Ussher SJ, Worsfold PJ & Quetel CR 2015 'Combined uncertainty estimation for the determination of the dissolved iron amount content in seawater using flow injection with chemiluminescence detection' LIMNOLOGY AND OCEANOGRAPHY-METHODS 13, (12) 673-686 Author Site , DOI PEARL
Worsfold PJ, Lohan MC, Ussher SJ & Bowie AR 2014 'Determination of dissolved iron in seawater: A historical review' MARINE CHEMISTRY 166, 25-35 Author Site , DOI PEARL
Fishwick MP, Sedwick PN, Lohan MC, Worsfold PJ, Buck KN, Church TM & Ussher SJ 2014 'The impact of changing surface ocean conditions on the dissolution of aerosol iron' GLOBAL BIOGEOCHEMICAL CYCLES 28, (11) 1235-1250 Author Site , DOI PEARL
Ussher SJ, Achterberg EP, Powell C, Baker AR, Jickells TD, Torres R & Worsfold PJ 2013 'Impact of atmospheric deposition on the contrasting iron biogeochemistry of the North and South Atlantic Ocean' Global Biogeochemical Cycles 27, (1) , DOI
Weston K, Jickells TD, Carson DS, Clarke A, Meredith MP, Brandon MA, Wallace MI, Ussher SJ & Hendry KR 2013 'Primary production export flux in Marguerite Bay (Antarctic Peninsula): Linking upper water-column production to sediment trap flux' DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 75, 52-66 Author Site , DOI
Shelley RU, Sedwick PN, Bibby TS, Cabedo-Sanz P, Church TM, Johnson RJ, Macey AI, Marsay CM, Sholkovitz ER & Ussher SJ 2012 'Controls on dissolved cobalt in surface waters of the Sargasso Sea: Comparisons with iron and aluminum' GLOBAL BIOGEOCHEMICAL CYCLES 26, Author Site , DOI
Seguret MJM, Kocak M, Theodosi C, Ussher SJ, Worsfold PJ, Herut B, Mihalopoulos N, Kubilay N & Nimmo M 2011 'Iron solubility in crustal and anthropogenic aerosols: The Eastern Mediterranean as a case study' MARINE CHEMISTRY 126, (1-4) 229-238 Author Site , DOI
Ussher SJ, Manning AJ, Tappin AD & Fitzsimons MF 2011 'Observed dissolved and particulate nitrogen concentrations in a mini flume' HYDROBIOLOGIA 672, (1) 69-77 Author Site , DOI
Ussher SJ, Achterberg EP, Sarthou G, Laan P, de Baar HJW & Worsfold PJ 2010 'Distribution of size fractionated dissolved iron in the Canary Basin' Mar Environ Res 70, (1) 46-55 Author Site , DOI
Ussher SJ, Petrov I, Quétel CR & Worsfold PJ 2010 'Validation of a portable flow injection–chemiluminescence (FI-CL) method for the determination of dissolved iron in Atlantic open ocean and shelf waters by comparison with isotope dilution–inductively coupled plasma mass spectrometry (ID-ICPMS)' Environmental Chemistry 7, (2) 139-139 , DOI
Ussher SJ, Milne A, Landing WM, Attiq-ur-Rehman K, Séguret MJM, Holland T, Achterberg EP, Nabi A & Worsfold PJ 2009 'Investigation of iron(III) reduction and trace metal interferences in the determination of dissolved iron in seawater using flow injection with luminol chemiluminescence detection' Anal Chim Acta 652, (1-2) 259-265 Author Site , DOI
Moore CM, Mills MM, Achterberg EP, Geider RJ, LaRoche J, Lucas MI, McDonagh EL, Pan X, Poulton AJ & Rijkenberg MJA 2009 'Large-scale distribution of Atlantic nitrogen fixation controlled by iron availability' NATURE GEOSCIENCE 2, (12) 867-871 Author Site , DOI
Séguret MJM, Ussher SJ, Worsfold PJ, Nimmo M & Wood JW 2007 'Automatic sampler coupled with flow injection-chemiluminescence detection to monitor particle/natural water interactions' Instrumentation Science & Technology 36, 18-31 , DOI
Ussher SJ, Worsfold PJ, Achterberg EP, Laes A, Blain S, Laan P & de Baar HJW 2007 'Distribution and redox speciation of dissolved iron on the European continental margin' Limnology and Oceanography 52, (6) 2530-2539
Sarthou G, Baker AR, Kramer J, Laan P, Laes A, Ussher S, Achterberg EP, de Baar HJW, Timmermans KR & Blain S 2007 'Influence of atmospheric inputs on the iron distribution in the subtropical North-East Atlantic Ocean' Marine Chemistry 104, (3-4) 186-202
Bowie AR, Ussher SJ, Landing WM & Worsfold PJ 2007 'Intercomparison between FI-CL and ICP-MS for the determination of dissolved iron in Atlantic seawater' Environmental Chemistry 4, (1) 1-4
Laes A, Blain S, Laan P, Ussher SJ, Achterberg EP, Treguer P & de Baar HJW 2007 'Sources and transport of dissolved iron and manganese along the continental margin of the Bay of Biscay' Biogeosciences 4, (2) 181-194
Bowie AR, Achterberg EP, Croot PL, de Baar HJW, Laan P, Moffett JW, Ussher S & Worsfold PJ 2006 'A community-wide intercomparison exercise for the determination of dissolved iron in seawater' Marine Chemistry 98, (1) 81-99
Bowie AR, Achterberg EP, Ussher S & Worsfold PJ 2005 'Design of an automated flow injection-chemiluminescence instrument incorporating a miniature photomultiplier tube for monitoring picomolar concentrations of iron in seawater' Journal of Automated Methods & Management in Chemistry 2005, (2) 37-43 PEARL
Ussher SJ, Yaqoob M, Achterberg EP, Nabi A & Worsfold PJ 2005 'Effect of model ligands on iron redox speciation in natural waters using flow injection with luminol chemiluminescence detection' Analytical Chemistry 77, (7) 1971-1978
Sedwick PN, Church TM, Bowie AR, Marsay CM, Ussher SJ, Achilles KM, Lethaby PJ, Johnson RJ, Sarin MM & McGillicuddy DJ 2005 'Iron in the Sargasso Sea (Bermuda Atlantic Time-series Study region) during summer: Eolian imprint, spatiotemporal variability, and ecological implications' Global Biogeochemical Cycles 19, (4)
Ussher SJ, Achterberg EP & Worsfold PJ 2004 'Marine Biogeochemistry of Iron' ENVIRONMENTAL CHEMISTRY 1, (2) 67-80 Author Site , DOI
Gledhill M, McCormack P, Ussher S, Achterberg EP, Mantoura RFC & Worsfold PJ 2004 'Production of siderophore type chelates by mixed bacterioplankton populations in nutrient enriched seawater incubations' Marine Chemistry 88, (1-2) 75-83
Yaqoob M, Ussher SJ, Nabi A, Achterberg EP & Worsfold PJ 2003 'Direct determination of iron(II) in acidified seawater using a matrix matched flow injection manifold with chemiluminescence detection, ,, , (2003)' Journal of Flow Injection Analysis 20, 183-186
Worsfold PJ, Achterberg E, Bowie A, Gardolinski P, Gledhill M, Hanrahan G, McKelvie I & Ussher S 2003 'Field-based analytical techniques for aquatic environmental monitoring, , Chiang Mai Journal of Science, , (2003)' Chiang Mai Journal of Science 30, 153-164
Hanrahan G, Ussher S, Gledhill M, Achterberg EP & Worsfold PJ 2002 'High temporal and spatial resolution environmental monitoring using flow injection with spectroscopic detection' Trac-Trends in Analytical Chemistry 21, (4) 233-239
Bowie AR, Achterberg EP, Sedwick PN, Ussher S & Worsfold PJ 2002 'Real-time monitoring of picomolar concentrations of iron(II) in marine waters using automated flow injection-chemiluminescence instrumentation' Environmental Science & Technology 36, (21) 4600-4607
Conference Papers
Achterberg EP, Ussher S, Gledhill M, Worsfold PJ, Bowie AR, Gehrels WR, Geider R & de Baar HJ 2004 'Role of iron in marine biogeochemistry' //0 //0 A327-A327