My early research was in the role of sediment–water exchange in estuarine chemistry and the estuarine reactivity of the rare earth elements (REEs) but I subsequently developed an interest in climatically active trace-gas cycling and air–sea exchange. I was part of a small team at The Marine Biological Association of the UK (later Plymouth Marine Laboratory) and the University of East Anglia that developed the so-called ‘dual-tracer technique’ for estimating gas transfer velocities at sea using sulphur hexafluoride and helium-3, a method now regarded as the ‘gold standard’ for measuring air–sea gas exchange rates on short timescales. My current work includes evaluating the environmental controls of air–sea gas transfer, especially the role of surfactants and the microbiology of the sea-surface microlayer, and the biogeochemical cycling and air–sea exchange of methane and nitrous oxide in estuaries and mangroves, on coastal shelves, and in the open ocean. I also maintain an interest in the role of terrestrial dissolved organic matter in marine trace gas and ‘available nitrogen’ photo-production. I have served on a number of UK and EU Committees, contributed to the European Nitrogen Assessment and the CARBOEUROPE report on greenhouse gas emissions from the European Coastal Zone, and I co-edited proceedings of the International Symposium on Greenhouse Gas and Carbon Balances in Mangrove Coastal Ecosystems, 2005.
Degree Stream Director: BSc. Hons. Marine Biology and Oceanography
Chair, Board of Examiners: BSc Marine Biology; BSc Marine Biology and Oceanography; BSc Marine Zoology
Chair: Marine Science Research Group
Chair: Ridley Management Group
Member: MAST School Executive Board
Member: MAST Staff-Student Liaison Committee
Member: MAST Teaching and learning Committee
Member: MAST Board of Studies
PhD University of Leeds 1985
MSc University of Southampton 1981
BSc University of Lancaster 1979
PGRF: MBA/Plymouth Marine Laboratory; 1987-1993
PGRF: University of East Anglia, Environmental Sciences; 1987-2001
PGRA: University of Cambridge, Earth Sciences; 1984-1987
Professional Scientific Societies:
How important are marine systems, especially coastal systems, to the global cycles of climatically active trace gases such as carbon dioxide, nitrous oxide, methane, and volatile sulphur?
What factors control the air-sea gas exchange process and can we parameterise them in a robust way?
What roles do bacteria at the sea surface (the Bacterioneuston) play in air-sea trace gas exchange?
What is the role played by surfactants in air-sea trace gas exchange, and can these surfactants be identified and quantified?
How reactive is Chromophoric Dissolved Organic Matter (CDOM) in coastal waters and what are the implications of this reactivity for global biogeochemical cycles?
To help try to answer these questions we have a number of ongoing research projects:
2013-2017: RAGNARoCC: Radiatively active gases from the North Atlantic Region and Climate Change. (NERC: £125,657); part of a consortium proposal lead by the University of East Anglia (UEA) and also involving the University of Southampton, the National Oceanography Centre (NOC) and Plymouth Marine Laboratory (PML).
2012-2015: Is denitrification a nitrous oxide sink? (Leverhulme Trust: £111,183). Research Associate: Dr Jonathan Barnes.
2012-2015: What is the surfactant control of air-sea gas exchange across contrasting biogeochemical regimes? (Leverhulme Trust: £138,544). Research Associate: Dr Ryan Pereira.
2011-2013: Influence of offshore-onshore surfactant gradients on air-sea gas exchange: Deutsche Forschungsgemeinschaft (DFG) Research Fellowship to Dr Klaus Schneider-Zapp (salary only).
RECENTLY EXPIRED AWARDS
Surfactant control of air-sea gas exchange in coastal waters (NERC: £49,940; 2011-2012:).
Source variability of WSOC in atmospheric precipitation (NERC: £45,114; 2010-2011).
Trace gases in Tropical Coastal zones (Leverhulme Trust: £124,887; 2006-2009).
DOGEE-SOLAS: The UK SOLAS Deep Ocean Gas Exchange Experiment (NERC: £134,654; 2005-2008).
D313 Cruise Report DOGEE-SOLAS: Nov-Dec 2006
D320 Cruise Report DOGEE-SOLAS: June-July 2007
The role of the bacterioneuston in the air-sea exchange of trace gases (NERC: £87,450; 2005-2008). Also see the article Microlayer: mystery and magic! in "SOLAS NEWS" (Issue 1, pg 11) and find out more about SOLAS activities in the School of Marine Science and Technology.
The Joint SOLAS Bergen Mesocosm Experiment(NERC: £11,569; 2008-2009).
Sources of methane to the coastal Arctic Ocean (NERC: £23,103; 2005-2006).
Atlantic Meridional Transect Programme (NERC:£47,601; 2001-2006).
The contribution to atmospheric methane from coastal marine sources NERC: £348,162; 2002-2005). See the article Methane cycling in the Ria de Vigo by Vas Kitidis et. al. in "SOLAS NEWS" (Issue 2, pg10)
Nitrification, denitrification and nitrous oxide in Indian mangrove ecosystems (NERC: £274,524; 2002-2006)
The role of photo-ammonification and photochemical formation of phosphate in oligotrophic seas (NERC: CYCLOPS). Visit the CYCLOPS Website.
Susan Fitzer (PhD 2011) Sensitivity and Predicted Population Level Effects of CO2-induced Ocean Acidification in the Benthic Harpacticoid Copepod, Tisbe holothuriae.
Matt Salter (PhD 2010): DOGEE-SOLAS: The UKSOLAS Deep Ocean Gas Exchange Experiment.
Jenna Robinson (M.Phil 2010): Basin-scale variability of coloured dissolved organic matter photobleaching and photoreactivity.
Lynsay Watson (PhD 2010): Methanogenesis in a coastal estuarine environment: a combined molecular ecological and biogeochemical approach.
Louise Tizzard (PhD 2008): A GIS database of gassy sediments on the UK continental shelf.
Tassos Anestis (PhD 2008): Origins and transformations of inorganic and organic nitrogen in river-estuarine systems.
Julian Pillans(PhD 2007): Photochemical and photobiological controls of the marine sulphur cycle.
Grant Forster (PhD 2006): Nitrous oxide and methane in the Atlantic Ocean: transects from 52o S to 50o N during AMT.
Ibrahim Al-Ansari (PhD 2006). A hydrographic and biogeochemical study of waters and sediment of the Exclusive Economic Zone (EEZ) of Qatar (Arabian Gulf).
Robert Spencer (PhD 2005): Biogeochemistry of dissolved organic matter and inorganic nitrogen in two N.E. UK estuaries
Philip Percival (PhD 2004): Impacts of trawl fisheries on marine benthic biogeochemistry.
Pedro Watts-Rodrigues (PhD 2003): Modelling nitrous oxide production in two contrasting British estuaries: The Forth and the Tyne.
Jon Barnes (PhD 2003): Nitrous oxide in UK estuaries.
Vas Kitidis (PhD 2002): CDOM dynamics and photoammonification in the marine environment.
Aron P. Stubbins (PhD 2001): Aspects of aquatic CO photoproduction from CDOM.
Tom Frost (PhD 1999): Environmental controls of air-water gas exchange.
Member, Editorial Board: Journal of Marine Science and Engineering.
Subject External Examiner, BSc Hons. Marine Biology, University of Plymouth, 2012-2015
Invited member: SCOR (Scientific Committee on Oceanic Research) http://www.scor-int.org/ international working group on "Sea Surface Microlayers (WG 141)"; 2013 onward.
Invited contributor (2009) The European Nitrogen Assessment
Member(2009-2011) MethaneNet (NERC)
Invited contributing author: Treatise on Coastal and Estuarine Science
Member (since 2008): International Management Committee of EU COST (European cooperation in the field of scientific and technical research) Action 735: Tools for assessing global air-sea fluxes of climate and air pollution relevant gases
Member: COST (European cooperation in the field of scientific and technical research) Action 735: Tools for assessing global air-sea fluxes of climate and air pollution relevant gases. Working Group 3:Development of global flux estimates of long-lived climate relevant gases
Invited expert peer reviewer (2011-): European Research Council
Invited member of the CARBOEUROPE group of experts on greenhouse gas emissions to the atmosphere from the European Coastal Zone (European Commission DG Research - Vth Framework Programme: Key Action Global Change, Climate and Biodiversity). Read our report on the European Coastal Greenhouse Gas Budget here
Nominated co-convenor: "Gas Hydrates and the Role of Methane in the Marine Environment"; European Geosciences Union 1st General Assembly, Nice, France, April 2004
Member of the Scientific Committee of the 37th Liège Colloquium on Gas Transfer At Water Surfaces, Liège, Belgium, April 2005
Invited Speaker: International Symposium on Greenhouse Gas and Carbon Balances in Mangrove Coastal Ecosystems, Tsukuba, Japan, October 2005, and co-editor of published conference proceedings
Invited Speaker: "Zero Carbon City"A global campaign by the British Council to raise awareness and stimulate debate around greenhouse gas emissions, climate change and energy challenges facing the world’s largest cities: Chennai, India, January 21-28, 2006
2013-2017: £125,657. NERC. RAGNARoCC: Radiatively active gases from the north Atlantic Refgion and Climate Change.
2012-2015: £138,544. Leverhulme Trust. What is the surfactant control of air-sea gas exchange across contrasting biogeochemical regimes?
2012-2015: £111,183. Leverhulme Trust. Is denitrification a nitrous oxide sink?
2011-2012: £49,940. NERC. Surfactant control of air-sea gas exchange.
2010-2011: £45,114. NERC. Source variability of WSOC in atmospheric precipitation.
2008-2009: £11,569. NERC. Joint SOLAS Bergen Mescosm.
2006-2009: £124,887. Leverhulme Trust: Trace gases in Mangroves.
2005-2008: £87,450. NERC. Bacterioneuston and trace gases.
2005-2008: £134,654. NERC. DOGEE-SOLAS:Air-Sea Gas Exchange.
2005-2006: £23,103. NERC. Arctic Methane.
2002-2006: £274,524. NERC. Nitrogen cycling in mangroves.
2002-2005: £7,804. NERC. Atlantic photochemistry.
2002-2005: £348,162. NERC. Coastal methane sources.
2001-2006: £47,601. NERC. Atlantic Meridional Transect.
1999-2002: £142,059. NERC. Photochemistry and dissolved nitrogen.
1999-2002: £36,460. NERC. Organic nitrogen cycling.
1999-2002: £217,126. NERC. Trace Gas Photoproduction.
1995-1997: £8,792. NERC. Thermal stability and air water gas exchange.
1995-1996: £74,151. NERC. Measuring dissolved sulphur gases in seawater.
1995-1996: £19,248. NERC. Invasive and evasive gas transfer.
MST1003: Field and Laboratory Techniques in Marine Science MST1012: Research Skills MST2014: Biogeochemistry of Estuaries and Coastal seas (Module Leader)
MST2005: Biological Oceanography
MST2006: Marine and Coastal Habitats
MST2011: Marine Practical skills
MST3003: Marine Biogeochemical Cycles (Module Leader) MST3017: Global Marine Science
MST3095/3096/3099: Research Project in Marine Science MST3011/3015/3016: Advanced Marine Biology/Zoology/Oceanography
MST8011: Critical Appraisal of Coastal Production Systems