Vassilis Kitidis
A5033530484- Ocean Acidification Effects and Responses
- Marine and coastal ecosystems
- Atmospheric and Environmental Gas Dynamics
- Methane Hydrates and Related Phenomena
- Oceanographic and Atmospheric Processes
- Marine Biology and Ecology Research
- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Microbial Community Ecology and Physiology
- Marine Bivalve and Aquaculture Studies
- Maritime Navigation and Safety
- Soil and Water Nutrient Dynamics
- Climate variability and models
- Carbon Dioxide Capture Technologies
- Arctic and Antarctic ice dynamics
- Coral and Marine Ecosystems Studies
- Coastal wetland ecosystem dynamics
- Wastewater Treatment and Nitrogen Removal
- Isotope Analysis in Ecology
- Aquatic Ecosystems and Phytoplankton Dynamics
- CO2 Sequestration and Geologic Interactions
- Groundwater and Isotope Geochemistry
- Marine and fisheries research
- Spectroscopy and Laser Applications
- Analytical Chemistry and Sensors
Plymouth Marine Laboratory
2015-2024
University of Exeter
2022
Newcastle University
2005-2010
Abstract. Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, terrestrial biosphere in a changing climate – “global budget” is important to better understand global cycle, support development policies, project future change. Here we describe synthesize data sets methodology quantify five major components budget uncertainties. Fossil CO2 (EFOS) are based on energy statistics cement production data, while from land-use...
Abstract. Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, terrestrial biosphere is important to better understand global cycle, support development climate policies, project future change. Here we describe data sets a methodology quantify all major components budget, including uncertainties, based on combination range data, algorithms, statistics, model estimates interpretation by broad scientific community. We discuss...
Abstract. Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, terrestrial biosphere is important to better understand global cycle, support development climate policies, project future change. Here we describe data sets a methodology quantify all major components budget, including uncertainties, based on combination range data, algorithms, statistics, model estimates interpretation by broad scientific community. We discuss...
Abstract. The Surface Ocean CO2 Atlas (SOCAT) is a synthesis of quality-controlled fCO2 (fugacity carbon dioxide) values for the global surface oceans and coastal seas with regular updates. Version 3 SOCAT has 14.7 million from 3646 data sets covering years 1957 to 2014. This latest version an additional 4.6 relative 2 extends record 2011 also significantly increases availability 2005 2013. average approximately 1.2 water per year 2006 2012. Quality documentation improved. A new feature set...
The marine laboratories in Plymouth have sampled at two principle sites the Western English Channel for over a century open-shelf (station E1; 50° 02′N, 4° 22′W) and coastal L4; 15′N, 13′W) waters. These stations are seasonally stratified from late-April until September, variable biological response is regulated by subtle variations temperature, light, nutrients meteorology. Station L4 characterized summer nutrient depletion, although intense precipitation, increasing riverine input to...
Abstract. The Surface Ocean CO2 Atlas (SOCAT), an activity of the international marine carbon research community, provides access to synthesis and gridded fCO2 (fugacity dioxide) products for surface oceans. Version 2 SOCAT is update previous release (version 1) with more data (increased from 6.3 million 10.1 water values) extended coverage (from 1968–2007 1968–2011). quality control criteria, while identical in both versions, have been applied strictly version than 1. website...
Abstract. Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, terrestrial biosphere is important to better understand global cycle, support development climate policies, project future change. Here we describe datasets a methodology quantify all major components budget, including uncertainties, based on combination range data, algorithms, statistics model estimates interpretation by broad scientific community. We discuss...
Abstract The dissolved organic carbon (DOC) export from land to ocean via rivers is a significant term in the global C cycle, and has been modified many areas by human activity. DOC exports large are fairly well quantified, but those smaller river systems, including draining oceanic regions, generally under-represented syntheses. Given that these regions typically have high runoff peat cover, they may exert disproportionate influence on land–ocean export. Here we describe comprehensive new...
[1] Ammonia oxidation is a key microbial process within the marine N-cycle. Sediment and water column samples from two contrasting sites in English Channel (mud sand) were incubated (up to 14 weeks) CO2-acidified seawater ranging pH 8.0 6.1. Additional observations made off island of Ischia (Mediterranean Sea), natural analogue site, where long-term thermogenic CO2 ebullition occurs (from 8.2 7.6). Water ammonia rates decreased under low with near-complete inhibition at 6.5. showed similar...
Abstract Oceanic oxygen minimum zones are strong sources of the potent greenhouse gas N 2 O but its microbial source is unclear. We characterized an exponential response in production to decreasing between 1 and 30 μmol l −1 within below oxycline using 15 NO − , a relationship that held along 550 km offshore transect North Pacific. Differences overall magnitude were accounted for by archaeal functional gene abundance. A one-dimensional (1D) model, parameterized with our experimentally...
Abstract. Air–sea carbon dioxide (CO2) flux is often indirectly estimated by the bulk method using air–sea difference in CO2 fugacity (ΔfCO2) and a parameterisation of gas transfer velocity (K). Direct measurements eddy covariance (EC) provide an independent reference for estimates are used to study processes that drive K. However, inherent uncertainties EC from ships have not been well quantified may confound analyses This paper evaluates fluxes four cruises. Fluxes were measured with two...
The Southern Ocean is the primary region for uptake of anthropogenic carbon dioxide (CO
Abstract The transport of dissolved organic matter (DOM) across the land-ocean-aquatic-continuum (LOAC), from freshwater to ocean, is an important yet poorly understood component global carbon budget. Exploring and quantifying this flux a significant challenge given complexities DOM cycling these contrasting environments. We developed new model, UniDOM, that unifies concepts, state variables parameterisations turnover LOAC. Terrigenous divided into two pools, T 1 (strongly-UV-absorbing) 2...
Abstract. Dimethyl sulfide and volatile organic compounds (VOCs) are important for atmospheric chemistry. The emissions of biogenically derived gases, including dimethyl especially isoprene, not well constrained in the Southern Ocean. Due to a paucity measurements, role ocean budgets methanol, acetone, acetaldehyde is even more poorly known. In order quantify air–sea fluxes these we measured their seawater concentrations air mixing ratios Atlantic sector Ocean, along ∼ 11 000 km long...
Abstract Air‐sea carbon dioxide (CO 2 ) flux is generally estimated by the bulk method using upper ocean CO fugacity measurements. In summertime Arctic, sea‐ice melt results in stratification within (top ∼10 m), which can bias estimates when seawater taken from a ship's inlet at ∼6 m depth ( f 2w_bulk ). Direct measurements eddy covariance are unaffected near‐surface stratification. We use to infer sea surface 2w_surface Arctic Ocean. regions, values consistently lower than an average of 39...
Abstract The flux of terrigenous organic carbon through estuaries is an important and changing, yet poorly understood, component the global cycle. Using dissolved (DOC) fluorescence data from 13 British draining catchments with highly variable land uses, we show that use strongly influences fate DOC across ocean transition via its influence on composition lability constituent matter (DOM). In peatland‐dominated catchments, was correlated biologically refractory “humic‐like” material which...