Search Results - "Humphreys, Matthew P"

PyCO2SYS v1.8: marine carbonate system calculations in Python by Humphreys, Matthew P, Lewis, Ernie R, Sharp, Jonathan D, Pierrot, Denis

“…Oceanic dissolved inorganic carbon (TC) is the largest pool of carbon that substantially interacts with the atmosphere on human timescales. Oceanic TC is…”
Get full text

The pH dependency of the boron isotopic composition of diatom opal (Thalassiosira weissflogii) by Donald, Hannah K, Foster, Gavin L, Fröhberg, Nico, Swann, George E. A, Poulton, Alex J, Moore, C. Mark, Humphreys, Matthew P

“…The high-latitude oceans are key areas of carbon and heat exchange between the atmosphere and the ocean. As such, they are a focus of both modern oceanographic…”
Get full text

Isotopic fractionation of carbon during uptake by phytoplankton across the South Atlantic subtropical convergence by Tuerena, Robyn E, Ganeshram, Raja S, Humphreys, Matthew P, Browning, Thomas J, Bouman, Heather, Piotrowski, Alexander P

“…The stable isotopic composition of particulate organic carbon (δ13CPOC) in the surface waters of the global ocean can vary with the aqueous CO2 concentration…”
Get full text

Impact of Nonzero Intercept Gas Transfer Velocity Parameterizations on Global and Regional Ocean–Atmosphere CO2 Fluxes by Ribas-Ribas, Mariana, Battaglia, Gianna, Humphreys, Matthew P., Wurl, Oliver

“…Carbon dioxide (CO2) fluxes between the ocean and atmosphere (FCO2) are commonly computed from differences between their partial pressures of CO2 (ΔpCO2) and…”
Get full text

Proton Binding Characteristics of Dissolved Organic Matter Extracted from the North Atlantic by Lodeiro, Pablo, Rey-Castro, Carlos, David, Calin, Humphreys, Matthew P., Gledhill, Martha

“…Marine dissolved organic matter (DOM) presents key thermodynamic properties that are not yet fully constrained. Here, we report the distribution of binding…”
Get full text

Climate sensitivity and the rate of ocean acidification: future impacts, and implications for experimental design by Humphreys, Matthew P.

“…The global mean surface temperature and partial pressure of carbon dioxide (CO2) are increasing both in the atmosphere and ocean. Oceanic CO2 uptake causes a…”
Get full text

Temperature effect on seawater fCO2 revisited: theoretical basis, uncertainty analysis and implications for parameterising carbonic acid equilibrium constants by Humphreys, Matthew P

“…The sensitivity of the fugacity of carbon dioxide in seawater (fCO2) to temperature (denoted υ, reported in %°C-1) is critical for the accurate fCO2…”
Get full text

Synthesis of In Situ Marine Calcium Carbonate Dissolution Kinetic Measurements in the Water Column by Cala, Ben A., Sulpis, Olivier, Wolthers, Mariette, Humphreys, Matthew P.

“…Calcium carbonate (CaCO3) dissolution is an integral part of the ocean's carbon cycle. However, laboratory measurements and ocean alkalinity budgets disagree…”
Get full text

Characterization of a Time-Domain Dual Lifetime Referencing pCO2 Optode and Deployment as a High-Resolution Underway Sensor across the High Latitude North Atlantic Ocean by Clarke, Jennifer S., Humphreys, Matthew P., Tynan, Eithne, Kitidis, Vassilis, Brown, Ian, Mowlem, Matthew, Achterberg, Eric P.

“…The ocean is a major sink for anthropogenic carbon dioxide (CO2), with the CO2 uptake causing changes to ocean chemistry. To monitor these changes and provide…”
Get full text

What drives the latitudinal gradient in open-ocean surface dissolved inorganic carbon concentration? by Wu, Yingxu, Hain, Mathis P, Humphreys, Matthew P, Hartman, Sue, Tyrrell, Toby

“…Previous work has not led to a clear understanding of the causes of spatial pattern in global surface ocean dissolved inorganic carbon (DIC), which generally…”
Get full text

Enhanced mercury reduction in the South Atlantic Ocean during carbon remineralization by Živković, Igor, Humphreys, Matthew P., Achterberg, Eric P., Dumousseaud, Cynthia, Woodward, E. Malcolm S., Bojanić, Natalia, Šolić, Mladen, Bratkič, Arne, Kotnik, Jože, Vahčič, Mitja, Obu Vazner, Kristina, Begu, Ermira, Fajon, Vesna, Shlyapnikov, Yaroslav, Horvat, Milena

“…Mercury (Hg) in seawater is subject to interconversions via (photo)chemical and (micro)biological processes that determine the extent of dissolved gaseous…”
Get full text

Geographical CO2 sensitivity of phytoplankton correlates with ocean buffer capacity by Richier, Sophie, Achterberg, Eric P., Humphreys, Matthew P., Poulton, Alex J., Suggett, David J., Tyrrell, Toby, Moore, Christopher Mark

“…Accumulation of anthropogenic CO2 is significantly altering ocean chemistry. A range of biological impacts resulting from this oceanic CO2 accumulation are…”
Get full text

Species-specific calcite production reveals Coccolithus pelagicus as the key calcifier in the Arctic Ocean by Daniels, Chris J., Poulton, Alex J., Young, Jeremy R., Esposito, Mario, Humphreys, Matthew P., Ribas-Ribas, Mariana, Tynan, Eithne, Tyrrell, Toby

“…Through the production and export of their calcite coccoliths, coccolithophores form a key component of the global carbon cycle. Despite this key role, very…”
Get full text

Controls on Open‐Ocean North Atlantic ΔpCO2 at Seasonal and Interannual Time Scales Are Different by Henson, Stephanie A., Humphreys, Matthew P., Land, Peter E., Shutler, Jamie D., Goddijn‐Murphy, Lonneke, Warren, Mark

“…The North Atlantic is a substantial sink for anthropogenic CO2. Understanding the mechanisms driving the sink's variability is key to assessing its current…”
Get full text

Physical and biogeochemical controls on the variability in surface pH and calcium carbonate saturation states in the Atlantic sectors of the Arctic and Southern Oceans by Tynan, Eithne, Clarke, Jennifer S., Humphreys, Matthew P., Ribas-Ribas, Mariana, Esposito, Mario, Rérolle, Victoire M.C., Schlosser, C., Thorpe, Sally E., Tyrrell, Toby, Achterberg, Eric P.

“…Polar oceans are particularly vulnerable to ocean acidification due to their low temperatures and reduced buffering capacity, and are expected to experience…”
Get full text

Dissolution of a submarine carbonate platform by a submerged lake of acidic seawater by Humphreys, Matthew P, Meesters, Erik H, de Haas, Henk, Karancz, Szabina, Delaigue, Louise, Bakker, Karel, Duineveld, Gerard, de Goeyse, Siham, Haas, Andreas F, Mienis, Furu, Ossebaar, Sharyn, van Duyl, Fleur C

“…Submarine sinkholes are found on carbonate platforms around the world. They are thought to form and grow when groundwater interactions generate conditions…”
Get full text

Production of dissolved organic carbon by Arctic plankton communities: Responses to elevated carbon dioxide and the availability of light and nutrients by Poulton, Alex J., Daniels, Chris J., Esposito, Mario, Humphreys, Matthew P., Mitchell, Elaine, Ribas-Ribas, Mariana, Russell, Benjamin C., Stinchcombe, Mark C., Tynan, Eithne, Richier, Sophie

“…The extracellular release of dissolved organic carbon (DOC) by phytoplankton is a potentially important source of labile organic carbon for bacterioplankton in…”
Get full text

Geographical CO 2 sensitivity of phytoplankton correlates with ocean buffer capacity by Richier, Sophie, Achterberg, Eric P, Humphreys, Matthew P, Poulton, Alex J, Suggett, David J, Tyrrell, Toby, Moore, Christopher Mark

“…Accumulation of anthropogenic CO is significantly altering ocean chemistry. A range of biological impacts resulting from this oceanic CO accumulation are…”
Get full text

RADIv1: a non-steady-state early diagenetic model for ocean sediments in Julia and MATLAB/GNU Octave by Sulpis, Olivier, Humphreys, Matthew P, Wilhelmus, Monica M, Carroll, Dustin, Berelson, William M, Menemenlis, Dimitris, Middelburg, Jack J, Adkins, Jess F

“…We introduce a time-dependent, one-dimensional model of early diagenesis that we term RADI, an acronym accounting for the main processes included in the model:…”
Get full text

Seasonal Water Mass Evolution and Non‐Redfield Dynamics Enhance CO2 Uptake in the Chukchi Sea by Ouyang, Zhangxian, Collins, Andrew, Li, Yun, Qi, Di, Arrigo, Kevin R., Zhuang, Yanpei, Nishino, Shigeto, Humphreys, Matthew P., Kosugi, Naohiro, Murata, Akihiko, Kirchman, David L., Chen, Liqi, Chen, Jianfang, Cai, Wei‐Jun

“…The Chukchi Sea is an increasing CO2 sink driven by rapid climate changes. Understanding the seasonal variation of air‐sea CO2 exchange and the underlying…”
Get full text