Personal information

Emails & domains

Verified email domains

Websites & social links

Cassar - Research Lab Website

Other IDs

Scopus Author ID: 6603417649
ResearcherID: B-4260-2011
Sciprofile: 1557662

Biography

Our research focuses on biogeochemistry and ecophysiology, with the objective of constraining the mechanisms governing carbon, oxygen and nitrogen cycling, and climate.

Activities

Collapse all

Employment (1)

Duke University: Durham, NC, US

2010-01-01 to present
Employment
Source: Self-asserted source
Nicolas Cassar

Works (50 of 81)

Items per page:
Page 1 of 2

Size‐Fractionated Primary Production Dynamics During the Decline Phase of the North Atlantic Spring Bloom

Global Biogeochemical Cycles
2024-07 | Journal article
DOI: 10.1029/2023GB008019
Contributors: Meredith G. Meyer; Mark A. Brzezinski; Melanie R. Cohn; Sasha J. Kramer; Nicola Paul; Garrett Sharpe; Alexandria K. Niebergall; Scott Gifford; Nicolas Cassar; Adrian Marchetti
Source: check_circle
Crossref

Evidence for Kilometer‐Scale Biophysical Features at the Gulf Stream Front

Journal of Geophysical Research: Oceans
2024-03 | Journal article
DOI: 10.1029/2023JC020526
Contributors: Patrick Clifton Gray; Ivan Savelyev; Nicolas Cassar; Marina Lévy; Emmanuel Boss; Yoav Lehahn; Guillaume Bourdin; Kate A. Thompson; Anna Windle; Jessica Gronniger et al.
Source: check_circle
Crossref

Evidence for kilometer-scale biophysical features at the Gulf Stream front

2023-09-27 | Preprint
DOI: 10.1101/2023.09.25.559383
Contributors: Patrick Clifton Gray; Ivan Savelyev; Nicolas Cassar; Marina Lévy; Emmanuel Boss; Yoav Lehahn; Guillaume Bourdin; Kate A. Thompson; Anna Windle; Jessica Gronniger et al.
Source: check_circle
Crossref

Microbial Respiration in Contrasting Ocean Provinces via High-Frequency Optical Assays

2023-07-20 | Preprint
DOI: 10.1101/2023.07.20.549894
Contributors: Melanie R. Cohn; Brandon Stephens; Meredith G. Meyer; Garrett Sharpe; Alexandria K. Niebergall; Jason R. Graff; Nicolas Cassar; Adrian Marchetti; Craig A. Carlson; Scott Gifford
Source: check_circle
Crossref

Multiscale Temporal Variability of the Global Air‐Sea CO2 Flux Anomaly

Journal of Geophysical Research: Biogeosciences
2023-06 | Journal article
DOI: 10.1029/2022JG006934
Contributors: Yuanyuan Gu; Gabriel G. Katul; Nicolas Cassar
Source: check_circle
Crossref

Open science resources from the Tara Pacific expedition across coral reef and surface ocean ecosystems

Scientific Data
2023-06-01 | Journal article
DOI: 10.1038/s41597-022-01757-w
Contributors: Fabien Lombard; Guillaume Bourdin; Stéphane Pesant; Sylvain Agostini; Alberto Baudena; Emilie Boissin; Nicolas Cassar; Megan Clampitt; Pascal Conan; Ophélie Da Silva et al.
Source: check_circle
Crossref

Primary production dynamics during the decline phase of the North Atlantic annual spring bloom

2023-05-18 | Preprint
DOI: 10.1101/2023.05.18.541304
Contributors: Meredith G. Meyer; Mark A. Brzezinski; Melanie R. Cohn; Sasha J. Kramer; Nicola Paul; Garrett Sharpe; Alexandria K. Niebergall; Scott Gifford; Nicolas Cassar; Adrian Marchetti
Source: check_circle
Crossref

The Impact of Gulf Stream Frontal Eddies on Ecology and Biogeochemistry near Cape Hatteras

2023-02-23 | Preprint
DOI: 10.1101/2023.02.22.529409
Contributors: Patrick Clifton Gray; Jessica Gronniger; Ivan Sayvelev; Julian Dale; Alexandria K. Niebergall; Nicolas Cassar; Anna E. Windle; Dana E. Hunt; Zackary Johnson; Marina Lévy et al.
Source: check_circle
Crossref

Can We Estimate Air‐Sea Flux of Biological O2 From Total Dissolved Oxygen?

Global Biogeochemical Cycles
2022-09 | Journal article
DOI: 10.1029/2021GB007145
Contributors: Yibin Huang; Rachel Eveleth; David Nicholson; Nicolas Cassar
Source: check_circle
Crossref

Inorganic and organic carbon and nitrogen uptake strategies of picoplankton groups in the northwestern Atlantic Ocean

Limnology and Oceanography
2021-10 | Journal article
DOI: 10.1002/lno.11909
Contributors: Hugo Berthelot; Solange Duhamel; Stéphane L'Helguen; Jean‐François Maguer; Nicolas Cassar
Source: check_circle
Crossref

Linking Southern Ocean Mixed‐Layer Dynamics to Net Community Production on Various Timescales

Journal of Geophysical Research: Oceans
2021-10 | Journal article
DOI: 10.1029/2021JC017537
Contributors: Zuchuan Li; M. Susan Lozier; Nicolas Cassar
Source: check_circle
Crossref

Decomposing the Oxygen Signal in the Ocean Interior: Beyond Decomposing Organic Matter

Geophysical Research Letters
2021-09-28 | Journal article
DOI: 10.1029/2021GL092621
Contributors: Nicolas Cassar; David Nicholson; Samar Khatiwala; Ellen Cliff
Source: check_circle
Crossref

Low diversity of a key phytoplankton group along the West Antarctic Peninsula

Limnology and Oceanography
2021-06 | Journal article
DOI: 10.1002/lno.11765
Contributors: Michael S. Brown; Jeff S. Bowman; Yajuan Lin; Colette J. Feehan; Carly M. Moreno; Nicolas Cassar; Adrian Marchetti; Oscar M. Schofield
Source: check_circle
Crossref

Global Estimates of Marine Gross Primary Production Based on Machine Learning Upscaling of Field Observations

Global Biogeochemical Cycles
2021-03 | Journal article
DOI: 10.1029/2020GB006718
Contributors: Yibin Huang; David Nicholson; Bangqin Huang; Nicolas Cassar
Source: check_circle
Crossref

Mesoscale Temporal Wind Variability Biases Global Air–Sea Gas Transfer Velocity of CO<sub>2</sub> and Other Slightly Soluble Gases

Remote Sensing
2021-03 | Journal article | Author
DOI: 10.3390/rs13071328
Contributors: Yuanyuan Gu; Gabriel G. Katul; Nicolas Cassar
Source: check_circle
Multidisciplinary Digital Publishing Institute
grade
Preferred source (of 2)‎

The Intensifying Role of High Wind Speeds on Air‐Sea Carbon Dioxide Exchange

Geophysical Research Letters
2021-03-16 | Journal article
DOI: 10.1029/2020GL090713
Contributors: Yuanyuan Gu; Gabriel G. Katul; Nicolas Cassar
Source: check_circle
Crossref

Lagrangian Studies of Marine Production: A Multimethod Assessment of Productivity Relationships in the California Current Ecosystem Upwelling Region

Journal of Geophysical Research: Oceans
2020-06 | Journal article
DOI: 10.1029/2019JC015984
Contributors: Sven A. Kranz; Seaver Wang; Thomas B. Kelly; Michael R. Stukel; Ralf Goericke; Michael R. Landry; Nicolas Cassar
Source: check_circle
Crossref

Lagrangian Studies of Net Community Production: The Effect of Diel and Multiday Nonsteady State Factors and Vertical Fluxes on O2/Ar in a Dynamic Upwelling Region

Journal of Geophysical Research: Biogeosciences
2020-06 | Journal article
DOI: 10.1029/2019JG005569
Contributors: Seaver Wang; Sven A. Kranz; Thomas B. Kelly; Hajoon Song; Michael R. Stukel; Nicolas Cassar
Source: check_circle
Crossref

Using global reanalysis data to quantify and correct airflow distortion bias in shipborne wind speed measurements

Atmospheric Measurement Techniques
2020-06-30 | Journal article
DOI: 10.5194/amt-13-3487-2020
Contributors: Sebastian Landwehr; Iris Thurnherr; Nicolas Cassar; Martin Gysel-Beer; Julia Schmale
Source: check_circle
Crossref

Trends in tuna carbon isotopes suggest global changes in pelagic phytoplankton communities

Global Change Biology
2020-02 | Journal article
DOI: 10.1111/gcb.14858
Contributors: Anne Lorrain; Heidi Pethybridge; Nicolas Cassar; Aurore Receveur; Valérie Allain; Nathalie Bodin; Laurent Bopp; C. Anela Choy; Leanne Duffy; Brian Fry et al.
Source: check_circle
Crossref

Lagrangian studies of marine production: a multi-method assessment of productivity relationships in the California Current Ecosystem upwelling region

2020-02-05 | Preprint
DOI: 10.1002/essoar.10502149.1
Contributors: Sven Alexander Kranz; Seaver Wang; Thomas B Kelly; Michael R Stukel; Ralf Goericke; Michael R. Landry; Nicolas Cassar
Source: check_circle
Crossref

Strategies among phytoplankton in response to alleviation of nutrient stress in a subtropical gyre

The ISME Journal
2019-12-01 | Journal article
DOI: 10.1038/s41396-019-0489-6
Contributors: Robert H Lampe; Seaver Wang; Nicolas Cassar; Adrian Marchetti
Source: check_circle
Crossref

Data‐Driven Modeling of the Distribution of Diazotrophs in the Global Ocean

Geophysical Research Letters
2019-11-16 | Journal article
DOI: 10.1029/2019GL084376
Contributors: Weiyi Tang; Nicolas Cassar
Source: check_circle
Crossref

Using global reanalysis data to quantify and correct airflow distortion bias in shipborne wind speed measurements

2019-10-01 | Preprint
DOI: 10.5194/amt-2019-366
Contributors: Sebastian Landwehr; Iris Thurnherr; Nicolas Cassar; Martin Gysel-Beer; Julia Schmale
Source: check_circle
Crossref

Machine Learning Estimates of Global Marine Nitrogen Fixation

Journal of Geophysical Research: Biogeosciences
2019-03 | Journal article
DOI: 10.1029/2018JG004828
Contributors: Weiyi Tang; Zuchuan Li; Nicolas Cassar
Source: check_circle
Crossref

NanoSIMS single cell analyses reveal the contrasting nitrogen sources for small phytoplankton

The ISME Journal
2019-03 | Journal article
DOI: 10.1038/s41396-018-0285-8
Contributors: Hugo Berthelot; Solange Duhamel; Stéphane L’Helguen; Jean-Francois Maguer; Seaver Wang; Ivona Cetinić; Nicolas Cassar
Source: check_circle
Crossref

Revisiting the distribution of oceanic N2 fixation and estimating diazotrophic contribution to marine production

Nature Communications
2019-02-19 | Journal article
DOI: 10.1038/s41467-019-08640-0
Contributors: Weiyi Tang; Seaver Wang; Debany Fonseca-Batista; Frank Dehairs; Scott Gifford; Aridane G. Gonzalez; Morgane Gallinari; Hélène Planquette; Géraldine Sarthou; Nicolas Cassar
Source: check_circle
Crossref

Theoretical Considerations on Factors Confounding the Interpretation of the Oceanic Carbon Export Ratio

Global Biogeochemical Cycles
2018-11 | Journal article
DOI: 10.1029/2018GB006003
Contributors: Zuchuan Li; Nicolas Cassar
Source: check_circle
Crossref

Net Community Production in the Southern Ocean: Insights From Comparing Atmospheric Potential Oxygen to Satellite Ocean Color Algorithms and Ocean Models

Geophysical Research Letters
2018-10-16 | Journal article
DOI: 10.1029/2018GL079575
Contributors: Cynthia Nevison; David Munro; Nicole Lovenduski; Nicolas Cassar; Ralph Keeling; Paul Krummel; Jerry Tjiputra
Source: check_circle
Crossref

Method for High Frequency Underway N2 Fixation Measurements: Flow-Through Incubation Acetylene Reduction Assays by Cavity Ring Down Laser Absorption Spectroscopy (FARACAS)

Analytical Chemistry
2018-02-20 | Journal article
DOI: 10.1021/acs.analchem.7b04977
Contributors: Nicolas Cassar; Weiyi Tang; Hans Gabathuler; Kuan Huang
Source: check_circle
Crossref

A mechanistic model of an upper bound on oceanic carbon export as a function of mixed layer depth and temperature

Biogeosciences
2017-11-14 | Journal article
DOI: 10.5194/bg-14-5015-2017
Contributors: Zuchuan Li; Nicolas Cassar
Source: check_circle
Crossref

A mechanistic model of an upper bound on oceanic carbon export as a function of mixed layer depth and temperature

2017-06-26 | Preprint
DOI: 10.5194/bg-2017-259
Contributors: Zuchuan Li; Nicolas Cassar
Source: check_circle
Crossref

Supplementary material to "A mechanistic model of an upper bound on oceanic carbon export as a function of mixed layer depth and temperature"

2017-06-26 | Preprint
DOI: 10.5194/bg-2017-259-supplement
Contributors: Zuchuan Li; Nicolas Cassar
Source: check_circle
Crossref

An Ultrahigh Precision, High-Frequency Dissolved Inorganic Carbon Analyzer Based on Dual Isotope Dilution and Cavity Ring-Down Spectroscopy

Environmental Science and Technology
2015 | Journal article
DOI: 10.1021/acs.est.5b01036
EID:

2-s2.0-84937400251
Contributors: Huang, K.; Cassar, N.; Jonsson, B.; Cai, W.-J.; Bender, M.L.
Source: Self-asserted source
Nicolas Cassar via Scopus - Elsevier

Marine diatom proteorhodopsins and their potential role in coping with low iron availability

ISME Journal
2015 | Journal article
DOI: 10.1038/ismej.2015.74
EID:

2-s2.0-84947614735
Contributors: Marchetti, A.; Catlett, D.; Hopkinson, B.M.; Ellis, K.; Cassar, N.
Source: Self-asserted source
Nicolas Cassar via Scopus - Elsevier

Physical-biogeochemical coupling in the southern ocean

Eos
2015 | Journal article
EID:

2-s2.0-84949552555
Contributors: Thompson, A.F.; Cassar, N.
Source: Self-asserted source
Nicolas Cassar via Scopus - Elsevier

Summertime physical and biological controls on O<inf>2</inf> and CO<inf>2</inf> in the Australian Sector of the Southern Ocean

Journal of Marine Systems
2015 | Journal article
DOI: 10.1016/j.jmarsys.2013.12.008
EID:

2-s2.0-84930182692
Contributors: Shadwick, E.H.; Tilbrook, B.; Cassar, N.; Trull, T.W.; Rintoul, S.R.
Source: Self-asserted source
Nicolas Cassar via Scopus - Elsevier

The relation of mixed-layer net community production to phytoplankton community composition in the Southern Ocean

Global Biogeochemical Cycles
2015 | Journal article
DOI: 10.1002/2014GB004936
EID:

2-s2.0-84929069896
Contributors: Cassar, N.; Wright, S.W.; Thomson, P.G.; Trull, T.W.; Westwood, K.J.; De Salas, M.; Davidson, A.; Pearce, I.; Davies, D.M.; Matear, R.J.
Source: Self-asserted source
Nicolas Cassar via Scopus - Elsevier

Correcting oceanic O<inf>2</inf>/Ar-net community production estimates for vertical mixing using N<inf>2</inf>O observations

Geophysical Research Letters
2014 | Journal article
DOI: 10.1002/2014GL062040
EID:

2-s2.0-84921781695
Contributors: Cassar, N.; Nevison, C.D.; Manizza, M.
Source: Self-asserted source
Nicolas Cassar via Scopus - Elsevier

Interannual sea-air CO2 flux variability from an observation-driven ocean mixed-layer scheme

Biogeosciences
2014 | Journal article
DOI: 10.5194/bg-11-4599-2014
EID:

2-s2.0-84906911942
Contributors: Rödenbeck, C.; Bakker, D.C.E.; Metzl, N.; Olsen, A.; Sabine, C.; Cassar, N.; Reum, F.; Keeling, R.F.; Heimann, M.
Source: Self-asserted source
Nicolas Cassar via Scopus - Elsevier
grade
Preferred source (of 2)‎

Late summer net community production in the central Arctic Ocean using multiple approaches

Global Biogeochemical Cycles
2014 | Journal article
DOI: 10.1002/2014GB004833
EID:

2-s2.0-84910112133
Contributors: Ulfsbo, A.; Cassar, N.; Korhonen, M.; Van Heuven, S.; Hoppema, M.; Kattner, G.; Anderson, L.G.
Source: Self-asserted source
Nicolas Cassar via Scopus - Elsevier

Neural network-based estimates of Southern Ocean net community production from in situ <br>O2/Ar and satellite observation: A methodological study

Biogeosciences
2014 | Journal article
DOI: 10.5194/bg-11-3279-2014
EID:

2-s2.0-84903206781
Contributors: Chang, C.-H.; Johnson, N.C.; Cassar, N.
Source: Self-asserted source
Nicolas Cassar via Scopus - Elsevier
grade
Preferred source (of 2)‎

Physical and biological controls on oxygen saturation variability in the upper Arctic Ocean

Journal of Geophysical Research C: Oceans
2014 | Journal article
DOI: 10.1002/2014JC009816
EID:

2-s2.0-84915751057
Contributors: Eveleth, R.; Timmermans, M.-L.; Cassar, N.
Source: Self-asserted source
Nicolas Cassar via Scopus - Elsevier

The influence of sea ice cover on air-sea gas exchange estimated with radon-222 profiles

Journal of Geophysical Research: Oceans
2014 | Journal article
DOI: 10.1002/2013JC009321
EID:

2-s2.0-84902842004
Contributors: Rutgers Van Der Loeff, M.M.; Cassar, N.; Nicolaus, M.; Rabe, B.; Stimac, I.
Source: Self-asserted source
Nicolas Cassar via Scopus - Elsevier

Interannual sea–air CO2 flux variability from an observation-driven ocean mixed-layer scheme

2014-02-25 | Preprint
DOI: 10.5194/bgd-11-3167-2014
Contributors: C. Rödenbeck; D. C. E. Bakker; N. Metzl; A. Olsen; C. Sabine; N. Cassar; F. Reum; R. F. Keeling; M. Heimann
Source: check_circle
Crossref

Supplementary material to "Interannual sea–air CO2 flux variability from an observation-driven ocean mixed-layer scheme"

2014-02-25 | Preprint
DOI: 10.5194/bgd-11-3167-2014-supplement
Contributors: C. Rödenbeck; D. C. E. Bakker; N. Metzl; A. Olsen; C. Sabine; N. Cassar; F. Reum; R. F. Keeling; M. Heimann
Source: check_circle
Crossref

An isotope dilution method for high-frequency measurements of dissolved inorganic carbon concentration in the surface ocean

Limnology and Oceanography: Methods
2013 | Journal article
DOI: 10.4319/lom.2013.11.572
EID:

2-s2.0-84890960305
Contributors: Huang, K.; Cassar, N.; Wanninkhof, R.; Bender, M.
Source: Self-asserted source
Nicolas Cassar via Scopus - Elsevier

Biological production in the Bellingshausen Sea from oxygen-to-argon ratios and oxygen triple isotopes

Biogeosciences
2013 | Journal article
DOI: 10.5194/bg-10-2273-2013
EID:

2-s2.0-84888796880
Contributors: Castro-Morales, K.; Cassar, N.; Shoosmith, D.R.; Kaiser, J.
Source: Self-asserted source
Nicolas Cassar via Scopus - Elsevier
grade
Preferred source (of 2)‎

Estimation of phytoplankton size fractions based on spectral features of remote sensing ocean color data

Journal of Geophysical Research: Oceans
2013 | Journal article
DOI: 10.1002/jgrc.20137
EID:

2-s2.0-84878910886
Contributors: Li, Z.; Li, L.; Song, K.; Cassar, N.
Source: Self-asserted source
Nicolas Cassar via Scopus - Elsevier

Iron fertilization enhanced net community production but not downward particle flux during the Southern Ocean iron fertilization experiment LOHAFEX

Global Biogeochemical Cycles
2013 | Journal article
DOI: 10.1002/gbc.20077
EID:

2-s2.0-84883199569
Contributors: Martin, P.; Van Der Loeff, M.R.; Cassar, N.; Vandromme, P.; D'Ovidio, F.; Stemmann, L.; Rengarajan, R.; Soares, M.; González, H.E.; Ebersbach, F. et al.
Source: Self-asserted source
Nicolas Cassar via Scopus - Elsevier
Items per page:
Page 1 of 2
How many people are using ORCID?