Office: 541-737-2368

Burt Hall

Burt Hall 216

2651 SW Orchard Avenue

2651 SW Orchard Avenue
Corvallis, OR 97331

Profile Field Tabs

Brief Research Interests: 

Dissolved gases, isotope biogeochemistry, marine biological pump, and marine carbon cycle




Dissolved gases, isotope biogeochemistry, marine biological pump, and marine carbon cycle

Current Research

Late Season Productivity, Carbon, and Nutrients in a Changing Arctic:

SCOPE-Gradients: Model-driven investigations of Oceanic Transition Zones:

Southern Ocean Carbon and Climate Modeling (SOCCOM):


1999                B.S. in Environmental Biology and Management, University of California, Davis

2003                M.S. in Chemical Oceanography, University of Washington, Seattle, WA 

2007                Ph.D. in Chemical Oceanography, University of Washington, Seattle, WA

2007-2009      NRC Postdoctoral fellow, NOAA PMEL (Carbon cycling and Ocean Acidification)


OEAS 540: The Biogeochemical Earth (Winter 2015, 2016, 2017, 2018, 2019, 2020)

GEO 484 : Introduction to Biogeochemistry (Winter 2013, 2014)

OC 599: Applications in Ocean Ecology and Biogeochemistry (Spring 2013, 2014)

OC334: Polar Oceanography (Spring 2020)

OC522: Biogeochemical Dynamics (Winter 2019)

Featured Stories

Medium matters: Making the case for middle-sized phytoplankton (April, 2021)
Altered Arctic (Terra, January, 2017)


Juranek, L.W. (2022), Changing biogeochemistry of the Arctic Ocean: Surface nutrient and CO2 cycling in a warming, melting North. Oceanography. 

Goni, M.A., L.W. Juranek, R.E. Sipler, K.A. Welch (2021). Particulate organic matter distributions in the water column of the Chukchi Sea during late summer. Hournal of Geophysical Research Oceans 126, e2021JC017664,

Juranek^, L.W., A.E. White^, M. Dugenne, F. Henderikx-Freitas, S. Dutkiewicz, F. Ribalet, S. Ferron, E.V. Armbrust, D.M. Karl, (2020) The importance of the phytoplankton ‘middle class’ to oceanic net community production,  Global Biogeochemical Cycles, 

Beaird, N., E. Shroyer, L. Juranek, B. Hales, and M. Goñi,(2020) Nutrient-rich dense gravity currents in Barrow Canyon formed by upwelling: high resolution observations,  J. Geophys. Res.-Oceans,  

Li, J. R.S. Pickart, P. Lin, F. Bahr, K.R. Arrigo, L. Juranek, and X. Yang, (2020), The Atlantic Water Boundary Current in the Chukchi Borderland and southern Canada Basin,  J. Geophys. Res.-Oceans,

Danielson, S., and 25 co-authors including L. Juranek, Manifestation and consequences of warming and altered heat fluxes over the Bering and Chukchi Sea continental shelves (2020), Deep Sea Res. II, 

Goñi, M.A., E.R. Corvi, K.A. Welch, M. Buktenica**, K. Lebon, Y. Alleau, L.W. Juranek (2019) Particulate Organic Matter Distributions in Surface Waters of the Pacific Arctic Shelf during the late Summer and Fall Season, Marine Chemistry 211, 

Juranek, L.W., T. Takahashi, J.T. Mathis, and R. Pickart (2019), Significant biologically-mediated CO2 uptake in the Pacific Arctic during the late open water season, J. Geophysical Research – Oceans, 124,

Williams, N.L.**, L.W.Juranek, R.A. Feely, J.L. Russell, K.S. Johnson, B. Hales (2018) Assessment of the Carbonate Chemistry Seasonal Cycles in the Southern Ocean From Persistent Observational Platforms, Journal of Geophys. Res. Oceans, 123, 

Martinez-Garcia, S., R.R. Bidigare, D.A. del Valle, L.W. Juranek, D.P. Nicholson, D.A. Viviani, S.T. Wilson, M.J. Church, (2018), Control of net community production by microbial community respiration at Station ALOHA, Journal of Marine Systems, 184, 28-35,

Williams, N.L.**, L.W. Juranek, R.A. Feely, K.S. Johnson, J.L. Sarmiento, L.D. Talley, A.G. Dickson, A.R. Gray, R. Wanninkhof, J.L. Russell, and S.C. Riser, (2017), Calculating surface ocean pCO2 from biogeochemical Argo floats equipped with pH: An uncertainty analysis, Global Biogeochem. Cycles, 31, 591–604, 10.1002/2016GB005541.

Feely, R.A., S.R. Alin, B. Carter, N. Bednarsek, B. Hales, F. Chan, T.M. Hill, B. Gaylord, E. Sanford, R.H. Byrne, C.L Sabine, D. Greeley, and L. Juranek (2016), Chemical and biological impacts of ocean acidification along the west coast of North America, Estuarine, Coastal, and Shelf Science xxx, 1-11,

Wanninkhof, R., K. Johnson, N. Williams**, J. Sarmiento, S. Riser, E. Briggs, S. Bushinsky, B. Carter, A. Dickson, R. Feely, A. Gray, L. Juranek, R. Key, L. Talley, J. Russel, and A. Verdy. (2016) An evaluation of pH and NO3 sensor data from SOCCOM floats and their utilization to develop ocean inorganic carbon products. SOCCOM Carbon System Working Group white paper, (to be assigned CDIAC and NOAA doi).

Williams, N.L.**, L.W. Juranek, K.S. Johnson, R.A. Feely, S.C. Riser, L.D. Talley, J.L. Russell, J. L. Sarmiento, and R. Wanninkhof (2016), Empirical algorithms to estimate water column pH in the Southern Ocean, Geophys.Res. Lett.,43,

Oxtoby, L.E., J. T. Mathis, L.W. Juranek, and M.J. Wooller (2015), Estimating stable carbon isotope values of microphytobenthos in the Arctic for application to foodweb studies, Polar Biology, 39(3), 473-483,

Wilson, S.T., B. Barone, F. Ascani, R.R. Bidigare, M.J. Church, D.A. delValle, S.T. Dhyrman, S. Ferron, J.N. Fitzsimmons, L.W. Juranek, Z.S. Kolber, R.M. Letelier, S Martinez-Garcia, D.P. Nicholson, K.J. Richards, Y.M. Rii, M. Rouco, D.A. Viviani, A.E. White, J. P, Zehr, and D. M. Karl (2015), Short-term variability in euphotic zone biogeochemistry and primary productivity at Station ALOHA: A case study summer 2012, Global Biogeochem. Cycles, 29, 1145-1164,

Munro, D.R, PD Quay, LW Juranek, and R Goericke, (2013), Biological production rates off the Southern California Coast estimated from triple O2 isotopes and O2:Ar gas ratios, Limnol. and Oceanogr., 58(4),1312-1328.

Hauri, C., P. Winsor, L. Juranek, A.M.P. McDonnell, T. Takahashi, and J.T. Mathis (2013) Wind-driven mixing causes a reduction in the strength of the continental shelf carbon pump in the Chukchi Sea, Geophys. Res. Lett., 40(22),, 5932–5936

Juranek, L.W., and P.D. Quay (2013), Using triple isotopes of dissolved oxygen to evaluate global marine productivity, Ann. Rev. Mar. Sci, 5, 503-524,

Lockwood, D., P.D. Quay, M.T. Kavanaugh, L.W. Juranek, and R.A. Feely (2012), High-resolution estimates of net community production and air-sea CO2 flux in the northeast Pacific, Global Biogeochem. Cycles, 26, GB4010,

Alin, S.R., S. Siedlecki, B. Hales, J. Mathis, W. Evans, M. Stukel, G. Gaxiola-Castro, J.M. Hernandez-Ayon, L. Juranek, M. Goñi, G. Turi, J. Needoba, E. Mayorga, Z. Lachkar, N. Gruber, J. Hartmann, N. Moosdorf, R. Feely, and F. Chavez (2012): Coastal carbon synthesis for the continental shelf of the North American Pacific Coast (NAPC): Preliminary results. Ocean Carbon and Biogeochemistry News, 5(1),

Juranek LW, PD  Quay, RA Feely, D Lockwood, DM Karl, and MJ Church, (2012) Biological production in the NE Pacific and its influence on air-sea CO2  flux: evidence from dissolved oxygen isotopes and O2 /Ar, J. Geophys. Res., 117, C05022, doi:10.1029/2011JC007450.

Alin, SR, RA Feely, AG Dickson, JM Hernández-Ayón, LW Juranek, MD Ohman, and R Goericke (2012), Robust empirical relationships for estimating the carbonate system in the southern California Current System and application to CalCOFI hydrographic cruise data (2005-2011), J. Geophys. Res., 117, C05033, doi:10.1029/2011JC007511.

Mathis, JT, RS Pickart, RH Byrne, CL McNeil, GWK Moore, LW Juranek, S Liu, J  Ma, RA Easley, MM Elliot, JN Cross, SC Reisdorph, F Bahr J Morison, T Lichendorf, RA Feely (2012), Storm-induced upwelling of high pCO2 waters onto the continental shelf of the Western Arctic Ocean and implications for carbonate mineral saturation states, Geophys. Res. Lett. 39, L07606, doi:10.1029/2012GL051574.

Juranek, LW, RA Feely, D Gilbert, H Freeland, L Miller (2011), Real-time estimation of pH and aragonite saturation state from Argo profiling floats: Prospects for an autonomous carbon observing strategy, Geophys. Res. Lett., 38, L17603, doi:10.1029/2011GL048580

Juranek, LW, and PD Quay (2010) Basin-wide primary production rates in the subtropical and tropical Pacific Ocean determined from dissolved oxygen isotope ratio measurements, Global Biogeochem. Cycles, 24, GB2006, doi:10.1029/2009GB003492.

Juranek, LW, R Hamme, J Kaiser, R Wanninkhof, and PD Quay (2010), Evidence of O2 consumption in underway seawater lines – implications for air-sea O2 and CO2 fluxes, Geophys. Res. Lett., 37, 1, doi:10.1029/2009GL040423.

Juranek, LW, RA Feely, WT Peterson, SL Alin, B Hales, K Lee, CL Sabine, J Peterson (2009), A novel method for determination of aragonite saturation state on the continental shelf of central Oregon using multi-parameter relationships with hydrographic data, Geophys. Res. Lett., 36, 24, doi:10.1029/2009GL040778.

D Ianson, RA Feely, CL Sabine, and LW Juranek (2009), Features of coastal upwelling regions that determine net air-sea CO2 flux, Journal of Oceanography, 65(5), 677-687.

Quay, PD, J Stutsman, RA Feely, and LW Juranek (2009), Net community production rates across the subtropical and equatorial Pacific Ocean estimated from air-sea d13C disequilibrium, Global Biogeochem. Cycles, 23, GB2006, doi:10.1029/2008GB003193.

Juranek LW, and PD Quay (2005), In vitro and in situ gross primary and net community production in the North Pacific Subtropical Gyre using labeled and natural abundance isotopes of dissolved O2, Global Biogeochem. Cycles, 19, GB3009, doi:10.1029/2004GB002384.

Sabine, CL, L Juranek, C Lee, D Nicholson, A Ver (2004), Understanding North Pacific Carbon Cycle Changes, Eos Trans. AGU, 85(42), 419, 10.1029/2004EO420006.

Juranek, LW, AD Russell and HJ Spero (2003), Seasonal oxygen and carbon isotope variability in Euthecosomatus pteropods from the Sargasso Sea. Deep Sea Res. I 50:231-245.


** graduate student author

^ authors contributed equally