Website: Gas Biogeochemistry Lab

Specialty

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)

Education

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)

Courses

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)

Publications

Juranek, L.W. (2022), Changing biogeochemistry of the Arctic Ocean: Surface nutrient and CO2 cycling in a warming, melting North. Oceanography. doi:10.5670/oceanog.2022.120

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, doi:10.1029/2021JC017664

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, doi:10.1029/2020GB006702

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, doi:10.1029/2020JC016160

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, doi:10.1029/2020JC016197

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, doi:10.1016/j.dsr2.2020.104781

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, doi:10.1016/j.marchem.2019.03.010

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, doi:10.1029/2018JC014568

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, doi:10.1029/2017JC012917

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, doi:10.1016/j.jmarsys.2018.03.007

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, doi: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, doi:10.1016/j.ecss.2016.08.043

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, doi:10.1002/2016GL068539

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, doi:10.1007/s00300-015-1800-2

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, doi:10.1002/2015GB005141

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), doi:10.1002/2013GL058267, 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, doi:10.1146/annurev-marine-121211-172430

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, doi:10.1029/2012GB004380

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