Research in MC&G ranges from the glacial history of the Antarctic ice sheet and the formation of surface films in the upper micron of the ocean to the cycling of carbon through various ocean reservoirs, the history of ocean circulation recorded in the growth bands of coral, and the role of hydrothermal vents and seawater-rock interactions on the composition of the oceans.

Recent Submissions

  • Occurrence and sources of radium in groundwater associated with oil fields in the southern San Joaquin Valley, California 

    McMahon, Peter B.; Vengosh, Avner; Davis, Tracy A.; Landon, Matthew K.; Tyne, Rebecca L.; Wright, Michael T.; Kulongoski, Justin T.; Hunt, Andrew G.; Barry, Peter H.; Kondash, Andrew J.; Wang, Zhen; Ballentine, Chris (American Chemical Society, 2019-08-07)
    Geochemical data from 40 water wells were used to examine the occurrence and sources of radium (Ra) in groundwater associated with three oil fields in California (Fruitvale, Lost Hills, South Belridge). 226Ra+228Ra activities ...
  • Evidence for microbial iron reduction in the methanic sediments of the oligotrophic southeastern Mediterranean continental shelf 

    Vigderovich, Hanni; Liang, Lewen; Herut, Barak; Wang, Fengping; Wurgaft, Eyal; Rubin-Blum, Maxim; Sivan, Orit (European Geosciences Union, 2019-08-23)
    Dissimilatory iron reduction is probably one of the oldest types of metabolisms that still participates in important biogeochemical cycles, such as those of carbon and sulfur. It is one of the more energetically favorable ...
  • Capturing coastal water clarity variability with Landsat 8 

    Luis, Kelly M.A.; Rheuban, Jennie E.; Kavanaugh, Maria T.; Glover, David M.; Wei, Jianwei; Lee, Zhongping; Doney, Scott C. (Elsevier, 2019-05-23)
    Coastal water clarity varies at high temporal and spatial scales due to weather, climate, and human activity along coastlines. Systematic observations are crucial to assessing the impact of water clarity change on aquatic ...
  • Active subseafloor microbial communities from Mariana back-arc venting fluids share metabolic strategies across different thermal niches and taxa 

    Trembath-Reichert, Elizabeth; Butterfield, David A.; Huber, Julie A. (Springer Nature, 2019-05-09)
    There are many unknowns regarding the distribution, activity, community composition, and metabolic repertoire of microbial communities in the subseafloor of deep-sea hydrothermal vents. Here we provide the first characterization ...
  • Characterizing the ecology of coral reef microorganisms across different scales within the Caribbean 

    Weber, Laura (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2020-02)
    Microorganisms sustain the high productivity of coral reefs and support one of the most diverse, valuable, and threatened ecosystems on Earth. Despite the importance of reef microorganisms, there is a lack of understanding ...
  • High rates of N-2 fixation in temperate, western North Atlantic coastal waters expand the realm of marine diazotrophy 

    Mulholland, Margaret R.; Bernhardt, Peter W.; Widner, Brittany; Selden, Corday; Chappell, Phoebe Dreux; Clayton, Sophie A.; Mannino, Antonio; Hyde, Kimberly J. W. (American Geophysical Union, 2019-06-10)
    Dinitrogen (N2) fixation can alleviate N limitation of primary productivity by introducing fixed nitrogen (N) to the world's oceans. Although measurements of pelagic marine N2 fixation are predominantly from oligotrophic ...
  • Ebullition of oxygen from seagrasses under supersaturated conditions 

    Long, Matthew H.; Sutherland, Kevin M.; Wankel, Scott D.; Burdige, David J.; Zimmerman, Richard C. (Wiley, 2019-08-08)
    Gas ebullition from aquatic systems to the atmosphere represents a potentially important fraction of primary production that goes unquantified by measurements of dissolved gas concentrations. Although gas ebullition from ...
  • Metabolite composition of sinking particles differs from surface suspended particles across a latitudinal transect in the South Atlantic 

    Johnson, Winifred M.; Longnecker, Krista; Kido Soule, Melissa C.; Arnold, William A.; Bhatia, Maya P.; Hallam, Steven J.; Van Mooy, Benjamin A. S.; Kujawinski, Elizabeth B. (Wiley, 2019-07-31)
    Marine sinking particles transport carbon from the surface and bury it in deep‐sea sediments, where it can be sequestered on geologic time scales. The combination of the surface ocean food web that produces these particles ...
  • Abiotic methane synthesis and serpentinization in olivine-hosted fluid inclusions 

    Klein, Frieder; Grozeva, Niya G.; Seewald, Jeffrey S. (National Academy of Sciences, 2019-09-03)
    The conditions of methane (CH4) formation in olivine-hosted secondary fluid inclusions and their prevalence in peridotite and gabbroic rocks from a wide range of geological settings were assessed using confocal Raman ...
  • Recent increases in water column denitrification in the seasonally suboxic bottom waters of the Santa Barbara Basin 

    White, Margot E.; Rafter, Patrick; Stephens, Brandon M.; Wankel, Scott D.; Aluwihare, Lihini I. (American Geophysical Union, 2019-06-11)
    Denitrification in the anoxic sediments of the Santa Barbara Basin has been well documented in the historic and modern record, but the regulation of and frequency with which denitrification occurs in the overlying water ...
  • Oxygen isotopes (delta O-18) trace photochemical hydrocarbon oxidation at the sea surface 

    Ward, Collin P.; Sharpless, Charles M.; Valentine, David L.; Aeppli, Christoph; Sutherland, Kevin M.; Wankel, Scott D.; Reddy, Christopher M. (American Geophysical Union, 2019-05-31)
    Although photochemical oxidation is an environmental process that drives organic carbon (OC) cycling, its quantitative detection remains analytically challenging. Here, we use samples from the Deepwater Horizon oil spill ...
  • Variations in rates of biological production in the Beaufort Gyre as the arctic changes: Rates from 2011 to 2016 

    Ji, Brenda Y.; Sandwith, Zoe O.; Williams, William J.; Diaconescu, Oana; Ji, Rubao; Li, Yun; Van Scoy, Emma; Yamamoto-Kawai, Michiyo; Zimmermann, Sarah; Stanley, Rachel H. R. (American Geophysical Union, 2019-04-30)
    The Arctic Ocean is experiencing profound environmental changes as the climate warms. Understanding how these changes will affect Arctic biological productivity is key for predicting future Arctic ecosystems and the global ...
  • A productivity collapse to end earth's great oxidation 

    Hodgskiss, Malcolm S. W.; Crockford, Peter W.; Peng, Yongbo; Wing, Boswell A.; Horner, Tristan J. (National Academy of Sciences, 2019-08-27)
    It has been hypothesized that the overall size of—or efficiency of carbon export from—the biosphere decreased at the end of the Great Oxidation Event (GOE) (ca. 2,400 to 2,050 Ma). However, the timing, tempo, and trigger ...
  • Extracellular superoxide production by key microbes in the global ocean 

    Sutherland, Kevin M.; Coe, Allison; Gast, Rebecca J.; Plummer, Sydney; Suffridge, Christopher; Diaz, Julia M.; Bowman, Jeff S.; Wankel, Scott D.; Hansel, Colleen M. (Wiley, 2019-07-10)
    Bacteria and eukaryotes produce the reactive oxygen species superoxide both within and outside the cell. Although superoxide is typically associated with the detrimental and sometimes fatal effects of oxidative stress, it ...
  • Underground gamma-ray measurements of radium isotopes from hydrothermal plumes in the deep Pacific Ocean 

    Hult, Mikael; Charette, Matthew A.; Lutter, Guillaume; Marissens, Gerd; Henderson, Paul B.; Sobiech-Matura, Katarzyna; Simgen, Hardy (Elsevier, 2019-07-31)
    The radium isotopes 226Ra and 228Ra can provide important data on the dynamics of deep-sea hydrothermal plumes that travel the oceans for decades and have great impact on the ocean chemistry. This study focuses on parameters ...
  • Towards integrating evolution, metabolism, and climate change studies of marine ecosystems 

    Baltar, Federico; Bayer, Barbara; Bednarsek, Nina; Deppeler, Stacy; Escribano, Ruben; Gonzalez, Carolina E.; Hansman, Roberta L.; Mishra, Rajani Kanta; Moran, Mary Ann; Repeta, Daniel J.; Robinson, Carol; Sintes, Eva; Tamburini, Christian; Valentin, Luis E.; Herndl, Gerhard J. (Elsevier, 2019-07-24)
    Global environmental changes are challenging the structure and functioning of ecosystems. However, a mechanistic understanding of how global environmental changes will affect ecosystems is still lacking. The complex and ...
  • NADPH-dependent extracellular superoxide production is vital to photophysiology in the marine diatom Thalassiosira oceanica 

    Diaz, Julia M.; Plummer, Sydney; Hansel, Colleen M.; Andeer, Peter F.; Saito, Mak A.; McIlvin, Matthew R. (National Academy of Sciences, 2019-08-13)
    Reactive oxygen species (ROS) like superoxide drive rapid transformations of carbon and metals in aquatic systems and play dynamic roles in biological health, signaling, and defense across a diversity of cell types. In ...
  • Dynamic regulation of extracellular superoxide production by the coccolithophore Emiliania huxleyi (CCMP 374) 

    Plummer, Sydney; Taylor, Alexander E.; Harvey, Elizabeth L.; Hansel, Colleen M.; Diaz, Julia M. (Frontiers Media, 2019-07-12)
    In marine waters, ubiquitous reactive oxygen species (ROS) drive biogeochemical cycling of metals and carbon. Marine phytoplankton produce the ROS superoxide (O2−) extracellularly and can be a dominant source of O2− in ...
  • Ocean time series observations of changing marine ecosystems: An era of integration, synthesis, and societal applications 

    Benway, Heather M.; Lorenzoni, Laura; White, Angelicque E.; Fiedler, Björn; Levine, Naomi M.; Nicholson, David P.; DeGrandpre, Michael D.; Sosik, Heidi M.; Church, Matthew J.; O'Brien, Todd D.; Leinen, Margaret S.; Weller, Robert A.; Karl, David M.; Henson, Stephanie A.; Letelier, Ricardo M. (Frontiers Media, 2019-07-12)
    Sustained ocean time series are critical for characterizing marine ecosystem shifts in a time of accelerating, and at times unpredictable, changes. They represent the only means to distinguish between natural and anthropogenic ...
  • Sea ice meltwater and Circumpolar Deep Water drive contrasting productivity in three Antarctic polynyas 

    Moreau, Sebastien; Lannuzel, Delphine; Janssens, Julie; Arroyo, Mar C.; Corkill, Matthew; Cougnon, Eva; Genovese, Cristina; Legresy, Benoit; Lenton, Andrew; Puigcorbé, Viena; Ratnarajah, Lavenia; Rintoul, Stephen R.; Roca-Martí, Montserrat; Rosenberg, Mark; Shadwick, Elizabeth H.; Silvano, Alessandro; Strutton, Peter G.; Tilbrook, Bronte (American Geophysical Union, 2019-03-28)
    In the Southern Ocean, polynyas exhibit enhanced rates of primary productivity and represent large seasonal sinks for atmospheric CO2. Three contrasting east Antarctic polynyas were visited in late December to early January ...

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