Recent Publications

Weekly Highlighted Publication

Multiple meltwater discharge and ice rafting events recorded in the deglacial sediments along the Beaufort Margin, Arctic Ocean

Impact:
Thick, acoustically transparent Holocene sediment imaged from Barrow Canyon to the Mackenzie Trough indicates that discharge down Barrow Canyon and sediment from the Alaskan continent were important sources during this time period, possibly due to rivers reworking glacial sediment exposed by the retreat of glacier ice on the Brooks Range. Acoustically laminated sediments with coarser grain size and higher magnetic susceptibility underlie the Holocene unit. The acoustic reflectivity and thickness of this unit increases towards the Mackenzie Trough, suggesting that it is the main source of the acoustically laminated sediment, in addition to ice-rafted debris (IRD) from the Amundsen and M'Clure ice streams.

Search Recent Publications

  • Harada A.E, Burton RS.  2019.  Ecologically relevant temperature ramping rates enhance the protective heat shock response in an intertidal ectotherm. Physiological and Biochemical Zoology. 92:152-162.
    Abstract Summary:

    Thermal stress experiments are essential for understanding organisms' thermal limits and the physiological processes that contribute to establishing those limits. Experiments typically employ either an abrupt transfer to near-lethal temperatures or a gradually increasing thermal exposure. In the current study, we used three populations of the intertidal copepod Tigriopus californicus that are known to differ in upper thermal tolerance to...

  • Goodman N.B, Wheeler A.J, Paevere P.J, Agosti G., Nematollahi N., Steinemann A..  2019.  Emissions from dryer vents during use of fragranced and fragrance-free laundry products. Air Quality Atmosphere and Health. 12:289-295.
    Abstract Summary:

    Fragranced laundry products emit a range of volatile organic compounds, including hazardous air pollutants. Exposure to fragranced emissions from laundry products has been associated with adverse health effects such as asthma attacks and migraine headaches. Little is known about volatile emissions from clothes dryer vents and the effectiveness of strategies to reduce concentrations and risks. This study investigates volatile emissions from...

  • Kim S, Hammerstrom K, Dayton P..  2019.  Epifaunal community response to iceberg-mediated environmental change in McMurdo Sound, Antarctica. Marine Ecology Progress Series. 613:1-14.
    Abstract Summary:

    High-latitude marine communities are dependent on sea ice patterns. Sea ice cover limits light, and hence primary production and food supply. Plankton, carried by currents from open water to areas under the sea ice, provides a transitory food resource that is spatially and temporally variable. We recorded epifaunal abundances at 17 sites in McMurdo Sound, Antarctica, over 12 yr, and found differences in communities based on location and time...

  • Cakmak S., Hebbern C., Vanos J., Crouse D.L, Tjepkema M..  2019.  Exposure to traffic and mortality risk in the 1991-2011 Canadian Census Health and Environment Cohort (CanCHEC). Environment International. 124:16-24.
    Abstract Summary:

    There is evidence that local traffic density and living near major roads can adversely affect health outcomes. We aimed to assess the relationship between local road length, proximity to primary highways, and cause-specific mortality in the 1991 Canadian Census Health and Environment Cohort (CanCHEC). In this long-term study of 2.6 million people, based on completion of the long-form census in 1991 and followed until 2011, we used annual...

  • Stark J.S, Peltzer E.T, Kline DI, Queiros A.M, Cox T.E, Headley K., Barry J, Gazeau F., Runcie J.W, Widdicombe S. et al..  2019.  Free Ocean CO2 Enrichment (FOCE) experiments: Scientific and technical recommendations for future in situ ocean acidification projects. Progress in Oceanography. 172:89-107.
    Abstract Summary:

    Free Ocean CO2 Enrichment (FOCE) experiments are a relatively recent development in ocean acidification research, designed to address the need for in situ, long-term, community level experiments. FOCE studies have been conducted across different marine benthic habitats and regions, from Antarctica to the tropics. Based on this previous research we have formed some core operating principles that will aid those embarking on future FOCE...

  • de Verneil A., Franks PJS, Ohman MD.  2019.  Frontogenesis and the creation of fine-scale vertical phytoplankton structure. Journal of Geophysical Research-Oceans. 124:1509-1523.
    Abstract Summary:

    Fine-scale spatial structuring of phytoplankton patches has significant consequences for the marine food web, from altering phytoplankton exposure to surface light and limiting nutrients, to influencing the foraging of zooplankton, modifying carbon export, and impacting patterns of diversity. Hence, it is important to identify these fine-scale features and determine what generates their variability. Here we present evidence of fine-scale,...

  • Abstract Summary:

    Marine microorganisms are receiving more attention as a promising potential source of new natural products. In the present study, we performed genomic and metabolomic analyses to explore the metabolic potential of the obligate marine actinomycete genus Salinispora. The genomes of thirty Salinispora strains were prospected in search of biosynthetic gene clusters including polyketide synthase (PKS), nonribosomal peptide synthetase (NPRS),...

  • Abstract Summary:

    The evolution of intrinsic postzygotic isolation can be explained by the accumulation of Dobzhansky-Muller incompatibilities (DMI). Asymmetries in the levels of hybrid inviability and hybrid sterility are commonly observed between reciprocal crosses, a pattern that can result from the involvement of uniparentally inherited factors. The mitochondrial genome is one such factor that appears to participate in DMI in some crosses but the frequency...

  • DeFlorio M.J, Waliser D.E, Guan B., Ralph FM, Vitart F..  2019.  Global evaluation of atmospheric river subseasonal prediction skill. Climate Dynamics. 52:3039-3060.
    Abstract Summary:

    Subseasonal-to-Seasonal (S2S) forecasts of weather and climate extremes are being increasingly demanded by water resource managers, operational forecasters, and other users in the applications community. This study uses hindcast data from the European Centre for Medium-Range Weather Forecasts (ECMWF) S2S forecast system to evaluate global subseasonal prediction skill of atmospheric rivers (ARs), which are intense lower tropospheric plumes of...

  • Park Y., Gerstoft P, Seong W..  2019.  Grid-free compressive mode extraction. Journal of the Acoustical Society of America. 145:1427-1442.
    Abstract Summary:

    A grid-free compressive sensing (CS) based method for extracting the normal modes of acoustic propagation in the ocean waveguide from vertical line array (VLA) data is presented. Extracting the normal modes involves the estimation of mode horizontal wavenumbers and the corresponding mode shapes. Sparse representation of the waveguide propagation using modes at discrete horizontal wavenumbers enables CS to be applied. Grid-free CS, based on...

  • Northcott D., Sevadjian J., Sancho-Gallegos D.A, Wahl C., Friederich J., Chavez F.P.  2019.  Impacts of urban carbon dioxide emissions on sea-air flux and ocean acidification in nearshore waters. Plos One. 14
    Abstract Summary:

    Greatly enhanced atmospheric carbon dioxide (CO2) levels relative to well-mixed marine air are observed during periods of offshore winds at coastal sensor platforms in Monterey Bay, California, USA. The highest concentrations originate from urban and agricultural areas, are driven by diurnal winds, and peak in the early morning. These enhanced atmospheric levels can be detected across a similar to 100km wide nearshore area and represent a...

  • Oltmanns M., Straneo F, Tedesco M..  2019.  Increased Greenland melt triggered by large-scale, year-round cyclonic moisture intrusions. Cryosphere. 13:815-825.
    Abstract Summary:

    Surface melting is a major driver of Greenland's mass loss. Yet, the mechanisms that trigger melt are still insufficiently understood because seasonally based studies blend processes initiating melt with positive feedbacks. Here, we focus on the triggers of melt by examining the synoptic atmospheric conditions associated with 313 rapid melt increases, detected in a satellite-derived melt extent product, equally distributed throughout the year...

  • Wiedensohler A., Ma N., Birmili W., Heintzenberg J., Ditas F., Andreae M.O, Panov A..  2019.  Infrequent new particle formation over the remote boreal forest of Siberia. Atmospheric Environment. 200:167-169.
    Abstract Summary:

    Aerosol particle number size distributions (PNSD) were investigated to verify, if extremely low-volatility organic vapors (ELVOC) from natural sources alone could induce new particle formation and growth events over the remote boreal forest region of Siberia, hundreds of kilometers away from significant anthropogenic sources. We re-evaluated observations determined at a height of 300 m of the remote observatory ZOTTO (Zotino Tall Tower...

  • Zhou ZQ, Zhang R.H, Xie SP.  2019.  Interannual variability of summer surface air temperature over central India: Implications for monsoon onset. Journal of Climate. 32:1693-1706.
    Abstract Summary:

    Year-to-year variability of surface air temperature (SAT) over central India is most pronounced in June. Climatologically over central India, SAT peaks in May, and the transition from the hot premonsoon to the cooler monsoon period takes place around 9 June, associated with the northeastward propagation of intraseasonal convective anomalies from the western equatorial Indian Ocean. Positive (negative) SAT anomalies during June correspond to a...

  • Hu X.Y, Sprintall J, Yuan D.L, Tranchant B., Gaspar P., Koch-Larrouy A., Reffray G., Li X., Wang Z, Li Y. et al..  2019.  Interannual variability of the Sulawesi Sea circulation forced by Indo-Pacific planetary waves. Journal of Geophysical Research-Oceans. 124:1616-1633.
    Abstract Summary:

    The regional INDESO model configured in the Indonesian seas from 2008 to 2016 is used to study the mechanisms responsible for the variability of the currents in the Sulawesi Sea of the Indonesian seas. The model simulation compares reasonably with the seasonal to interannual variability of the moored current meter observations in the upper 350m or so of the Maluku Channel during 2015 and 2016. The interannual variability of the currents in...

  • Hosegood P.J, Nimmo-Smith W.AM, Proud R., Adams K., Brierley A.S.  2019.  Internal lee waves and baroclinic bores over a tropical seamount shark 'hot-spot'. Progress in Oceanography. 172:34-50.
    Abstract Summary:

    Oceanographic observations were made with a subsurface oceanographic mooring over the summit and flanks of two neighbouring seamounts in the tropical Indian Ocean to identify processes that may be responsible for the aggregation of silvertip sharks (Carcharhinus albimarginatus) in the deep water drop-off surrounding the summits. The seamounts, which are in the Chagos Archipelago in the British Indian Ocean Territories, are narrow in...

  • Wagner T.JW, Straneo F, Richards C.G, Slater D.A, Stevens L.A, Das S.B, Singh H..  2019.  Large spatial variations in the flux balance along the front of a Greenland tidewater glacier. Cryosphere. 13:911-925.
    Abstract Summary:

    The frontal flux balance of a medium-sized tidewater glacier in western Greenland in the summer is assessed by quantifying the individual components (ice flux, retreat, calving, and submarine melting) through a combination of data and models. Ice flux and retreat are obtained from satellite data. Submarine melting is derived using a high-resolution ocean model informed by near-ice observations, and calving is estimated using a record of...

  • Giron-Nava A., Johnson A.F, Cisneros-Montemayor A.M, Aburto-Oropeza O.  2019.  Managing at Maximum Sustainable Yield does not ensure economic well-being for artisanal fishers. Fish and Fisheries. 20:214-223.
    Abstract Summary:

    Maximum Sustainable Yield (MSY) is a common target for fisheries aiming to achieve long-term ecological sustainability. Although achieving MSY may ensure the long-term sustainability of fish populations, we ask whether it will provide economic security for fishers. Here we use 16 years of daily landing records to estimate potential catches and revenues per capita if fisheries were exploited at MSY in 11 subregions across Mexico. We then...

  • Hou X.M, Wang C.Y, Gerwick WH, Shao C.L.  2019.  Marine natural products as potential anti-tubercular agents. 165:273-292.
    Abstract Summary:

    Tuberculosis has been one of the greatest global health challenges of all time. Although the current first-line anti-tuberculosis (anti-TB) medicines used in the clinic have reduced mortality, multidrug-resistance and extensively drug-resistance forms of the disease have now spread worldwide and become a global problem. Even so, few new clinically approved drugs have emerged during the past 30 years. Highly biodiverse marine organisms have...

  • Peoples L.M, Grammatopoulou E., Pombrol M., Xu X.X, Osuntokun O., Blanton J., Allen EE, Nunnally C.C, Drazen J.C, Mayor D.J et al..  2019.  Microbial community diversity within sediments from two geographically separated hadal trenches. Frontiers in Microbiology. 10
    Abstract Summary:

    Hadal ocean sediments, found at sites deeper than 6,000 m water depth, are thought to contain microbial communities distinct from those at shallower depths due to high hydrostatic pressures and higher abundances of organic matter. These communities may also differ from one other as a result of geographical isolation. Here we compare microbial community composition in surficial sediments of two hadal environments-the Mariana and Kermadec...

  • Abstract Summary:

    Understanding community assembly and processes driving diversity in deep-sea environments is a major challenge in marine microbial ecology. The deep sea represents the largest ecosystem on Earth, but its remoteness makes the microbial community composition and functionality largely unknown. Moreover, microbial-focused studies comparing different deep-sea habitats like dynamic submarine canyons and slope ecosystems altogether are rare. The...

  • Manizza M, Menemenlis D., Zhang H, Miller C.E.  2019.  Modeling the recent changes in the Arctic Ocean CO2 sink (2006-2013). Global Biogeochemical Cycles. 33:420-438.
    Abstract Summary:

    The Arctic Ocean (AO) and its associated marginal seas have recently experienced rapid climate and environmental changes, most notably sea-ice area (SIA) loss and warming potentially impacting its uptake of carbon dioxide (CO2). We used the state-of-the-art ECCO2-Darwin coupled ocean-biogeochemistry model to simulate the 2006-2013 period and investigate the impact of changing SIA on the CO2 uptake of the AO. We find that the mean annual CO2...

  • Fang Y., Lakey P.SJ, Riahi S., McDonald A.T, Shrestha M., Tobias D.J, Shiraiwa M., Grassian VH.  2019.  A molecular picture of surface interactions of organic compounds on prevalent indoor surfaces: limonene adsorption on SiO2. Chemical Science. 10:2906-2914.
    Abstract Summary:

    Indoor surfaces are often coated with organic compounds yet a molecular understanding of what drives these interactions is poorly understood. Herein, the adsorption and desorption of limonene, an organic compound found in indoor environments, on hydroxylated silica (SiO2) surfaces, used to mimic indoor glass surfaces, is investigated by combining vibrational spectroscopy, atomistic computer simulations and kinetic modeling. Infrared...

  • Highlighted Publication Greenery among wetlands, photo courtesy NOAA
    Ezcurra E., Barrios E., Ezcurra P., Ezcurra A., Vanderplank S., Vidal O., Villanueva-Almanza L., Aburto-Oropeza O.  2019.  A natural experiment reveals the impact of hydroelectric dams on the estuaries of tropical rivers. Science Advances. 5
    Abstract Summary:

    We tested how sediment trapping by hydroelectric dams affects tropical estuaries by comparing two dammed and two undammed rivers on Mexico's Pacific coast. We found that dams demonstrably affected the stability and productivity of the estuaries. The two rivers dammed for hydroelectricity had a rapid coastal recession (between 7.9 and 21.5 ha year(-1)) in what should otherwise be an accretional coastline. The economic consequences of this dam-...

  • Behrenfeld M.J, Moore R.H, Hostetler C.A, Graff J., Gaube P., Russell LM, Chen G., Doney SC, Giovannoni S., Liu H.Y et al..  2019.  The North Atlantic Aerosol and Marine Ecosystem Study (NAAMES): Science motive and mission overview. Frontiers in Marine Science. 6
    Abstract Summary:

    The North Atlantic Aerosols and Marine Ecosystems Study (NAAMES) is an interdisciplinary investigation to improve understanding of Earth's ocean ecosystem-aerosol-cloud system. Specific overarching science objectives for NAAMES are to (1) characterize plankton ecosystem properties during primary phases of the annual cycle and their dependence on environmental forcings, (2) determine how these phases interact to recreate each year the...

  • Cai W.J, Wu L.X, Lengaigne M., Li T., McGregor S., Kug J.S, Yu J.Y, Stuecker M.F, Santoso A., Li X.C et al..  2019.  Pantropical climate interactions. Science. 363:944-+.
    Abstract Summary:

    The El Nino-Southern Oscillation (ENSO), which originates in the Pacific, is the strongest and most well-known mode of tropical climate variability. Its reach is global, and it can force climate variations of the tropical Atlantic and Indian Oceans by perturbing the global atmospheric circulation. Less appreciated is how the tropical Atlantic and Indian Oceans affect the Pacific. Especially noteworthy is the multidecadal Atlantic warming that...

  • Highlighted Publication Barnacles on a rock
    Fong C.R, Kuris A.M, Hechinger R.F.  2019.  Parasite and host biomass and reproductive output in barnacle populations in the rocky intertidal zone. Parasitology. 146:407-412.
    Abstract Summary:

    The rocky intertidal zone has a long history of ecological study with barnacles frequently serving as a model system to explore foundational theories. Parasites are often ignored in community ecology studies, and this particularly holds for true for the rocky intertidal zone. We explore the role of the isopod parasite, Hemioniscus balani, on its host, the acorn barnacle, Chthamalus fissus. We use the currencies of biomass and reproduction...

  • Soler-Jimenez L.C, Morales-Serna F.N, Aguirre-Macedo M.L, McLaughlin J.P, Jaramillo A.G, Shaw J.C, James A.K, Hechinger R.F, Kuris A.M, Lafferty K.D et al..  2019.  Parasitic copepods (Crustacea, Hexanauplia) on fishes from the lagoon flats of Palmyra Atoll, Central Pacific. Zookeys. :85-106.
    Abstract Summary:

    We surveyed copepods parasitic on the fishes at Palmyra, a remote atoll in the Central Indo-Pacific faunal region. In total, we collected 849 individual fish, representing 44 species, from the intertidal lagoon flats at Palmyra and recovered 17 parasitic copepod species. The parasitic copepods were: Orbitacolax williamsi on Mulloidichthys flavolineatus; Anuretes serratus on Acanthurus xanthopterus; Caligus confusus on Carangoides ferdau,...

  • Healy T.M, Schulte P.M.  2019.  Patterns of alternative splicing in response to cold acclimation in fish. Journal of Experimental Biology. 222
    Abstract Summary:

    Phenotypic plasticity is an important aspect of an organism's response to environmental change that often requires the modulation of gene expression. These changes in gene expression can be quantitative, as a result of increases or decreases in the amounts of specific transcripts, or qualitative, as a result of the expression of alternative transcripts from the same gene (e.g. via alternative splicing of pre-mRNAs). Although the role of...

  • Vanos J.K, Kosaka E., Iida A., Yokohari M., Middel A., Scott-Fleming J., Brown R.D.  2019.  Planning for spectator thermal comfort and health in the face of extreme heat: The Tokyo 2020 Olympic marathons. Science of the Total Environment. 657:904-917.
    Abstract Summary:

    The 2020 Olympic Games marathon will be run through the streets of Tokyo on the mornings of August 2nd and 9th, a time of year that is typically hot, sunny, and humid. Few studies have assessed the potential impact of extreme heat along the marathon course to understand the multiple factors (e.g., radiation, wind flow) affecting human thermal comfort (TC) as influenced by urban design and vegetation. The current research establishes a...

  • Fischer C., Lamer T., Wang W., McKinnie S.MK, Iturrioz X., Llorens-Cortes C., Oudit G.Y, Vederas JC.  2019.  Plasma kallikrein cleaves and inactivates apelin-17: Palmitoyl- and PEG-extended apelin-17 analogs as metabolically stable blood pressure-lowering agents. 166:119-124.
    Abstract Summary:

    Apelins are human peptide hormones with various physiological activities, including the moderation of cardiovascular, renal, metabolic and neurological function. Their potency is dependent on and limited by proteolytic degradation in the circulatory system. Here we identify human plasma kallikrein (KLKB1) as a protease that cleaves the first three N-terminal amino acids (KFR) of apelin-17. The cleavage kinetics are similar to neprilysin (NEP...

  • Feng D.M, Beighley E., Raoufi R., Melack J., Zhao Y.H, Iacobellis S., Cayan D.  2019.  Propagation of future climate conditions into hydrologic response from coastal southern California watersheds. Climatic Change. 153:199-218.
    Abstract Summary:

    As a biodiverse region under a Mediterranean climate with a mix of highly developed and natural watersheds, coastal Santa Barbara County (SB), located in southern California, is susceptible to the hydrologic impacts of climate change. This study investigates the potential changes in hydro-meteorological variables in this region as well as their societal and ecological implications for projected climate conditions during the twenty-first...

  • Heimbach P., Fukumori I., Hills C.N, Ponte R.M, Stammer D., Wunsch C., Campin J.M, Cornuelle B., Fenty I., Forget G. et al..  2019.  Putting it all together: Adding value to the global ocean and climate observing systems with complete self-consistent ocean state and parameter estimates. Frontiers in Marine Science. 6
    Abstract Summary:

    In 1999, the consortium on Estimating the Circulation and Climate of the Ocean (ECCO) set out to synthesize the hydrographic data collected by the World Ocean Circulation Experiment (WOCE) and the satellite sea surface height measurements into a complete and coherent description of the ocean, afforded by an ocean general circulation model. Twenty years later, the versatility of ECCO's estimation framework enables the production of global and...

  • Korte M., Brown M.C, Gunnarson S.R, Nilsson A, Panovska S., Wardinski I., Constable C.G.  2019.  Refining Holocene geochronologies using palaeomagnetic records. Quaternary Geochronology. 50:47-74.
    Abstract Summary:

    The aperiodic nature of geomagnetic field variations, both in intensity and direction, can aid in dating archaeological artefacts, volcanic rocks, and sediment records that carry a palaeomagnetic signal. The success of palaeomagnetic dating relies upon our knowledge of past field variations at specific locations. Regional archaeo- and palaeomagnetic reference curves and predictions from global geomagnetic field models provide our best...

  • Song HC, Byun G., Kim J.S.  2019.  Remote acoustic illumination using time reversal and a surface ship (L). Journal of the Acoustical Society of America. 145:1565-1568.
    Abstract Summary:

    Time-reversal (TR) transmission of the Green's function between a time-reversal mirror (TRM) and a probe source (PS) in an acoustic waveguide produces a spatio-temporal focus at the PS location. The TR focus then behaves as a virtual point source in the outbound direction with respect to the TRM. Further, a collection of adjacent TR focuses may constitute a virtual source array (VSA) that can serve as a remote platform, redirecting the...

  • Dias D.F, Subramanian A., Zanna L., Miller AJ.  2019.  Remote and local influences in forecasting Pacific SST: a linear inverse model and a multimodel ensemble study. Climate Dynamics. 52:3183-3201.
    Abstract Summary:

    A suite of statistical linear inverse models (LIMs) are used to understand the remote and local SST variability that influences SST predictions over the North Pacific region. Observed monthly SST anomalies in the Pacific are used to construct different regional LIMs for seasonal to decadal predictions. The seasonal forecast skills of the LIMs are compared to that from three operational forecast systems in the North American Multi-Model...

  • Gemba K.L, Nannuru S., Gerstoft P.  2019.  Robust ocean acoustic localization with sparse Bayesian learning. 13:49-60.
    Abstract Summary:

    Matched field processing (MFP) compares the measures to the modeled pressure fields received at an array of sensors to localize a source in an ocean waveguide. Typically, there are only a few sources when compared to the number of candidate source locations or range-depth cells. We use sparse Bayesian learning (SBL) to learn a common sparsity profile corresponding to the location of present sources. SBL performance is compared to traditional...

  • Abstract Summary:

    Analysis of the full genome of an environmentally unique, halotolerant Streptomyces sp. strain GSL-6C, isolated from the Great Salt Lake, revealed a gene cluster encoding the biosynthesis of the salinipeptins, D-amino-acid containing members of the rare linaridin subfamily of ribosomally synthesized and post-translationally modified peptides (RiPPs). The sequence organization of the unmodified amino acid residues in salinipeptins A D (1-4)...

  • Nie J., Xia Y., Hu S.N, Yuan W., Yang J., Ma D..  2019.  Similarity among atmospheric thermal stratifications over elevated surfaces under radiative-convective equilibrium. Geophysical Research Letters. 46:3512-3522.
    Abstract Summary:

    An air column under radiative-convective equilibrium is studied here to understand equilibrium climate over different surface elevations. Cloud-resolving model (CRM) simulations show that atmospheric thermal stratifications exhibit similar structures when expressed in sigma coordinates over varying surface elevations under radiative-convective equilibrium. A zero-buoyancy plume model that reproduces CRM results is used to interpret related...

  • Bakas N.A, Constantinou N.C, Ioannou P.J.  2019.  Statistical state dynamics of weak jets in barotropic beta-plane turbulence. Journal of the Atmospheric Sciences. 76:919-945.
    Abstract Summary:

    Zonal jets in a barotropic setup emerge out of homogeneous turbulence through a flow-forming instability of the homogeneous turbulent state (zonostrophic instability), which occurs as the turbulence intensity increases. This has been demonstrated using the statistical state dynamics (SSD) framework with a closure at second order. Furthermore, it was shown that for small supercriticality the flow-forming instability follows Ginzburg-Landau (G-...

  • Share P.E, Allam A.A, Ben-Zion Y., Lin F.C, Vernon FL.  2019.  Structural properties of the San Jacinto Fault Zone at Blackburn Saddle from seismic data of a dense linear array. Pure and Applied Geophysics. 176:1169-1191.
    Abstract Summary:

    We image the San Jacinto fault zone at Blackburn Saddle using earthquake waveforms recorded by a similar to 2-km across-fault linear array with 108 three-component sensors separated by similar to 10-30m. The length and spatiotemporal sampling of the array allow us to derive high-resolution information on the internal fault zone structure with spatial extent that can be merged with regional tomography models. Across-fault variations in...

  • Richert I., Yager P.L, Dinasquet J., Logares R., Riemann L., Wendeberg A., Bertilsson S., Scofield D.G.  2019.  Summer comes to the Southern Ocean: how phytoplankton shape bacterioplankton communities far into the deep dark sea. Ecosphere. 10
    Abstract Summary:

    During austral spring and summer, the coastal Antarctic experiences a sharp increase in primary production and a steepening of biotic and abiotic gradients that result from increased solar radiation and retreating sea ice. In one of the largest seasonally ice-free regions, the Amundsen Sea Polynya, pelagic samples were collected from 15 sites during a massive Phaeocystis antarctica bloom in 2010/2011. Along with a suite of other biotic and...

  • Highlighted Publication Marine observations map from JCOMMOPS
    Moore A.M, Martini M.J, Akella S., Arango H.G, Balmaseda M., Bertino L., Ciavatta S., Cornuelle B., Cummings J., Frolov S. et al..  2019.  Synthesis of ocean observations using data assimilation for operational, real-time and reanalysis systems: A more complete picture of the state of the ocean. Frontiers in Marine Science. 6
    Abstract Summary:

    Ocean data assimilation is increasingly recognized as crucial for the accuracy of real-time ocean prediction systems and historical re-analyses. The current status of ocean data assimilation in support of the operational demands of analysis, forecasting and reanalysis is reviewed, focusing on methods currently adopted in operational and real-time prediction systems. Significant challenges associated with the most commonly employed approaches...

  • Schlenger A.J, Libralato S., Ballance LT.  2019.  Temporal variability of primary production explains marine ecosystem structure and function. Ecosystems. 22:331-345.
    Abstract Summary:

    Understanding drivers of ecosystem structure and function is a pervasive goal in academic and applied research. We used 24 synthetic ecosystem-level indices derived from trophic models, and independently derived data for Net Primary Productivity, to investigate drivers of ecosystem structure and function for 43 marine ecosystems distributed in all oceans of the world and including coastal, estuaries, mid-ocean islands, open-ocean, coral reef...

  • Purkey S.G, Johnson G.C, Talley LD, Sloyan BM, Wijffels S.E, Smethie W., Mecking S., Katsumata K..  2019.  Unabated bottom water warming and freshening in the South Pacific Ocean. Journal of Geophysical Research-Oceans. 124:1778-1794.
    Abstract Summary:

    Abyssal ocean warming contributed substantially to anthropogenic ocean heat uptake and global sea level rise between 1990 and 2010. In the 2010s, several hydrographic sections crossing the South Pacific Ocean were occupied for a third or fourth time since the 1990s, allowing for an assessment of the decadal variability in the local abyssal ocean properties among the 1990s, 2000s, and 2010s. These observations from three decades reveal steady...

  • Decima M, Stukel M.R, Lopez-Lopez L., Landry MR.  2019.  The unique ecological role of pyrosomes in the Eastern Tropical Pacific. Limnology and Oceanography. 64:728-743.
    Abstract Summary:

    Pyrosomes are an important but often overlooked component of marine zooplankton communities, with limited existing information regarding their ecological and trophic roles in pelagic ecosystems. We present the first estimates of grazing and trophic interactions of the large tropical pyrosome, Pyrostremma spinosum, in the Eastern Tropical Pacific. While patchy in distribution, Pyrostremma spinosum's grazing impact was substantial, up to 17.5%...

  • Shrivastava M., Andreae M.O, Artaxo P., Barbosa H.MJ, Berg L.K, Brito J., Ching J., Easter RC, Fan J.W, Fast J.D et al..  2019.  Urban pollution greatly enhances formation of natural aerosols over the Amazon rainforest. Nature Communications. 10
    Abstract Summary:

    One of the least understood aspects in atmospheric chemistry is how urban emissions influence the formation of natural organic aerosols, which affect Earth's energy budget. The Amazon rainforest, during its wet season, is one of the few remaining places on Earth where atmospheric chemistry transitions between preindustrial and urban-influenced conditions. Here, we integrate insights from several laboratory measurements and simulate the...

  • Abstract Summary:

    Variation in thermal tolerance plays a key role in determining the biogeographic distribution of organisms. Consequently, identifying the mechanistic basis for thermal tolerance is necessary for understanding not only current species range limits but also the capacity for range limits to shift in response to climate change. Although variation in mitochondrial function likely contributes to variation in thermal tolerance, the extent to which...

  • Marcuson R., Gee J., Wei E., Driscoll N..  2019.  A 2000 year geomagnetic field record from the Gulf of Papua. Marine Geology. 408:48-66.
    Abstract Summary:

    A high resolution Holocene record of geomagnetic field direction and intensity in the Gulf of Papua was constructed using paleomagnetic data from eight piston cores collected in the region. The chronology of the cores was based largely on radiocarbon dates from benthic foraminifera. Correlation of seismic reflectors imaged in subbottom data between nearby cores was consistent with the chronostratigraphic framework based on radiocarbon dates...

  • Hammons J.C, Trzoss L., Jimenez P.C, Hirata A.S, Costa-Lotufo L.V, La Clair J.J, Fenical W.  2019.  Advance of seriniquinone analogues as melanoma agents. 10:186-190.
    Abstract Summary:

    Seriniquinone, a marine natural product, displayed potent cytotoxicity and selectivity against melanoma cancer cells. This selectivity, combined with a novel mode of action (MOA), prompted studies to translate a pharmacologically relevant lead. Herein, we report on structure-activity relationships (SARs), and provide a strategy to prepare analogues that retain activity and offer an improved water solubility and isomeric purity. From...