Recent Publications

Weekly Highlighted Publication

Parasite and host biomass and reproductive output in barnacle populations in the rocky intertidal zone

Impact:
Here, we provide an initial insight into the role of parasites in rocky intertidal communities by examining how H. balani impacts Chthamalus fissus hosts and populations using the currencies of biomass and reproduction. Chthamalus fissus is a simultaneously hermaphroditic acorn barnacle susceptible to parasitism by H. balani that inhabits the high rocky intertidal zone. We first documented the relationship between body size and reproductive output for both individual hosts and parasites. We then applied these relationships to natural barnacle populations from 12 localities throughout Southern California, allowing us to express the impacts of parasitism at the population-level in terms of host and parasite standing-stock biomasses and reproductive outputs.

Search Recent Publications

  • Hondula DM, Balling RC, Vanos JK, Georgescu M.  2015.  Rising Temperatures, Human Health, and the Role of Adaptation. 1:144-154.
    Abstract Summary:

    There is near consensus in the scientific community that humans will experience higher future temperatures due to the ongoing accumulation of greenhouse gases in the atmosphere. The human response to this climatic change, particularly if accompanied by a surge in extreme heat events, is a key topic being addressed by scientists across many disciplines. In this article, we review recent (2012–2015) research on human health impacts of observed...

  • Abstract Summary:

    Wave climate in southeast Queensland, Australia has been correlated to changes in the Southern Oscillation Index (SOI), but observations of shoreline change associated with the variable wave climate have been limited due to a paucity of aerial photography, LiDAR, and other beach profiling datasets in this region. A multi-decadal, sub-annual temporal resolution shoreline dataset spanning 1996 to 2017 was produced using satellite imagery...

  • Abstract Summary:

    Mantle plume models have been widely applied to explain the formation of ocean island basalts (OIB), with high-3He/4He in their lavas being explained by sampling of a primitive deep mantle source. The Juan Fernandez Islands have 3He/4He (7.8–18 RA) similar to or higher than in mid-ocean ridge basalts (MORB; 8 ± 1 RA) and have been used to both support and refute the mantle plume hypothesis. Ambiguity regarding the origin of the Juan Fernandez...

  • Pernet-Fisher JF, Barry PH, Day JMD, D. Pearson G, Woodland S, Agashev AM, Pokhilenko LN, Pokhilenko NP.  2019.  Heterogeneous kimberlite metasomatism revealed from a combined He-Os isotope study of Siberian megacrystalline dunite xenoliths.
    Abstract Summary:

    The Siberian sub-continental lithospheric mantle (SCLM) is regionally heterogeneous due to the complex modification of ancient cratonic material by various metasomatic fluids and interaction with the Siberian plume at ∼250 Ma. Here, we assess the extent and origin of this heterogeneity by analysis of helium isotopes, rhenium-osmium isotopes, trace-element, and highly siderophile element [HSE: Os, Ir, Ru, Pt, Pd, Re] abundances in a suite of...

  • Amaya DJ, Kosaka Y, Zhou W, Zhang Y, Xie S-P, Miller AJ.  2019.  The North Pacific pacemaker effect on historical ENSO and its mechanisms.
    Abstract Summary:

    Studies have indicated that North Pacific sea surface temperature (SST) variability can significantly modulate the El Niño-Southern Oscillation (ENSO), but there has been little effort to put extratropical-tropical interactions into the context of historical events. To quantify the role of the North Pacific in pacing the timing and magnitude of observed ENSO, we use a fully-coupled climate model to produce an ensemble of North Pacific Ocean-...

  • Minich J, Petrus S, Michael JD, Michael TP, Knight R, Allen E.  2019.  Temporal, environmental, and biological drivers of the mucosal microbiome in a wild marine fish, Scomber japonicus.
    Abstract Summary:

    Changing ocean conditions driven by anthropogenic activity may have a negative impact on fisheries by increasing stress and disease with the mucosal microbiome as a potentially important intermediate role. To understand how environment and host biology drives mucosal microbiomes in a marine fish, we surveyed five body sites (gill, skin, digesta, GI, and pyloric caeca) from 229 Pacific chub mackerel, Scomber japonicus, collected across 38 time...

  • Polonik P., Chan W.S, Billesbach D.P, Burba G., Li J., Nottrott A., Bogoev I., Conrad B., Biraud S.C.  2019.  Comparison of gas analyzers for eddy covariance: Effects of analyzer type and spectral corrections on fluxes. Agricultural and Forest Meteorology. 272:128-142.
    Abstract Summary:

    The eddy covariance technique (EC) is used at hundreds of field sites worldwide to measure trace gas exchange between the surface and the atmosphere. Data quality and correction methods for EC have been studied empirically and theoretically for many years. The recent development of new gas analyzers has led to an increase in technological options for users. Open-path (no inlet tube) and closed-path (long inlet tube) sensors have been used for...

  • Kolody B.C, McCrow J.P, L. Allen Z, Aylward F.O, Fontanez K.M, Moustafa A., Moniruzzaman M., Chavez F.P, Scholin C.A, Allen EE et al..  2019.  Diel transcriptional response of a California Current plankton microbiome to light, low iron, and enduring viral infection.
    Abstract Summary:

    Phytoplankton and associated microbial communities provide organic carbon to oceanic food webs and drive ecosystem dynamics. However, capturing those dynamics is challenging. Here, an in situ, semi-Lagrangian, robotic sampler profiled pelagic microbes at 4 h intervals over ~2.6 days in North Pacific high-nutrient, low-chlorophyll waters. We report on the community structure and transcriptional dynamics of microbes in an operationally large...

  • Corringham T.W, Cayan DR.  2019.  The effect of El Nino on flood damages in the western United States. 11:489-504.
    Abstract Summary:

    This paper quantifies insured flood losses across the western United States from 1978 to 2017, presenting a spatiotemporal analysis of National Flood Insurance Program (NFIP) daily claims and losses over this period. While considerably lower (only 3.3%) than broader measures of direct damages measured by a National Weather Service (NWS) dataset, NFIP insured losses are highly correlated to the annual damages in the NWS dataset, and the NFIP...

  • Bellquist L., Beyer S., Arrington M., Maeding J., Siddall A., Fischer P., Hyde J., Wegner NC.  2019.  Effectiveness of descending devices to mitigate the effects of barotrauma among rockfishes (Sebastes spp.) in California recreational fisheries. 215:44-52.
    Abstract Summary:

    Fishes caught from depth often suffer from barotrauma, which can result in high mortality rates (close to 100% for some species) when released at the surface. To mitigate for this, the recreational fishing community proactively developed several different types of descending devices designed to assist unwanted or prohibited fish back toward the bottom for release. Post-release survival using recompression techniques has been documented for...

  • Martin D., Pititto F., Gil J., Mura M.P, Bahamon N., Romano C., Thorin S., Schvartz T., Dutrieux E., Bocquenet Y..  2019.  Long-distance influence of the Rhone River plume on the marine benthic ecosystem: Integrating descriptive ecology and predictive modelling. 673:790-809.
    Abstract Summary:

    The Gulf of Lions (GoL) is among the most productive areas of the Mediterranean Sea, with the Rhone River contributing with as much as 90% of the liquid and solid materials (including anthropogenic chemicals) reaching the area. In this paper, we assessed whether classical descriptive ecology and MaxEnt predictive species distribution modelling were able to provide complementary information when analysing the long-distance influence of the...

  • Rahib RR, Udry A, Howarth GH, Gross J, Paquet M, Combs LM, Laczniak DL, Day JMD.  2019.  Mantle source to near-surface emplacement of enriched and intermediate poikilitic shergottites in Mars.
    Abstract Summary:

    Poikilitic shergottites make up >20% of the current martian meteorite collection, with a total of 27 samples. These meteorites are intrusive gabbroic to lherzolitic rocks and represent igneous materials recording important processes in the martian crust. To further constrain petrogenetic relationships amongst enriched and intermediate poikilitic shergottites, we studied a comprehensive suite of poikilitic shergottites — including four...

  • Pommier A., Leinenweber K., Tran T..  2019.  Mercury's thermal evolution controlled by an insulating liquid outermost core? 517:125-134.
    Abstract Summary:

    The weak intrinsic magnetic field of Mercury is intimately tied to the structure and cooling history of its metallic core. Recent constraints about the planet's internal structure suggest the presence of a FeS layer overlying a silicon-bearing core. We performed 4-electrode resistivity experiments on core analogues up to 10 GPa and over wide temperature ranges in order to investigate the insulating properties of core materials. Our results...

  • Garcia E.SM, Sandwell DT, Bassett D..  2019.  Outer trench slope flexure and faulting at Pacific basin subduction zones. 218:708-728.
    Abstract Summary:

    Flexure and fracturing of the seafloor on the outer trench wall of subduction zones reflect bending of the lithosphere beyond its elastic limit. To investigate these inelastic processes, we have developed a full nonlinear inversion approach for estimating the bending moment, curvature and outer trench wall fracturing using shipboard bathymetry and satellite altimetry-derived gravity data as constraints. Bending moments and downward forces are...

  • Combs LM, Udry A, Howarth GH, Righter M, Lapen TJ, Gross J, Ross DK, Rahib RR, Day JMD.  2019.   Petrology of the enriched poikilitic shergottite Northwest Africa 10169: Insight into the martian interior.
    Abstract Summary:

    The martian meteorite Northwest Africa (NWA) 10169 is classified as a member of the geochemically enriched poikilitic shergottites, based on mineral composition, Lu-Hf and Sm-Nd isotope systematics, and rare earth element (REE) concentrations. Similar to other enriched and intermediate poikilitic shergottites, NWA 10169 is a cumulate rock that exhibits a bimodal texture characterized by large pyroxene oikocrysts (poikilitic texture)...

  • Pistone K, Eisenman I, Ramanathan V.  2019.  Radiative heating of an ice-free Arctic Ocean. 46:7474-7480.
    Abstract Summary:

    Abstract During recent decades, there has been dramatic Arctic sea ice retreat. This has reduced the top-of-atmosphere albedo, adding more solar energy to the climate system. There is substantial uncertainty regarding how much ice retreat and associated solar heating will occur in the future. This is relevant to future climate projections, including the timescale for reaching global warming stabilization targets. Here we use satellite...

  • Kranzler CF, Krause JW, Brzezinski MA, Edwards BR, Biggs WP, Maniscalco M, McCrow JP, Van Mooy BAS, Bidle KD, Allen AE et al..  2019.  Silicon limitation facilitates virus infection and mortality of marine diatoms.
    Abstract Summary:

    Diatoms are among the most globally distributed and ecologically successful organisms in the modern ocean, contributing upwards of 40% of total marine primary productivity1,2. By converting dissolved silicon into biogenic silica, and photosynthetically fixing carbon dioxide into particulate organic carbon, diatoms effectively couple the silicon (Si) and carbon cycles and ballast substantial vertical flux of carbon out of the euphotic zone...

  • Reynolds C.A, Doyle J.D, Ralph FM, Demirdjian R..  2019.  Adjoint sensitivity of North Pacific atmospheric river forecasts. Monthly Weather Review. 147:1871-1897.
    Abstract Summary:

    The initial-state sensitivity and optimal perturbation growth for 24- and 36-h forecasts of low-level kinetic energy and precipitation over California during a series of atmospheric river (AR) events that took place in early 2017 are explored using adjoint-based tools from the Coupled Ocean-Atmosphere Mesoscale Prediction System (COAMPS). This time period was part of the record-breaking winter of 2016-17 in which several high-impact ARs made...

  • Hill G.E, Havird J.C, Sloan D.B, Burton RS, Greening C., Dowling D.K.  2019.  Assessing the fitness consequences of mitonuclear interactions in natural populations. 94:1089-1104.
    Abstract Summary:

    Metazoans exist only with a continuous and rich supply of chemical energy from oxidative phosphorylation in mitochondria. The oxidative phosphorylation machinery that mediates energy conservation is encoded by both mitochondrial and nuclear genes, and hence the products of these two genomes must interact closely to achieve coordinated function of core respiratory processes. It follows that selection for efficient respiration will lead to...

  • Aguilera R., Gershunov A, Benmarhnia T..  2019.  Atmospheric rivers impact California's coastal water quality via extreme precipitation. Science of the Total Environment. 671:488-494.
    Abstract Summary:

    Precipitation in California is projected to become more volatile: less frequent but more extreme as global warming pushes midlatitude frontal cyclones further poleward while bolstering the atmospheric rivers (ARs), which tend to produce the region's extreme rainfall. Pollutant accumulation and delivery to coastal waters can be expected to increase, as lengthening dry spells will be increasingly punctuated by more extreme precipitation events...

  • Guirguis K., Gershunov A, Shulgina T., Clemesha R.ES, Ralph FM.  2019.  Atmospheric rivers impacting Northern California and their modulation by a variable climate. Climate Dynamics. 52:6569-6583.
    Abstract Summary:

    Understanding the role of climate variability in modulating the behavior of land-falling atmospheric rivers (ARs) is important for seasonal and subseasonal predictability for water resource management and flood control. We examine daily activity of ARs targeting the Northern California coast over six decades using observations of synoptic-scale circulation, high-resolution precipitation, and a long-term AR detection catalog to quantify...

  • Gilbert J.A, Lynch S.V.  2019.  Community ecology as a framework for human microbiome research. Nature Medicine. 25:884-889.
    Abstract Summary:

    The field of human microbiome research has revealed the intimate co-association of humans with diverse communities of microbes in various habitats in the human body, and the necessity of these microbes for the maintenance of human health. Microbial heterogeneity between humans and across spatial and temporal gradients requires multidimensional datasets and a unifying set of theories and statistical tools to analyze the human microbiome and...

  • Schorn MA, Jordan PA, Podell S, Blanton JM, Agarwal V, Biggs JS, Allen EE, Moore BS.  2019.  Comparative genomics of cyanobacterial symbionts reveals distinct, specialized metabolism in tropical Dysideidae sponges. 10
    Abstract Summary:

    Marine sponges are recognized as valuable sources of bioactive metabolites and renowned as petri dishes of the sea, providing specialized niches for many symbiotic microorganisms. Sponges of the family Dysideidae are well documented to be chemically talented, often containing high levels of polyhalogenated compounds, terpenoids, peptides, and other classes of bioactive small molecules. This group of tropical sponges hosts a high abundance of...

  • Richardson M., Gottel N., Gilbert J.A, Gordon J., Gandhi P., Reboulet R., Hampton-Marcell J.T.  2019.  Concurrent measurement of microbiome and allergens in the air of bedrooms of allergy disease patients in the Chicago area. 7
    Abstract Summary:

    The particulate and biological components of indoor air have a substantial impact on human health, especially immune respiratory conditions such as asthma. To better explore the relationship between allergens, the microbial community, and the indoor living environment, we sampled the bedrooms of 65 homes in the Chicago area using 23the patient-friendly Inspirotec electrokinetic air sampling device, which collects airborne particles for...

  • Sprintall J, Gordon A.L, Wijffels S.E, Feng M, Hu S.J, Koch-Larrouy A., Phillips H., Nugroho D., Napitu A., Pujiana K. et al..  2019.  Detecting change in the Indonesian Seas. 6
    Abstract Summary:

    The Indonesian seas play a fundamental role in the coupled ocean and climate system with the Indonesian Throughflow (ITF) providing the only tropical pathway connecting the global oceans. Pacific warm pool waters passing through the Indonesian seas are cooled and freshened by strong air-sea fluxes and mixing from internal tides to form a unique water mass that can be tracked across the Indian Ocean basin and beyond. The Indonesian seas lie at...

  • Abstract Summary:

    Marine biogeographic boundaries act as barriers to dispersal for many animal species, thereby creating distinctive faunas on either side. However, how such boundaries affect the distributions of microbial taxa remains poorly known. To test whether biogeographic boundaries influence the diversity and composition of host-associated microbiota, we analysed the microbiomes of three species of common intertidal gastropods at two sites separated by...

  • MacKinnon JA, Alford MH, Voet G, Zeiden K, Johnston T.M.Shaun, Siegelman M, Merrifield S, Merrifield M.  2019.  Eddy wake generation from broadband currents near Palau.
    Abstract Summary:

    Wake eddies are frequently created by flow separation where ocean currents encounter abrupt topography in the form of islands or headlands. Most previous work has concentrated on wake eddy generation by either purely oscillatory (usually tidal) currents, or quasi-steady mean flows. Here we report measurements near the point of flow separation at the northern end of the Palau island chain, where energetic tides and vertically sheared low-...

  • Benmarhnia T., Zhao X., Wang J., Macdonald M, Chen H..  2019.  Evaluating the potential public health impacts of the Toronto cold weather program. 127:381-386.
    Abstract Summary:

    Background: Extreme cold weather alert programs have been implemented in some areas to address the significant health impacts of exposure to cold. One such program is the Toronto Cold Weather Program (TCWP) that was implemented in the City of Toronto since 1996 to protect the public from extreme weather conditions. In this paper, we aim to evaluate the effectiveness of the TCWP in reducing mortality and morbidity outcomes related to cold...

  • Abstract Summary:

    Empirical orthogonal function (EOF) and fuzzy clustering tools were applied to generate and validate scenarios in operational ensemble prediction systems (EPSs) for U.S. East Coast winter storms. The National Centers for Environmental Prediction (NCEP), European Centre for Medium-Range Weather Forecasts (ECMWF), and Canadian Meteorological Centre (CMC) EPSs were validated in their ability to capture the analysis scenarios for historical East...

  • Pearlman J., Bushnell M., Coppola L., Karstensen J, Buttigieg P.L, Pearlman F., Simpsons P., Barbier M., Muller-Karger F.E, Munoz-Mas C. et al..  2019.  Evolving and sustaining ocean best practices and standards for the next decade. 6
    Abstract Summary:

    The oceans play a key role in global issues such as climate change, food security, and human health. Given their vast dimensions and internal complexity, efficient monitoring and predicting of the planet's ocean must be a collaborative effort of both regional and global scale. A first and foremost requirement for such collaborative ocean observing is the need to follow well-defined and reproducible methods across activities: from strategies...

  • Lewis V.M, Saunders L.M, Larson T.A, Bain E.J, Sturiale S.L, Gur D., Chowdhury S., Flynn J.D, Allen M.C, Deheyn DD et al..  2019.  Fate plasticity and reprogramming in genetically distinct populations of Danio leucophores. 116:11806-11811.
    Abstract Summary:

    Understanding genetic and cellular bases of adult form remains a fundamental goal at the intersection of developmental and evolutionary biology. The skin pigment cells of vertebrates, derived from embryonic neural crest, are a useful system for elucidating mechanisms of fate specification, pattern formation, and how particular phenotypes impact organismal behavior and ecology. In a survey of Danio fishes, including the zebrafish Danio rerio,...

  • Tilic E., Sermelwall S., Bartolomaeus T..  2019.  Formation and structure of paleae and chaetal arrangement in chrysopetalidae (Annelida). 138:209-220.
    Abstract Summary:

    Chrysopetalids, more specifically the subfamily Chrysopetalinae, are known for their characteristic, flattened, leaf-like notopodial chaetae. In many chrysopetalid species the animal's body is dorsally covered by these paleae that are arranged in rows similar to the blades of a folding fan. In this study we investigate and compare the chaetal arrangement in two chrysopetalids: Bhawania goodei Webster, 1884 and Chrysopetalum cf. occidentale...

  • Singleton D.M, Rockwell T.K, Murbach D., Murbach M., Maloney J.M, Freeman T., Levy Y..  2019.  Late-Holocene rupture history of the Rose Canyon Fault in Old Town, San Diego: Implications for cascading earthquakes on the Newport-Inglewood-Rose Canyon fault system. 109:855-874.
    Abstract Summary:

    We present new results from paleoseismic trenches excavated across the main trace of the Rose Canyon fault zone (RCFZ) in Old Town-San Diego, California, to determine the timing of late-Holocene earthquakes. There is evidence for four large surface-rupturing events, as well as two smaller events, the youngest of which cuts the early historical living surface that contains glass, ceramics, and a historical era foundation. This youngest event...

  • Tanner M.K, Moity N., Costa M.T, Jarrin J.RM, Aburto-Oropeza O, Salinas-de-Leon P..  2019.  Mangroves in the Galapagos: Ecosystem services and their valuation. 160:12-24.
    Abstract Summary:

    Mangroves provide many benefits to human welfare, but they are disappearing rapidly; Ecuador and countries within the Tropical Eastern Pacific (TEP) region have lost over 40% of their mangrove coverage in the last 40 years. One reason for this destruction is that the benefits of mangroves have not been valued in a way that policymakers and markets can understand. Here, we present the first economic valuation of multiple ecosystem services (ES...

  • Velasco-Hogan A, Deheyn DD, Koch M, Nothdurft B, Arzt E, Meyers MA.  2019.  On the nature of the transparent teeth of the deep-sea dragonfish, Aristostomias scintillans.
    Abstract Summary:

    The dragonfish is a voracious predator of the deep sea with an arsenal of tools to hunt prey and remain concealed. In contrast to its dark pigmented skin, the dragonfish is equipped with transparent teeth. Here, we establish the structure, composition, and mechanical properties of the transparent teeth for the first time. We find the enamel-like layer to consist of nanocrystalline hydroxyapatite domains (?20 nm grain size) embedded in an...

  • Abstract Summary:

    A new ascothoracidan species has been discovered in the Macaronesia region of the eastern Atlantic Ocean at SCUBA depths. Ten specimens including both sexes of the new species, described herein as Synagoga grygieri sp. nov., were collected from colonies of the antipatharian Antipathella wollastoni (Gray, 1857). Two previously described species of Synagoga, morphologically the most generalized ascothoracidan genus, were found as ectoparasites...

  • Pratt LJ, Voet G, Pacini A, Tan S, Alford MH, Carter GS, Girton JB, Menemenlis D.  2019.  Pacific Abyssal Transport and Mixing: Through the Samoan Passage versus around the Manihiki Plateau. 49:1577-1592.
    Abstract Summary:

    The main source feeding the abyssal circulation of the North Pacific is the deep, northward flow of 5–6 Sverdrups (Sv; 1 Sv ≡ 106 m3 s−1) through the Samoan Passage. A recent field campaign has shown that this flow is hydraulically controlled and that it experiences hydraulic jumps accompanied by strong mixing and dissipation concentrated near several deep sills. By our estimates, the diapycnal density flux associated with this mixing is...

  • Abstract Summary:

    In this study, we investigated the geomorphic and incision history for an similar to 5 km reach of the northern Rio Grande gorge in New Mexico using field and LiDAR-based geomorphic mapping and cosmogenic 3 He surface exposure dating. This wide (>1.5 km) and deep (similar to 240 m) section of the gorge exhibits Toreva blocks, incoherent landslides, rock falls, and slumps developed within Servilleta Basalts and intercalated weakly...

  • Lundesgaard O., Powell B., Merrifield M., Hahn-Woernle L., Winsor P..  2019.  Response of an Antarctic Peninsula fjord to summer katabatic wind events. 49:1485-1502.
    Abstract Summary:

    Fjords along the western Antarctic Peninsula are episodically exposed to strong winds flowing down marine-terminating glaciers and out over the ocean. These wind events could potentially be an important mechanism for the ventilation of fjord waters. A strong wind event was observed in Andvord Bay in December 2015, and was associated with significant increases in upper-ocean salinity. We examine the dynamical impacts of such wind events during...

  • Tinto K.J, Padman L., Siddoway C.S, Springer S.R, Fricker H.A, Das I., Tontini F.C, Porter D.F, Frearson N.P, Howard S.L et al..  2019.  Ross Ice Shelf response to climate driven by the tectonic imprint on seafloor bathymetry. 12:441-+.
    Abstract Summary:

    Ocean melting has thinned Antarctica's ice shelves at an increasing rate over the past two decades, leading to loss of grounded ice. The Ross Ice Shelf is currently close to steady state but geological records indicate that it can disintegrate rapidly, which would accelerate grounded ice loss from catchments equivalent to 11.6 m of global sea level rise. Here, we use data from the ROSETTA-Ice airborne survey and ocean simulations to identify...

  • Nannuru S., Gemba K.L, Gerstoft P, Hodgkiss WS, Mecklenbrauker C.F.  2019.  Sparse Bayesian learning with multiple dictionaries. Signal Processing. 159:159-170.
    Abstract Summary:

    Sparse Bayesian learning (SBL) has emerged as a fast and competitive method to perform sparse processing. The SBL algorithm, which is developed using a Bayesian framework, iteratively solves a non-convex optimization problem using fixed point updates. It provides comparable performance and is significantly faster than convex optimization techniques used in sparse processing. We propose a multi-dictionary SBL algorithm that simultaneously can...

  • Abstract Summary:

    The present article describes a numerical modeling study of the spatial distribution of the wave energy resource for Puerto Rico and the United States Virgin Islands (USVI). The study consists of an analysis of three years of output from the CARICOOS Nearshore Wave Model, an operational model based on the Simulating Waves Nearshore (SWAN) model. Using the wave model output, the wave power was computed and then averaged for a three year period...

  • Vittori G., Blondeaux P., Coco G., Guza RT.  2019.  Subharmonic edge wave excitation by narrow-band, random incident waves. 868
    Abstract Summary:

    A monochromatic, small amplitude, normally incident standing wave on a sloping beach is unstable to perturbation by subharmonic (half the frequency) edge waves. At equilibrium, edge wave shoreline amplitudes can exceed incident wave amplitudes. Here, the effect of incident wave randomness on subharmonic edge wave excitation is explored following a weakly nonlinear stability analysis under the assumption of narrow-band incident random waves....

  • Abstract Summary:

    Variability of North Atlantic annual hurricane frequency during 1951-2010 is studied using a 100-member ensemble of climate simulations by a 60-km atmospheric general circulation model that is forced by observed sea surface temperatures (SSTs). The ensemble mean results well capture the interannual-to-decadal variability of hurricane frequency in best track data since 1970, and suggest that the current best track data might underestimate...

  • Choy C.A, Robison B.H, Gagne T.O, Erwin B., Firl E., Halden R.U, Hamilton J.A, Katija K., Lisin S.E, Rolsky C. et al..  2019.  The vertical distribution and biological transport of marine microplastics across the epipelagic and mesopelagic water column. 9
    Abstract Summary:

    Plastic waste has been documented in nearly all types of marine environments and has been found in species spanning all levels of marine food webs. Within these marine environments, deep pelagic waters encompass the largest ecosystems on Earth. We lack a comprehensive understanding of the concentrations, cycling, and fate of plastic waste in sub-surface waters, constraining our ability to implement effective, large-scale policy and...

  • Abstract Summary:

    This study investigates the impact of internal variability on East Asian summer (June-July-August) surface air temperature (SAT) trends on the multidecadal time scale based on a 30-member ensemble of simulations that share the same external forcing from 1970 to 2005. The ensemble-mean SAT in East Asia shows a positive trend, but the patterns and the magnitudes in the individual members are remarkably diverse, highlighting the strong effect of...

  • de Morals M.G, de Morais E.G, Duarte J.H, Deamici K.M, Mitchell B.G, Costa J.AV.  2019.  Biological CO2 mitigation by microalgae: technological trends, future prospects and challenges. 35
    Abstract Summary:

    The increase in the CO2 concentration in the Earth's atmosphere has been a topic of worldwide concern since anthropogenic emissions of greenhouse gases began increasing considerably during the industrial period. The effects of these mass emissions are probably the main cause of global warming, which has been observed over recent decades. Among the various techniques of CO2 capture, microalgal biofixation by photosynthesis is considered a...

  • House B.M, Bebout G.E, Hilton DR.  2019.  Carbon cycling at the Sunda margin, Indonesia: A regional study with global implications. Geology. 47:483-486.
    Abstract Summary:

    The subduction and release of carbon at convergent margins is a primary mechanism by which tectonic processes influence atmospheric pCO(2), but the balance between the amount of carbon subducting and the CO2 flux from volcanic arcs remains poorly constrained. Estimating CO2 recycling efficiency in complex regions like the Sunda margin, Indonesia, is particularly difficult due to the lateral variability in sediment thickness, composition, and...

  • Stukel M.R, Kelly T.B, Aluwihare LI, Barbeau K.A, Goericke R, Krause J.W, Landry MR, Ohman MD.  2019.  The Carbon:(234)Thorium ratios of sinking particles in the California current ecosystem 1: relationships with plankton ecosystem dynamics. Marine Chemistry. 212:1-15.
    Abstract Summary:

    We investigated variability in the C:Th-234 ratio of sinking particles and its relationship to changing water column characteristics and plankton ecological dynamics during 29 Lagrangian experiments conducted on six cruises of the California Current Ecosystem Long-Term Ecological Research (CCE-LTER) Program. C:Th-234 ratios of sinking particles collected by a surface-tethered sediment trap ((CThST)-Th-:234) varied from 2.3 to 20.5 mu mol C...

  • Atwood S.A, Kreidenweis S.M, DeMott PJ, Petters M.D, Cornwell G.C, Martin A.C, Moore K.A.  2019.  Classification of aerosol population type and cloud condensation nuclei properties in a coastal California littoral environment using an unsupervised cluster model. Atmospheric Chemistry and Physics. 19:6931-6947.
    Abstract Summary:

    Aerosol particle and cloud condensation nuclei (CCN) measurements from a littoral location on the northern coast of California at Bodega Bay Marine Laboratory (BML) are presented for approximately six weeks of observations during the boreal winter-spring as part of the CalWater-2015 field campaign. The nature and variability of surface (marine boundary layer, MBL) aerosol populations were evaluated by classifying observations into periods of...