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

  • 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...

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    Reference points are used to determine whether overfishing is occurring, a stock is overfished, or the abundance of the stock is approaching an undesirable level. Reference points are often classified as limit reference points, which indicate an undesirable state, or target reference points, which specify a desirable one. Limit reference points frequently indicate a state for which the reproductive potential of the stock is impacted, and are...

  • Brandon JA, Jones W, Ohman MD.  2019.  Multidecadal increase in plastic particles in coastal ocean sediments. 5
    Abstract Summary:

    We analyzed coastal sediments of the Santa Barbara Basin, California, for historical changes in microplastic deposition using a box core that spanned 1834–2009. The sediment was visually sorted for plastic, and a subset was confirmed as plastic polymers via FTIR (Fourier transform infrared) spectroscopy. After correcting for contamination introduced during sample processing, we found an exponential increase in plastic deposition from 1945 to...

  • 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...

  • Abstract Summary:

    The origin of variations in Os-186/Os-188 ratios amongst mantle-derived basaltic and komatiitic lavas remains controversial, with opposing models arguing for deep core-mantle versus shallow mantle sources. Crustal contamination has generally not been favored due to the low Os contents of such sources, meaning that variations in Os-186/Os-188 would require involvement of extremely high proportions of crustal material. Here we re-examine...

  • Abstract Summary:

    Boat-towed radio-magnetotelluric (RMT) measurements using signals between 14 and 250 kHz have attracted increasing attention in the near-surface applications for shallow water and archipelago areas. A few large-scale underground infrastructure projects, such as the Stockholm bypass in Sweden, are planned to pass underneath such water zones. However, in cases with high water salinity, RMT signals have a penetration depth of a few metres and do...

  • Abstract Summary:

    To better understand the role of sulfide in C storage in the upper mantle, we construct a thermodynamic model for Fe-Ni-S-C sulfide melts and consider equilibrium between sulfide melts, mantle silicates, Fe-Ni alloy, and diamond. The sulfide melt model is based upon previous parameterization of Fe-Ni-S melts calibrated at 100 kPa, which we have extended to high pressure based on volumetric properties of end-member components. We calculate the...

  • Zhang Z.H, Pierce DW, Cayan DR.  2019.  A deficit of seasonal temperature forecast skill over west coast regions in NMME. 34:833-848.
    Abstract Summary:

    This study investigates the forecast skill of seasonal-mean near-surface (2 m) air temperature in the North American Multimodel Ensemble (NMME) Phase 2, with a focus on the West Coast of the United States. Overall, 1-month lead time NMME forecasts exhibit skill superior or similar to persistence forecasts over many continental regions, and skill is generally higher over the ocean than the continent. However, forecast skill along most West...

  • Cloud K.A, Reich B.J, Rozoff C.M, Alessandrini S., Lewis W.E, L. Monache D.  2019.  A feed forward neural network based on model output statistics for short-term hurricane intensity prediction. 34:985-997.
    Abstract Summary:

    A feed forward neural network (FFNN) is developed for tropical cyclone (TC) intensity prediction, where intensity is defined as the maximum 1-min average 10-m wind speed. This deep learning model incorporates a real-time operational estimate of the current intensity and predictors derived from Hurricane Weather Research and Forecasting (HWRF; 2017 version) Model forecasts. The FFNN model is developed with the operational constraint of being...

  • Abstract Summary:

    Geometric, kinematic and dynamic properties of focusing deep-water surface gravity wave packets are examined in a simplified model with the intent of deriving a wave breaking threshold parameter. The model is based on the spatial modified nonlinear Schrodinger equation of Dysthe (Proc. R. Soc. Lond. A, vol. 369 (1736), 1979, pp. 105-114). The evolution of initially narrow-banded and weakly nonlinear chirped Gaussian wave packets are examined...

  • Schlosser TL, Jones NL, Bluteau CE, Alford MH, Ivey GN, Lucas AJ.  2019.  Generation and propagation of near-inertial waves in a baroclinic current on the Tasmanian Shelf.
    Abstract Summary:

    Near-inertial waves (NIWs) are often an energetic component of the internal wave field on windy continental shelves. The effect of baroclinic geostrophic currents, which introduce both relative vorticity and baroclinicity, on NIWs is not well understood. Relative vorticity affects the resonant frequency, feff, while both relative vorticity and baroclinicity modify the minimum wave frequency of freely-propagating waves, ωmin. On a windy and...

  • Guazzo R.A, Schulman-Janiger A., Smith M.H, Barlow J, D’Spain G.L, Rimington D.B, Hildebrand JA.  2019.  Gray whale migration patterns through the Southern California Bight from multi-year visual and acoustic monitoring. 625:181-203.
    Abstract Summary:

    Sightings and acoustic recordings from eastern North Pacific gray whales in the Southern California Bight were analyzed for interannual changes and compared with concurrent environmental measurements during 7 migration seasons (2008-2009 to 2014-2015). Acoustic call counts recorded on an offshore hydrophone were highly variable from year to year. Assuming an average calling rate of 7.5 calls whale-1 d-1, the estimated...

  • 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...

  • Haustein K., Otto F.EL, Venema V., Jacobs P., Cowtan K., Hausfather Z., Way R.G, White B., Subramanian A., Schurer A.P.  2019.  A limited role for unforced internal variability in twentieth-century warming. 32:4893-4917.
    Abstract Summary:

    The early twentieth-century warming (EW; 1910-45) and the mid-twentieth-century cooling (MC; 1950-80) have been linked to both internal variability of the climate system and changes in external radiative forcing. The degree to which either of the two factors contributed to EW and MC, or both, is still debated. Using a two-box impulse response model, we demonstrate that multidecadal ocean variability was unlikely to be the driver of observed...

  • Diaz JM, Plummer S, Hansel CM, Andeer PF, Saito MA, McIlvin MR.  2019.  NADPH-dependent extracellular superoxide production is vital to photophysiology in the marine diatom Thalassiosira oceanica. 116:16448-16453.
    Abstract Summary:

    Superoxide and other reactive oxygen species (ROS) are commonly regarded as harmful progenitors of biological stress and death, but this view has been changing. Indeed, many phytoplankton actively generate extracellular superoxide under ideal growth conditions for reasons that are mysterious. Results from this study suggest that extracellular superoxide production by the marine diatom Thalassiosira oceanica may promote photosynthetic health...

  • Wang S.G, Constable S, Reyes-Ortega V., Rychert C.A.  2019.  A newly distinguished marine magnetotelluric coast effect sensitive to the lithosphere-asthenosphere boundary. 218:978-987.
    Abstract Summary:

    The marine magnetotelluric (MT) method is a useful tool for offshore studies aimed at, for example, hydrocarbon exploration and the understanding of Earth's tectonics. Marine MT data are often distorted by coastlines because of the strong resistivity contrast between the conductive ocean and the resistive land. At mid ocean ridges, the resistivity of Earth's structure can be assumed to be two-dimensional, which allows MT data to be decomposed...

  • 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-...

  • Mühle J, Trudinger C.M, Western L.M, Rigby M, Vollmer M.K, Park S., Manning A.J, Say D., Ganesan A., Steele LP et al..  2019.  Perfluorocyclobutane (PFC-318, c-C4F8) in the global atmosphere. 19:10335-10359.
    Abstract Summary:

    We reconstruct atmospheric abundances of the potent greenhouse gas c-C4F8 (perfluorocyclobutane, perfluorocarbon PFC-318) from measurements of in situ, archived, firn, and aircraft air samples with precisions of ∼1 %–2 % reported on the SIO-14 gravimetric calibration scale. Combined with inverse methods, we found near-zero atmospheric abundances from the early 1900s to the early 1960s, after which they rose sharply, reaching 1.66 ppt (parts...

  • Abstract Summary:

    In 2012, California completed its marine protected area (MPA) planning and designation process, yielding a network of 124 MPAs from the Mexican border to Oregon. The management effort that has followed is comprehensive and strategic, with a focus on scientific monitoring, interagency coordination, public education and outreach, and enforcement. Initial monitoring results show more and bigger fish, especially in older MPAs where the benefits...

  • Abstract Summary:

    Despite generally low primary productivity and diatom abundances in oligotrophic subtropical gyres, the North Atlantic Subtropical Gyre (NASG) exhibits significant diatom-driven carbon export on an annual basis. Subsurface pulses of nutrients likely fuel brief episodes of diatom growth, but the exact mechanisms utilized by diatoms in response to these nutrient injections remain understudied within near-natural settings. Here we simulated...

  • 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...

  • Johnson C.W, Vernon F, Nakata N., Ben-Zion Y..  2019.  Atmospheric processes modulating noise in Fairfield nodal 5 Hz geophones. 90:1612-1618.
    Abstract Summary:

    Atmospheric processes are documented to modulate seismic noise in Fairfield Nodal three-component geophones. Spectral analysis has shown high-amplitude signals between 40 and 50 Hz in all waveforms inspected. The changes in spectral amplitudes and frequency are found to be modified by daily variations in wind velocity and temperature, which are temporally correlated for much of the study. The wind velocity is shown to affect a wide spectral...

  • 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...

  • Valente A., Sathyendranath S., Brotas V., Groom S., Grant M., Taberner M., Antoine D., Arnone R., Balch W.M, Barker K. et al..  2019.  A compilation of global bio-optical in situ data for ocean-colour satellite applications - version two. 11:1037-1068.
    Abstract Summary:

    A global compilation of in situ data is useful to evaluate the quality of ocean-colour satellite data records. Here we describe the data compiled for the validation of the ocean-colour products from the ESA Ocean Colour Climate Change Initiative (OC-CCI). The data were acquired from several sources (including, inter alia, MOBY, BOUSSOLE, AERONET-OC, SeaBASS, NOMAD, MERMAID, AMT, ICES, HOT and GeP&CO) and span the period from 1997 to 2018...

  • 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...

  • Romero-Romero S., Choy C.A, Hannides C.CS, Popp BN, Drazen J.C.  2019.  Differences in the trophic ecology of micronekton driven by diel vertical migration. 64:1473-1483.
    Abstract Summary:

    Many species of micronekton perform diel vertical migrations (DVMs), which ultimately contributes to carbon export to the deep sea. However, not all micronekton species perform DVM, and the nonmigrators, which are often understudied, have different energetic requirements that might be reflected in their trophic ecology. We analyze bulk tissue and whole animal stable nitrogen isotopic compositions (delta N-15 values) of micronekton species...

  • Evan AT.  2019.  Downslope winds and dust storms in the Salton Basin. 147:2387-2402.
    Abstract Summary:

    The Salton basin is a closed, subsea level basin located in extreme southeastern California. At the center of the basin lies the Salton Sea, the state's largest inland lake, which is surrounded by a desert landscape characterized by paleo lakebed surfaces, dry washes, alluvial fans, and interdunes. Dust storms are common occurrence in this region. However, despite the regularity of dust outbreaks here, little is known about the meteorological...

  • Baggenstos D, Haberli M., Schmitt J., Shackleton S.A, Birner B., Severinghaus JP, Kellerhals T., Fischer H..  2019.  Earth's radiative imbalance from the Last Glacial Maximum to the present. 116:14881-14886.
    Abstract Summary:

    The energy imbalance at the top of the atmosphere determines the temporal evolution of the global climate, and vice versa changes in the climate system can alter the planetary energy fluxes. This interplay is fundamental to our understanding of Earth's heat budget and the climate system. However, even today, the direct measurement of global radiative fluxes is difficult, such that most assessments are based on changes in the total energy...

  • 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...

  • Abstract Summary:

    Since the publication of the compilation of biomass burning emission factors by Andreae and Merlet (2001), a large number of studies have greatly expanded the amount of available data on emissions from various types of biomass burning. Using essentially the same methodology as Andreae and Merlet (2001), this paper presents an updated compilation of emission factors. The data from over 370 published studies were critically evaluated and...

  • Abstract Summary:

    The Solomon Sea carries the equatorward western boundary current of the South Pacific, a principal element of subtropical-equatorial communication. Eighty-seven glider transects across the mouth of the Sea over nine years describe the velocity structure and variability of this system. The time series spans two El Ninos and two La Ninas, which produced large transport anomalies, up to 50% of the mean. While transport increased during El Ninos...

  • Heinze C, Eyring V., Friedlingstein P., Jones C., Balkanski Y, Collins W., Fichefet T., Gao S., Hall A., Ivanova D. et al..  2019.  ESD Reviews: Climate feedbacks in the Earth system and prospects for their evaluation. 10:379-452.
    Abstract Summary:

    Earth system models (ESMs) are key tools for providing climate projections under different scenarios of human-induced forcing. ESMs include a large number of additional processes and feedbacks such as biogeochemical cycles that traditional physical climate models do not consider. Yet, some processes such as cloud dynamics and ecosystem functional response still have fairly high uncertainties. In this article, we present an overview of climate...

  • Pattanayak S.K, Jeuland M., Lewis J.J, Usmani F., Brooks N., Bhojvaid V., Kar A., Lipinski L., Morrison L., Patange O. et al..  2019.  Experimental evidence on promotion of electric and improved biomass cookstoves. 116:13282-13287.
    Abstract Summary:

    Improved cookstoves (ICS) can deliver "triple wins" by improving household health, local environments, and global climate. Yet their potential is in doubt because of low and slow diffusion, likely because of constraints imposed by differences in culture, geography, institutions, and missing markets. We offer insights about this challenge based on a multiyear, multiphase study with nearly 1,000 households in the Indian Himalayas. In phase I,...

  • Abstract Summary:

    The deep biosphere is often characterized by multiple extreme physical-chemical conditions, of which pressure is an important parameter that influences life but remains less studied. This geomicrobiology study was designed to understand the response of a subterranean microbial community of the Deccan traps to high-pressure conditions and to elucidate their genomic properties. Groundwater from a deep basaltic aquifer of the Deccan traps was...

  • Shields J.E, Karr M.E.  2019.  Extinction imagers for measurements of atmospheric beam transmittance. 58:5486-5495.
    Abstract Summary:

    Optical beam transmittance for a horizontal path of sight through the atmosphere may be measured with transmissometers, which typically are double-ended, with source and a receiver at opposite ends of the path. Determination of the beam transmittance for longer paths is more challenging in some applications, such as monitoring the surround of a ship at sea or an urban environment. Extinction imaging is a new, to the best of our knowledge,...

  • Drushka K., Asher W.E, Sprintall J, Gille ST, Hoang C..  2019.  Global patterns of submesoscale surface salinity variability. 49:1669-1685.
    Abstract Summary:

    Surface salinity variability on O(1-10) km lateral scales (the submesoscale) generates density variability and thus has implications for submesoscale dynamics. Satellite salinity measurements represent a spatial average over horizontal scales of approximately 40-100 km but are compared to point measurements for validation, so submesoscale salinity variability also complicates validation of satellite salinities. Here, we combine several...

  • de Rond T., Gao J., Zargar A., de Raad M., Cunha J., Northen T.R, Keasling J.D.  2019.  A high-throughput mass spectrometric enzyme activity assay enabling the discovery of cytochrome P450 biocatalysts. 58:10114-10119.
    Abstract Summary:

    Assaying for enzymatic activity is a persistent bottleneck in biocatalyst and drug development. Existing high-throughput assays for enzyme activity tend to be applicable only to a narrow range of biochemical transformations, whereas universal enzyme characterization methods usually require chromatography to determine substrate turnover, greatly diminishing throughput. We present an enzyme activity assay that allows the high-throughput mass-...

  • Alessandrini S., Sperati S., L. Monache D.  2019.  Improving the analog ensemble wind speed forecasts for rare events. 147:2677-2692.
    Abstract Summary:

    An analog-based ensemble technique, the analog ensemble (AnEn), has been applied successfully to generate probabilistic predictions of meteorological variables, wind and solar power, energy demand, and the optimal bidding in the day-ahead energy market. The AnEn method uses a historical time series of past forecasts from a meteorological model or other prediction systems and observations of the quantity to be predicted. For each forecast lead...

  • Abstract Summary:

    Vulnerable marine ecosystems (VMEs) are considered hotspots of biodiversity and ecosystem functioning in the deep sea, but are also characterised by a high vulnerability to disturbance and a low recovery potential. Since 2006, a series of United Nations General Assembly (UNGA) resolutions have been developed, attempting to ensure the protection of VMEs in international waters. In the Northwest Atlantic Fisheries Organisation (NAFO) Regulatory...

  • Boas A.BV, Ardhuin F., Ayet A., Bourassa MA, Brandt P., Chapron B., Cornuelle BD, Farrar J.T, Fewings M.R, Fox-Kemper B. et al..  2019.  Integrated observations of global surface winds, currents, and waves: Requirements and challenges for the next decade. 6
    Abstract Summary:

    Ocean surface winds, currents, and waves play a crucial role in exchanges of momentum, energy, heat, freshwater, gases, and other tracers between the ocean, atmosphere, and ice. Despite surface waves being strongly coupled to the upper ocean circulation and the overlying atmosphere, efforts to improve ocean, atmospheric, and wave observations and models have evolved somewhat independently. From an observational point of view, community...

  • Alford MH, Simmons HL, Marques OB, Girton JB.  2019.  Internal tide attenuation in the North Pacific. 46:8205-8213.
    Abstract Summary:

    Multisatellite altimetry and an eddy-resolving model with tides are used to quantify the attenuation of the mode-1 M2 internal tide as it propagates from three major sources in the North Pacific. The model is used to correct the altimetric fluxes for the nonstationary signal that altimeters cannot detect. Because internal tides in the North Pacific are highly stationary, these corrections do not materially impact the decay rate estimates....

  • Brizuela N., Filonov A., Alford MH.  2019.  Internal tsunami waves transport sediment released by underwater landslides. 9
    Abstract Summary:

    Accelerated by gravity, submarine landslides transfer energy to the marine environment, most notably leading to catastrophic tsunamis. While tsunamis are thought to use less than 15% of the total energy released by landslides, little is known about subsurface processes comprising the rest of their energy budgets. Here, we analyze the first set of observations depicting a lake's interior response to underwater landslides and find that sediment...

  • Pohlker C., Walter D., Paulsen H., Konemann T., Rodriguez-Caballero E., Moran-Zuloaga D., Brito J., Carbone S., Degrendele C., Despres V.R et al..  2019.  Land cover and its transformation in the backward trajectory footprint region of the Amazon Tall Tower Observatory. 19:8425-8470.
    Abstract Summary:

    The Amazon rain forest experiences the combined pressures from human-made deforestation and progressing climate change, causing severe and potentially disruptive perturbations of the ecosystem's integrity and stability. To intensify research on critical aspects of Amazonian biosphere-atmosphere exchange, the Amazon Tall Tower Observatory (ATTO) has been established in the central Amazon Basin. Here we present a multi-year analysis of backward...

  • 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...

  • Pinardi N., Cessi P, Borile F., Wolfe C.LP.  2019.  The Mediterranean Sea overturning circulation. 49:1699-1721.
    Abstract Summary:

    The time-mean zonal and meridional overturning circulations of the entire Mediterranean Sea are studied in both the Eulerian and residual frameworks. The overturning is characterized by cells in the vertical and either zonal or meridional planes with clockwise circulations in the upper water column and counterclockwise circulations in the deep and abyssal regions. The zonal overturning is composed of an upper clockwise cell in the top 600 m...

  • 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...

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