The global climate monitor system: from climate data-handling to knowledge dissemination     

Juan Mariano Camarillo-Naranjo  Natalia Limones-Rodríguez  María Fernanda Pita-López  Mónica Aguilar-Alba 《International Journal of Digital Earth》2019,12(4):394-414

This paper summarizes our work on building a data model and a geovisualization tool that provides access to global climate data: the Global Climate Monitor Web Viewer. Linked to this viewer, a complete set of climate-environmental indicators capable of displaying climate patterns on a global scale that is accessible to any potential user (scientists and laypeople) will be built and published using the same online application. The data currently available correspond to the CRU TS3.21 version of the Climate Research Unit (University of East Anglia) database – a product that provides data at a spatial resolution of half of a degree in latitude and longitude, spanning January 1901 to December 2012, on a monthly basis. Since January 2013, the datasets feeding the system have been the GHCN-CAMS temperature dataset and the Global Precipitation Climatology Centre (GPCC) First Guess precipitation dataset. Climatologists, hydrologists, planners and non-experts users such as media workers, policymakers, non-profit organizations, teachers or students, can access useful climatological information through the Global Climate Monitor system.  相似文献   

Community structure and functional traits of mollusks associated with coastal reef macroalgae in Northeastern Brazil     

Dbora Ferreira Barbosa  Thelma Lúcia Pereira Dias  Srgio de Faria Lopes  Rafaela Cristina de Souza Duarte  Fernanda Maria Duarte do Amaral 《Marine Ecology》2019,40(5)

This study investigated the community structure and functional traits of the mollusk fauna associated with macroalgae with different thallus morphologies in a reef environment in Northeastern Brazil. A total of 15 individuals of each species of macroalgae adhered to natural substrate and 15 individuals of Padina gymnospora detached from the substrate were collected. The structural complexity of algal habitats was measured and the associated malacofauna screened and identified. All three macroalgae differed significantly in the complexity of their habitat, with Sargassum polyceratium being the most complex. A total of 823 specimens of mollusks belonging to 22 species and 11 families were recorded, of which Columbellidae was the most represented with six species. The functional trait “size” revealed that micromollusks smaller than 10 millimeters were predominant in the community; however, individuals of larger sizes (up to 24.54 millimeters) belonging to young stages of other species were also present. Eight functional trophic groups were identified, of which “carnivorous” stood out with seven species. Six functional groups of microhabitats were identified, with intra‐specific variation in habitats, while habitat expansion was documented for species not yet recorded in association with macroalgae. The structure of the molluskan community differed among the three algae species with the greatest richness, abundance, and diversity of mollusks and functional traits occurring with S. polyceratium. Community structure differed between algae adhered to natural substrate and detached algae, with the latter having lower mollusk richness and diversity, but with greater abundance of some species that remained on algal fronds after release from the reef environment. This study reinforces the importance of algal habitat for marine invertebrate fauna, especially for micromollusks that spend their entire life cycle, or part of it, in association with macroalgae.  相似文献   

Salinity Biases and the Variability of the Atlantic Meridional Overturning Circulation in GFDL-CM3     

Matos  Fernanda D. A. O.  Pereira  Janini  Dengler  Marcus 《Ocean Science Journal》2020,55(4):505-520

Ocean Science Journal - The variability of the Atlantic Meridional Overturning Circulation (AMOC) and the Meridional Freshwater Transport (Mov) at 24°N, 11°S, and 30°S, simulated...  相似文献   

Contemporary Rates of Carbon Sequestration Through Vertical Accretion of Sediments in Mangrove Forests and Saltmarshes of South East Queensland,Australia     

Catherine E. Lovelock  Maria Fernanda Adame  Vicki Bennion  Matthew Hayes  Julian O’Mara  Ruth Reef  Nadia S. Santini 《Estuaries and Coasts》2014,37(3):763-771

Mangrove forests and saltmarshes are important habitats for carbon (C) sequestration in the coastal zone but variation in rates of C sequestration and the factors controlling sequestration are poorly understood. We assessed C sequestration in Moreton Bay, South East Queensland in mangrove forests and tidal marshes that span a range of environmental settings and plant communities, including mangrove forests and tidal marshes on the oligotrophic sand islands of the eastern side of Moreton Bay and on the nutrient enriched, western side of the bay adjacent to the city of Brisbane. We found that rates of C sequestration in sediments were similar among mangrove forests over the bay, despite large differences in the C density of sediments, because of different rates of vertical accretion of sediments. The C sequestration on the oligotrophic sand island tidal marshes, dominated by Juncus kraussii, had the highest rate of C sequestration in the bay while the western saltmarshes, which were dominated by Sarcocornia quinqueflora, had the lowest rate of C sequestration. Our data indicate C sequestration varies among different tidal wetland plant community types, due to variation in sediment characteristics and rates of sediment accretion over time.  相似文献   

Evidence of deep-water inflow in a tectonic window of the northern Apennines (Italy)   总被引：1，自引：0，他引：1  

F. Cervi  L. Borgatti  G. Martinelli  F. Ronchetti 《Environmental Earth Sciences》2014,72(7):2389-2409

Water samples from the river network and from some shallow and brackish springs located in a tectonic window of the northern Apennines of Italy were studied in the frame of a comprehensive hydrogeological investigation in order to better understand the origin and the mixing processes between the two water types noticed also in previous studies (Ca–HCO₃ and Na–Cl). A sampling campaign covering the drought period during year 2010 was planned to gather electric conductivity, temperature and redox potential data along the river network and on groundwater occurrences located inside the tectonic structure. Additionally, eight water samples were collected for hydrochemical (major anions and cations: Na⁺, K⁺, Ca²⁺, Mg²⁺, HCO₃ ^?, Cl^?, SO₄ ^2? and trace ion B_tot) and isotopic (δ¹⁸O, δ²H, ³H) analyses and compared with other eighteen samples from shallow and brackish springs collected near the study site during the period 2005–2012. Moreover, river discharge and water balance estimations were carried out. Results confirmed the presence of old Na–Cl water with salinity progressively increasing up to 5.5 g l^?1 at the northern termination of the tectonic window. These values are in agreement with the ions contents of the most mineralized spring (Macognano spring: salinity of 7.6 g l^?1), which has been considered as having the deepest and longest flow-path. Stable isotopes and trace ions contents are consistent with rainfall and snowmelt water mixed with brines associated with a hydrocarbon reservoir hosted at depth. Considering as end-member the more mineralized Na–Cl water, a cumulate inflow in the range of 12.9 ± 5.9 l s^?1 has been estimated. This aliquot is released into the river network with different mixing proportions by the groundwater occurrences discharging from the autochthonous flysch unit.  相似文献   

Responses of testate amoebae assemblages (Amoebozoa: Arcellinida) to recent volcanic eruptions,inferred from the sediment record in Laguna Verde,southern Patagonia,Argentina     

Charqueño-Celis  Fernanda  Sigala  Itzel  Zolitschka  Bernd  Pérez  Liseth  Mayr  Christoph  Massaferro  Julieta 《Journal of Paleolimnology》2022,67(2):115-129

Journal of Paleolimnology - There is little knowledge about testate amoebae in lakes and their responses to volcanic eruptions. To address this knowledge gap, we studied the paleoecology of these...  相似文献   

Metals from star-forming dwarfs: retention or ejection?     

Daniel Kunth  Françcois Legrand  Guillermo Tenorio-Tagle  Sergey Silich  J. Miguel Mas-Hesse  Miguel Cerviño 《Astrophysics and Space Science》2002,281(1-2):261-266

We show evidences that gas outflows occur in starburst galaxies as superbubbles evolve. We then question whether hot gas will be expelled and enrich the IGM with metals or be retained within the host galaxy. For this purpose we construct three extreme scenarios of the star formation histories for a sample of dwarf galaxies using either their present metallicity or their luminosity. The three scenarios imply different mechanical energy input rates, those are compared with theoretical lower limits for the ejection of processed matter out of host galaxies. The comparison strongly points at the existence of extended gaseous haloes acting as a barrier that allows these galaxies to retain their metals and enhance their abundance. Our findings strongly point that continuous star-forming processes, rather than coeval bursts, must contribute to the overall metallicity in our galaxy sample. This revised version was published online in September 2006 with corrections to the Cover Date.  相似文献   

Can stellar winds account for temperature fluctuations?     

Valentina Luridiana  Miguel Cerviño  Luc Binette 《Astrophysics and Space Science》2002,281(1-2):323-324

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Confidence Limits of Evolutionary Synthesis Models     

Miguel Cerviño  Valentina Luridiana 《Astrophysics and Space Science》2002,281(1-2):207-210

The probabilistic nature of the IMF in stellar systems implies that clusters of the same mass and age do not present the same unique values of their observed parameters. Instead they follow a distribution. We address the study of such distributions in terms of their confidence limits that can be obtained by evolutionary synthesis models. These confidence limits can be understood as the inherent uncertainties of synthesis models. We will compare such confidence limits arising from the discreteness of the number of stars obtained with Monte Carlo simulations with the dispersion resulting from an analytical formalism. We give some examples of the effects on the kinetic energy, V–K, EW(Hβ) and multiwavelength continuum. This revised version was published online in September 2006 with corrections to the Cover Date.  相似文献   

Regional climate change experiments over southern South America. II: Climate change scenarios in the late twenty-first century   总被引：1，自引：0，他引：1  

Mario N. Nuñez  Silvina A. Solman  Maria Fernanda Cabré 《Climate Dynamics》2009,32(7-8):1081-1095

We present an analysis of climate change over southern South America as simulated by a regional climate model. The regional model MM5 was nested within time-slice global atmospheric model experiments conducted by the HadAM3H model. The simulations cover a 10-year period representing present-day climate (1981–1990) and two future scenarios for the SRESA2 and B2 emission scenarios for the period 2081–2090. There are a few quantitative differences between the two regional scenarios. The simulated changes are larger for the A2 than the B2 scenario, although with few qualitative differences. For the two regional scenarios, the warming in southern Brazil, Paraguay, Bolivia and northeastern Argentina is particularly large in spring. Over the western coast of South America both scenarios project a general decrease in precipitation. Both the A2 and B2 simulations show a general increase in precipitation in northern and central Argentina especially in summer and fall and a general decrease in precipitation in winter and spring. In fall the simulations agree on a general decrease in precipitation in southern Brazil. This reflects changes in the atmospheric circulation during winter and spring. Changes in mean sea level pressure show a cell of increasing pressure centered somewhere in the southern Atlantic Ocean and southern Pacific Ocean, mainly during summer and fall in the Atlantic and in spring in the Pacific. In relation to the pressure distribution in the control run, this indicates a southward extension of the summer mean Atlantic and Pacific subtropical highs.  相似文献