This study was supported by IMARPE(Peru), the research unit LOCEAN‐IPSL (UMR 7192 CNRS/IRD/UPMC/MNHN) in France and the projects JEAI MIXPALEO,PALEOPECES, PALEOTRACES, DISCOH, PCCC and the‘CátedraCONCYTEC en Ciencias del Mar’. We thank Jorge Vasquez (JPL) for pro-viding the 4km resolution GHRSST‐PP SST data and David Correa forperforming the objective interpolation of these data. Finally, we thankFrancisco Chavez and Monique Messié, with whom we sustained sounddiscussions that helped us for the preparation of this paper.

In this work we evaluate the tecnical alkaline, using the Reactive Carbonate-Soda adkacent so that we could make lhe separation and identlfication of Metals in solids specimens as minerals, silicates, etc. Deterrnination the most frequents elements in the Nature.

En este trabajo se ha evaluado la técnica alcalina, usando el carbonato de sodio como reactivo de separación e identificación de metales y no metales, en muestras sólidas como minerales, silicatos y arcillas, determinando elementos químicos más frecuentes en la Naturaleza.

Background: Faced with the resurgence of malaria, malaria surveillance in the Peruvian Amazon incorporated consecutive active case detection (ACD) interventions using light microscopy (LM) as reactive measure in communities with an unusual high number of cases during high transmission season (HTS). We assessed the effectiveness in malaria detection of this local ACD-based strategy. Methods: A cohort study was conducted in June–July 2015 in Mazan, Loreto. Four consecutive ACD interventions at intervals of 10 days were conducted in four riverine communities (Gamitanacocha, Primero de Enero, Libertad and Urco Miraño). In each intervention, all inhabitants were visited at home, and finger-prick blood samples collected for immediate diagnosis by LM and on filter paper for later analysis by quantitative real-time polymerase chain reaction (qPCR). Effectiveness was calculated by dividing the...

El objetivo principal de la presente investigación es analizar y evaluar como la Metodología BIM se puede aplicar en la fase de diseño de una estructura de Vivienda Unifamiliar en el distrito de Sullana. Para esto se ha tomado un proyecto de edificación desarrollado con el método tradicional para desarrollarlo utilizando las herramientas de BIM. Para el modelamiento de la estructura de vivienda unifamiliar se utilizó el Software Autodesk Revit 2024, en el cual se obtuvo la documentación posteriormente presentada donde nos otorga la información detallada de la estructura, evidenciando también las incompatibilidades y las comparaciones entre la metodología tradicional y cuando se aplica la Metodología BIM. De igual forma se evaluaron las características del proyecto piloto basándose en las condiciones requeridas en la Norma A.010 CONDICIONES GENERALES DE DISEÑO del Reglamento...

The seasonal influence of tidal regimes on sulfidic conditions was studied in intertidal environments from a mangrove estuary in Northern Peru. Along two sampling stations, creek water and sediment cores were collected during the dry and wet seasons at all tidal phases (ebb, low, flow, and high tides). Physical-chemical parameters were measured in the creek water (temperature, salinity, pH, Eh, and DO), whereas pH, redox potential (Eh), and total organic matter contents were obtained from the sediment cores. In addition, total dissolved sulfide content ∑ (H2S, HS−, H2−) was measured from sediment pore water. During the dry and wet seasons, the creek water pH, Eh, and dissolved oxygen were lowest in low tide, whereas oxygenated conditions and higher pH and Eh values prevailed in high tide. The total organic matter content in sediments was higher during the dry season, with the highe...

The Peruvian upwelling system (PUS) is the most productive Eastern Boundary Upwelling System (EBUS) of the world ocean. Contrarily to higher latitude EBUSs, there is no consensus yet on the response of upwelling-favorable winds to regional climate change in this region. Global climate models are not able to reproduce the nearshore surface winds, and only a few downscaling studies have been performed by using relatively coarse-grid atmospheric models forced by idealized climate change scenarios. In the present study, the impact of climate change on the PUS upwelling-favorable winds was assessed using a high resolution regional atmospheric model to dynamically downscale the multi-model mean projection of an ensemble of 31 CMIP5 global models under the RCP8.5 worst-case climate scenario. We performed a 10-year retrospective simulation (1994–2003) forced by NCEP2 reanalysis data and a 10-y...

En: Report of the Tropical Pacific Observing System 2020 Workshop (TPOS 2020), Volume II – White Papers, n. 8a, San Diego, United States, January 27-30, 2014, Scripps Institution of Oceanography, p. 171-205. OOPS (Ocean Observations Panel for Climate)

RS is grateful to the Alexander von Humboldt foundation for granting a postdoctoral fellowship. We acknowledge the Institute del Mar del Peru (IMARPE) and the joint IMARPE-IRD projects PALEOTRACES and DISCOH for the support of this research. We also acknowledge the program CIENCIACTIVA that granted the research of climate change impacts on the upwelling ecosystem in the frame of the Master's Program in Marine Sciences at the Universidad Peruana Cayetano Heredia. This study was supported by the German Research Foundation through Sonderforschungsbereich 754 ("ClimateBiogeochemistry Interactions in the Tropical Ocean"). SEM observations were performed at the ALYSES facility (IRD, Sorbonne University, supported by grants from Region Ile-de-France). We deeply thank Bo Thamdrup, chief scientist of the Galathea-3 expedition (Leg 14), and Bente Lomstein, who conducted the core sampling onboard t...

Subsurface water masses with permanent oxygen deficiency (oxygen minimum zones,OMZ) are typically associated with upwelling regions and exhibit a high sensitivity to climate variability. Over the last decade, several studies have reported a global ocean deoxygenation trend since 1960 and a consequent OMZ expansion.

AP is supported by the “ Fondo Nacional de Desarrollo Científico, Tecnológico y de Innovación Tecnológica ” (Fondecyt - Peru), through the MAGNET research program. The collection of sampling was carried out within the framework of the “Impacto de la Variabilidad y Cambio Climático en el Ecosistema de Manglares de Tumbes” project. Supported by the International Development Research Centre of Canada under management of the Instituto Geofísico del Perú (IGP). WM is supported by research grants from the Brazilian Research Council (CNPq) . CJS is supported by the Australian Research Council ( DE160100443 , DP150103286 and LE140100083 ), in cooperation with Universidade Federal Fluminense . Project CTQ2011-28079-CO3-02 which is also supported with ERDF . We would like to thank Kelly Ronchi for the language revision.

The research was granted by the ‘Cátedra CONCYTEC en Ciencias del Mar’, sponsored by the Peruvian National Council of Science and Technology and the Universidad Peruana Cayetano Heredia, Master Program of Marine Sciences, and by the Peruvian Marine Research Institute (IMARPE) project INIOX. It was also supported by collaborative projects between the Institut de la Recherche pour le Développement (IRD) and IMARPE: LMI DISCOH and Chaire Croisée PROSUR.

4 varieties of Andean products are studied , considering the major producing regions and months of increased production, selected two varieties of maca , 3 quiwicha , one and one cailihua mashua . The applied chemical analyzes were based on standard methods of the AOC . Quantitative analyzes show the presence of mineral macronutrients ( Ca , P , K, Mg) , micronutrients essential biochemical processes (Mn , Zn , Fe) and primary metabolites (proteins ) . While in the qualitative analysis of important secondary metabolites such as amino acids , tannins and flavonoids appear .

4 varieties of Andean products are studied , considering the major producing regions and months of increased production, selected two varieties of maca , 3 quiwicha , one and one cailihua mashua . The applied chemical analyzes were based on standard methods of the AOC . Quantitative analyzes show the presence of mineral macronutrients ( Ca , P , K, Mg) , micronutrients essential biochemical processes (Mn , Zn , Fe) and primary metabolites (proteins ) . While in the qualitative analysis of important secondary metabolites such as amino acids , tannins and flavonoids appear .

This is the first study to assess the risk of co-endemic Plasmodium vivax and Plasmodium falciparum transmission in the Peruvian Amazon using boosted regression tree (BRT) models based on social and environmental predictors derived from satellite imagery and data. Yearly cross-validated BRT models were created to discriminate high-risk (annual parasite index API > 10 cases/1000 people) and very-high-risk for malaria (API > 50 cases/1000 people) in 2766 georeferenced villages of Loreto department, between 2010–2017 as other parts in the article (graphs, tables, and texts). Predictors were cumulative annual rainfall, forest coverage, annual forest loss, annual mean land surface temperature, normalized difference vegetation index (NDVI), normalized difference water index (NDWI), shortest distance to rivers, time to populated villages, and population density. BRT models built with predicto...

The original concept of El Niño consisted of anomalously high sea surface temperature and heavy rainfall along the arid northern coast of Peru (Carranza 1891; Carrillo 1893). The concept evolved into the El Niño–Southern Oscillation (ENSO; Bjerknes 1969), although the original El Niño and the Southern Oscillation do not necessarily have the same variability (Deser and Wallace 1987), and the strong El Niño episode in early 1925 coincided with cold-to-neutral ENSO conditions (Takahashi and Martínez 2017). To distinguish the near-coastal El Niño from the warm ENSO phase, Peru operationally defines the “coastal El Niño” based on the seasonal Niño 1+2 SST anomaly (ENFEN 2012; L’Heureux et al. 2017). While recent attention has been brought to the concept of ENSO diversity (e.g., “central Pacific” vs “eastern Pacific” events; Capotondi et al. 2015), the coastal El Niño ...

The highly productive waters of the Humboldt Current System (HCS) host a particular temperate ecosystem within the tropics, whose history is still largely unknown. The Pisco Formation, deposited during Mio-Pliocene times in the Peruvian continental margin has yielded an outstanding collection of coastal-marine fossils, providing an opportunity to understand the genesis of the HCS ecosystem. We present a comprehensive review, completed with new results, that integrates geological and paleontological data from the last 10 My, especially focusing on the southern East Pisco Basin (Sacaco area). We discuss the depositional settings of the Pisco Formation and integrate new U/Pb radiometric ages into the chronostratigraphic framework of the Sacaco sub-basin. The last preserved Pisco sediments at Sacaco were deposited ~ 4.5 Ma, while the overlying Caracoles Formation accumulated from ~ 2.7 Ma on...