Now showing items 1-20 of 124

    • Evolution of the tropical response to periodic extratropical thermal forcing 

      Shin, Y.; Kang, S.M.; Takahashi, Ken; Stuecker, M.F.; Hwang, Y.-T.; Kim, D.

      (American Meteorological SocietyPE, 2021-08)
      Embargado
      This study examines the temporal evolution of the extratropically forced tropical response in an idealized aquaplanet model under equinox condition. We apply a surface thermal forcing in the northern extratropics that ...
    • Central South America 

      Marengo, J. A.; Espinoza, J. C.; Alves, L. M.; Ronchail, J.; Lavado-Casimiro, W.; Ramos, A. M.; Molina-Carpio, J.; Correa, Kris; Baez, J.; Salinas, R.

      (American Meteorological Society, 2020-08)
      Acceso abierto
      Heavy rainfall events were observed in January along the dry southern coast of Peru, resulting in some locations breaking precipitation records of more than 30 years. Heavy rainfall during February led to 42 landslides ...
    • Climatic control on eastern Andean denudation rates (Central Cordillera from Ecuador to Bolivia) 

      Pepin, E.; Guyot, J.L.; Armijos, E.; Bazan, H.; Fraizy, P.; Moquet, J.S.; Noriega, L.; Lavado-Casimiro, W.; Pombosa, R.; Vauchel, P.

      (Elsevier, 2013-07)
      Acceso cerrado
      The suspended sediment yield and associated current denudation rates of eight large catchments located along the eastern range of the central Andes have been determined. The catchments have been chosen as mountainous and ...
    • Cl and Na Fluxes in an Andean Foreland Basin of the Peruvian Amazon: An Anthropogenic Impact Evidence 

      Moquet, Jean-Sébastien; Maurice, Laurence; Crave, Alain; Viers, Jérôme; Arevalo, Nore; Lagane, Christelle; Lavado-Casimiro, W.; Guyot, Jean-Loup

      (Springer, 2014-09-14)
      Acceso abierto
      The dissolved load of the Amazon River is generally considered to be lowlyimpacted by anthropogenic activities. In this work, based on the chemical and hydrologicaldatabase of the Environmental Research Observatory—HYBAM ...
    • Rainfall hotspots over the southern tropical Andes: Spatial distribution, rainfall intensity, and relations with large-scale atmospheric circulation 

      Espinoza, Jhan Carlo; Chavez, Steven; Ronchail, Josyane; Junquas, Clémentine; Takahashi, Ken; Lavado-Casimiro, W.

      (American Geophysical Union, 2015-05-11)
      Acceso abierto
      The Andes/Amazon transition is among the rainiest regions of the world and the interactionsbetween large-scale circulation and the topography that determine its complex rainfall distribution remainpoorly known. This work ...
    • Low-frequency modulation and trend of the relationship between ENSO and precipitation along the northern to centre Peruvian Pacific coast 

      Bourrel, Luc; Rau, Pedro; Dewitte, Boris; Labat, David; Lavado-Casimiro, W.; Coutaud, Aude; Vera, Andrea; Alvarado, Abigail; Ordoñez, Julio

      (John Wiley and Sons, 2014-05-21)
      Acceso abierto
      The relationship between El Niño Southern Oscillation (ENSO) and precipitation along the Peruvian Pacific coast is investigated over 1964–2011 on the basis of a variety of indices accounting for the different types of El ...
    • Measurements of sulfur dioxide,ozone and ammonia concentrations in Asia,Africa,and South America using passive samplers 

      Carmichae, Gregory R.; Ferm, Martin; Thongboonchoo, Narisara; Woo, Jung-Hun; Chanc, L.Y.; Muranod, Kentaro; Viet, Pham Hung; Mossberg, ,Carl; Bala, Rajasekhlar; Boonjawat, Jariya; Upatum, Pramote; Mohan, Manju; Adhikary, Sharad P.; Shrestha, ,Arun B.; Pienaar, J.J.; Brunke, Ernst B.; Chen, ,Tai; Jiep, Tang; Guoan, Ding; Leong Chow, Peng; Dhiharto, Sri; Harjanto, Hery; Jose, Aida M.; Wilson, Kimani; Kirouane, Abdelmalek; Lacaux, Jean-Pierre; Richard, Sandrine; Barturen, Osvaldo; Carrasco Cerda, Jorge; Athayde, Augusto; Tavares, Tania; Silva Cotrina, Jose; Bilici, Erdal

      (Elsevier, 2003)
      Acceso abierto
      Measurements of gaseous SO2,NH3,and O3 using IVL passive sampler technology were obtained during a pilot measurement program initiated as a key component of the newly established WMO/GAW Urban Research Meteorology and ...
    • Atmospheric transmissivity: distribution and empirical estimation around the central Andes 

      Baigorria, Guillermo A.; Villegas, Esequiel B.; Trebejo, Irene; Carlos, Jose F.; Quiroz, Roberto

      (John Wiley & SonsPE, 2004)
      Acceso abierto
      This study of the distribution in space and time of atmospheric transmissivity τ takes into account the fact that, in complex terrain, many factors affect this variable; thus, it is not possible to use the generalizations ...
    • PISCO_HyM_GR2M: A Model of Monthly Water Balance in Peru (1981–2020) 

      Llauca, Harold; Lavado-Casimiro, W.; Montesinos, Cristian; Santini, William; Rau, Pedro

      (MDPI AG, 2021-04-10)
      Acceso abierto
      Quantification of the surface water offer is crucial for its management. In Peru, the low spatial density of hydrometric stations makes this task challenging. This work aims to evaluate the hydrological performance of a ...
    • Cutoff low over the southeastern Pacific Ocean: a case study 

      Quispe, Nelson; Aliaga Nestares, Vannia; Rodríguez Zimmermann, Diego; Bonshoms, Martí; Loayza, Raquel; García, Teresa; Mesia, José; Duran, Ricardo; Olivares, Sara

      (CSIRO, 2021-02-17)
      Acceso abierto
      Cutoff lows (COLs) are infrequent events in the tropics that can cause extreme rainfall, flash flooding and landslides in arid areas, such as western South America. In this study, the life cycle of a COL in the southeastern ...
    • From drought to flooding: understanding the abrupt 2010-11 hydrological annual cycle in the Amazonas River and tributaries 

      Espinoza, Jhan Carlo; Ronchail, Josyane; Guyot, Jean Loup; Junquas, Clementine; Guillaume, Drapeau; Martinez, Jean Michel; William, Santini; Philippe, Vauchel; Lavado-Casimiro, W.; Ordoñez, Julio; Espinoza, Raúl

      (Institute of Physics Publishing, 2012-01)
      Acceso abierto
      In this work we document and analyze the hydrological annual cycles characterized by a rapid transition between low and high flows in the Amazonas River (Peruvian Amazon) and we show how these events, which may impact ...
    • Suspended sediment dynamics in the Amazon River of Peru 

      Armijos, Elisa; Crave, Alain; Vauchel, Philippe; Fraizy, Pascal; Santini, William; Moquet, Jean-Sèbastien; Arevalo, Nore; Carranza, Jorge; Guyot, Jean-Loup

      (Elsevier, 2013-07)
      Acceso cerrado
      The erosion and transport of sediments allow us to understand many activities of significance, such as crust evolution, climate change, uplift rates, continental processes, the biogeochemical cycling of pollutants and ...
    • Two Contrasting Severe Seasonal Extremes in Tropical South America in 2012: Flood in Amazonia and Drought in Northeast Brazil 

      Marengo, José A.; Alves, Lincoln M.; Soares, W.R.; Rodriguez, D.A.; Camargo, H.; Riveros, M.P.; Pabló, A.D.

      (American Meteorological Society, 2013-11)
      Acceso abierto
      Two simultaneous extreme events affected tropical South America to the east of the Andes during the austral summer and fall of 2012: a severe drought in Northeast Brazil and intense rainfall and floods in Amazonia, both ...
    • Meteorological factors and childhood diarrhea in Peru, 2005–2015: a time series analysis of historic associations, with implications for climate change 

      Delahoy, Miranda J.; Cárcamo, César; Huerta, Adrian; Lavado-Casimiro, W.; Escajadillo Fernandez, Yury; Ordoñez, Luís; Vasquez, Vanessa; Lopman, Benjamin; Clasen, Thomas; Gonzales, Gustavo F.; Steenland, Kyle; Levy, Karen

      (BioMed Central Ltd, 2021-02-26)
      Acceso abierto
      Background: Global temperatures are projected to rise by ≥2 °C by the end of the century, with expected impacts on infectious disease incidence. Establishing the historic relationship between temperature and childhood ...
    • Assessing near real-time satellite precipitation products for flood simulations at sub-daily scales in a sparsely gauged watershed in Peruvian andes 

      Llauca, Harold; Lavado-Casimiro, W.; León, Karen; Jimenez, Juan; Traverso, Kevin; Rau, Pedro

      (MDPI AG, 2021-02-23)
      Acceso abierto
      This study investigates the applicability of Satellite Precipitation Products (SPPs) in near real-time for the simulation of sub-daily runoff in the Vilcanota River basin, located in the southeastern Andes of Peru. The ...
    • Updating regionalization of precipitation in Ecuador 

      Ilbay-Yupa, Mercy; Lavado-Casimiro, W.; Rau, Pedro; Zubieta, Ricardo; Castillón, Fiorela

      (Springer, 2021-01-07)
      Acceso abierto
      This article identifies homogeneous precipitation regions in Ecuador and their relationship to the El Niño-Southern Oscillation (ENSO), using monthly records from 215 rain stations for the 1968–2014 period. A k-means ...
    • Air pollution and COVID-19 lockdown in a large South American city: Santiago Metropolitan Area, Chile 

      Toro A., Richard; Catalán, Francisco; Urdanivia Lermo, Francesco Renato; Rojas Quincho, Jhojan Pool; Manzano, Carlos A.; Seguel, Rodrigo; Gallardo, Laura; Osses, Mauricio; Pantoja, Nicolás; Leiva-Guzman, Manuel A.

      (Elsevier B.V., 2021-02)
      Acceso abierto
      The implementation of confinement and physical distancing measures to restrict people's activities and transit in the midst of the COVID-19 pandemic allowed us to study how these measures affect the air quality in urban ...
    • Chemical characteristics and identification of PM10 sources in two districts of Lima, Peru 

      Ilizarbe-Gonzáles, Gina Mishel; Rojas-Quincho, Jhojan Pool; Cabello-Torres, Rita Jaqueline; Ugarte-Alvan, Carlos Alfred; Reynoso-Quispe, Patricia; Valdiviezo-Gonzales, Lorgio Gilberto

      (Universidad Nacional de Colombia, 2020-11)
      Acceso abierto
      This study evaluates the concentration of PM10 and PM2.5 andidentifies the sources of pollution in the districts of San Juan de Lurigancho (SJL) and Puente Piedra (PPD) located in the eastern and northern zones of the ...
    • Effects of COVID-19 pandemic control measures on air pollution in Lima metropolitan area, Peru in South America 

      Rojas Quincho, Jhojan Pool; Urdanivia Lermo, Francesco Renato; Garay Saravia, Roy Antonio; García Rosales, Alan Jesús; Enciso Ojeda, Carlos; Medina Dionicio, Elvis Anthony; Toro, Richard A.; Manzano, Carlos; Leiva-Guzmán, Manuel A.

      (Springer, 2021-02-04)
      Acceso abierto
      The sanitary measures implemented to control and prevent an increase in infections due to the COVID-19 pandemic have produced an improvement in the air quality of many urban areas around the world. We assessed air quality ...
    • A framework for research linking weather, climate and COVID-19 

      Zaitchik, Benjamin F.; Sweijd, Neville; Shumake-Guillemot, Joy; Morse, Andy; Gordon, Chris; Marty, Aileen; Trtanj, Juli; Luterbacher, Juerg; Botai, Joel; Behera, Swadhin; Lu, Yonglong; Olwoch, Jane; Takahashi, Ken; Stowell, Jennifer D.; Rodó, Xavier

      (Nature Research, 2020)
      Acceso abierto
      When COVID-19 began to spread, environmental scientists recognized that the world faced a dangerous upper respiratory viral disease that might exhibit sensitivity to seasonal weather conditions. Many of these scientists ...