Now showing items 1-20 of 20

    • The 2017 coastal El Niño 

      Takahashi, Ken; Aliaga Nestares, Vannia; Avalos, Grinia; Bouchon, M.; Castro, Anabel; Cruzado, L.; Dewitte, B.; Gutiérrez, B.; Lavado-Casimiro, W.; Marengo, J.; Mosquera-Vásquez, K.; Quispe, Nelson

      (American Meteorological Society, 2018-08)
      Acceso abierto
      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 ...
    • 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 ...
    • Change in strong Eastern Pacific El Niño events dynamics in the warming climate 

      Carréric, Aude; Dewitte, Boris; Cai, Wenju; Capotondi, Antonietta; Takahashi, Ken; Yeh, Sang-Wook; Wang, Guojian; Guémas, Virginie

      (Springer, 2020)
      Acceso restringido
      While there is evidence that ENSO activity will increase in association with the increased vertical stratification due to global warming, the underlying mechanisms remain unclear. Here we investigate this issue using the ...
    • Climate impacts of the El Niño–Southern Oscillation on South America 

      Cai, Wenju; McPhaden, Michael J.; Grimm, Alice M.; Rodrigues, Regina R.; Taschetto, Andréa S; Garreaud, René D.; Dewitte, Boris; Poveda, Germán; Ham, Yoo-Geun; Santoso, A.; Ng, Benjamin; Anderson, Weston; Wang, Guojian; Geng, Tao; Jo, Hyun-Su; Marengo, José A.; Alves, Lincoln M.; Osman, Marisol; Li, Shujun; Wu, L.; Karamperidou, Christina; Takahashi, Ken; Vera, Carolina

      (Nature Publishing Group, 2020-04-10)
      Acceso abierto
      The climate of South America (SA) has long held an intimate connection with El Niño, historically describing anomalously warm sea-surface temperatures off the coastline of Peru. Indeed, throughout SA, precipitation and ...
    • Climatology of extreme cold events in the central Peruvian Andes during austral summer: origin, types and teleconnections 

      Sulca, Juan; Vuille, Mathias; Roundy, Paul; Takahashi, Ken; Espinoza, J.C.; Silva, Yamina; Trasmonte, Grace; Zubieta, R.

      (Royal Meteorological Society, 2018-08-30)
      Acceso abierto
      The climatological and large‐scale characteristics of the extreme cold events (ECEs) in the central Peruvian Andes (Mantaro basin (MB)) during austral summer (January–March) are examined using reanalysis, gridded and in ...
    • Control of seasonal and inter-annual rainfall distribution on the Strontium-Neodymium isotopic compositions of suspended particulate matter and implications for tracing ENSO events in the Pacific coast (Tumbes basin, Peru) 

      Moquet, Jean -Sébastien; Morera, Sergio; Turcq, Bruno; Poitrasson, Franck; Roddaz, Martin; Moreira- Turcq, Patricia; Carlo Espinoza, Jhan; Guyot, Jean-Loup; Takahashi, Ken; Orrillo-Vigo, Jhon; Petrick, Susana; Mounic, Stéphanie; Sondag, Francis

      (Institut de recherche pour le développement-IRD, 2020-01)
      Embargado
      The geochemistry of riverine sediments exported to the oceans is important for paleo-hydro-climatic reconstruction. However, climate reconstruction requires a good understanding of the relationship between geochemistry and ...
    • Editorial : Tropical Climate Variability and Change: Impacts in the Amazon 

      Jimenez, J. C.; Takahashi, Ken

      (Frontiers in Earth Science, 2019-08-26)
      Vast amounts of data from satellites and ground-based systems, and improvements on modeling techniques, allows a better understanding of Earth processes and advances on climate science. The tropics play a key role on global ...
    • 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 ...
    • Extreme El Niño Events 

      Dewitte, B.; Takahashi, Ken

      (Elsevier, 2019)
      Acceso cerrado
      Every few years the tropical Pacific warms abnormally in association with a relaxation of the trade winds, a phenomenon known as the El Niño–Southern Oscillation (ENSO) that represents the strongest fluctuation of the ...
    • Impacts of different ENSO flavors and tropical Pacific convection variability (ITCZ, SPCZ) on austral summer rainfall in South America, with a focus on Peru 

      Sulca, Juan; Takahashi, Ken; Espinoza, J.C.; Vuille, M.; Lavado-Casimiro, W.

      (John Wiley and Sons Ltd, 2018-01)
      Acceso abierto
      El Niño in the eastern and central Pacific has different impacts on the rainfall of South America, and the atmospheric pathways through the South Pacific Convergence Zone (SPCZ) and Inter-Tropical Convergence Zone (ITCZ) ...
    • Increased variability of eastern Pacific El Niño under greenhouse warming 

      Cai, Wenju; Wang, G.; Dewitte, B.; Wu, L.; Santoso, A.; Takahashi, Ken; Yang, Y.; Carréric, A.; McPhaden, M.J

      (Nature Publishing Group, 2018-12)
      Acceso cerrado
      The El Niño–Southern Oscillation (ENSO) is the dominant and most consequential climate variation on Earth, and is characterized by warming of equatorial Pacific sea surface temperatures (SSTs) during the El Niño phase and ...
    • Lineamientos para el diseño de sistemas integrados de vigilancia y pronóstico hidrometeorológico con fines de alerta temprana. Nota Técnica 

      Metzger, Luis; Asencios Astorayme, Henry Joel; Chira, Jorge; Huamán, Joao; Lau, Julio; León, Karen; Millán, Carlos; Valderrama, Benito; Rivera, Freddy; Briones, Jorge; Gonzales, Dany; López, Juan José; Obregón, Juan; Ordóñez, Luis; Rodríguez, Jose Luis; Delia, Acuña; Lavado-Casimiro, W.; Oria, Clara; Quispe, Nelson; Yerrén, Jorge; Asenjo, Erick; Chacón, José; Huamán, Sonia; Arboleda Orozco, Juan Fernando; Felipe-Obando, Oscar; Rosas, Gabriela; Gonzales, Marina; Barrón, Percy; Ferro, Vladimir; Ochoa, José; Takahashi, Ken

      (Servicio Nacional de Meteorología e Hidrología del PerúPE, 2021-04)
      Acceso abierto
      La Nota Técnica presenta los lineamientos para el diseño del sistema integrado de sistemas de vigilancia y pronóstico hidrometeorológico con fines de alerta temprana, principalmente ante inundaciones, y movimientos en masa ...
    • Mechanisms of tropical precipitation biases in climate models 

      Kim, Hanjun; Kang, Sarah M.; Takahashi, Ken; Donohoe, Aaron; Pendergrass, Angeline G.

      (Springer, 2020-10-27)
      Embargado
      We investigate the possible causes for inter-model spread in tropical zonal-mean precipitation pattern, which is divided into hemispherically symmetric and anti-symmetric modes via empirical orthogonal function analysis. ...
    • Ocean climate observing requirements in support of climate research and climate information 

      Stammer, D; Bracco, A.; AchutaRao, K.; Beal, Lisa; Bindoff, Nathaniel L.; Braconnot, Pascale; Cai, Wenju; Chen, Dake; Collins, Matthew; Danabasoglu, Gokhan; Dewitte, Boris; Farneti, Riccardo; Fox-Kemper, Baylor; Fyfe, John; Griffies, Stephen; Jayne, Steven R.; Lazar, Alban; Lengaigne, Matthieu; Lin, Xiaopei; Marsland, Simon; Shoshiro, Minobe; Monteiro, Pedro M. S.; Robinson, Walter; Roxy, Mathew Koll; Rykaczewski, Ryan R.; Speich, Sabrina; Smith, Inga J.; Solomon, Amy; Storto, Andrea; Takahashi, Ken; Toniazzo, Thomas; Vialard, Jerome

      (Frontiers in Earth Science, 2019-07-31)
      Natural variability and change of the Earth’s climate have significant global societal impacts. With its large heat and carbon capacity and relatively slow dynamics, the ocean plays an integral role in climate, and provides ...
    • 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 ...
    • The role of ENSO flavours and TNA on recent droughts over Amazon forests and the Northeast Brazil region 

      Jimenez, Juan C.; Marengo, Jose A.; Alves, Lincoln M.; Sulca, Juan; Takahashi, Ken; Ferrett, Samantha; Collins, Matthew

      (Royal Meteorological Society, 2019-12-27)
      Acceso restringido
      Amazon tropical forests and the semiarid Northeast Brazil (NEB) region have registered very severe droughts during the last two decades, with a frequency that may have exceeded natural climate variability. Severe droughts ...
    • SILVIA: An operational system to monitoring landslides forced by heavy precipitations at national scale in Peru 

      Millan, Carlos; Lavado-Casimiro, W.; Vega, Fiorella; Felipe-Obando, Oscar; Acuña, Julia; Takahashi, Ken

      (European Geosciences Union, 2020)
      Acceso abierto
      In Peru, heavy precipitations (PR) are the second natural phenomenon with the greatest number of people affected in recent decades. Landslides (known as “huaycos” in Peru) are mostly produced by PR and located overall on ...
    • Spatio-temporal patterns of thermal anomalies and drought over tropical forests driven by recent extreme climatic anomalies 

      Jimenez, Juan C.; Barichivich, Jonathan; Mattar, Cristian; Takahashi, Ken; Santamaría-Artigas, Andrés; Sobrino, José A.; Malhi, Yadvinder

      (The Royal Society, 2018-08-23)
      The recent 2015– 2016 El Niño (EN) event was considered as strong as the EN in 1997–1998. Given such magnitude, it was expected to result in extreme warming and moisture anomalies in tropical areas. Here we characterize ...
    • Strength outlooks for the El Niño-Southern Oscillation 

      L'Heureux, M.L.; Tippett, M.K.; Takahashi, Ken; Barnston, A.G.; Becker, E.J.; Bell, G.D.; Di Liberto, T.E.; Gottschalck, J.; Halpert, Michael S.; Hu, Zeng-Zhen; Johnson, Nathaniel C.; Xue, Yan; Wang, Wanqiu

      (American Meteorological Society, 2019-02)
      Acceso abierto
      Three strategies for creating probabilistic forecast outlooks for El Niño-Southern Oscillation (ENSO) are compared. One is subjective and is currently used by the NOAA/Climate Prediction Center (CPC) to produce official ...
    • Tropical Pacific observing system 

      Smith, N.; Kessler, W.S.; Cravatte, S.; Sprintall, J.; Wijffels, S.; Cronin, M.F.; Sutton, A.; Serra, Y.L.; Dewitte, B.; Strutton, P.G.; Hill, K.; Gupta, A.S.; Lin, X.; Takahashi, Ken; Chen, D.; Brunner, Shelby

      (Frontiers in Earth Science, 2019-02-18)
      This paper reviews the design of the Tropical Pacific Observing System (TPOS) and its governance and takes a forward look at prospective change. The initial findings of the TPOS 2020 Project embrace new strategic approaches ...