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A través del Repositorio Geofísico Nacional (REGEN), el IGP organiza su producción científica en comunidades que reúnen todo el conocimiento científico obtenido a lo largo de más de 100 años de investigación

Ciencias de la Tierra Sólida

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Impacto de la Geofísica en el Desarrollo Sostenible

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Instrumentación Geofísica y Desarrollo Tecnológico

Ciencias de la Atmósfera, Hidrosfera y Cambio Climático

Ciencias de la Tierra Sólida

Ciencias del Geoespacio

Formación profesional

Impacto de la Geofísica en el Desarrollo Sostenible

Institucional

Instrumentación Geofísica y Desarrollo Tecnológico

Ciencias de la Atmósfera, Hidrosfera y Cambio Climático

Ciencias de la Tierra Sólida

Ciencias del Geoespacio

Formación profesional

Impacto de la Geofísica en el Desarrollo Sostenible

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Enlaces de Referencias

Ítem

Acceso Abierto

Knowing with the river: Situated risks of riverine communities in the Peruvian Amazon

(Springer, 2026-05-26) Mendoza, Heidi D.; Valenzuela, Jonathan; Armijos Cardenas, Elisa Natalia; Van Loon, Anne F.; Rohse, Melanie; Koehler, Johanna K. L.; Mariano, Bryan Joel; Gonzalo, Bruno T. C.; Diaz, Paulo F. S.; Vasquez, Cesar P. A.; Souza, Carlos J. A.; Izaguirre, Elsa A. V.; Bazo, Juan; Anicama, Jahir

Dominant approaches to drought and flood risk often marginalize the social and temporal dimensions of how communities experience environmental change. This study explores how three riverine communities in the Peruvian Amazon—Bajo Belén, Tamshiyacu, and El Chino—generate and act on knowledge of river dynamics to sustain livelihoods amid increasing hydrological variability. Using storytelling with 45 participants (2023–2024), and co-produced seasonal calendars, we identified risk windows or periods of heightened vulnerability when river levels misalign with local expectations. These windows provide a situated lens into how risks are interpreted and navigated through embodied, relational, and adaptive strategies. Our findings highlight the centrality of place-based knowledge and temporal attunement to sustainable adaptation, challenging technocratic risk frameworks. By reframing hydrological extremes as relational and embedded in local rhythms, the study calls for more inclusive governance that reflects the socio-cultural and ecological specificities of hydrological risks.

Palabras clave:Amazon basin Hydrological extremes Risk Windows

Ítem

Acceso Abierto

Impacts of the future Amazon deforestation on the precipitation over the Peruvian central Andes and related atmospheric features

(Elsevier, 2026-05-13) Saavedra Huanca, Miguel; Junquas, Clementine; Takahashi, Ken; Silva Vidal, Yamina; Espinoza, Jhan-Carlo; Sierra, Juan-Pablo

This study investigates the impact of a 40% Amazon deforestation scenario (projected for 2050) on precipitation over the central Peruvian Andes during five austral summer seasons (DJF 2001–2006) using high-resolution (1 km) WRF simulations. While a widespread rainfall reduction pattern is observed over the Amazon-Andes transition zone, statistically significant decreases (p < 0.10) at the gridpoint level are primarily concentrated near rainfall hotspots in the Amazon-Andes transitions zone, reaching an average reduction of 12% (− 1.4 mm day− 1 ). This drying signal is physically associated with a weakening of the South American Low-Level Jet (LLJ) and reduced moisture influx, which specifically inhibits convective activity during the morning peak hours (23–11 LT). In the high-altitude Mantaro Basin, we observe a consistent drying pattern (− 5%) that extends from the transition zone; although these changes are not statistically significant due to high interannual variability, the physical signal of precipitation reduction and dry air advection remains clear. Conversely, the western Andean ridges exhibit a localized precipitation increase (up to 20%) linked to intensified cross-barrier easterly wind anomalies reinforcing diurnal anabatic circulation. We further find that while 5 km resolution captures broad basin-scale patterns, convection-permitting scales (1 km) are essential for resolving these complex topographic effects. These findings highlight a critical vulnerability concentrated along the eastern slopes and the high Andes. The identified drying patterns, which are particularly pronounced in the Andes-Amazon transition zone (a global biodiversity hotspot) and extend into the highlands, pose a significant threat to endemic ecosystems and regional water security, specifically through reservoir inflow reduction and negative impacts on agriculture.

Palabras clave:Amazon deforestation Andes precipitation WRF model

Ítem

Acceso Abierto

Boletín sísmico mensual (mayo 2026)

(Instituto Geofísico del Perú, 2026-05) Instituto Geofísico del Perú

Durante el mes de mayo de 2026, el Centro Sismológico Nacional (CENSIS) reportó la ocurrencia de 83 sismos con epicentros en el borde occidental y dentro del territorio peruano.

Palabras clave:Sismos Sismicidad Sismología

Ítem

Acceso Abierto

Informe Técnico Nº PpR/El Niño-IGP/2026-04

(Instituto Geofísico del Perú, 2026-05-18) Instituto Geofísico del Perú

Las temperaturas del mar frente a la costa peruana continúan con valores por encima de su normal. Tanto el análisis de la información in situ como la remota, incluyendo los resultados de los modelos de propagación de ondas, indica que el paquete de ondas de Kelvin cálidas continuaría afectando la costa peruana, por lo pronto, hasta junio, con un impacto principalmente en las temperaturas subsuperficiales. A una escala mayor, los modelos de NMME sugieren la extensión de El Niño costero hasta el verano 2027 con una magnitud fuerte. Por otro, los pronósticos de estos mismos modelos indican el desarrollo de un evento El Niño en el Pacífico central desde junio. No obstante, la presencia de la barrera de predictibilidad podría limitar la confiabilidad de estos pronósticos más allá de mayo. Se espera que los futuros pronósticos mejoren su capacidad predictiva.

Palabras clave:El Niño Fenómeno El Niño Temperatura del océano

Ítem

Restringido

Peatland responses to climate change in the Central Peruvian Andes

(Elsevier, 2026-04-06) Huaman-Navarro, Yizet E.; Turcq, Bruno; Moreira-Turcq, Patricia; Apaéstegui Campos, James Emiliano ; Garcia, Jorge Luis; Billy, Isabelle; Llanos, Romina; Willems, Bram

The high central Andes have undergone significant hydroclimatic changes in recent decades, affecting ecosystems through glacier retreat, temperature variations, and shifts in precipitation type (e.g., rain, snow, and hail). Andean peatlands play a crucial role in water regulation and biogeochemical cycles and are highly sensitive to climate change. Here we reconstruct Late Holocene changes in organic matter (OM) accumulation and preservation over the last ~2500 years in a peatland of the south-central Peruvian Andes (4210 m a.s.l.) using the 96- cm APA01 core. We integrate bulk organic geochemistry with continuous X-ray fluorescence (XRF) core scanning, centered log-ratio (clr) transformation, principal component analysis (PCA), and accumulation-rate estimates. A key finding is the close temporal coherence between peat PC1-clr (a proxy for OM dynamics) and the decadal snow accumulation record from Quelccaya Ice Cap, indicating that peat carbon dynamics closely track the regional high-elevation moisture balance. Dry phases such as the Medieval Climate Anomaly (MCA) coincide with reduced OM accumulation, whereas cooler and wetter conditions during the Little Ice Age (LIA) favor enhanced OM preservation. Warming phases, such as the MCA, after LIA, and recent decades, showed high clastic mineral input possibly linked to an increased proportion of rain-to-snow precipitation and land use. These results highlight the sensitivity of Andean peatlands to hydroclimatic variability and underscore the vulnerability of their carbon storage and hydrological functions under ongoing climate change.

Palabras clave:Andean peatland Organic matter Late Holocene