Ernesto Pasten-Zapata

• PhD
• Scientific Researcher at Geological Survey of Finland

Non-perennial rivers and streams are ubiquitous. Nonetheless, our understanding of their hydrological patterns is minimal. Hydrological models are powerful tools to study and characterise hydrological patterns, but few can simulate extremes such as non-flow events. We aimed to capture and accurately simulate the flow intermittency spatial and tempo...

In AQUACLEW (Advancing the QUAlity of CLimate services for European Water), a project funded by JPI Climate and the ERA-NET Consortium ‘European Research Area for Climate Services (ERA4CS), we examined different ways of improving the usability of existing Climate Services across Europe tackling key aspects in Climate Services improvement: user enga...

Various methods are available for assessing uncertainties in climate impact studies. Among such methods, model weighting by expert elicitation is a practical way to provide a weighted ensemble of models for specific real-world impacts. The aim is to decrease the influence of improbable models in the results and easing the decision-making process. I...

The uncertainty of climate model projections is recognized as being large. This represents a challenge for decision makers as the simulation spread of a climate model ensemble can be large, and there might even be disagreement on the direction of the climate change signal among the members of the ensemble. This study quantifies changes in the hydro...

Study region This study is developed in three catchments located in Denmark, France and Spain, covering different climate and physical conditions in Europe. Study focus The simulation skill of hydrological models under contrasting climate conditions is evaluated using a Differential Split Sample Test (DSST). In each catchment, three different hydr...

Various methods are available for assessing uncertainties in climate impact studies. Among such methods, model weighting by expert elicitation is a practical way to provide a weighted ensemble of models for specific real-world impacts. The aim is to decrease the influence of improbable models in the results and easing the decision-making process. I...

Non-perennial rivers and streams are ubiquitous globally, especially in semi-arid and arid landscapes. Nonetheless, despite their prevalence worldwide, non-perennial systems have been under-represented in the hydrology research, and our understanding of their hydrology is minimal compared to perennial systems. Predicting the availability of freshwa...

Study region Two large-scale catchments in Denmark: Ringkøbing fiord and Mid-Zealand catchments. Study focus Future changes in hydrological regime, extremes, groundwater levels and ecological quality ratio (EQR) for fish were assessed. Based on an ensemble of 17 bias-corrected regional climate models forced by the emission scenario RCP8.5, a dry,...

Udvikling af landsdækkende modelberegninger af terrænnære hydrologiske forhold i 100m grid ved anvendelse af DK-modellen: Dokumentationsrapport vedr. modelleverancer til Hydrologisk Informations- og Prognosesystem. Udarbejdet som en del af DEN FÆLLESOFFENTLIGE DIGITALISERINGSSTRATEGI 2016-2020 INITIATIVET FÆLLES DATA OM TERRÆN, KLIMA OG VAND. Rapp...

Udvikling af landsdækkende modelberegninger af terrænnære hydrologiske forhold i 100m grid ved anvendelse af DK-modellen: Sammenfatningsrapport vedr. modelleverancer til Hydrologisk Informations- og Prognosesystem. Udarbejdet som en del af DEN FÆLLESOFFENTLIGE DIGITALISERINGSSTRATEGI 2016-2020 INITIATIVET FÆLLES DATA OM TERRÆN, KLIMA OG VAND

Regional Climate Models (RCMs) are an essential tool for analysing regional climate change impacts, such as hydrological change, as they provide simulations with more small-scale details and expected smaller errors than global climate models. There has been much effort to increase the spatial resolution and simulation skill of RCMs (i.e. through bi...

Regional Climate Models (RCMs) are an essential tool for analysing regional climate change impacts as they provide simulations with more small-scale details and expected smaller errors than global climate models. There has been much effort to increase the spatial resolution and simulation skill of RCMs, yet the extent to which this improves the pro...

Global Climate Models (GCMs) are the main tools used to assess the impacts of climate change. Due to their coarse resolution, with cells of c. 100 km × 100 km, GCMs are dynamically downscaled using Regional Climate Models (RCMs) that better incorporate the local physical features and simulate the climate of a smaller region, e.g. a country. However...

Globally, climate change is projected to affect the hydrological cycle. Nevertheless, the projected changes vary per region. Global Climate Models (GCMs) are the main tool used to project the changes in the future climate. Nevertheless, their spatial scale is large compared to the scale required for the assessment of local impacts. Therefore, Regio...

Zona Citrícola is an important area for Mexico due to its citriculture activity. Situated in a sub-humid to humid climate adjacent to the Sierra Madre Oriental, this valley hosts an aquifer system that represents sequences of shales, marls, conglomerates, and alluvial deposits. Groundwater flows from mountainous recharge areas to the basin-fill dep...

Nitrate isotopic values are often used as a tool to understand sources of contamination in order to effectively manage groundwater quality. However, recent literature describes that biogeochemical reactions may modify these values. Therefore, data interpretation is difficult and often vague. We provide a discussion on this topic and complement the...

We used environmental tracers (CFCs, 18O, 2H, 3H, 14C, and water chemistry) to analyze the groundwater quality and flow system underlying and supplying part of the Metropolitan Area of Guadalajara, México. Most of the samples showed isotopic signatures, indicating recharge from local meteoric precipitation. Significant tritium concentrations were i...

We used environmental tracers (CFCs, 18O, 2H, 3H, 14C, and water chemistry) to analyze the groundwater quality and flow system underlying and supplying part of the Metropolitan Area of Guadalajara, México. Most of the samples showed isotopic signatures, indicating recharge from local meteoric precipitation. Significant tritium concentrations were i...

El agua, como en todo el mundo, juega un papel primordial en la subsistencia y desarrollo de los países latinoamericanos y caribeños. Es importante conocer el estado actual que guarda este recurso en la región como la condición de los cuerpos de agua, la infraestructura hidráulica, la demanda, disponibilidad, gestión, etc. Esta información es primo...