Precipitation, Temperature and Evaporation

Castro, Lina; Gironás, Jorge

doi:10.1007/978-3-030-56901-3_3

Cited by 5 publications

(3 citation statements)

References 46 publications

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“…Within this context, Reboita et al [121] present an extensive and detailed description of the climate variability modes that most in-fluence precipitation and atmospheric circulation in several regions of SA. Notwithstanding, studies indicate that the SPSA intensification is associated with the weakening of the Pacific Decadal Oscillation (PDO) positive phase and the strengthening of the Southern Annular Mode (SAM) positive phase in recent decades [14,[121][122][123][124][125][126][127][128][129][130][131]. Furthermore, these factors are related to the reduced rainfall in Chile's central and southern sectors [124,[128][129][130].…”

Section: Regional Precipitation Clusters In South Americamentioning

confidence: 99%

A New Look into the South America Precipitation Regimes: Observation and Forecast

Ferreira

Reboita

2022

Atmosphere

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South America is a vast continent characterized by diverse atmospheric phenomena and climate regimes. In this context, seasonal climate predictions are helpful for decision-making in several relevant socioeconomic segments in this territory, such as agriculture and energy generation. Thus, the present work evaluates the performance of ECMWF-SEAS5 in simulating the South American precipitation regimes by applying a non-hierarchical clustering technique. In addition, the study describes the main atmospheric systems that cause precipitation in each cluster and updates a previous work performed in South America in 2010. As a result, ECMWF-SEAS5 simulates (with good correspondence) the eight climate regimes identified in the analysis of precipitation from the Climate Prediction Center (CPC). Moreover, ECMWF-SEAS5 has a satisfactory ability in representing the rainfall regime in low and medium climate predictability regions, such as central and southern South America. ECMWF-SEAS5 has good performance in the climate characterization of South America and it gives us confidence in using its seasonal climate predictions throughout the continent.

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Section: Regional Precipitation Clusters In South Americamentioning

confidence: 99%

A New Look into the South America Precipitation Regimes: Observation and Forecast

Ferreira

Reboita

2022

Atmosphere

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“…The climate regime in central and northern Chile, under the influence of the Southeast Pacific Subtropical Anticyclone, features very dry conditions to the north and a strong dry-to-wet gradient toward the south (Figure 2c), with a marked Mediterranean-like precipitation seasonality (80%-90% of annual precipitation accumulates between April and September in central Chile). Aridity dominates in the northern part of the domain (below 32°S), where annual evaporation amounts may exceed the precipitation in some places, suggesting the contribution of underground layers to satisfy the evaporative demand (Castro & Gironás, 2021). Further, the Andes Cordillera, with peak elevations above 6,500 m a.s.l.…”

Section: Study Domainmentioning

confidence: 99%

Hydrologic Sensitivities and ENSO Variability Across Hydrological Regimes in Central Chile (28°–41°S)

Hernandez

Mendoza

Boisier

et al. 2022

Water Resources Research

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The El Niño-Southern Oscillation (ENSO) is the main driver of interannual climate variability globally, manifesting as pseudo-oscillatory oceanic/atmospheric anomaly patterns in the tropical Pacific (e.g., Grothe et al., 2019;Timmermann et al., 2018), and affecting the climate of vast regions, notably across the Pacific Rim. In this region, ENSO exhibits a well-known average pattern of sea surface temperature (SST) and other variables, but also an important degree of heterogeneity across episodes. The phases of ENSO are not fully symmetrical: warm (El Niño) episodes may reach SST anomalies of larger amplitude than cold (La Niña) events, while La Niña episodes show greater temporal persistence than El Niño (Timmermann et al., 2018). Further, the spatial ENSO patterns may vary substantially, in particular regarding the location of warm SST anomalies during an El Niño episode (e.g.,

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“…They also present medium to low permeability that is associated with the predominant geological characteristics of the basins that compose the groups (volcanic, plutonic, and mixed). Finally, these basins present aridity indices below 1 (Figure 3e), corresponding to their geographic location (Andes Mountains), where precipitation is greater than evapotranspiration [32,40]. also present medium to low permeability that is associated with the predominant geological characteristics of the basins that compose the groups (volcanic, plutonic, and mixed).…”

Section: Basin-scale Spatial Distribution Of Characteristicsmentioning

confidence: 99%

Analysis of the Behavior of Groundwater Storage Systems at Different Time Scales in Basins of South Central Chile: A Study Based on Flow Recession Records

Parra

Muñoz

Arumí

et al. 2023

Water

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Understanding the groundwater storage and release (S-Q) process and its contribution to river flows is essential for different hydrological applications, especially in periods of water scarcity. The S-Q process can be characterized based on recession parameter b, which is the slope of the power–law relationship −dQ/dt = aQb of the recession flow analysis, where recession parameter b represents the linearity of the S-Q process. In various studies, it has been found that this parameter can present high variability, which has been associated with the approach or spatial variability of basin characteristics. However, the variability of parameter b and its relationship with geology and the behavior of groundwater storage over time (evolution over time) have not been sufficiently studied. The objective of this study is to analyze the variability of recession parameter b and its relationship with geological and morphological characteristics and climate variability at different time scales. To this end, 72 drainage basins located in south central Chile were examined via recession flow analysis, considering five different time scales (5 years, 10 years, 15 years, 20 years, and 25 years). In addition, to analyze spatial variability patterns and generate groups of basins with similar characteristics, a cluster analysis was carried out. Clusters were obtained using the principal component analysis (PCA) and K-means methods. The results show that in wet periods, the slope of recession parameter b tends to increase (fast drainage process), while in dry periods, the recession slope tends to decrease (slow drainage processes). In general, the results suggest that the variability of recession coefficient b indicates changes in S-Q behavior; therefore, it could be used as an indicator of the sensitivity of a basin to climate variability.

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Precipitation, Temperature and Evaporation

Cited by 5 publications

References 46 publications

A New Look into the South America Precipitation Regimes: Observation and Forecast

A New Look into the South America Precipitation Regimes: Observation and Forecast

Hydrologic Sensitivities and ENSO Variability Across Hydrological Regimes in Central Chile (28°–41°S)

Analysis of the Behavior of Groundwater Storage Systems at Different Time Scales in Basins of South Central Chile: A Study Based on Flow Recession Records

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