Stable isotopes evidence of recycled subduction fluids in the hydrothermal/volcanic activity across Nicaragua and Costa Rica

Ramírez-Leiva, Ailyn; Sánchez‐Murillo, Ricardo; Martínez-Cruz, Maria; Calderón, Heyddy; Esquivel‐Hernández, Germain; Delgado, Valeria; Birkel, Christian; Gazel, Esteban; Alvarado, Guillermo E.; Soulsby, Chris

doi:10.1016/j.jvolgeores.2017.08.013

Cited by 8 publications

(8 citation statements)

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“…Overall, as water vapour encounters the main mountain range, orographic distillation and convergence increased, resulting in depleted rainfall across the Pacific domain. Orographic depressions enhanced the incursion of enriched‐type rainfall across the highlands of the Pacific slope, with subsequent mixing of depleted and enriched percolation into the mountainous aquifers (Esquivel‐Hernández et al, 2018; Ramírez‐Leiva et al, 2017; Sánchez‐Murillo et al, 2016b).…”

Section: Resultsmentioning

confidence: 99%

Tracer hydrology of the data‐scarce and heterogeneous Central American Isthmus

Sánchez‐Murillo

Esquivel‐Hernández

Castro‐Chacón³

et al. 2020

Hydrological Processes

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Numerous socio-economic activities depend on the seasonal rainfall and groundwater recharge cycle across the Central American Isthmus. Population growth and unregulated land use changes resulted in extensive surface water pollution and a large dependency on groundwater resources. This work combines stable isotope variations in rainfall, surface water, and groundwater of Costa Rica, Nicaragua, El Salvador, and Honduras to develop a regionalized rainfall isoscape, isotopic lapse rates, spatial-temporal isotopic variations, and air mass back trajectories determining potential mean recharge elevations, moisture circulation patterns, and surface watergroundwater interactions. Intra-seasonal rainfall modes resulted in two isotopically depleted incursions (W-shaped isotopic pattern) during the wet season and two enriched pulses during the mid-summer drought and the months of the strongest trade winds. Notable isotopic sub-cloud fractionation and near-surface secondary evaporation were identified as common denominators within the Central American Dry Corridor. Groundwater and surface water isotope ratios depicted the strong

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Section: Resultsmentioning

confidence: 99%

Tracer hydrology of the data‐scarce and heterogeneous Central American Isthmus

Sánchez‐Murillo

Esquivel‐Hernández

Castro‐Chacón³

et al. 2020

Hydrological Processes

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“…MTW 10.1029/2018JG004897Journal of Geophysical Research: Biogeosciences and DOW standards were used to normalize the results to the VSMOW2-SLAP2 scale, while CAS was used as a quality control and drift control standard. The analytical long-term uncertainty was ± 0.5 (‰; 1σ) for δ 2 H and ± 0.1 (‰; 1σ) for δ 18 O(Ramírez-Leiva et al, 2017). Stable isotope compositions are presented in delta notation δ (‰, per mil), relating the ratios (R) of 18 O/ 16 O and 2 H/ 1 H, relative to Vienna Standard Mean Ocean Water (V-SMOW).…”

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confidence: 99%

DOC Transport and Export in a Dynamic Tropical Catchment

et al. 2019

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Dissolved organic carbon (DOC) transport and export from headwater forests into freshwaters in highly dynamic tropical catchments are still understudied. Here we present a DOC analysis (2017) in a pristine and small (~2.6 km2) tropical catchment of Costa Rica. Storm flows governed a rapid surface and lateral allochthonous DOC transport (62.2% of the annual DOC export). Cross‐correlation analysis of rainfall and stream discharge indicated that DOC transport occurred on average ~1.25 hr after the rainfall maxima, with large contributions of event water, ranging from 42.4±0.3% up to 98.2±0.3% of the total discharge. Carbon export flux (annual mean=6.7±0.1 g C · m‐2 · year‐1) was greater than values reported in subtropical and temperate catchments. Specific ultraviolet absorbance indicated a mixture of hydrophobic humic and hydrophilic nonhumic matter during both baseflow and storm events. Our results highlight the rapid storm‐driven DOC transport and export as well as low biogeochemical attenuation during baseflow episodes in a climate sensitive hot spot. By understanding the key factors controlling the amount of organic carbon transported to streams in dynamic tropical landscapes, better global‐ and catchment‐scale model assessments, conservation practices, and water treatment innovations can be identified.

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“…Most of the hydrothermal manifestations are in the front volcanic arch (Pacific slope). Previous studies reported mean andesitic water contributions between 16.4% and 19.7%, based on simple two end-member models (Giggenbach and Soto, 1992;Molina and Martí, 2016;Ramírez-Leiva et al, 2017). The source of the andesitic water is most likely recycled seawater, which enters the subduction Central America zone as water-bound in hydrous mineral sub-ducting slab (Ryan and Chauvel, 2013;Zamboni et al, 2016).…”

Section: Magmatic Fluids In Volcanic Aquifersmentioning

confidence: 99%

“…(i) High frequency continental and maritime rainfall based on weekly, daily, and event-based sampling efforts across multiple biomes and elevations, including major tropical storm passages and landfalls (Sánchez-Murillo et al, 2013;Sánchez-Murillo et al, 2017a, Sánchez-Murillo et al, 2017bSánchez-Murillo et al, 2019a;Corrales-Salazar et al, 2016;Esquivel-Hernández et al, 2018Munksgaard et al, 2019;Welsh and Sánchez-Murillo, 2020). (ii) Spring water, surface water and groundwater (both timeseries and seasonal spatial snapshots), hydrothermal fluids, and soil water (Sánchez-Murillo et al, 2014, Sánchez-Murillo et al, 2017a, Sánchez-Murillo et al,2019bCorrales-Salazar et al, 2016;Ramírez-Leiva, et al, 2017;Salas-Navarro et al, 2019). (iii) Useful isotope-informed applications and estimations, such as stratiform and convective rainfall separation, high resolution isoscapes, recharge mechanisms and elevations, and contribution of magmatic fluids; and tracer-aided rainfall-runoff modeling to estimate flow pathways, runoff generation processes and water ages Birkel and Soulsby, 2016;Dehaspe et al, 2018;Sánchez-Murillo et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Tracing Water Sources and Fluxes in a Dynamic Tropical Environment: From Observations to Modeling

et al. 2020

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Tropical regions cover approximately 36% of the Earth's landmass. These regions are home to 40% of the world's population, which is projected to increase to over 50% by 2030 under a remarkable climate variability scenario often exacerbated by El Niño Southern Oscillation (ENSO) and other climate teleconnections. In the tropics, ecohydrological conditions are typically under the influence of complex land-oceanatmosphere interactions that produce a dynamic cycling of mass and energy reflected in a clear partition of water fluxes. Here, we present a review of 7 years of a concerted and continuous water stable isotope monitoring across Costa Rica, including key insights learned, main methodological advances and limitations (both in experimental designs and data analysis), potential data gaps, and future research opportunities with a humid tropical perspective. The uniqueness of the geographic location of Costa Rica within the mountainous Central America Isthmus, receiving moisture inputs from the Caribbean Sea (windward) and the Pacific Ocean (complex leeward topography), and experiencing strong ENSO events, poses a clear advantage for the use of isotopic variations to underpin key drivers in ecohydrological responses. In a sequential approach, isotopic variations are analyzed from moisture transport, rainfall generation, and groundwater/surface connectivity to Bayesian and rainfall-runoff modeling. The overarching goal of this review is to provide a robust humid tropical example with a progressive escalation from common water isotope observations to more complex modeling outputs and applications to enhance water resource management in the tropics.

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Stable isotopes evidence of recycled subduction fluids in the hydrothermal/volcanic activity across Nicaragua and Costa Rica

Cited by 8 publications

References 60 publications

Tracer hydrology of the data‐scarce and heterogeneous Central American Isthmus

Tracer hydrology of the data‐scarce and heterogeneous Central American Isthmus

DOC Transport and Export in a Dynamic Tropical Catchment

Tracing Water Sources and Fluxes in a Dynamic Tropical Environment: From Observations to Modeling

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