Climate Controls on River Chemistry

Earth s Future, Journal Year: 2022, Volume and Issue: 10(6)

Published: May 16, 2022

Abstract How does climate control river chemistry? Existing literature has examined extensively the response of chemistry to short‐term weather conditions from event seasonal scales. Patterns and drivers long‐term, baseline have remained poorly understood. Here we compile analyze data 506 minimally impacted rivers (412,801 points) in contiguous United States (CAMELS‐Chem) identify patterns chemistry. Despite distinct sources diverse reaction characteristics, a universal pattern emerges for 16 major solutes at continental scale. Their long‐term mean concentrations ( C m ) decrease with discharge Q ), elevated arid climates lower humid climates, indicating overwhelming regulation by compared local Critical Zone characteristics such as lithology topography. To understand pattern, parsimonious watershed reactor model was solved bringing together hydrology (storage–discharge relationship) biogeochemical theories traditionally separate disciplines. The derivation steady state solutions lead power law form relationships. illuminates two competing processes that determine solute concentrations: production subsurface chemical weathering reactions, export (or removal) discharge, water flushing capacity dictated vegetation. In other words, watersheds function primarily reactors produce accumulate transporters climates. With space‐for‐time substitution, these results indicate places where dwindles warming climate, will elevate even without human perturbation, threatening quality aquatic ecosystems. Water deterioration therefore should be considered global calculation future risks.

Language: Английский

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Comparison and interpretation of data-driven models for simulating site-specific human-impacted groundwater dynamics in the North China Plain

Journal of Hydrology, Journal Year: 2022, Volume and Issue: 616, P. 128751 - 128751

Published: Nov. 21, 2022

Language: Английский

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Invertebrate traits, diversity and the vulnerability of groundwater ecosystems

Functional Ecology, Journal Year: 2022, Volume and Issue: 36(9), P. 2200 - 2214

Published: June 25, 2022

Abstract Groundwater comprises the largest freshwater ecosystem on planet. It has a distinct regime of extreme, yet stable environmental conditions that have favoured development similar morphological and functional traits in resident invertebrate fauna (stygofauna). The analysis community is increasingly used as an alternative to taxonomy‐based assessments biodiversity, especially for monitoring status linking functions organisms ecological processes, it been rarely applied stygofauna groundwater ecosystems. In this paper, we review variation among important ecosystem. We focus processes alluvium fractured rock aquifers are typified by small voids fissures constrain habitats conditions. As first step, compare trait variability between surface water communities then examine significance ranges these vulnerability change. Fifteen potentially useful recognised. Eight narrower (i.e. exhibit fewer states, or attributes, particular trait) than they do water. Two wider ranges. Our synthesis suggests relative stability environments led low variability. biomass reproductive rate suggest recovery potential following disturbance likely be low. For purposes both improved understanding effective management, further work needed document additional their states fauna, enabling better relationship response effect Read free Plain Language Summary article Journal blog.

Language: Английский

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Global assessment of drought characteristics in the Anthropocene

Resources Environment and Sustainability, Journal Year: 2023, Volume and Issue: 12, P. 100105 - 100105

Published: Jan. 3, 2023

Contemporary understanding of the impacts climate change on global drought characteristics (e.g., intensities, extents) is still limited and not well understood. This knowledge critical because projected changes in are expected to impact future water availability as influence decisions how resources allocated. The main aim this study improve (extents duration) Anthropocene where rapid environment caused by composite human activities change. Multi-scale earth observation data (1980−2020) Coupled Model Intercomparison Project Phase 6 models, which incorporate Shared Socioeconomic Pathways (2040−2070 2070−2100) used assess these identify climatic hotspots could drive groundwater hydrology. Results show that towards end 21st century, land areas under will significantly decrease but their durations not. Generally, there evidence significant decline proportion experience various intensities (moderate, severe extreme drought) for each category, affected reach 30% average. Moreover, some regions potential climate-groundwater interactions events directly groundwater. varying degree strong correlations (positive negative) between Australia, Europe, Southern Africa, Asia). relatively negative indicative presence considerable lags, be aridity footprints.

Language: Английский

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Understanding global groundwater-climate interactions

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 904, P. 166571 - 166571

Published: Aug. 28, 2023

Global warming is emerging as an important predictor of water availability and future supplies across the world through inducing frequency severity in hydrological extremes. These extremes (e.g., drought) have potential impacts on groundwater, environmental flows, well increase social inequalities (limited access to by poor), among a range other issues. Understanding influence global climate groundwater systems thus critical help reshape markets policies underpinned knowledge climatic processes driving cycle freshwater supply. The main aim this study improve understanding variability using statistical methods multi-linear regression wavelet analyses). response are assessed feasibility identifying hotspots groundwater-climate interactions explored (2003-2017). Generally, plays major role distribution recharge, evidenced groundwater-rainfall relationship (r ranging from 0.6 0.8 with lags 1-5 months) several regions (Amazon Congo basins, West Africa, south Asia). Some areas where no exists coincide regional aquifer Nubian sand stone north Africa) arid domains fossil groundwater. Our results also show that fluxes driven teleconnections. Notable these teleconnections PDO, ENSO, CAR, Nino 4 PDO showing strongest (r= 0.80) some (e.g. South America). explicit Pacific ocean regulating provides opportunity prediction change impact systems. As opposed remarkably large productive basins), typically domains, could be restricted during prolonged drought, constraining persistence surface maintenance healthy surface-groundwater interactions.

Language: Английский

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