From Hydrometeorology to River Water Quality: Can a Deep Learning Model Predict Dissolved Oxygen at the Continental Scale?

Environmental Science & Technology, Journal Year: 2021, Volume and Issue: 55(4), P. 2357 - 2368

Published: Feb. 3, 2021

Dissolved oxygen (DO) reflects river metabolic pulses and is an essential water quality measure. Our capabilities of forecasting DO however remain elusive. Water data, specifically data here, often have large gaps sparse areal temporal coverage. Earth surface hydrometeorology on the other hand, become largely available. Here we ask: can a Long Short-Term Memory (LSTM) model learn about dynamics from intensive (daily) data? We used CAMELS-chem, new set with concentrations 236 minimally disturbed watersheds across U.S. The generally learns theory solubility captures its decreasing trend increasing temperature. It exhibits potential predicting in "chemically ungauged basins", defined as basins without any measurements broadly general. misses some peaks troughs when in-stream biogeochemical processes important. Surprisingly, does not perform better where more are Instead, it performs low variations streamflow DO, high runoff-ratio (>0.45), winter precipitation peaks. Results here suggest that collections at sparsely monitored areas to overcome issue scarcity, outstanding challenge community.

Language: Английский

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High‐Resolution Data Sets for Global Carbonate and Silicate Rock Weathering Carbon Sinks and Their Change Trends

Earth s Future, Journal Year: 2022, Volume and Issue: 10(8)

Published: July 14, 2022

Abstract The Carbonate rock weathering Carbon Sink (CCS) and Silicate (SCS) play a significant role in the carbon cycle global climate change. However, spatial‐temporal patterns trends of CCS SCS from 1950 to 2099 have not been systematically quantified. Thus, Supported by long‐term hydrometeorological data under RCP8.5, we use accepted Suchet Hartmann models determine following. First, found except for difference their rates, covers 37.2 million km 2 more area than CCS. Flux (CCSF) (SCSF) are 5.36 1.22 t/km /yr, respectively. Similarly, Full (FCCS, 0.3 Pg/yr) is (FSCS, 0.08 Pg/yr). Furthermore, (7.01 kg/km ) (3.95 state overall increase. In addition, mid‐to‐high latitudes northern hemisphere aggravated warming (0.03°C) humidity (0.65 mm), while decrease runoff mid‐latitudes southern reduces karstification. Specifically, 2099, CCSF will 5.72%. Instead, lower exhibit gentle upward slope. Particularly, peak regions FCCS (65.63 Tg/yr) FSCS (33.01 tropical zone. conclusion, this study contributes high‐resolution long‐time series CS datasets SCS. We provide theory solving terrestrial sink loss.

Language: Английский

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River water quality shaped by land–river connectivity in a changing climate

Nature Climate Change, Journal Year: 2024, Volume and Issue: 14(3), P. 225 - 237

Published: March 1, 2024

Language: Английский

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The Deep Soil Organic Carbon Response to Global Change

Annual Review of Ecology Evolution and Systematics, Journal Year: 2023, Volume and Issue: 54(1), P. 375 - 401

Published: Aug. 22, 2023

Over 70% of soil organic carbon (SOC) is stored at a depth greater than 20 cm belowground. A portion this deep SOC actively cycles on annual to decadal timescales and sensitive global change. However, responses change likely differ from surface because biotic controls cycling become weaker as mineral predominate with depth. Here, we synthesize the current information drivers warming, shifting precipitation, elevated CO 2 , land use cover Most can only be hypothesized few studies measure soils, even fewer experiments manipulate soils. We call scientists incorporate soils into their manipulations, measurements, models so that response accounted for in projections nature-based climate solutions terrestrial feedbacks

Language: Английский

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Resolving controversies surrounding carbon sinks from carbonate weathering

Science China Earth Sciences, Journal Year: 2024, Volume and Issue: 67(9), P. 2705 - 2717

Published: Aug. 8, 2024

Language: Английский

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Embracing the dynamic nature of soil structure: A paradigm illuminating the role of life in critical zones of the Anthropocene

Earth-Science Reviews, Journal Year: 2021, Volume and Issue: 225, P. 103873 - 103873

Published: Nov. 26, 2021

Language: Английский

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RUSSELL REVIEW Are plant roots only “in” soil or are they “of” it? Roots, soil formation and function

European Journal of Soil Science, Journal Year: 2022, Volume and Issue: 73(1)

Published: Jan. 1, 2022

Abstract Roots are near‐ubiquitous components of soils globally but have often been regarded as separate from the soil rather than a substantial factor in determining what is and how it functions. The start rapid formation commenced about 400 million years ago with emergence vascular plants evolution roots associated microbes. microorganisms contribute significantly to by altering rocks minerals through variety biogeochemical processes supply carbon depth that can long residence times. Living root inputs via rhizodeposits more efficient shoot litter forming slow‐cycling, mineral‐associated organic pools. current functionality providing food fuel fibres, supplying plant nutrients, filtering water flood regulation, disease suppression all dependent on activities roots. actively communicating collaborating other organisms for mutual benefit, signals underlying this modulation rhizosphere microbiome being identified. In review I examine (an organ not an organism) affect function conclude that, several perspectives, just “in” “of” definitions should recognise this. A possible definition is: “Soils altered surficial rock or sediment, composed matter, minerals, fluids, whose influenced weathering interactions these roots.” Highlights Paleoclimatic paleosoil research shows key role mycorrhiza formation. Deep living contributors long‐term C storage. Root/microbe signalling facilitates mutualistic symbioses, nutrient uptake suppression. Definitions explicitly include important component system.

Language: Английский

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Vertical Connectivity Regulates Water Transit Time and Chemical Weathering at the Hillslope Scale

Water Resources Research, Journal Year: 2021, Volume and Issue: 57(8)

Published: July 13, 2021

Abstract How does hillslope structure (e.g., shape and permeability variation) regulate its hydro‐geochemical functioning (flow paths, solute export, chemical weathering)? Numerical reactive transport experiments particle tracking were used to answer this question. Results underscore the first‐order control of variations (with depth) on vertical connectivity (VC), defined as fraction water flowing into streams from below soil zone. Where decreases sharply VC is low, >95% flows through top 6 m subsurface, barely interacting with rock at depth. High also elongates mean transit times (MTTs) weathering rates. however less an influence under arid climates where long drive equilibrium. The results lead three working hypotheses that can be further tested. H1 : depth MTTs stream more strongly than shapes; shapes instead younger . H2 arising high depths enhances by promoting deeper penetration water‐rock interactions; weakens larger hillslopes longer H3 regulates contrasts between shallow deep waters (C ratio ) export patterns encapsulated in power law slope b concentration‐discharge (CQ) relationships Higher leads similar versus chemistry ∼1) chemostatic CQ Although supporting data already exist, these tested carefully designed, co‐located modeling measurements soil, rock, waters. Broadly, importance subsurface indicate it essential regulating earth surface hydrogeochemical response changing climate human activities.

Language: Английский

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From Soils to Streams: Connecting Terrestrial Carbon Transformation, Chemical Weathering, and Solute Export Across Hydrological Regimes

Water Resources Research, Journal Year: 2022, Volume and Issue: 58(7)

Published: June 13, 2022

Abstract Soil biota generates carbon that exports vertically to the atmosphere (CO 2 ) and transports laterally streams rivers (dissolved organic inorganic carbon, DOC DIC). These processes, together with chemical weathering, vary flow paths across hydrological regimes; yet an integrated understanding of these interactive processes is still lacking. Here we ask: How what extent do subsurface transformation, solute export differ structure regimes? We address this question using a hillslope reactive transport model calibrated soil CO water chemistry data from Fitch, temperate forest at ecotone boundary Eastern mid‐continent grasslands in Kansas, USA. Model results show droughts (discharge 0.08 mm/day) promoted deeper paths, longer transit time, carbonate precipitation, mineralization (OC) into (IC) (∼98% OC). Of IC produced, ∼86% was emitted upward as gas ∼14% exported DIC stream. Storms (8.0 led dissolution but reduced OC (∼88% OC) production (∼12% lateral fluxes (∼53% produced IC). Differences shallow‐versus‐deep permeability contrasts smaller difference (<10%) than discharge‐induced differences were most pronounced under wet conditions. High (low vertical connectivity) enhanced fluxes. generally delineate hillslopes active producers transporters dry conditions, transporter

Language: Английский

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Deep root activity overprints weathering of petrogenic organic carbon in shale

Earth and Planetary Science Letters, Journal Year: 2023, Volume and Issue: 607, P. 118048 - 118048

Published: March 3, 2023

Language: Английский

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