Land surface dynamics and meteorological forcings modulate land surface temperature characteristics

Sustainable Cities and Society, Год журнала: 2023, Номер 101, С. 105072 - 105072

Опубликована: Ноя. 21, 2023

This study examines the effect of land cover, vegetation health, climatic forcings, elevation heat loads, and terrain characteristics (LVCET) on surface temperature (LST) distribution in West Africa (WA). We employ fourteen machine-learning models, which preserve nonlinear relationships, to downscale LST other predictands while preserving geographical variability WA. Our results showed that random forest model performs best downscaling predictands. is important for sub-region since it has limited access mainframes power multiplex algorithms. In contrast northern regions, southern regions consistently exhibit healthy vegetation. Also, areas with unhealthy coincide hot clusters. The positive Normalized Difference Vegetation Index (NDVI) trends Sahel underscore rainfall recovery subsequent Sahelian greening. southwesterly winds cause upwelling cold waters, lowering WA highlighting cooling influence water bodies LST. Identifying elevated paramount prioritizing greening initiatives, our underscores importance considering LVCET factors urban planning. Topographic slope-facing angles, diurnal anisotropic all contribute variations LST, emphasizing need a holistic approach when designing resilient sustainable landscapes.

Язык: Английский

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Minimizing uncertainties in climate projections and water budget reveals the vulnerability of freshwater to climate change

One Earth, Год журнала: 2024, Номер 7(1), С. 72 - 87

Опубликована: Янв. 1, 2024

Global water scarcity threatens agriculture, food security, and human sustainability. Hence, understanding changes in terrestrial storage (WS) is crucial. By utilizing climate models, reanalysis, satellite data, we demonstrate the effectiveness of multivariate bias correction technique facilitating precise WS representation while ensuring robust budget closure. Historical data indicate seasonal changes, where forested basins exhibit a surplus December-January-February season, with reversal June-July-August-September season. Non-forested display varied patterns influenced by geographical location land use type. Future projections increased deficits most Southern Hemisphere under middle-road (SSP 245) scenario wetter conditions regional rivalry 370) scenario. Weather systems governing vary season basin, resulting inconsistent moisture intake into basins. These findings underscore intricate interplay between transport, characteristics, WS, highlighting need to understand these complex interactions for effective resource management strategies changing climates.

Язык: Английский

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Global vegetation, moisture, thermal and climate interactions intensify compound extreme events

The Science of The Total Environment, Год журнала: 2023, Номер 912, С. 169261 - 169261

Опубликована: Дек. 12, 2023

Compound extreme events, encompassing drought, vegetation stress, wildfire severity, and heatwave intensity (CDVWHS), pose significant threats to societal, environmental, health systems. Understanding the intricate relationships governing CDVWHS evolution their interaction with climate teleconnections is crucial for effective adaptation strategies. This study leverages remote sensing, reanalysis data, models analyze during historical (1982–2014), near-future (2028–2060), far-future (2068–2100) periods under two Shared Socioeconomic Pathways (SSP; 245 585). Our results show that reduced health, unfavorable temperature conditions, low moisture conditions have negligible effects on density. However, they worsen of heatwaves increase risk wildfires. Wildfires can persist when thermal are poor despite favorable levels. For example, adequate availability, we link 2012 Siberian in Ob basin anomalous negative concurrent thermal-moisture conditions. In contrast, Amazon experiences exceptional drought associated same year. A comparative analysis North American fires reveals distinct burned area anomalies due variations density fuel. The lower positive areas because density, which amount Furthermore, examine basin-specific variability related compound CDVWHS, revealing primary modes through teleconnection patterns. Moreover, a substantial magnitude severity emerges between near far future SSP 585. underscores urgency targeted actions enhance ecosystem resilience safeguard vulnerable communities from impacts. Identifying hotspots comprehending complex environmental factors essential developing strategies changing climate.

Язык: Английский

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Spatiotemporal shallow and deep groundwater dynamics in a forested mountain catchment with diverse slope gradients, western Japan

Groundwater for Sustainable Development, Год журнала: 2024, Номер 25, С. 101150 - 101150

Опубликована: Март 9, 2024

Язык: Английский

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Estimating groundwater recharge across Africa during 2003–2023 using GRACE-derived groundwater storage changes

Journal of Hydrology Regional Studies, Год журнала: 2024, Номер 56, С. 102046 - 102046

Опубликована: Ноя. 4, 2024

Язык: Английский

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Climate change is intensifying rainfall erosivity and soil erosion in West Africa

The Science of The Total Environment, Год журнала: 2024, Номер 955, С. 177174 - 177174

Опубликована: Ноя. 2, 2024

Soil erosion is a critical environmental challenge with significant implications for agriculture, water quality, and ecosystem stability. Understanding its dynamics essential sustainable management societal welfare. Here, we analyze rainfall erosivity patterns across West Africa (WAF) during the historical (1982-2014), near future (2028-2060), far (2068-2100) periods under Shared Socioeconomic Pathways (SSPs 370 585). Using bias-corrected-downscaled (BCD) climate models validated against reference data, ensure an accurate representation of rainfall-a key driver (R-factor) soil erosion. We compare Renard's approach Modified Fournier Index (MFI) to calculate R-factor note strong correlation. However, method shows slightly lower accuracy in Sierra Leone, Guinea, The Gambia, likely due inability capture high-intensity, short-duration events. In contrast, MFI, utilizing continuous rain gauge proves more reliable these regions. also attribute fluctuations erosivity, such as those seen 2003 floods, synoptic weather influenced by multiple processes. Furthermore, our analysis reveals regions where could exceed 20 t/ha/yr change. Under SSP scenario, WAF projected rise 14.84 % 18.65 future, increasing further 585 19.86 23.49 %, respectively. most severe increases are expected Benin Nigeria, Nigeria potentially facing 66.41 585. These findings highlight region's exposure intensified climatic conditions underscore urgent need targeted adaptation strategies mitigate erosion's ecological socioeconomic impacts.

Язык: Английский

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Comparison of groundwater storage changes over losing and gaining aquifers of China using GRACE satellites, modeling and in-situ observations

The Science of The Total Environment, Год журнала: 2024, Номер 938, С. 173514 - 173514

Опубликована: Май 25, 2024

Язык: Английский

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Interaction between intermittent river and groundwater in arid and semiarid basin considering the influence of evaporation on isotopic compositions

Journal of Hydrology Regional Studies, Год журнала: 2024, Номер 54, С. 101876 - 101876

Опубликована: Июнь 24, 2024

Study region: Tabu Basin is located on a typical-deserted steppe in Inner Mongolia, China and plays significant role maintaining ecological stability of northern China. focus: Among rivers worldwide, 51–60 % cease to flow for at least one day annually, especially arid semiarid areas. Understanding interactions between intermittent (IRs) groundwater (GW) crucial protecting water resources sustaining balance. A comprehensive framework was developed analyze these interactions. New hydrological insights the Unlike previous studies, this study considered seasonal differences hydrochemical isotopic compositions IR GW, as well intensive influence evaporation. Multitemporal datasets were employed IR–GW interaction across spatial, temporal, profiling scales. Hydrochemical evidence analysis indicated input meltwater with depleted signatures GW recharge IR. The followed order rainfall <

Язык: Английский

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Machine learning downscaling of GRACE/GRACE-FO data to capture spatial-temporal drought effects on groundwater storage at a local scale under data-scarcity

ENVIRONMENTAL SYSTEMS RESEARCH, Год журнала: 2024, Номер 13(1)

Опубликована: Сен. 3, 2024

The continued threat from climate change and human impacts on water resources demands high-resolution continuous hydrological data accessibility for predicting trends availability. This study proposes a novel threefold downscaling method based machine learning (ML) which integrates: normalization; interaction of hydrometeorological variables; the application time series split cross-validation that produces high spatial resolution groundwater storage anomaly (GWSA) dataset Gravity Recovery Climate Experiment (GRACE) its successor mission, GRACE Follow-On (GRACE-FO). In study, relationship between terrestrial (TWSA) other land surface variables (e.g., vegetation coverage, temperature, precipitation, in situ level data) is leveraged to downscale GWSA. predicted downscaled GWSA datasets were tested using monthly observations, results showed model satisfactorily reproduced temporal variations area, with Nash-Sutcliffe efficiency (NSE) correlation coefficient values 0.8674 (random forest) 0.7909 (XGBoost), respectively. Evapotranspiration was most influential predictor variable random forest model, whereas it rainfall XGBoost model. particular, excelled aligning closely observed patterns, as evidenced by positive correlations lower error metrics (Mean Absolute Error (MAE) 54.78 mm; R-squared (R²) 0.8674). 5 km (based decreasing trend associated variability pattern. An increase drought severity during El Niño lengthened full recovery historical trends. Furthermore, lag occurrence precipitation recharge likely controlled intensity characteristics aquifer. Projected increases could further times response droughts changing climate, resetting new tipping condition. Therefore, adaptation strategies must recognise less will be available supplement supply droughts.

Язык: Английский

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Groundwater in Southern Algeria Provinces: Challenges and Strategies

Springer water, Год журнала: 2025, Номер unknown, С. 179 - 215

Опубликована: Янв. 1, 2025

Язык: Английский

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