Assessing terrestrial water storage variations in Afghanistan using GRACE and FLDAS-Central Asia data

Journal of Hydrology Regional Studies, Journal Year: 2024, Volume and Issue: 55, P. 101906 - 101906

Published: July 30, 2024

Afghanistan, Central Asia. In this study, we evaluated the terrestrial water storage dynamics in Afghanistan and its five major river basins using anomalies (TWSA) from three Gravity Recovery Climate Experiment (GRACE) mascons observations JPL, CSR, GSFC processing centers, Famine Early Warning Systems Network (FEWS NET) Land Data Assimilation System – Asia (FLDAS-CA) simulation. Since 2008, due to intense prolonged drought conditions groundwater overexploitation, TWS has been decreasing at an alarming rate. The average slopes of TWSA trend for GRACE period (2003–2016) products range between − 3.6 4.8 mm/year. decrease is further exacerbated during GRACE-FO (2019–2022), ranging 20.4 30 Because heavily relied on country but human-induced change (i.e., extraction) not simulated FLDAS-CA, a significant difference could be observed FLDAS-CA results, especially following after each severe event (e.g., 2018) when substantial extraction occurred. assimilation into framework will undoubtedly have positive impact decision-makers local stakeholders preparing mitigating impacts overexploitation

Language: Английский

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Drought Characterization Using Multiple Indices over the Abbay Basin, Ethiopia

Water, Journal Year: 2024, Volume and Issue: 16(21), P. 3143 - 3143

Published: Nov. 3, 2024

Analyzing agricultural and hydrological drought at different timescales is essential for designing adaptation strategies. This study aimed to assess in the Abbay Basin of Ethiopia by using multiple indices, namely standardized precipitation index (SPI), evapotranspiration (SPEI), normalized difference vegetation (NDVI), condition (VCI), severity (DSI). Climate extremes were assessed over between 1981 2022. The results indicate that years 1982 2014 most drought-prone, while year 1988 was wettest Basin. revealed presence extremely dry severely conditions, potentially impacting output region. Agricultural identified during main crop seasons (June September). VCI indicated wet conditions. In 2012, 65% area affected extreme nearly half experienced 2013 DSI occurrence drought, although spatial coverage conditions lower than other indices. 2003, 78.49% moderate whereas severe 20% 2010, about 90% drought. provides valuable insights communities, enabling them mitigate impact on yields utilizing An adequate knowledge policymakers potential effects socioeconomic activities recognize significance implementing climate change measures.

Language: Английский

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Using satellite-derived land surface temperatures to clarify the spatiotemporal warming trends of the Alborz Mountains in northern Iran

Journal of Mountain Science, Journal Year: 2024, Volume and Issue: 21(2), P. 449 - 469

Published: Feb. 1, 2024

Abstract The Alborz Mountains are some of the highest in Iran, and they play an important role controlling climate country’s northern regions. land surface temperature (LST) is variable that affects ecosystem this area. This study investigated spatiotemporal changes trends nighttime LST western region Central at elevations 1500–4000 m above sea level. MODIS data were extracted for period 2000–2021, Mann–Kendall nonparametric test was applied to evaluating LST. results indicated a significant increasing trend monthly average May–August along southern aspect. Both aspects showed decreasing October, November, March other months. At all elevations, decadal change more severe aspect (0.60°C) than (0.37°C). difference between decreased cold months but increased hot same elevation, lapse rate greater With disappeared. Climate concluded greatly decrease different April–July.

Language: Английский

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Rapid response of soil GHG emissions and microbial parameters to the addition of biochar and the freeze-thaw cycle

International Agrophysics, Journal Year: 2023, Volume and Issue: 37(3), P. 341 - 352

Published: Sept. 13, 2023

1. Andersen A.J. and Petersen S.O., 2009. Effects of C N availability soil-water potential interactions on N2O evolution PLFA composition. Soil Biol. Biochem., 41, 1726-1733, https://doi.org/10.1016/j.soil.... CrossRef Google Scholar

Language: Английский

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Investigating the Relationship between Precipitation and Vegetation Dynamics with Emphasis on Agricultural Land Cover in the Atrak Basin Area

Atmosphere, Journal Year: 2024, Volume and Issue: 15(4), P. 489 - 489

Published: April 15, 2024

The present study aimed to analyze the dynamics of vegetation within Atrak catchment area, as well its interplay with precipitation patterns. Moreover, additional emphasis was placed on exploring impact these agricultural land cover type. To achieve this objective, Enhanced Vegetation Index (EVI) derived from MODIS data and Comprehensive Historical Real-Time Satellite-based Precipitation (CHRIPS) were utilized for period 2003 2021. Additionally, Condition (VCI) Standardized (SPI) employed discern various degrees drought pluvial years basin. revealed that 2008, 2014, 2017, 2021 exhibited lowest coverage, while 2010, 2016, 2019 showcased most extensive extent. Notably, it VCI index year 2008 driest, 2016 wettest. Furthermore, based SPI findings, 2007, 2019, 2020 identified years, in conditions occurred. All other classified exhibiting normal conditions. Regarding seasonality, observations ascertain spring season substantiates cover, a high correlation between coverage observed. anomaly detection outcomes indicate eastern regions basin have experienced an upward trend compared average first decade studied period.

Language: Английский

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