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- W4313331982 abstract "Rapid and comprehensive lockdowns to contain the coronavirus 2019 (COVID-19) pandemic reduced anthropogenic emissions and, thereby, decreased the aerosol optical depth (AOD) in Xiangyang, Hubei Province. However, their complicated interactions make quantifying the contribution of decreased aerosols to crop growth challenging. Here, we explored the indirect effects of decreased aerosol concentrations on the gross primary productivity (GPP) and water use efficiency (WUE) of winter wheat by quantifying the contributions of key environmental factors. Our results showed high temporal and spatial associations between aerosols (represented by AOD), GPP, and WUE before, during, and after the COVID-19 pandemic. AOD decreased by 23.8 % ± 10.1 % , whereas GPP and WUE increased by 16.5 % ± 5.8 % and 17.0 % ± 15.3 % , respectively. The GeoDetector model revealed that photosynthetically active radiation (PAR) had a major impact on GPP and WUE, followed by precipitation, surface soil moisture, subsurface soil moisture, and surface temperature. Moreover, causality analysis showed a causal relationship between AOD and the dominant factors (PAR and precipitation) during the lockdown, thereby indicating a positive effect of decreased aerosols on GPP and WUE changes of winter wheat. Our findings assist in understanding the mechanisms causing GPP and WUE changes, given the environmental factors that changed significantly during the pandemic." @default.
- W4313331982 created "2023-01-06" @default.
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- W4313331982 date "2022-12-29" @default.
- W4313331982 modified "2023-09-26" @default.
- W4313331982 title "Impact of decreased aerosols during the COVID-19 pandemic on winter wheat gross primary productivity and water use efficiency" @default.
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- W4313331982 doi "https://doi.org/10.1117/1.jrs.16.048507" @default.
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