Effects of aerosol on terrestrial gross primary productivity in Central Asia

Ma, Wen; Ding, Jianli; Wang, Jinlong; Zhang, Junyong

doi:10.1016/j.atmosenv.2022.119294

Cited by 11 publications

(7 citation statements)

References 59 publications

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“…The vegetation GPP was dominated by a slight upward trend from 2000 to 2018 in Central Asia, which corresponded with the findings for the GPP in Central Asian countries estimated based on MODIS products [77]. The lowest value of vegetation GPP occurred in 2008, and this inflection point was due to the severe drought that occurred in In this study, the dominant effects of different vegetation types were further investigated.…”

Section: Spatial and Temporal Distribution Of Vegetation And Droughtsupporting

confidence: 86%

Stronger Cumulative than Lagged Effects of Drought on Vegetation in Central Asia

Yang,

Zou,

Ding

et al. 2023

Forests

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In the context of global warming, the strength and frequency of drought events are projected to grow in the future, and the onset of drought can have dramatic effects on vegetation growth in terrestrial ecosystems. Central Asia is the largest non-territorial drought area in the world, and the response of vegetation to drought events is extremely sensitive in the area. However, few studies have quantified and compared the vegetation gross primary productivity (GPP) response to the lagged and cumulative effects of drought. In this research, the solar-induced chlorophyll fluorescence GPP and Standardized Precipitation Evaporation Index (SPEI) were used to analyze the time and space patterns of vegetation GPP and the SPEI in Central Asia and to quantify and compare the lagged and cumulative effects of drought on the GPP of various vegetation types. During the period from 2000 to 2018, the general trends of vegetation GPP showed a slight increase in Central Asia, with the ratio of variation being 1.35 g C m−2 y−1 and a spatially decreasing distribution from north to south. SPEI showed a trend of decreasing and then increasing over a period of 19 years, with a slight decreasing (drying) trend and a rate of change of −0.02 y−1, and the overall spatial pattern was drying out from north to south. In 13 months, 72.44% of regional droughts had lagged impacts on vegetation. The maximum correlation coefficients of vegetation and the lagged effectiveness of drought were concentrated in the range of 0.15–0.35, and the high correlation was distributed in southern and northwestern Kazakhstan, which are prairie regions. Of the regions in Central Asia, 75.86% showed cumulative drought effects concentrated at 9–12 months. The maximum correlation coefficients were concentrated in the range of 0.20–0.50, and the high correlation regions were primarily situated in south Kazakhstan and east Uzbekistan. Comparing the correlation coefficients of the lagged effect of vegetation GPP and SPEI with the cumulative effect shows that the cumulative rather than lagged impacts of drought on vegetation cover were found in 86.75% of the regions in Central Asia. This research enhances our comprehension of the influence of drought events on ecosystems in arid regions and has a certain reference value for helping arid region ecosystems to cope with global climate change.

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Section: Spatial and Temporal Distribution Of Vegetation And Droughtsupporting

confidence: 86%

Stronger Cumulative than Lagged Effects of Drought on Vegetation in Central Asia

Yang,

Zou,

Ding

et al. 2023

Forests

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“…Xinjiang is in western China and has a dry temperate continental climate. Desert and gobi are widely distributed in this region (Ma et al ., 2022a). Xinjiang is divided into northern and southern regions by the Tianshan Mountains.…”

Section: Methodsmentioning

confidence: 99%

“…Some studies have found that topography, elevation, and vegetation cover have significant effects on the concentration and dispersion of aerosols (Shi et al ., 2018). Population density (POP), industrial production, and land use type (LUT) have varying effects on aerosols (He et al ., 2018; Ma et al ., 2022a). Schwanghart and Schütt (2008) investigated the relationship between dust aerosols and meteorological factors and found that the height of dust aerosols during the Harmattan wind season depends on a change in atmospheric pressure in the Mediterranean region.…”

Section: Introductionmentioning

confidence: 99%

Spatial heterogeneity and driving factors of aerosol in Western China: Analysis on multiangle implementation of atmospheric correction–aerosol optical depth in Xinjiang over 2001–2019

Ding

Jin

2022

Intl Journal of Climatology

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Knowledge of aerosol dynamics is essential to combating atmospheric aerosol pollution, and there is a growing interest in aerosol changes and their drivers. However, the effects of interactions between natural and anthropogenic drivers of aerosol are not well understood. Here, we analyse changes in aerosol optical depth (AOD) in Xinjiang, China using the multiangle implementation of atmospheric correction aerosol products over 2001–2019 and investigate the driving factors of aerosol dynamics using a random forest (RF) and a geographical detector. The results show the dominant AOD changes in the quasi‐period of 3.21 months, 7.86 months, 1.19 years, for seasonal, half‐year, and interannual variations of aerosols. The increasing and then decreasing nonlinear trends were observed in the interannual AOD variation during 19 years period. The importance ranking results of the two models indicated that meteorological factors dominated the spatial distribution of AOD in Xinjiang (72.73% for RF and 65.78% for the geographic detector), and that interactions between factors enhanced the explanatory power in AOD changes. In addition, the influence of anthropogenic factors on AOD was increasing in North Xinjiang, and the influence of precipitation and population on AOD was increasing in East Xinjiang. However, the influence of drivers on AOD in South Xinjiang was basically constant over time, showing the spatially heterogeneous relationship between AOD and drivers. This study emphasized the spatial heterogeneity and driving factors of small‐scale aerosols in arid regions and so can guide targeted air pollution prevention and control in local areas.

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“…In recent years, it has been concluded that aerosol optical depth (AOD) can enhance scattered radiation by weakening direct radiation and total radiation, thereby promoting or inhibiting vegetation photosynthesis [38]. This has attracted increasing attention from scholars to the impact of AOD on GPP [39]. At the regional scale, GPP was significantly positively correlated with AOD in most of the regions.…”

Section: The Influence Of Climate Change On China's Dynamic Changes I...mentioning

confidence: 99%

Exploring the Spatiotemporal Alterations in China’s GPP Based on the DTEC Model

Peng,

Xue,

Pan

et al. 2024

Remote Sensing

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Gross primary productivity (GPP) is a reliable measure of the carbon sink potential of terrestrial ecosystems and is an essential element of terrestrial carbon cycle research. This study employs the diffuse fraction-based two-leaf light-use efficiency (DTEC) model to imitate China’s monthly GPP from 2001 to 2020. We studied the trend of GPP, investigated its relationship with climatic factors, and separated the contributions of climate change and human activities. The findings showed that the DTEC model was widely applicable in China. During the study period, China’s average GPP increased significantly, by 9.77 g C m−2 yr−1 (p < 0.001). The detrimental effect of aerosol optical depth (AOD) on GPP was more widespread than that of total precipitation, temperature, and solar radiation. Areas that benefited from AOD, such as Northwest China, experienced significant increases in GPP. Climate change and human activities had a primary and positive influence on GPP during the study period, accounting for 28% and 72% of the increase, respectively. Human activities, particularly ecological restoration projects and the adoption of advanced agricultural technologies, played a significant role in China’s GPP growth. China’s afforestation plan was particularly notable, with the GPP increasing in afforestation areas at a rate greater than 10 g C m−2 yr−1. This research provides a theoretical foundation for the long-term management of China’s terrestrial ecosystems and helps develop adaptive ecological restoration tactics.

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Effects of aerosol on terrestrial gross primary productivity in Central Asia

Cited by 11 publications

References 59 publications

Stronger Cumulative than Lagged Effects of Drought on Vegetation in Central Asia

Stronger Cumulative than Lagged Effects of Drought on Vegetation in Central Asia

Spatial heterogeneity and driving factors of aerosol in Western China: Analysis on multiangle implementation of atmospheric correction–aerosol optical depth in Xinjiang over 2001–2019

Exploring the Spatiotemporal Alterations in China’s GPP Based on the DTEC Model

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