Response of net ecosystem CO2 exchange to precipitation events in the Badain Jaran Desert

Yang, Ping; Zhao, Liqiang; Liang, Xi-Ying; Niu, Zhenmin; Zhao, Hang; Wang, Yuanyuan; Wang, Nai’ang

doi:10.1007/s11356-021-18229-0

Cited by 9 publications

(2 citation statements)

References 56 publications

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“…This phenomenon, i.e., that precipitation stimulated the desert to release CO 2 , is similar to the research results of Ma et al and Sagi et al Under the background that global warming has intensified the water cycle, the increase in total precipitation and extreme precipitation events will accelerate the attenuation of the current carbon sink rate of 1.6 million tons per year of shifting sand in the TD . However, it is different from the phenomenon that the carbon sink intensity increased with an increase in precipitation in the Chihuahua Desert, the Mu Us Desert, and the Badain Jaran Desert . Different deserts will cause different responses of CO 2 flux to precipitation due to different soil properties.…”

Section: Discussionsupporting

confidence: 87%

“…7 However, it is different from the phenomenon that the carbon sink intensity increased with an increase in precipitation in the Chihuahua Desert, 37 the Mu Us Desert, 38 and the Badain Jaran Desert. 39 Different deserts will cause different responses of CO 2 flux to precipitation due to different soil properties. In addition, the enhancement of the desert carbon sink by precipitation may be closely related to the mentioned desert not being completely nonvegetated.…”

Section: Precipitation Stimulates the Release Of Co 2 From Nonvegetat...mentioning

confidence: 99%

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Desert Abiotic Carbon Sequestration Weakening by Precipitation

Yang

Huang

Zhou

et al. 2023

Environ. Sci. Technol.

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Desert carbon sequestration plays an active role in promoting carbon neutralization. However, the current understanding of the effect of hydrothermal interactions and soil properties on desert carbon sequestration after precipitation remains unclear. Based on the experiment in the hinterland of the Taklimakan Desert, we found that the heavy precipitation will accelerate the weakening of abiotic carbon sequestration in deserts under the background of global warming and intensified water cycle. The high soil moisture can significantly stimulate sand to release CO2 at an incredible speed by rapidly increasing microbial activity and organic matter diffusion. At this time, the CO2 flux in the shifting sand was synergistically affected by soil temperature and soil moisture. As far as soil properties are concerned, with less organic carbon substrate and stronger soil alkalinity, the carbon sequestration of shifting sand is gradually highlighted and strengthened at low temperature. On the contrary, the carbon sequestration of shifting sand is gradually weakened. Our study provides a new way to assess the contribution of desert to the global carbon cycle and improve the accuracy and scope of application.

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Section: Discussionsupporting

confidence: 87%

Section: Precipitation Stimulates the Release Of Co 2 From Nonvegetat...mentioning

confidence: 99%

Desert Abiotic Carbon Sequestration Weakening by Precipitation

Yang

Huang

Zhou

et al. 2023

Environ. Sci. Technol.

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Precipitation Controls on Carbon Sinks in an Artificial Green Space in the Taklimakan Desert

Sun,

Yang,

Huang

et al. 2024

Adv. Atmos. Sci.

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Variables controlling growing season carbon dynamics in desert shrub ecosystem

Şaylan,

Kimura,

Başakin

et al. 2024

Theor Appl Climatol

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Arid and semi-arid lands (drylands) are under the influence of extreme environmental conditions and cover large areas on Earth’s land surface. Determining temporal and spatial variations of the greenhouse gas and energy exchange in these ecosystems will provide a better understanding of both, the dynamics between the drylands’s surface and the atmosphere and the importance in climate change. In this study, CO2 exchanges over a shrub steppe ecosystem were determined using the Eddy Covariance method during both dry and wet growing seasons in the Gobi Desert, Mongolia. The net ecosystem exchange (NEE) was modeled using the extreme gradient boosting method (XGBOOST). Variables influencing NEE were estimated employing the SHapley Additive exPlanations algorithm (SHAP). The XGBOOST predictions demonstrated impressive results across all growing seasons, with high performance metrics (R2 = 0.821; NSE = 0.817), particularly notable during the wet season (R2 = 0.932; NSE = 0.929). The total NEE changed between 79.7 and -110.4 gC m−2 throughout the growing seasons. Especially the precipitation before the growing period has a positive impact on carbon sequestration in the shrub ecosystem in the following dry season. A high similarity was found in the patterns of daily NEE of all growing seasons and normalized difference vegetation index (NDVI), albedo, soil water content, temperature, sensible heat flux, the difference between air and soil temperature in desert shrub ecosystem. Although NDVI was the dominant factor during the wet season, there was a weaker relationship between these factors and NEE in the dry season than in the wet season.

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Response of net ecosystem CO2 exchange to precipitation events in the Badain Jaran Desert

Cited by 9 publications

References 56 publications

Desert Abiotic Carbon Sequestration Weakening by Precipitation

Desert Abiotic Carbon Sequestration Weakening by Precipitation

Precipitation Controls on Carbon Sinks in an Artificial Green Space in the Taklimakan Desert

Variables controlling growing season carbon dynamics in desert shrub ecosystem

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