4.8 Article

Desert Abiotic Carbon Sequestration Weakening by Precipitation

Journal

ENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume 57, Issue 18, Pages 7174-7184

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.est.2c09470

Keywords

Taklimakan Desert; desert carbon sequestration; CO2 flux; hydrothermal interaction; ensemble empirical mode decomposition (EEMD)

Ask authors/readers for more resources

Heavy precipitation accelerates the weakening of abiotic carbon sequestration in deserts under global warming and intensified water cycle. High soil moisture stimulates sand to release CO2 at a rapid speed by increasing microbial activity and organic matter diffusion.
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.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.8
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available