Spatio-temporal response and projection of CO2 capture rates by different rock weathering to climate change in subtropics in China-Reference-Cited by-同舟云学术

Spatio-temporal response and projection of CO2 capture rates by different rock weathering to climate change in subtropics in China

Published:2024-03-04 Issue: Volume: Page:
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Author:

Liu Wenpu¹,Song Yinxian¹,Men Xianqiang²,Chen Zhong¹,Chang He¹,Zhang Shitao¹,Tao Chunjun³,Ji Junfeng⁴,Li Shilei⁴,Chen Quan¹,Ayoko Godwin A.⁵,Frost Ray L.⁵

Affiliation:

1. Kunming University of Science and Technology

2. Nanjing Institute of Geography and Limnology

3. Geological Survey Institute of Anhui Province

4. Nanjing University

5. Queensland University of Technology

Abstract

Abstract The capture of CO2 has become a global research focus. Rock weathering in the natural environment makes significant contributions to the stable carbon capture at both long and short time scales. However, traditional methods of estimating carbon capture potential are still uncertain due to the solely instantaneous carbon capture rates, dependence of measured data, and difficulty in predicting future carbon sink potential. Here, the estimated carbon capture potential of rock weathering using conventional methods and the PROFILE weathering model were compared for the various rocks in subtropics in China. The results showed that the carbon capture rates estimated by the GEM-CO2 model vary from 1.64 to 27.40 mmol·m− 2·d− 1, while 2.63 ~ 13.46 mmol·m− 2·d− 1 by traditional the water chemistry method. Similarly, carbon capture rates calculated by the PROFILE model based on chemical weathering rate of individual specific mineral, ranging from 0.03 to 19.03 mmol·m− 2·d− 1. The results of the PROFILE calculation showed that, the carbon capture rate was 1.30 to 1.99 times in summer than in winter due to the higher temperature and precipitation. In extreme climates, high temperatures (≥ 30°C) and heavy precipitation (≥ 25mm) have increased the capture rate of carbon dioxide by approximately 21.33% and 66.23%, respectively. On the interdecadal time scale, the carbon capture rate increased by 6.1% from 1970 to 2020, due to temperature rising by 1.4°C, precipitation increasing by 2.8%, and partial pressure of atmospheric carbon dioxide (pco2) increasing by 28.4%. Further, we predict an increase in carbon capture rates will change approximately from 4.7 to 5.1% in the period of 2020–2100 under four Representative Concentration Pathway (RCP) modes. The findings of this study will offer novel scientific recommendations and methods for future research and policy making on global carbon neutrality.

Publisher

Research Square Platform LLC

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