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| Impacts of winter wheat growth on regional carbon cycle in China: WRF-VPRM simulation |
| Received:February 23, 2024 |
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| KeyWord:winter wheat;carbon cycle;CO2;WRF-VPRM |
| Author Name | Affiliation | E-mail | | LIU Jing | Department of Geography and Spatial Information Techniques, Ningbo University, Ningbo 315211, China | | | SUN Weiwei | Department of Geography and Spatial Information Techniques, Ningbo University, Ningbo 315211, China | | | XU Honghui | Zhejiang Institute of Meteorological Science, Hangzhou 310017, China | | | ZHAO Shuyu | Ningbo Meteorological Bureau, Ningbo 315012, China | | | LIU Weiwei | Department of Geography and Spatial Information Techniques, Ningbo University, Ningbo 315211, China | | | YANG Gang | Department of Geography and Spatial Information Techniques, Ningbo University, Ningbo 315211, China | | | CHEN Binjie | Department of Geography and Spatial Information Techniques, Ningbo University, Ningbo 315211, China | | | REN Liyan | Department of Geography and Spatial Information Techniques, Ningbo University, Ningbo 315211, China | | | FENG Tian | Department of Geography and Spatial Information Techniques, Ningbo University, Ningbo 315211, China | fengtian@nbu.edu.cn |
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| Abstract: |
| In order to better understand the impact of the winter wheat growth on regional carbon cycle in China, this study used a meteorological model online coupled with a vegetation photosynthesis and respiration module（WRF-VPRM）that considers winter wheat photosynthesis and respiration, as well as soil microbial respiration, to simulate the CO2 fluxes during the growth of winter wheat in China in 2020. The results showed that the model could reasonably simulate the spatiotemporal variation characteristics of CO2 flux, surface CO2 concentration, and atmospheric CO2 column（The agreement index, IOA reached 0.64-0.89）. The impact of carbon flux on atmospheric CO2 during winter wheat growth mainly occurred in spring, with the strongest photosynthesis during heading stage and the strongest respiration during maturity stage, showing obvious seasonal characteristics. The growth process of winter wheat significantly affected the atmospheric CO2 concentration near the ground in North China, and the degree of influence varied greatly in different phenological periods, with the most significant decrease occurring during the heading stage of winter wheat, reaching 8.33 μmol·mol-1. Spatially, the absorption of CO2 by winter wheat at the border of Henan and Anhui provinces was more pronounced, with CO2 concentration reduction exceeding 20 μmol· mol-1 during heading stages. Winter wheat was an important participant in the carbon cycle of terrestrial ecosystems in the study area in spring, accounting for 40%. The net absorption of atmospheric CO2 by the entire growing season in 2020, calculated as C, reached 422.53 g·m-2, which has a significant impact on the regional carbon cycle process. |
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