| Effects of climate change on dust emission rate of no-stubble farmland soils caused by wind erosion in Bashang area of Hebei Province |
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| DOI：10.7606/j.issn.1000-7601.2022.03.23 |
| Key Words: climate change no-stubble farmland soil wind erosion dust emission Bashang area |
| Author Name | Affiliation | | GONG Qian | Chinese Research Academy of Environmental Sciences, Beijing 100021, China
College of Forestry, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | WU Jianguo | Chinese Research Academy of Environmental Sciences, Beijing 100021, China | | WANG Li | College of Forestry, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| Based on the climate change data of RCP2.6, RCP4.5, RCP6.0 and RCP8.5 produced by the global climate model of NorESM1-M and calculation method of dust emission caused by soil wind erosion recommended by the Ministry of Environmental Protection of People’s Republic of China, the effects of the future climate change on the monthly, seasonal and annual emission rates of dust TSP(Total suspended particle), PM10 and PM2.5 by wind erosion of sandy loam, clay loam, loam, sandy loam, sandy soil and sandy soil were studied on no stubble farmland in Bashang area, Hebei Province. The results showed various trends of air temperature and the annual precipitation and wind speed in different climate change scenarios, with obviously fluctuating in Bashang area. Inspring, compared with the baseline scenario, the seasonal emission rates of TSP, PM10 and PM2.5 were 15%, 47%, 28% and 46% were higher in the RCP2.6, RCP4.5, RCP6.0 and RCP8.5 scenarios, respectively. In summer,the seasonal emission rates of TSP, PM10 and PM2.5 were 1%,14%, 3% and 7% higher in RCP2.6,RCP4.5, RCP6.0 and RCP8.5 scenarios than that in the baseline scenario, respectively. In autumn,the seasonal emission rates of TSP, PM10 and PM2.5 were 17%, 54%, 45% and 38% higher in RCP2.6, RCP4. 5, RCP6.0 and RCP8.5 scenarios than those in the baseline scenario, respectively, and during winter,the seasonal emission rates of TSP, PM10 and PM2.5 by soil wind erosion were 36%, 42%, 39% and 44% lower in the RCP2.6, RCP4.5, RCP6.0 and RCP8.5 scenarios than that in baseline scenario, respectively. Based on monthly calculation, emission rates of TSP, PM10 and PM2.5 in the RCP2.6, RCP4.5 and RCP6.0 scenarios were 6%, 75% and 72% lower than that in the baseline scenario, and which was 103% higher in the RCP8.5 scenario than that in the baseline scenario.Based on yearly climatic factors, the emission rates of TSP, PM10 and PM2.5 by soil wind erosion was 25% , 54%, 35% and 54% higher in RCP2.6, RCP4.5, RCP6.0 and RCP8.5 scenario than that in the baseline scenario. In the baseline and future climate change scenarios, the monthly, seasonal and annual emission rates of TSP, PM10 and PM2.5 caused by soil wind erosionin order of: sandy loam, sandy soil, sandy loam, clay loam, clay and sand soil. The results suggested that future climate change resulted in increased rate of wind erosion and dust emission in farmland in Hebei Province, but the rates were fluctuated in different months, seasons and climate change scenarios. |
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