This paper examines initial meso-scale vortex effects on the motion of a tropical cyclone （TC） in a system where coexisting two components of TC and meso-scale vortices with a barotropic vorticity equation model. Th...This paper examines initial meso-scale vortex effects on the motion of a tropical cyclone （TC） in a system where coexisting two components of TC and meso-scale vortices with a barotropic vorticity equation model. The initial mesoscale vortices are generated stochastically by employing Reinaud＇s method. The 62 simulations are performed and analysed in order to understand the statistical characteristics of the effects. Results show that the deflection of the TC track at t = 24 h induced by the initial meso-scale vortices ranges from 2 km to 37 km with the mean value of 13.4 km. A more significant deflection of the TC track can be reduced when several initial meso-scale vortices simultaneously appear in a smaller TC circulation area. It ranges from 22 km to 37 km with the mean value of 28 km, this fact implies that the initial meso-scale vortices-induced deflection may not be neglected sometimes.展开更多
Point bars are well developed on the Yellow River delta, an~ which theShengli I point bar is the most typical. The point bar, being about 4 km in length and several tensto more than 100 meters in width, is located on ...Point bars are well developed on the Yellow River delta, an~ which theShengli I point bar is the most typical. The point bar, being about 4 km in length and several tensto more than 100 meters in width, is located on the south side of the Shengli Bridge in KenliCounty, Dongying, Shandong. It is a typical fine-grained point bar with silt, which is predominant,some clay and minor plant debris and clay boulders. The Shengli I Point bar has complicated 3-Dstructures. Firstly, in a plane view, it comprises mainly eight sedimentary units, bar edge, baredge, bar platform, bar plain, bar channel, bar gully, bar pond and bar bay, developing side by sideand superimposed one by one m a complex way. Secondly, its vertical structures are very complex dueto the partial superimposition of the 8 sedimentary units. Besides hydatogenesis, very intensivewind erosion, eolian, ice and meltwater actions are also visible on the Shengli I point bar. Thecomplex form is made even more complicated because of the above co-actions.展开更多
Carbon dioxide(CO_(2))can be reduced to high-value fuels using the photocatalysis(PC)technique,which holds immense potential for tackling environmental issues and energy crises.The construction of metalfree photocatal...Carbon dioxide(CO_(2))can be reduced to high-value fuels using the photocatalysis(PC)technique,which holds immense potential for tackling environmental issues and energy crises.The construction of metalfree photocatalyst capable of utilizing infrared light to execute thermal-assisted photocatalysis(TPC)remains a challenge.In this study,reduced graphene oxide(RGO)with full-spectrum absorption was used as a thermal-assisted photocatalyst in CO_(2) reduction.It exhibited higher CO_(2) reduction efficiency under the visible and infrared irradiation than the sole visible irradiation.RGO-5(GO treated at 120℃ for 5 h)presented the highest defect density and C-OH/C-O-C content,leading to the best PC and TPC efficiencies.RGO was further engineered with HCl protonated g-C_(3)N_(4)(H-CN) to obtain two-dimensional heterojunction RGO/H-CN,which demonstrated the S-scheme charge transfer process.Owing to the synergistic effect of heterojunction and thermal assistance,RGO/H-CN exhibited better CO_(2) reduction efficiencies in both PC and TPC than RGO.The largest yields of CO and CH4 were achieved in 15%RGO/H-CN.This research provides new insights for applying RGO as thermal-assisted heterojunction photocatalyst for efficient CO_(2) reduction.展开更多
基金supported by the National Natural Science Foundation of China (Grant Nos. 40775038,40875031 and 40975036)the Science Foundation of Wuxi Environment Science and Technology Research Center
文摘This paper examines initial meso-scale vortex effects on the motion of a tropical cyclone （TC） in a system where coexisting two components of TC and meso-scale vortices with a barotropic vorticity equation model. The initial mesoscale vortices are generated stochastically by employing Reinaud＇s method. The 62 simulations are performed and analysed in order to understand the statistical characteristics of the effects. Results show that the deflection of the TC track at t = 24 h induced by the initial meso-scale vortices ranges from 2 km to 37 km with the mean value of 13.4 km. A more significant deflection of the TC track can be reduced when several initial meso-scale vortices simultaneously appear in a smaller TC circulation area. It ranges from 22 km to 37 km with the mean value of 28 km, this fact implies that the initial meso-scale vortices-induced deflection may not be neglected sometimes.
文摘Point bars are well developed on the Yellow River delta, an~ which theShengli I point bar is the most typical. The point bar, being about 4 km in length and several tensto more than 100 meters in width, is located on the south side of the Shengli Bridge in KenliCounty, Dongying, Shandong. It is a typical fine-grained point bar with silt, which is predominant,some clay and minor plant debris and clay boulders. The Shengli I Point bar has complicated 3-Dstructures. Firstly, in a plane view, it comprises mainly eight sedimentary units, bar edge, baredge, bar platform, bar plain, bar channel, bar gully, bar pond and bar bay, developing side by sideand superimposed one by one m a complex way. Secondly, its vertical structures are very complex dueto the partial superimposition of the 8 sedimentary units. Besides hydatogenesis, very intensivewind erosion, eolian, ice and meltwater actions are also visible on the Shengli I point bar. Thecomplex form is made even more complicated because of the above co-actions.
基金financial support provided by the National Natural Science Foundation of China(Nos.41961134034,42293324,and 21876003)the National Key Research and Development Program of China(No.2022YFC3701104)the Second Tibetan Plateau Scientific Expedition and Research(No.2019QZKK0607).
文摘Carbon dioxide(CO_(2))can be reduced to high-value fuels using the photocatalysis(PC)technique,which holds immense potential for tackling environmental issues and energy crises.The construction of metalfree photocatalyst capable of utilizing infrared light to execute thermal-assisted photocatalysis(TPC)remains a challenge.In this study,reduced graphene oxide(RGO)with full-spectrum absorption was used as a thermal-assisted photocatalyst in CO_(2) reduction.It exhibited higher CO_(2) reduction efficiency under the visible and infrared irradiation than the sole visible irradiation.RGO-5(GO treated at 120℃ for 5 h)presented the highest defect density and C-OH/C-O-C content,leading to the best PC and TPC efficiencies.RGO was further engineered with HCl protonated g-C_(3)N_(4)(H-CN) to obtain two-dimensional heterojunction RGO/H-CN,which demonstrated the S-scheme charge transfer process.Owing to the synergistic effect of heterojunction and thermal assistance,RGO/H-CN exhibited better CO_(2) reduction efficiencies in both PC and TPC than RGO.The largest yields of CO and CH4 were achieved in 15%RGO/H-CN.This research provides new insights for applying RGO as thermal-assisted heterojunction photocatalyst for efficient CO_(2) reduction.
