In view of the planning practices of Hexi Village,Chini Town,Huadu District,Guangzhou City,general situation of the village was introduced,"ecological, convenient,high-efficiency,sharable"were taken as princ...In view of the planning practices of Hexi Village,Chini Town,Huadu District,Guangzhou City,general situation of the village was introduced,"ecological, convenient,high-efficiency,sharable"were taken as principles for the village planning.The village planning was elaborated from 4 perspectives:coordination between town planning and village planning,comprehensive village planning,renovation of old village,construction planning of new village.The implementation projects were summarized to discuss village planning.And it was proposed that the village planning should use construction land intensively and demonstrate regional characteristics.展开更多
The Medium Resolution Spectral ImagerⅡ(MERSI-Ⅱ)is a core payload onboard the Fengyun-3D(FY-3D)satellite.It is designed for monitoring atmospheric and environmental conditions and is crucial for retrieving key parame...The Medium Resolution Spectral ImagerⅡ(MERSI-Ⅱ)is a core payload onboard the Fengyun-3D(FY-3D)satellite.It is designed for monitoring atmospheric and environmental conditions and is crucial for retrieving key parameters such as cloud and aerosol properties.This study aims to evaluate the cloud detection and cloud top height(CTH)retrieval accuracy of FY-3D/MERSI-Ⅱin polar regions(Arctic and Antarctic)against the CALIOP(Cloud-Aerosol Lidar with Orthogonal Polarization)cloud products.The results demonstrate that MERSI-Ⅱ-derived cloud coverages in the Arctic are 7.2%lower than CALIOP observations,while they are overestimated(underestimated)in Antarctic in summer(other seasons).Seasonal variations in cloud detection accuracy are notable,with Arctic accuracy reaching90.4%in summer but declining to 51.3%in winter.The detection accuracy is consistently lower in Antarctic than in Arctic,though MERSI-Ⅱshows significantly better detection capability over water surfaces than snow/ice-covered areas.For CTH retrievals,correlation coefficients between MERSI-Ⅱand CALIOP reach 0.70(Arctic)and 0.71(Antarctic),with systematic underestimations of-0.46 km(Arctic)and-1.52 km(Antarctic)on average.Larger deviations occur in multi-layer clouds and ice cloud conditions.Notably,MERSI-Ⅱtends to overestimate(underestimate)CTH for low-level(high-level)clouds and demonstrates superior retrieval accuracy for water clouds than ice clouds.These findings provide robust data support for satellite algorithm optimization and polar environment monitoring.展开更多
文摘In view of the planning practices of Hexi Village,Chini Town,Huadu District,Guangzhou City,general situation of the village was introduced,"ecological, convenient,high-efficiency,sharable"were taken as principles for the village planning.The village planning was elaborated from 4 perspectives:coordination between town planning and village planning,comprehensive village planning,renovation of old village,construction planning of new village.The implementation projects were summarized to discuss village planning.And it was proposed that the village planning should use construction land intensively and demonstrate regional characteristics.
基金Supported by the National Natural Science Foundation of China(U2342206)Nature Science Foundation of Anhui Province(2208085UQ01)+3 种基金Anhui Meteorological Detection Equipment Engineering Technology Research Center Open Project Fund(2023QXTC04)Pioneer Program for Fengyun Satellite Applications(FY-APP-ZX-2023.01)Open Project Fund of China Meteorological Administration(CMA)Basin Heavy Rainfall Key Laboratory(2023BHR-Y06)CMA Special Project for Innovation and Development(CXFZ2026J137)。
文摘The Medium Resolution Spectral ImagerⅡ(MERSI-Ⅱ)is a core payload onboard the Fengyun-3D(FY-3D)satellite.It is designed for monitoring atmospheric and environmental conditions and is crucial for retrieving key parameters such as cloud and aerosol properties.This study aims to evaluate the cloud detection and cloud top height(CTH)retrieval accuracy of FY-3D/MERSI-Ⅱin polar regions(Arctic and Antarctic)against the CALIOP(Cloud-Aerosol Lidar with Orthogonal Polarization)cloud products.The results demonstrate that MERSI-Ⅱ-derived cloud coverages in the Arctic are 7.2%lower than CALIOP observations,while they are overestimated(underestimated)in Antarctic in summer(other seasons).Seasonal variations in cloud detection accuracy are notable,with Arctic accuracy reaching90.4%in summer but declining to 51.3%in winter.The detection accuracy is consistently lower in Antarctic than in Arctic,though MERSI-Ⅱshows significantly better detection capability over water surfaces than snow/ice-covered areas.For CTH retrievals,correlation coefficients between MERSI-Ⅱand CALIOP reach 0.70(Arctic)and 0.71(Antarctic),with systematic underestimations of-0.46 km(Arctic)and-1.52 km(Antarctic)on average.Larger deviations occur in multi-layer clouds and ice cloud conditions.Notably,MERSI-Ⅱtends to overestimate(underestimate)CTH for low-level(high-level)clouds and demonstrates superior retrieval accuracy for water clouds than ice clouds.These findings provide robust data support for satellite algorithm optimization and polar environment monitoring.
