Internal gravity waves(IGWs)are critical in driving Martian atmospheric motion and phenomena.This study investigates Martian IGWs by using high-resolution data from China’s Tianwen-1 mission and the National Aeronaut...Internal gravity waves(IGWs)are critical in driving Martian atmospheric motion and phenomena.This study investigates Martian IGWs by using high-resolution data from China’s Tianwen-1 mission and the National Aeronautics and Space Administration’s Mars Global Surveyor(MGS)by the radio occultation(RO)technique.Key IGW parameters,such as vertical and horizontal wavelengths,intrinsic frequency,and energy density,are extracted based on vertical temperature profiles from the Martian surface to~50 km altitude.Data reveal that the Martian IGWs are predominantly small-scale waves,with vertical wavelengths between 6 and 13 km and horizontal wavelengths extending to thousands of kilometers.These waves propagate almost vertically and exhibit low intrinsic frequencies close to the inertial frequency,with the characteristic of low-frequency inertial IGWs.Tianwen-1 data indicate stronger IGW activity,higher energy density,and less dissipation than MGS data in the northern hemisphere.Moreover,MGS data in the southern hemisphere show higher buoyancy frequencies and lower vertical wavelengths,suggesting more stable atmospheric conditions conducive to IGW propagation.These extracted IGW characteristics can enhance our understanding of the atmospheric dynamics on Mars and contribute valuable information for parameterization in global circulation models.展开更多
Education and Job Training is defined as informal education in the laws of the Republic of Indonesia concerning the National Educational System in Article 26 Point 3. Education and Job Training is carried out for indi...Education and Job Training is defined as informal education in the laws of the Republic of Indonesia concerning the National Educational System in Article 26 Point 3. Education and Job Training is carried out for individuals who require knowledge, work skills, life skills, and the correct attitudes for self-development, professional development, work, independent business and continued education. In the Indonesian construction industry, the Quantity Surveyor is a common role in planning and controlling consultant firms. These firms are organized as members of National Association of Indonesian Consultants. Many firms employ architects and technical staff as Quantity Surveyors, even if they only have experience in project calculations. This has given rise to the problem of inaccurate cost projections in the construction industry. Therefore, the future of Quantity Surveyors in Indonesia hinges on the implementation of education and short courses as means of raising the skill level of the profession. These steps will help to bridge the knowledge gap between local and foreign consultants.展开更多
Sun Surveyor(太阳测量师)是一款天文类软件,可用于Android和iOS系统,具有谷歌地图搜索、扩增实境、3D罗盘、通过星历表模式对太阳和月亮进行定位、对星体运动轨迹进行追踪等功能。高中地理'地球运动'部分的内容过于抽象,如果...Sun Surveyor(太阳测量师)是一款天文类软件,可用于Android和iOS系统,具有谷歌地图搜索、扩增实境、3D罗盘、通过星历表模式对太阳和月亮进行定位、对星体运动轨迹进行追踪等功能。高中地理'地球运动'部分的内容过于抽象,如果学生空间方位感、想象力不强,学习起来会很吃力。笔者发现,将Sun Surveyor应用于'地球运动'教学,可以轻松地突破教学难点。一、Sun展开更多
基金National Natural Science Foundation of China(Grant Nos.42174192,12241101,and 91952111).
文摘Internal gravity waves(IGWs)are critical in driving Martian atmospheric motion and phenomena.This study investigates Martian IGWs by using high-resolution data from China’s Tianwen-1 mission and the National Aeronautics and Space Administration’s Mars Global Surveyor(MGS)by the radio occultation(RO)technique.Key IGW parameters,such as vertical and horizontal wavelengths,intrinsic frequency,and energy density,are extracted based on vertical temperature profiles from the Martian surface to~50 km altitude.Data reveal that the Martian IGWs are predominantly small-scale waves,with vertical wavelengths between 6 and 13 km and horizontal wavelengths extending to thousands of kilometers.These waves propagate almost vertically and exhibit low intrinsic frequencies close to the inertial frequency,with the characteristic of low-frequency inertial IGWs.Tianwen-1 data indicate stronger IGW activity,higher energy density,and less dissipation than MGS data in the northern hemisphere.Moreover,MGS data in the southern hemisphere show higher buoyancy frequencies and lower vertical wavelengths,suggesting more stable atmospheric conditions conducive to IGW propagation.These extracted IGW characteristics can enhance our understanding of the atmospheric dynamics on Mars and contribute valuable information for parameterization in global circulation models.
文摘Education and Job Training is defined as informal education in the laws of the Republic of Indonesia concerning the National Educational System in Article 26 Point 3. Education and Job Training is carried out for individuals who require knowledge, work skills, life skills, and the correct attitudes for self-development, professional development, work, independent business and continued education. In the Indonesian construction industry, the Quantity Surveyor is a common role in planning and controlling consultant firms. These firms are organized as members of National Association of Indonesian Consultants. Many firms employ architects and technical staff as Quantity Surveyors, even if they only have experience in project calculations. This has given rise to the problem of inaccurate cost projections in the construction industry. Therefore, the future of Quantity Surveyors in Indonesia hinges on the implementation of education and short courses as means of raising the skill level of the profession. These steps will help to bridge the knowledge gap between local and foreign consultants.
