A high-resolution (10 km × 10 km) multiscale ocean modeling system was developed for short-term (1 - 2 weeks) ocean state hindcasting/forecasting in the Bay of Bengal (BOB) region. This paper is Part I of a two-p...A high-resolution (10 km × 10 km) multiscale ocean modeling system was developed for short-term (1 - 2 weeks) ocean state hindcasting/forecasting in the Bay of Bengal (BOB) region. This paper is Part I of a two-part series of studies. The Regional Ocean Modeling System (ROMS) was implemented and initialized with Levitus 1/4° climatological fields for short-term forecasting. The results from these climatology-based model simulations for three representative months (February, June and October) in three different seasons (winter, summer and autumn) are discussed herein. This high-resolution model implementation simulates most of the observed dominant circulation features. The multiscale features during February include an anticyclonic basin-scalegyre with a strong western boundary current (WBC) in the western basin, the formation of several shallow mesoscale eddies in the head of the Bay and a cyclonic sub-basin-scale Myanmar Gyre in the northeast. During June, no well-defined boundary current is simulated along the Indian coast;instead, alternating cyclonic and anticyclonic eddies appear along the east coast with cross-basin eastward flow to support a deep cyclonic Andaman Gyre. In October, a basin-scale cyclonic gyre with a continuous well-defined East India Coastal Current (EICC), weak inflow from the Malacca Strait to the Andaman Sea and advection of BOB water into the Arabian Sea via the Palk Strait are simulated well by the model. A number of mesoscale eddies appear on the eastern half of the basin during October. Physical pattern of simulated eddies and transports across selected sections are validated against available drifter climatology, ARGO data and previous observations. Application of this system to synoptic short-term predictions for October 2008 will be presented in Part II.展开更多
核子是构成宇宙可见物质的最主要成分,也是研究强相互作用的最佳实验室。对核子内部结构的研究是当前理论和实验研究的重要前沿。在核子内部结构的实验研究中,电子-离子对撞机(Electron Ion Collider,EIC)是最理想的装置,能提供核子内...核子是构成宇宙可见物质的最主要成分,也是研究强相互作用的最佳实验室。对核子内部结构的研究是当前理论和实验研究的重要前沿。在核子内部结构的实验研究中,电子-离子对撞机(Electron Ion Collider,EIC)是最理想的装置,能提供核子内部最清晰的图像,是人类认识物质世界深层次结构,特别是核子与原子核结构最理想的工具。中国极化电子离子对撞机EicC项目,设想在已开建的HIAF高能离子束的基础上进行升级:将离子束流升级成15~20GeV的极化束流,建设3~5GeV高能极化电子束流,实现质心系能量为10~20GeV双极化电子-离子对撞,在海夸克能区对核子内部结构进行精细测量,并对质子质量、奇特强子态等诸多重要物理课题展开研究。在本文中,我们开发了EicC快模拟软件,对探测器性能进行参数化模拟;通过物理模拟汇集EicC探测需求,利用探测器模拟软件进行优化并提出EicC探测器谱仪的初步设计方案。该谱仪方案提供了接近全立体角的覆盖范围和大动量范围内的粒子鉴别能力,兼顾EicC项目丰富的物理课题。展开更多
文摘A high-resolution (10 km × 10 km) multiscale ocean modeling system was developed for short-term (1 - 2 weeks) ocean state hindcasting/forecasting in the Bay of Bengal (BOB) region. This paper is Part I of a two-part series of studies. The Regional Ocean Modeling System (ROMS) was implemented and initialized with Levitus 1/4° climatological fields for short-term forecasting. The results from these climatology-based model simulations for three representative months (February, June and October) in three different seasons (winter, summer and autumn) are discussed herein. This high-resolution model implementation simulates most of the observed dominant circulation features. The multiscale features during February include an anticyclonic basin-scalegyre with a strong western boundary current (WBC) in the western basin, the formation of several shallow mesoscale eddies in the head of the Bay and a cyclonic sub-basin-scale Myanmar Gyre in the northeast. During June, no well-defined boundary current is simulated along the Indian coast;instead, alternating cyclonic and anticyclonic eddies appear along the east coast with cross-basin eastward flow to support a deep cyclonic Andaman Gyre. In October, a basin-scale cyclonic gyre with a continuous well-defined East India Coastal Current (EICC), weak inflow from the Malacca Strait to the Andaman Sea and advection of BOB water into the Arabian Sea via the Palk Strait are simulated well by the model. A number of mesoscale eddies appear on the eastern half of the basin during October. Physical pattern of simulated eddies and transports across selected sections are validated against available drifter climatology, ARGO data and previous observations. Application of this system to synoptic short-term predictions for October 2008 will be presented in Part II.
文摘核子是构成宇宙可见物质的最主要成分,也是研究强相互作用的最佳实验室。对核子内部结构的研究是当前理论和实验研究的重要前沿。在核子内部结构的实验研究中,电子-离子对撞机(Electron Ion Collider,EIC)是最理想的装置,能提供核子内部最清晰的图像,是人类认识物质世界深层次结构,特别是核子与原子核结构最理想的工具。中国极化电子离子对撞机EicC项目,设想在已开建的HIAF高能离子束的基础上进行升级:将离子束流升级成15~20GeV的极化束流,建设3~5GeV高能极化电子束流,实现质心系能量为10~20GeV双极化电子-离子对撞,在海夸克能区对核子内部结构进行精细测量,并对质子质量、奇特强子态等诸多重要物理课题展开研究。在本文中,我们开发了EicC快模拟软件,对探测器性能进行参数化模拟;通过物理模拟汇集EicC探测需求,利用探测器模拟软件进行优化并提出EicC探测器谱仪的初步设计方案。该谱仪方案提供了接近全立体角的覆盖范围和大动量范围内的粒子鉴别能力,兼顾EicC项目丰富的物理课题。
