Numerical Atmospheric dispersion Modeling Environment - an operational particle dispersion model using the Met Office Unified Model and ECMWF Numerical Weather Prediction meteorology data - SIPEX II data

This record contains a collection of maps of integrated particle density at different altitudes. These images were produced from the gridded dataset described in the metadata record with the ID "SIPEX_II_NAME_Gridded". See the provided URL.

The UK Met Office's Numerical Atmospheric-dispersion Modelling Environment (NAME) is used to model a wide range of atmospheric dispersion events.

These data were collected during the SIPEX II voyage of the Aurora Australis, 2012.

The use of NAME and the NWP met data was provided by the UK Met Office for free for research purposes. The analysed wind fields used for the running of NAME are calculated using the Met Office's Unified Model (UM). These are calculated by incorporating all observational site data at six hourly intervals into a forecasting system +/- 3 hours of the observation time. This is continuously repeated to produce a 3D analysis of the state of the atmosphere defined by meteorological variables. It is these variables that are incorporated into NAME and are used to calculate wind vectors, particle position, etc. The global resolution for these fields is 25 km.

Model Descriptor
Inert particles released for two hours each day between 01:00 - 03:00. The lat/lon for the ship was taken at 02:00 every day. The particles were tracked backwards in time for ten days. The NAME output grid comprised of 267 by 165 boxes of 0.5652 degrees longitude and 0.375 degrees latitude. The lat/lon minimum was 60.0,-85.0 and the max was 210,-23. The plots show the daily particle densities in g s m-3 per grid box for the whole of the back run. There are four different types of plots showing surface influence (0-100m), whole troposphere influence (0-16000m) and below the avg boundary layer (BL). The BL heights have also been plotted at the time of release for each of the backruns.

本数据集收录了不同海拔高度下的集成粒子密度分布图集。这些图像源自元数据记录中ID为"SIPEX_II_NAME_Gridded"的网格化数据集，具体可参见提供的链接。

英国气象局（UK Met Office）的数值大气扩散模拟环境（Numerical Atmospheric-dispersion Modelling Environment，NAME）被用于模拟各类大气扩散事件。

本数据集采集于2012年“极光南极号”（Aurora Australis）执行的SIPEX II科考航行期间。

NAME模式及数值天气预报（Numerical Weather Prediction，NWP）气象数据由英国气象局免费提供，仅可用于科研用途。用于运行NAME模式的分析风场基于气象局统一模式（Unified Model，UM）计算得到：该模式将观测站点每6小时的观测数据同化至预报系统中，同化窗口覆盖观测时刻前后各3小时，并通过持续迭代生成由气象变量定义的大气状态三维分析场。这些气象变量将被代入NAME模式，用于计算风场矢量、粒子位置等参数。此类分析场的全球分辨率为25千米。

模式说明
每日01:00至03:00之间释放惰性粒子，单次释放时长为2小时。每日02:00记录科考船的经纬度坐标。粒子将被反向追踪10天。NAME模式的输出网格包含267×165个网格单元，每个单元的经度跨度为0.5652°，纬度跨度为0.375°。网格的经纬度范围最小值为60.0°经度、-85.0°纬度，最大值为210°经度、-23°纬度。本图集展示了整个反向模拟时段内，每个网格单元的日粒子密度（单位：g·s·m⁻³）。共包含四类可视化结果：地表影响层（0-100米）、整个对流层影响层（0-16000米）以及平均边界层（Boundary Layer，BL）以下区域的粒子密度；同时还绘制了每次反向模拟启动时刻的边界层高度。