NECP最新资料下载

东风急流

最近在NECP官网上看到了一个0.25*0.25度的对流层分析和预报资料
NCEP GDAS/FNL 0.25 Degree Global Tropospheric Analyses and Forecast Grids
http://rda.ucar.edu/datasets/ds083.3/index.html#!description
下载的时候遇到如下问题，每个时次有四个资料，不知道选哪一个

好像是预报的时间不一样。我转模式可以用这个资料吗？选哪一个呢？这个资料所说的分析和再分析又有什么区别呢？

andrewsoong

没有说明文档么？我记得有啊

东风急流

andrewsoong 发表于 2016-1-6 10:40
没有说明文档么？我记得有啊

是这个么：
Abstract:       
These NCEP FNL (Final) operational global analysis and forecast data are on 0.25-degree by 0.25-degree grids prepared operationally every six hours. This product is from the Global Data Assimilation System (GDAS), which continuously collects observational data from the Global Telecommunications System (GTS), and other sources, for many analyses. The FNLs are made with the same model which NCEP uses in the Global Forecast System (GFS), but the FNLs are prepared about an hour or so after the GFS is initialized. The FNLs are delayed so that more observational data can be used. The GFS is run earlier in support of time critical forecast needs, and uses the FNL from the previous 6 hour cycle as part of its initialization.
The analyses are available on the surface, at 26 mandatory (and other pressure) levels from 1000 millibars to 10 millibars, in the surface boundary layer and at some sigma layers, the tropopause and a few others. Parameters include surface pressure, sea level pressure, geopotential height, temperature, sea surface temperature, soil values, ice cover, relative humidity, u- and v- winds, vertical motion, vorticity and ozone.

andrewsoong

东风急流 发表于 2016-1-6 11:00
是这个么：
Abstract:       
These NCEP FNL (Final) operational global analysis and forecast data are o ...

这是简介，还有一个详细的

东风急流

andrewsoong 发表于 2016-1-6 11:02
这是简介，还有一个详细的

有个document页面，看了下觉得应该下第一个，后面几个是预报的。不知道这个资料写的分析“analysis”，和再分析有什么区别?能用来转模式吗？

andrewsoong

东风急流 发表于 2016-1-6 11:11
有个document页面，看了下觉得应该下第一个，后面几个是预报的。不知道这个资料写的分析“analysis”，和 ...

分析场就是了。再分析时间序列长，他这个不够格吧？我也不懂

sun晒

file:///C:/Users/lenovo/Desktop/20160117114024.png

sun晒

突然发现自己竟然不会回复图片，哪个网页上有这么一句，
WRF Preprocessing System (WPS):        The GRIB-formatted data in this dataset can be used to initialize the Weather Research and Forecasting (WRF) Model.
Vtable | WRF website
下面那个Vtable是个链接，可以下载，我想应该是可以用到wrf模拟中

wangfei

这东西不错

东风急流

那你觉得应该下第几个呢？