Assignment 1, Fall 2023: Difference between revisions

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==On the netcdf file==
==On the netcdf file==


Netcdf (Network Common Data Form) is a set of self-describing, machine-independent data formats that support the creation, access, and sharing of array-oriented scientific data. The project homepage is hosted by the [https://www.unidata.ucar.edu/software/netcdf Unidata program] at the University Corporation for Atmospheric Research (UCAR). They are also the chief source of netCDF software, standards development, updates etc.
Netcdf (Network Common Data Form) is a set of self-describing, machine-independent data formats that support the creation, access, and sharing of array-oriented scientific data. The project homepage is hosted by the [https://www.unidata.ucar.edu/software/netcdf Unidata program] at the University Corporation for Atmospheric Research (UCAR). They are also the chief source of netCDF software, standards development, updates etc.
[https://psl.noaa.gov/data/help/tools.html NOAA网站上介绍的读取Netcdf的几种方法]
[https://psl.noaa.gov/data/help/tools.html NOAA网站上介绍的读取Netcdf的几种方法。]


==Read .nc using Matlab==
==Read .nc using Matlab==

Latest revision as of 11:02, 4 October 2023

Question #1

请使用多年(>20年)的NCEP/NCAR月平均再分析资料,画出各季节(至少画出冬夏两季)纬向平均温度场、纬向平均纬向风场的高度-纬度剖面分布,并简述其分布特征和季节变化特征。

Question #2

请使用多年(>20年)的NCEP/NCAR月平均再分析资料,画出各季节(至少画出冬夏两季)温度场、纬向风场在各高度(850、500、100 hPa, 对于温度场请再画出1000hPa)上的水平分布,并简述其分布特征和季节变化特征。

Bonus Question

请使用多年(>20年)的月平均再分析资料(NCEP/NCAR),画出冬夏两季由平均环流和定常波引起的热量通量纬向平均后的高度-纬度剖面分布,并简述它们的分布特征。

On the netcdf file

Netcdf (Network Common Data Form) is a set of self-describing, machine-independent data formats that support the creation, access, and sharing of array-oriented scientific data. The project homepage is hosted by the Unidata program at the University Corporation for Atmospheric Research (UCAR). They are also the chief source of netCDF software, standards development, updates etc. NOAA网站上介绍的读取Netcdf的几种方法。

Read .nc using Matlab

Matlab 2008b 开始,Matlab 开始提供自带的读写.nc文件的函数。以下为读写.nc的一个样本matlab文件。对于图片,Matlab提供多种形式的存储。可在弹出图片的窗口左上方的下拉菜单中选择图片的存储方式,或者在命令行后用“print”命令存储图片(可以输入 help print 获得帮助)。关于Matlab的更多信息,可以去Matlab网站

下载区

本次作业所用的数据资料来自NCEP-DOE Reanalysis 2 的月平均资料,时间跨度为1979/1-2009/12。关于本资料的详细内容,请参见网站。 以下为完成本次作业所需的数据文件和matlab文件。

NCEP-DOE 月平均温度场资料 (1979/1-2009/12): nc file说明文件

NCEP-DOE 月平均纬向风(U)资料 (1979/1-2009/12): nc file说明文件

NCEP-land mask(用于在题目2中画出具体的海陆分布): nc文件

题目1和2计算分析用的Matlab 文件: 第一题m文件, 第二题m文件