Data Extraction

- NCDC NOMADS and NCMP: reanalysis (CFSR,NARR,R1,R2); NWP (NAM, GFS, RUC); GENS ensembles, SST
- NOAA/ESRL Search and Plot. (R1,R2,20CR, NARR)
- IRI (CFSR,20CR,R1,R2)
- ECMWF ERA-40
, ERA-Interim (Get netCDF or GRIB files from the daily or subdaily data) - ERA-20C
- Goddard Earth Science Model Data Information Sevices Center (MERRA)
- NCAR, Highest-resolution files for all reanalyses, except MERRA. GRIB parameter field extraction using cURL, and some conversion to netCDF as noted.
- JRA-25: Data Access > Web File Listing > Create Your Own File List (e.g. anl_p), use cURL or wget (for files).
- JRA-55 - same as JRA-25
- ERA-Interim -
*same as JRA-25*. - CFSR -
*same as JRA-25*(also subset with net CDF format conversion) - 20CR -
*same as JRA-25* - 20CRv2c

- MERRA Data Subsetter (variable list and what file to look at for a particular variable)
- openDAP servers: NOAA/ESRL (20CR,R1,R2,NARR), NCEP, MERRA2D, MERRA3D
- OpenDAP: MERRA Gridded Innovations and Observations (GIO)
- OpenGrADS.org: GrADS software with additional user functionality, including GUI for reanalyses including NCEP and MERRA
- Earth System Grid Federation (CFSR, MERRA, 20CR, JRA-25, ERA-Interim) Ana4MIPS: Easy access to netCDF reanalyses data of selected variables corresponding to the CMIP5 climate model output
- GOAT: Geophysical Observations Analysis Tool for Matlab

### Step-by-Step Guide to obtaining data files

Step by step descriptions of how to get the data at the reanalyses centers are available.

### Post Processing Routines and Algorithms

### Webtools to plot/analyze data by Function

### Basic Maps

- IRI (CFSR,20CR,R1,R2)
- ESRL/PSD Search and Plot (20CR,R1,R2,NARR)
- MERRA: Uses Giovanni to produce maps or animations of some monthly fields. Can average over successive times.
- NOMADS (CFSR,NARR,R1,R2)
- ECMWF ERA-40
, ERA-Interim (Plot maps) - MERRA Atlas
- Web-based Reanalysis Intercomparison Tool for maps makes user-selected reanalysis fields for monthly data. It can also difference two reanalyses or selected observational datasets with user-selected climatologies.
- The Climate Reanalyzer makes user-selected reanalysis fields and differences for monthly data.
- MeteoCentre provides pre-generated synoptic maps of SLP, 1000-500 thickness, and 500 hPa height (20CR and R1).
- GOAT: Geophysical Observations Analysis Tool for Matlab

### Other Basic Geographic Plots

- ESRL: Crossections
- Search and Plot
Merra: Uses Giovanni to produce hovmollers of some monthly fields. - KNMI.
- GOAT: Geophysical Observations Analysis Tool for Matlab

### Hovmollers

- ESRL/PSD: Hovmollers (R1)
- IRI
- GOAT: Geophysical Observations Analysis Tool for Matlab

**Advanced Plots**

- ESRL/PSD: Can plot monthly, daily and sub-daily of crossections from composite plotting pages (R1). Anomalies are available.
- ESRL/PSD: Hovmollers of means, anomalies of daily data. Anomalies are available (R1).
- GOAT: Temporal and spatial subsettting is supported via a GUI or built in function. Built-in calculation of anomalies and climatology. Superimpose or show the difference between two fields. Display land-cover or topography.

### Composite Maps (Average different, possibly non contiguous dates together)

- ESRL/PSD: Can plot composite maps and vertical crossectons from composite plotting pages on monthly, daily and sub-daily time scales for R1. Anomalies are available.
- ESRL/PSD: Can plot composite maps from plotting pages on monthly, daily and sub-daily timescales for 20CR. Anomalies are available. For monthly, plot composite maps of the 20CR ensemble spread (uncertainty).
- GCOS/WGSP: Can plot composite maps of sea level pressure from plotting pages on monthly timescales. Anomalies are available.
- WRIT maps: Can plot composite maps of a reanalysis or the difference of composites from two reanalyses.
GOAT: Can plot composites of non-contiguous dates.

### Correlation Maps

- ESRL/PSD: From monthly NCEP/NCAR R1
- KNMI
- The Climate Reanalyzer (ERA-Interim, NCEP/NCAR R1, NCEP/DOE R2, 20CR, observational datasets: PRISM precipitation, ERSSTv3b)

### Timeseries Plots

- NOMADS
- TDS
- NOAA/ESRL PSD: Plot simple timeseries of NCEP/NCAR R1 and 20thC Reanalysis monthly variables
- IRI
- Web-based Reanalysis Intercomparison Tool for timeseries (WRIT) makes user-selected reanalysis timeseries, scatter plots, cross-correlation functions, and probability density functions for monthly data. It can also difference two reanalyses or selected observational datasets.
The Climate Reanalyzer makes user-selected reanalysis time series with land/ocean masking.

### Timeseries Analysis

- KNMI: Plot, compute annual cycle, filter and other tools available for time series analysis. Provides many climate/ocean timeseries.
- ESRL/PSD: Correlate and do some other simple analysis on pregenerated or user supplied monthly timeseries
- ESRL/PSD: Extract daily timeseries from datasets. Can supply user criteria (e.g. top 10 temperatures in January for a point). R1,20CR
- ESRL/PSD: Extract monthly timeseries from datasets. R1,20CR
- IRI
- Web-based Reanalysis Intercomparison Tool for timeseries (WRIT) makes user-selected reanalysis timeseries, scatter plots, cross-correlation functions, and probability density functions for monthly data. It can also difference two reanalyses or selected observational datasets.

### Google Earth

### Miscellaneous

- ESRL/PSD Lead/Lag for Composites
- ESRL/PSD Lead/Lag for Correlations (maps)
- KNMI Smoothed fields, EOF, SVD and other analysis
- U. of Miami extreme event finder (20CR)
- WRIT Trajectory calculator (20CR, CFSR)

## Applications that read/plot/analyze netCDF and/or grib data (non-web)

A complete list is Unidata

- NCL
- GrADS
- IDV
- Ferret
- NCO netCDF Operators

Extract data from netCDF files, change attributes, combine files.... - CDO
- MATLAB
- IDL
- CDAT
- GOAT. A MATLAB based tool that integrates with NetCDF files and OPeNDAP sources.

### Re: How to obtain/plot/analyze data

This page needs more work. What do users find useful here?

### Re: How to obtain/plot/analyze data

### Re: How to obtain/plot/analyze data

Stefan,

Adding panoply is a great idea, but Reanalyses.org is a wiki site that depends on users. You can login and add it where you feel it is appropriate. If you have any questions, please feel free to ask or add a question to the Help section.

best wishes,

gil compo

### Re: How to obtain/plot/analyze data

### Re: How to obtain/plot/analyze data

### Re: ASCII timeseries of daily surface parameters from CFSR

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### How to read GFS SFC data files

### Re: How to read GFS SFC data files

### Re: How to read GFS SFC data files

### Re: How to read GFS SFC data files

### Re: How to read GFS SFC data files

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### Re: How to read GFS SFC data files

### Re: How to read GFS SFC data files

### Re: How to read GFS SFC data files

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### Problem with longitude in 20CR data

### Re: Problem with longitude in 20CR data

### Any hourly mean sea level pressure data

### Re: Any hourly mean sea level pressure data

### Re: How to obtain/plot/analyze data

### Re: How to obtain/plot/analyze data

### Re: How to obtain/plot/analyze data

Hi subramanyam , In order to help, anyone looking at this would need to have a link to the data you are trying to open. Grads and opengrads are similar in their capacity to open files. You may prefer to search the grads forum, then ask this question if it hasn't already been discussed. I did a quick google search and found:

http://gradsusr.org/pipermail/gradsusr/2012-December/033787.html

Good Luck

### Re: How to obtain/plot/analyze data

### Re: How to obtain/plot/analyze data

### add_offset and scale factor in ERA-I

### Re: add_offset and scale factor in ERA-I

### Re: add_offset and scale factor in ERA-I

### Re: add_offset and scale factor in ERA-I

### Re: add_offset and scale factor in ERA-I

### Re: How to read the SAGE II V7 file with Matlab

### Re: How to read the SAGE II V7 file with Matlab

### Re: How to read the SAGE II V7 file with Matlab

### Problems with incoming shortwave from ERA-I

### Re: Problems with incoming shortwave from ERA-I

### Re: Problems with incoming shortwave from ERA-I

### Re: Problems with incoming shortwave from ERA-I

Please ignore this question since I found my error. The error had to do with the way I was downloading the data, which was not including the entire day. Thanks anyways,

Sebastian

### 20CR - pr_wtr vs prate variables

I'd like to access from 20CR (ver 2c) daily rainfall for a specific lat/lon reference point. Is there a relationship between the daily pr_wtr output variable and the monthly mean prate variable? Is it valid to compare actual daily rainfall with data derived from pr_wtr?

### Re: 20CR - pr_wtr vs prate variables

### Re: Need to plot zonal means of meridinal winds-stream functions

### Re: Need to plot zonal means of meridinal winds-stream functions

### Hi, …

Hi,

Need to plot streamlines using ECMWF winds (U and V) over Asian region ...Can I have matlab code?

### Suggest a matlab users group

Dear Andy,

I suggest also trying a matlab user group for plotting tools specific to matlab.

best wishes,

### streamlines and matlab

While I don't think matlab has an email list, they do have extensive help pages. I searched and see

https://plot.ly/matlab/streamline-plots/

https://www.mathworks.com/help/matlab/ref/streamline.html

https://www.mathworks.com/help/matlab/ref/stream2.html

They also have libraries to read netCDF files.

Cathy S.

## Re: How to obtaindata