Supplementary description of differences between ana and asm data collections. Thanks for making a conversion program available for merra 2. Sign up instructions for downloading gmao merra data. Merra 2 file specification this document has a comprehensive list of datasets available, as well as description of the horizontal and vertical grids.
These gmao technical memoranda evaluate different aspects of the merra. It imports all common data formats, allows manual and automatic quality control, performs sophisticated statistical analyses, and allows the free download of merra data. You may also visit the nasa gesdisc channel for a quick look at giovanni features. I already have merra 2 data and do not need to run the wget script, however it is on a 180 to 180 grid as opposed to 0 to 360.
This directory contains the agmip climate forcing dataset based on the nasa modernera restrospective analysis for research and applications merra. Nasas modernera retrospective analysis for research. Post questions and find resources to convert meteorological data into a format hysplit can read. The components section describes the moving parts climate science is a big data. Specifically, the geosdas version 5 implements incremental analysis updates iau to slowly adjust the model states toward the observed state. So you can get straight to analyzing your data, rather than spending your time specifying details such as the time step or the date format. We have developed a converter to write the data in arl format for hysplit application. Focusing on the satellite era, from 1979 to the present, merra has achieved its. Perrla online lets you write your papers from anywhere with our webbased editor. To acquire the particular data from merra 2 reanalysis to be used in wind energy systems modeling, the significant time and knowledge is required to explore huge amount of data. The dataset originates from the global modeling and assimilation office of nasa goddard space flight center. The introduction illustrates the overall project and its goals. The modern era retrospectiveanalysis for research and applications merra was undertaken by nasas global modeling and assimilation office with two primary objectives. One thought on script to download nasa merra reanalysis in netcdf using wget qi october 17, 2015 at 8.
The modernera retrospective analysis for research and applications, version 2 merra 2 provides data beginning in 1980. Merra analytic service mas nasa climate data services. The merra2 dataset has all variables for running hysplit. The geos2wrf software has been used to process merra and merra2 files, as well as the daily geos5. It is based on a version of the geos5 atmospheric data assimilation system that was frozen in 2008. All software tools and languages have strengths and weaknesses. Time series for nasa merra wind speed and direction are. It is currently being produced with the gmaogeos5 data assimilation system version 5. Opendap is a software framework that allows access of scientific data over the internet. If the users data are organized differently from these datasets, then new utilities may need to be written to handle their data. Webbased reanalysis intercomparison tools writ allows users to quick analyze and intercompare multiple contemporary reanalyses data. Does any one have a script in r or python to pull merra data.
The merra motivation chapter summarizes why merra was targeted and the benefits it provides. Compare the best free open source data formats software at sourceforge. Script to download nasamerra reanalysis in netcdf using. Research using merra 2, identifying the presence and quantity of observations. They are providing daily files of a set of variables in the nc4 format.
Merra data, used by gtraj, is stored on a nasa server. Meteorological data acquisition from merra2 reanalysis. The modernera retrospective analysis for research and applications merra dataset was released in 2009. While the original merra data format was hdfeos, the merra2 supplied binary data. From the list, find type of data you are looking for. Note assimilation is term used for what many researchers know as analysis. It shows you the four nearest grid points on a map, letting you choose the one for which you wish to download data. The proposed data set will serve numerous user communities and purposes including. I search for a data center that provides hourly climatic data temperature, humidity, radiation for free, from all over the world. Flac is a free lossless compressed audio format which supports streaming and archival. Web site allows users to extract the merra data in a format. This gzipped tar file contains updated june 2016 source code for the geos2wrf and merra2wrf software, as well as a pdf copy of the nasa open source software agreement. The model was forced by merra and ocean chlorophyll data from seawifs was assimilated.
Merra cgd university corporation for atmospheric research. Contribute to tuwgeomerra development by creating an account on github. Time steps range from 1 min up to 1 month original data are hourly. Our data and maps are derived from simulations of historical atmospheric conditions performed by a numerical weather. Can i extract a single variable from merra2 data with ascii command. Merra2 is intended to replace the merra reanalysis product which was created with geos5. Windographer quickly imports data from almost any format and automatically determines the data structure. Merra 2 is a nasa atmospheric reanalysis integrating satellite data. Merra climate data for mepdg inputs enables users to download merra climate data in a format that is being used as an input for the aashtoware pavement me design software. Index ltpp climate tool, january 2017 fhwahrt17011. Time series for each 4 variables are available since 1 january 1979 up to 31 july 2014 35. Windographer data downloader free era5 and merra2 data. If you have access to the nccs computing facilities, the merra2 data files are available under. The version 2 of merra was introduced in 2016 to replace the original merra dataset because of the advances made in the assimilation system.
The package provides readers and converters for the land surface diagnostics within the modernera retrospective analysis for research and applications version 2 merra 2. Merra data is commonly available within windpro with a timelag of 12 months. Merra wind speed and direction dataset has 1 hour time step. It currently supports the download of era5, merra and merra2 data, and in the future it may incorporate additional data sources. Climate science is a big data domain that is experiencing unprecedented growth. Nasas climate data services are presented in this overview. Free open source data formats software sourceforge. Much of the structure of the data files remains the same in merra2. An itemization of all source files from each archive for each conventional data. The version 2 of merra was introduced in 2016 to replace the original merra. If you are new to this application, please see the help page for a guide on how to use giovanni. These programs are responsible for preparing geos5, merra, or merra2 data. Merra is a nasa reanalysis for the satellite era using a major new version of the goddard earth observing system data assimilation system version 5 geos5. This application allows you to visualize selected geophysical parameters.
The merra analysis are being conducted with the geos5 atmospheric data assimilation systemadas. Merra 2 data are available at mdisc, managed by the nasa goddard earth sciences ges data and information services center disc. Windographer is the industry leading software for the analysis of wind resource data measured by met tower, sodar, and lidar. It currently supports the download of era5, merra and merra 2 data, and in the future it may incorporate additional data. Merra2 data are available at mdisc, managed by the nasa goddard earth sciences ges data and information services center disc. Development of gridded innovations and observations. The download module implements a command line script for downloading merra2 reanalysis data from the. Please register with earthdata and login in order to gain full access to data. This is due to the processing time of the data at nasa and the subsetprocessing at emd. The geos2wrf software has been used to process merra files and the daily geos5.
In our efforts to address big data, were introducing merra analytic services mas, which enables mapreduce analytics over nasas modernera retrospective analysis for research and applications merra data. The ltpp climate tool offers users convenient access to climate data derived from the merra database in an intuitive and easytouse format. Submitted by kishorekumargrandhi on thu, 06022016 02. So, i am trying create a standalone program with netcdf4 python module to extract multiple point data. Merra data span the period 1979 through february 2016 and were produced on a 0. Basically the way it works is that local data can be made accessible to remote locations by using servers.
Climate data processing software ncar climate data guide. Is it possible to download merra 2 data as a single file for whole period for one pressure level and for one variable. The modernera retrospective analysis for research and applications, version 2 merra2 provides data beginning in. I do have automated routines for the conversion of era40 and erainterim to goat format. Windographer data downloader this tool allows you to download longterm meteorological data for anywhere on the surface of the earth for free. Agmip climate forcing datasets agmerra climate forcing dataset for agricultural modeling.
When the data have been processed at emd, then the following parameters are available from within the online data. How to obtainplotanalyze data by anonymous not verified unfortunately, it is not straight forward to automate the download of erainterim and era40 fields. How to obtainplotanalyze data advancing reanalysis. This feature allows users to download the hourly climatic database. Windographer quickly imports virtually every data format, allows rapid quality control and statistical analyses including mcp, and exports to all common wind flow models. What is the best software to use for climate data processing.
Additionally, merra data files are stored in netcdf format. The climate analysis section provides distilled derivatives of the hourly data files provided by direct ftp from nasa. It downloads a full 35year merra data set from windnavigator in about two minutes. Merra is an abbreviation for modern era retrospectiveanalysis for research and applications.