The agmerra and agcfsr climate forcing datasets were created as an element of the agricultural model intercomparison and improvement project agmip to provide consistent, daily time series over the 19802010 period with global coverage of climate variables required for agricultural models. Windographer data downloader free era5 and merra2 data. Trmm and merra precipitation anomalies in california trmm. Furthermore, using reanalysis data merra 2 for 19802018, the synoptic meteorological conditions for four seasons were obtained fig. The modernera retrospective analysis for research and applications, version 2 merra 2 is a reanalysis product from nasagmao. The narr model uses the very high resolution ncep eta model 32km45 layer together with the regional data assimilation system rdas which, significantly. Longterm, modelbased analyses of multiple datasets using a fixed assimilation system are a major focus in the gmao. Reanalysis definition is the act or an instance of analyzing something again.
Upgrade today to get your favorite music, movies, and podcasts. Bias correction of a novel european reanalysis data set for. Other sites may also have the data ncar, for example and those methods would be different than those below. Merra data are available at the modeling and assimilation data and information services center mdisc, managed by the nasa goddard earth sciences ges. The s0 atmospheric oscillations in 35year merra zonal wind and temperature dong l. Modern era reanalysis for research and applications merra funded nasa gmao effort surface input reanalysis for climate assessment sirca initial testing underway. May 27, 2018 the merra 2 reanalysis data was provided by the global modeling and assimilation office gmao at nasa goddard space flight center through the nasa ges disc online archive. Apr 10, 2017 the modernera retrospective analysis for research and applications merra dataset was released in 2009. Mac2 and rest2v5 clearsky irradiance models are integrated and examples provided. This page points you to information on the ncepncar reanalysis project and the implementation of a netcdfbased, internetaccessible, data service at noaaesrl psl for this set of data products. Summary of the main atmospheric reanalyses that are current or underway, with the horizontal resolution latitude. Details of the changes in parameterizations subsequent to the version in the original merra reanalysis are presented here. How to obtainplotanalyze data by anonymous not verified unfortunately, it is not straight forward to automate the download of erainterim and era40 fields.
These animations illustrate how different the observing system were in 1980 compared to today. The latest updates and issues for the page are available. In most cases, merra 2 better represents variability and trends in the global mean radiative fluxes over the period of analysis. Merra 2 motivation and objectives produce an ongoing, intermediate reanalysis for the satellite era using a recent version of geos5 to 1 address known limitations of merra c. Merra data span the period 1979 through february 2016 and were produced on a 0. The analysis period covers the 55 years from 1958, when regular radiosonde observation began on a global basis. Online visualization and value added services of merra2. The energy balance of the earth is controlled by the shortwave and longwave radiation emitted to space. The modernera retrospective analysis for research and. The first is the ncepncar reanalysis reanalysis 1, a global reanalysis of atmospheric data spanning 1948 to present. Satellite and reanalysis air quality data and services at nasa ges disc for public health study gh33b1251 agu 2018 fall meeting washington, d. Significant improvement in precipitation and water vapor climatology over older reanalyses. Using modern satellite trmm and reanalysis merra data, scientists reassess certain aspects of the precipitation climate in california.
The improvements include an updated model with better physical parameterizations, assorted data assimilation errors were fixed and additional data were included. The reanalysis data are available for numerous meteorological parameters, as 6hourly observations, and daily and monthly averages. Merra was used to drive standalone reanalyses of the land surface merraland and atmospheric aerosols merraero. Evolution of the meteorological observing system in. Satellite and reanalysis air quality data and services at. One thought on script to download nasamerra reanalysis in netcdf using wget qi october 17, 2015 at 8.
Merra 2 is the first longterm global reanalysis to assimilate spacebased observations of aerosols and represent their interactions with other physical processes in the climate system. These animations are one part of the project based on only trmm data. Ecmwfgeo workshop on atmospheric reanalysis, 1922 june 2006 27 merra and us reanalysis plans and activities michele rienecker1, phil arkin2, max suarez1, ricardo todling1 ron gelaro1, julio bacmeister1 siegfried schubert1, michael bosilovich1 1 global modeling and assimilation office, nasagsfc, greenbelt, md 20771. Reanalysis and observational datasets and variables. Presenting a python package for merra 2 download and clearsky irradiance modelling. The global radiative energy budget in merra and merra2. Ncep reanalysis r2 ncepdoe reanalysis ii r2 is an improved version of the ncepncar reanalysis i r1. Merra2 was designed to replace the original merra reanalysis 3, including recent advances in modeling and data assimilation for nearrealtime climate. Merra 2 data are available at mdisc, managed by the nasa goddard earth sciences ges data and information services center disc. The cfsr was designed and executed as a global, high resolution, coupled atmosphereoceanland surfacesea ice system to provide the best estimate of the state of these coupled domains over this period. Webbased reanalysis intercomparison tools writ allows users to quick analyze and intercompare multiple contemporary reanalyses data. Merra2 is also the first satelliteera global reanalysis to assimilate spacebased observations of aerosols and represent their interactions with other physical. The clearskypy python package is simple to use and makes clearsky modelling easy.
Please email us or post comments to the wiki page with any issues, suggestions or comments. December 1014 2018 reanalysis or assimilated model data data access services. For a full description of the project which sourced this data, you should visit the ncepncar cdas, reanalysis project home page. Script to download nasamerra reanalysis in netcdf using wget. Moreover, cosmorea6 as well as the postprocessed ghi data reveal an addedvalue when compared to global reanalysis erainterim and merra 2. The modernera retrospective analysis for research and applications merra is a stateoftheart reanalysis data product that provides, in addition to. The s0 atmospheric oscillations in 35year merra zonal wind. Reanalysis definition of reanalysis by merriamwebster. The modern era retrospectiveanalysis for research and applications merra was undertaken by nasas global modeling and assimilation office with two primary objectives. Merra 2 israeli atmospheric and climatic data center. Nasas modern era retrospectiveanalysis for research and application merra description. I search for a data center that provides hourly climatic data temperature, humidity, radiation for free, from all over the world.
Analyzing changes in the complexity of climate in the last. Gmao global modeling and assimilation office research site. If you cant install or update itunes for windows apple. Development of the geos5 atmospheric general circulation. Reanalysis national centers for environmental information. The modernera retrospective analysis for research and applications merra dataset was released in 2009. Pdf evaluation of the reanalysis products for the monsoon. The nasa center for climate simulation nccs has developed the reanalysis ensemble service res, a highperformance big data analytics framework built on apache hadoop, to allow researchers to leverage our compute power to analyze large datasets located at the nccs through a webbased interface, thereby eliminating the need to download the data. Produce an ongoing, intermediate reanalysis for the satellite era using a recent version of geos5 to 1 address known limitations of merra c. Hycom consortium does not warrant or suggest that this data is fit for any particular purpose. Joint center for earth systems technology, university of maryland, baltimore county, baltimore, md 3. Modernera retrospective analysis for research and applications merra merra data access.
The names of each reanlaysis are linked to individual pages in climate data guide that have further details, discussions of the strengths and limitations of the reanalysis, and links to download locations and other internet resources. Atmosphere free fulltext aerosol optical depth of the main. It currently supports the download of era5, merra and merra 2 data, and in the future it may incorporate additional data sources. Feb 01, 2019 merra 2 is the first longterm global reanalysis to assimilate spacebased observations of aerosols and represent their interactions with other physical processes in the climate system.
How to obtainplotanalyze data advancing reanalysis. Recent examples include narr, era40, merra, and the climate forecast system reanalysis cfsr we use in this work. The second project is the ncepdoe reanalysis reanalysis 2 project, a global reanalysis of atmospheric data spanning 1979 to present. Your music, tv shows, movies, podcasts, and audiobooks will transfer automatically to the apple music, apple tv, apple podcasts, and apple books apps where youll still have access to your favorite itunes features, including purchases, rentals, and imports. This work has been prepared under the project swe32018 and financially supported by ministry of science and higher education, poland. Merra 2 includes a representation of ice sheets over say greenland and antarctica. If you get itunes from the microsoft store, you shouldnt need to follow the rest of the steps in this article. Both color and opacity of each level are being driven by windspeed. The narr project is an extension of the ncep global reanalysis which is run over the north american region. Merra2 is also the first satelliteera global reanalysis to assimilate space based observations of aerosols and represent their interactions with other physical. Examples of how to use reanalysis in a sentence from the cambridge dictionary labs. Support for merra meteorology was removed from v1102d and. Where did this person download it and what is the exact name of the file you are looking at and the link to where you obtained it.
Reanalysis comparisons of upper troposphericlower stratospheric. Plot monthly maps or vertical crosssections from different reanalysis datasets as well as differences between reanalyses. If you have windows 10, you can get the latest version of itunes from the microsoft store. Merra was used to drive standalone reanalyses of the land surface merra land and atmospheric aerosols merraero. Submitted by kishorekumargrandhi on thu, 06022016 02. Merra2 motivation and objectives produce an ongoing, intermediate reanalysis for the satellite era using a recent version of geos5 to 1 address known limitations of merra c. Overall, the performance of merra 2 relative to merra is mixed. Reanalysis is a scientific method for developing a comprehensive record of how weather and climate are changing over time.
It covers 55 years, extending back to 1958, coinciding with the establishment of the global radiosonde observing system. We recommend that you use either geosfp, which is the current operational gmao met data product, or merra 2, which is the current gmao reanalysis product. The merra reanalysis product ceased in mid2015 and is now obsolete. Download itunes from apples website, then click download to download the itunes installer. The higher resolution reanalysis exhibits a significantly better performance of representing ghi variability, as well as biases, rmse and other conventional scores.
Narr is a regional reanalysis of north america containing temperatures, winds, moisture, soil data, and dozens of other parameters at 32 km horizontal resolution. It provides data continuous in time and space for 1980present day through the itegration of satellite based data and conventional weather observations into. Given its global spatial coverage, higher resolution, and improved data assimilation and processing, era5 has been a widely anticipated reanalysis. I do have automated routines for the conversion of era40 and erainterim to goat format but you need to download the nc files yourself. Reanalysis definition, the separating of any material or abstract entity into its constituent elements opposed to synthesis. Building on the success of the atmospheric reanalyses conducted with geos, current research and development activities are directed at producing a major earth system reanalysis, including atmosphere, land, ocean, and ice. Because of these problems with historical data, many wind power researchers have turned to reanalysis data, which interpolate meteorological observations in space and time using numerical weather prediction models. Merra 2 reanalysis data overview merra 2 the second modernera retrospective analysis for research and applications is a nasa reanalysis data set for the satellite era, focused on historical analyses of meteorology, atmospheric chemistry, land, ocean, and aerosol data with temporal scales ranging from weather to climate context. The upper level is rainbowcolored, the lower level is white. Merra 2 is a nasa atmospheric reanalysis integrating satellite data assimilation and aims at historical climate analyses. Unique to the approach is the explicit treatment of soil moisture impacts on et through relationships diagnosed from the reanalysis data. Reanalysis1 reanalysis2 reanalysis1 reanalysis2 are two global reanalyses of atmospheric data spanning 19481979 to the present at a 2. Meteorological data acquisition from merra2 reanalysis for. Merra land is a landonly offline replay of the merra land model component with two key changes from merra.
It is based on a version of the geos5 atmospheric data assimilation system that was frozen in 2008. Includes atmospheric mass, moisture and energy budget products from the cfsr reanalysis new. Jma carried out the second reanalysis project known as the japanese 55year reanalysis, or jra55 using a more sophisticated da system based on the operational system as of december 2009, and newly prepared dataset of past observations. The modernera retrospective analysis for research and applications, version 2 merra 2, is the latest atmospheric reanalysis of the modern satellite era produced by nasas global modeling and assimilation office gmao. Python package for merra 2 download, extraction and usage for clearsky irradiance modelling. This is a demonstration product from the hycom consortium and is provided as is.
Overview of current atmospheric reanalyses advancing. Incorporate modern satellite observation types not available to merra. What is the best data center to download world climatic data. Merra land precipitation forcing is based on merging a gaugebased data product from the noaa climate prediction center with merra precipitation. In it, observations and a numerical model that simulates one or more aspects of the earth system are combined objectively to generate a synthesized estimate of the state of the system. The modeling and assimilation in the geos5 system that performs the merra reanalysis runs at 72 terrain following eta. Studying diurnal variations of aerosols with nasa merra2. These measurements all provide critical inputs to the observing system used in merra 2. Preliminary results in merra 2 show a conservation in drymass evaporation for merra 2 is relatively more stable over time than with merra 1. The latest version of itunes now comes installed with macos mojave. The modernera retrospective analysis for research and applications, version 2 merra 2 is a global atmospheric reanalysis produced by the nasa global modeling and assimilation office gmao.
The animations visualize data from the merra reanalysis product, showing winds at both the 850 mb and 250 mb levels. Windographer data downloader this tool allows you to download longterm meteorological data for anywhere on the surface of the earth for free. Sep 24, 2018 agmerra and agcfsr climate forcing datasets for agricultural modeling. Compared to its predecessor, jra25, jra55 is based on a new data assimilation and prediction system da that improves many deficiencies found in the first japanese reanalysis. The modernera retrospective analysis for research and applications, version 2 merra 2, is nasas latest reanalysis for the satellite era 1980 onward using the goddard earth observing system, version 5 geos5, earth system model. Analysis erainterim and the climate forecast system.
One of the fundamental scientific goals of the gmao reanalysis projects is to provide the optimal estimate atmospheric state in a manner that is consistent over time. Evaluation of the reanalysis products for the monsoon season droughts in india article pdf available in journal of hydrometeorology march 2014 with 442 reads how we measure reads. I need to look at average 500 mb gph for a few months and do some correlation plots. The project illustrates the accumulated precipitation deficit maps for the california drought based on trmm and merra data 2012 2014. Is it possible to download merra 2 data as a single file for whole period for one pressure level and for one variable. By comparing merra with other updated reanalyses the interim version of the next ecmwf re.
The ncep climate forecast system reanalysis cfsr was completed over the 31year period of 1979 to 2009 in january 2010. Longterm aerosol optical depth trend over iran and. The results show that the north of iran is more humid than the other areas with a maximum humidity in autumn associated with air transport from the caspian sea. They generally extend back from the present day to 1948, and cover the entire globe. The global modeling and assimilation office gmao at nasa goddard space flight center uses the goddard earth observing system geos modeling and data assimilation system to prod.
Planned and potential reanalysis activities in the u. Merra2 is the first longterm global reanalysis to assimilate spacebased observations of aerosols and represent their interactions with other. Total precipitable water compared to gsstf is improved in merra 2 vs. Includes atmospheric mass, moisture and energy budget products from the ncepncar reanalysis r1. Merra 2 covers land surface diagnostics for the period 1980present at 0. Automated download of specific variables from merra 2 and rearrangement into months. This entry compiles a series of animations created for the use of wgbh in an educational webside. Initial validation and evaluation of the analyzed aod fields are provided using independent observations from ground, aircraft, and shipborne. It was created in cooperation with the national center for atmospheric research ncar.
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