Flash droughtsuncharacteristically rapid dryings of the land systemare naturally associated with extreme precipitation deficits. Era5 atmospheric reanalysis ncar climate data guide. The global radiative energy budget in merra and merra2. The nasa climate reanalysis dataset from merra 2 and the land data assimilation system ldas datasets, distributed at goddard earth sciences data and information services center ges disc. 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.
Ecmwf uses its forecast models and data assimilation systems to reanalyse archived observations, creating global data sets describing the recent history of the atmosphere, land surface, and oceans. A global plot of reanalysis 1 mean relative humidity for the month of january 1948. Find the latest tracks, albums, and images from merra. It spans the satellite observing era from 1980 to the present. 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. The improvements include an updated model with better physical parameterizations, assorted data assimilation errors were fixed and additional data were included.
Merra data are available at the modeling and assimilation data and information services center mdisc, managed by the nasa goddard earth sciences ges data and information services center disc. It is based on a version of the geos5 atmospheric data assimilation system that was frozen in 2008. Ncep reanalysis r2 ncepdoe reanalysis ii r2 is an improved version of the ncepncar reanalysis i r1. I believe that the state of the art in reanalysis are, nowadays, the erainterim, nasamerr and ncepcfsr reanalysis. In most cases, merra 2 better represents variability and trends in the global mean radiative fluxes over the period of analysis. Evolution of the meteorological observing system in. Reanalysis and observational datasets and variables. The ncepncar reanalysis 1 project is using a stateoftheart analysisforecast system to perform data assimilation using past data from 1948 to the present. Produced by ecmwf, era5 presently extends back to 1979. Nasa gmao has released a new version of the merra dataset spanning 1980 to present. 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. Im trying to find some webbased reanalysis tools that i used to use. 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. Question about processing era interim file in matlab 4 days 21 hours ago.
Such precipitation deficits, however, do not tell the whole story, for land surface drying can be exacerbated by anomalously high evapotranspiration et rates driven by anomalously high temperatures e. Modernera retrospective analysis for research and applications, version 2. Era5, the successor to erainterim, provides global, hourly estimates of atmospheric variables, at a horizontal resolution of 31 km and 7 vertical levels from the surface to 0. We have transitioned the data files from netcdf3 to netcdf4classic format on monday oct 20th, 2014. Atmospheric reanalyses comparison table advancing reanalysis. Ecmwf has released their second reanalysis and first coupled of the 20th century. The modernera retrospective analysis for research and applications, version 2 merra 2, features several major advances from the original merra reanalysis, including the use, outside of high latitudes, of observationsbased precipitation data products to correct the precipitation falling on the land surface in the merra 2 system. 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 produced by the nasa gsfc global modeling and assimilation office gmao. Progress, challenges and opportunities, brief conference report, bull. Examples of reanalysis datasets include the ecmwf re analysis, the modernera retrospective analysis for research and applications, version 2 merra 2, and the ncepncar reanalysis n. The modernera retrospective analysis for research and applications merra dataset was released in 2009. This image was produced by downloading one file of reanalysis 1 data through nomads and visualizing with the grid analysis and display system grads.
Read 4 answers by scientists with 4 recommendations from their colleagues to the question asked by leelambar singh on jan 28, 2018. Evaluation of the reanalysis products from gsfc, ncep, and. The project focuses on historical analyses of the hydrological cycle on a broad range of weather and climate time. Jan, apr, jul, oct 2004 julyaugust 1987 jan, jul 2001 jul 2006 2 degree scout runs. Modern era reanalysis for research and applications merra funded nasa gmao effort surface input reanalysis for climate assessment sirca initial testing underway. I consulted your comparison table for the atmospheric reanalysis, but the publicly available dataset resolution presents datasets that are not freely available to. Hello cathy, values of 1 month ago so should we truncate at download nasa merra reanalysis in netcdf using wget qi october 17, 2015 at 8. Video introduction and tutorial to giovanni platform of nasa, for data usage from the merra 2 data set applied to air quality monitoring networks design. Alexander 20, tropical precipitation variability and convectively coupled equatorial waves on submonthly time scales in reanalyses and trmm, j. Try these pages for help 4 days 21 hours ago processing era interim file in matlab 4 days 21 hours ago.
However, the data from 19481957 is a little different, in the regular non. Nasa modern era reanalysis for research and applications version2 merra 2. The modern era retrospectiveanalysis for research and applications merra was undertaken by nasas global modeling and assimilation office with two primary objectives. Merra 2 includes a representation of ice sheets over say greenland and antarctica. Incorporate modern satellite observation types not available to merra. The narr model uses the very high resolution ncep eta model 32km45 layer together with the regional data assimilation system rdas which, significantly. Notably arid regions of the globe are marked in deep shades of blue. Windographer data downloader this tool allows you to download longterm meteorological data for anywhere on the surface of the earth for free. The ncepncar reanalysis project at the noaaesrl physical sciences laboratory.
Merra data span the period 1979 through february 2016 and were produced on a 0. The noaa cpo modeling, analysis, prediction, and projections mapp program hosted a webinar on the topic of evaluation of reanalysis products on september 2. A large subset of this data is available from psd in its original 4 times daily format and as daily averages. The narr project is an extension of the ncep global reanalysis which is run over the north american region. Windographer data downloader free era5 and merra2 data. Demonstrates the use of the data downloader module of windographer professional edition, which lets you download longterm hourly wind speed, temperature, and pressure data from the merra data set. Merra uses the current goddard earth observing system data assimilation system geos5 rienecker et al. Merra 2 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 produced by the nasa gsfc global modeling and assimilation office gmao. Modernera retrospective analysis for research and applications merra merra data access. Video tutorial merra 2 giovanni nasa data use applied. It currently supports the download of era5, merra and merra 2 data, and in the future it may incorporate additional data sources. Overall, the performance of merra 2 relative to merra is mixed. B these linked articles include published references, and the jra25 reanalysis conducted by. Noaa, cires, and doe have just released an improved version of the 20th century reanalysis, 3, spanning 18062015.
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