This product is from the global data assimilation system gdas, which continuously collects observational data from the global telecommunications system gts, and other sources, for many analyses. The goal is to provide a reliable source of seasonal climate timescale ocean reanalysis to complement the atmospheric reanalyses available elsewhere noaaemc, nasagmao, and ecmwf, for example. Goal the goal of soda is to reconstruct the historical physical and eventually biogeochemical history of the ocean since the beginning of the 20th century. It is based on a version of the geos5 atmospheric data assimilation system that was frozen in 2008. It was introduced to replace the original merra dataset because of the advances made in the assimilation system that enable assimilation of modern hyperspectral radiance and microwave observations, along with gpsradio occultation datasets. Reanalysis 2 should be used by user affected by known errors in the nn reanalysis. Reanalysis1 reanalysis2 national climatic data center. Oceanic and airsea interface data from the umd simple ocean data assimilation reanalysis.
Merra data span the period 1979 through february 2016 and were produced on a 0. A reanalysis of ocean climate using simple ocean data. Note that the wind stresses were detrended before use due to inconsistencies with observed sea level pressure trends. Strengthening of the pacific equatorial undercurrent in the. Discussions of the recovery of observations to improve reanalyses is also a focus. The simple ocean data assimilation soda analysis is an oceanic reanalysis data set consisting of gridded state variables for the global ocean, as well as. 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. We analyzed the most recent version of the simple ocean data assimilation soda reanalysis version 2. The ncepncar reanalysis project at the noaaesrl physical sciences laboratory. While soda remains a universitybased research project, we want to be helpful.
This is a demonstration product from the hycom consortium and is provided as is. The second project is the ncepdoe reanalysis reanalysis 2 project, a global reanalysis of atmospheric data spanning 1979 to present. The goal of soda is to reconstruct the historical physical and. Below is a list of presentations by ncep scientists, all in power point format. The cfsr hourly hires 3d ocean data can be downloaded from ncei from jan 1979march 2011. As its name implies, the simple ocean data assimilation oceansea ice reanalysis soda. Yang and giese 20 to characterize and understand historical changes in euc strength. Greg the reanalysis has been remapped onto a uniform 12x12 mercator coordinate horizontal grid with 720x330 grid points, and with the first point at 74. The simple ocean data assimilation, or soda, analysis is an ocean reanalysis data set consisting of gridded variables for the global ocean, as well as several. Ncep global ocean data assimilation system godas at noaa. Notice to users who downloaded cfsr time series data prior to 22.
The national centers for environmental prediction ncep climate forecast system reanalysis cfsr was initially completed over the 31year period from 1979 to 2009 and has been extended to march 2011. These ncep fnl final operational global analysis data are on 1degree by 1degree grids prepared operationally every six hours. Ncepncar global reanalysis data archive information. Only daily and 6hourly data sets are referenced here, for a quarterspherical window covering eastern america and westcentral eurasia. Reanalysis 2 will provide more accurate picture of. Cglors data dissemination or cmems portal link contact. Evaluative content provided by reanalysis developers, observationalists, and users. Overview of current ocean reanalyses advancing reanalysis. The goal of soda is to reconstruct the historical physical and eventually biogeochemical history of the ocean. A large subset of this data is available from psl in its original 4 times daily format and as daily averages. As its name implies, the simple ocean data assimilation oceansea ice reanalysis soda uses a simple architecture based on community standard codes with resolution chosen to match.
A reanalysis dataset of the south china sea scientific data. The modernera retrospective analysis for research and applications, version 2 merra2 provides data beginning in 1980. If you acquire godas data products from psl, we ask that you acknowledge us in your use of the data. Reanalysis2 should be used by user affected by known errors in the nn reanalysis. Use of near surface temperature and snow cover over the n. The simple ocean data assimilation, or soda, analysis is an ocean reanalysis data set consisting of gridded variables for the global ocean, as well as several derived fields.
The first is the ncepncar reanalysis reanalysis 1, a global reanalysis of atmospheric data spanning 1948 to present. Grid variables which always also download all of the dimension variables. Hycom consortium does not warrant or suggest that this data is fit for any particular purpose. It was created in cooperation with the national center for atmospheric research ncar. The centre has one of the largest supercomputer facilities and meteorological data archives in the world. Carton and giese, 2008 come from a reanalysis of ocean climate variability that begins with a state forecast produced by the parallel. As an example of how this process works we can download one of the files that will be used later in the tutorial. The first is the ncepncar reanalysis reanalysis1, a global reanalysis of atmospheric data spanning 1948 to present. We have transitioned the data files from netcdf3 to netcdf4classic format on monday oct 20th, 2014. Temperature and salinity profiles from the from the en3 v2a xbt bias corrected database 19582009, including xbt, ctd, argo, mooring, and from realtime gts thereafter.
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. Soda version 3 represents a major change from the previous soda2. Arctic sea ice in the global eddypermitting ocean reanalysis orap5. Air resources laboratory global reanalysis data archive. The second project is the ncepdoe reanalysis reanalysis2 project, a global reanalysis of atmospheric data spanning 1979 to present. G indicates the horizontal grid on which the data is presented. Further, neither coaps nor hycom consortium guarantee availability, service updates or timely data delivery. The goal is to provide an improved estimate of ocean state from those based solely on observations or numerical simulations. Sst and seaice are from the era40 archive prior to november 1981, from the ncep oi v2 weekly product.
Ecmwf periodically 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. The godas is forced by the momentum flux, heat flux and fresh water flux from the ncep atmospheric reanalysis 2. These data should be considered preliminary and will be subject to change in new releases. Reanalysis is a scientific method for developing a comprehensive record of how weather and climate are changing over time. Using griddap to request data and graphs from gridded datasets griddap lets you request a data subset, graph, or map from a gridded dataset for example, sea surface temperature data from a satellite, via a specially formed url. Along track altimeter sea level anomalies and global trends from aviso. Citeseerx simple ocean data assimilation soda reanalysis. This version of soda and its predecessors carton and giese 2008 are data assimilation products.
Ncep fnl operational model global tropospheric analyses. In the assimilation, a model forecast produced by an ocean general circulation model with an average resolution of 0. Analysis of transients particularly case studies in s. Maryland in the 1990s in order to develop an ocean reanalysis. For more information on the soda product, see carton et al. Apr 10, 2017 the modernera retrospective analysis for research and applications merra dataset was released in 2009. Strengthening of the pacific equatorial undercurrent in. Sep 24, 2018 agmerra and agcfsr climate forcing datasets for agricultural modeling. It is worthy noting that soda aims at improving upper ocean reanalysis, likely because data below m is limited. The modernera retrospective analysis for research and applications merra dataset was released in 2009. 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. Reanalysis is very popular and is used for monitoring. Ncep has created selected time series products at hourly temporal resolution by combining either 1 the analysis and one through fivehour forecasts, or 2 the one through six.
They generally extend back from the present day to 1948, and cover the entire globe. This may be done by including text such as godas data provided by the noaaoaresrl psl, boulder, colorado, usa, from their web site at in any documents or publications using these data. Circulation analysis in the northwest indian ocean using. Multiple data sources are used in constructing the soda climate reanalysis dataset, which ingests a wide variety of observations including hydrographic profiles, ocean station data, moored temperature and salinity measurements, surface temperature and salinity observations from a variety of instruments, sea surface. Overview of current ocean reanalyses by steeven paul not verified dear steeven, from suru saha of ncep. We are both a research institute and a 247 operational service, producing global numerical weather predictions and other data for our member and cooperating states and the broader community. Soda was developed in the 1990s as a collaborative project between the department of atmospheric and oceanic science at the university of maryland and the department. Open the reanalysis menu and set the year and month. The ncepncar reanalysis 1 project is using a stateoftheart analysisforecast system to perform data assimilation using past data from 1948 to the present. Many ocean reanalysis projects have been carried out worldwide, such as soda 5,6 simple ocean data assimilation, ecco 7 estimating the. Simple ocean data assimilation soda reanalysis effort 2004. Please, make sure you are aware of mars request efficiency before retrieving any data. Overview the soda reanalysis project, which began in the mid1990s, is an ongoing effort to reconstruct historical ocean climate variability on space and timescales similar to those captured by the atmospheric reanalysis projects at ncep e.
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. The essence of this process, which provides consistent and convenient maps without gaps, is explained in this animation. North american regional reanalysis workshop on 11 january 2005, as part of the 85th ams annual meeting, the north american regional reanalysis workshop was held, with presentations from ncep scientists as well as narr users. Circulation analysis in the northwest indian ocean using argo.
Data structure, access university of maryland, college park. As its name implies, the simple ocean data assimilation oceansea ice reanalysis soda uses a simple architecture based on community standard codes with resolution chosen to match available data and the scales of motion that are resolvable. The fnls are made with the same model which ncep uses in the global. Ecmwf is the european centre for mediumrange weather forecasts. Ecmwf ocean reanalysis system 4 oras4, global, 19582017 data available. Please login before retrieving data from this dataserver. Our period of interest, the past six decades, follows that.
A second reanalysis experiment spans the period of quikscat scatterometry from 20002004. As its name implies, the simple ocean data assimilation oceansea ice reanalysis soda uses a. Citeseerx document details isaac councill, lee giles, pradeep teregowda. The simple ocean data assimilation soda analysis is an oceanic reanalysis data set consisting of gridded state variables for the global ocean, as well as several derived fields. The reanalysis data are available for numerous meteorological parameters, as 6hourly observations, and daily and monthly averages. Variable statistic level download file create plotsubset.
In addition to providing an ocean reanalysis counterpart to the atmospheric reanalyses for application to climate studies our goal has been to examine the requirements needed for such an effort. This paper describes the simple ocean data assimilation soda reanalysis of ocean climate variability. This paper describes the simple ocean data assimilation reanalysis of ocean climate variability. It appears to reproduce observations quite well see the. The sources of observational data assimilated vary by reanalysis product and even by version within families of reanalyses, but in no case are in situ ocean subsurface velocities. The model is forced by observed surface wind stresses from the coads data set from 1958 to 1992 and from ncep after 1992. As its name implies, the simple ocean data assimilation oceansea ice reanalysis soda uses a simple architecture based on community. Throughout this paper, we frequently refer to observed phenomena. Monthly data sets, and some alternative windows have been extracted, although they will be superceded by the new window. Ocean synthesis directory icdc universitat hamburg. 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. Generic information about the ncepncar reanalysis data files on this site. Simple ocean data assimilation ncar climate data guide. The reanalysis spans the 44year period from 19582001, which complements the european center for medium range weather forecasts era40 atmospheric reanalysis.
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