Who is involved in the 20th Century Reanalysis project?
To expand the coverage of global gridded reanalyses, the 20th Century Reanalysis Project is an effort led by NOAA's Physical Sciences Laboratory (PSL) and CIRES at the University of Colorado, supported by the Department of Energy, to produce reanalysis datasets spanning the entire 20th century and much of the 19th century.See all results for this questionWhich is the most recent version of the reanalysis?The most recent version of this reanalysis, V3, provides 8-times daily estimates of global tropospheric variability across 75 km grids, spanning 1836 to 2015 (with an experimental extension from 1806 to 1835.) There are three previous versions of the reanalysis: V1, V2, and V2c.See all results for this questionWhat is the NOAA 20th Century Reanalysis project?Using a state-of-the-art data assimilation system and surface pressure observations, the NOAA-CIRES-DOE Twentieth Century Reanalysis (20CR) project has generated a four-dimensional global atmospheric dataset of weather spanning 1836 to 2015 to place current atmospheric circulation patterns into a historical perspective.See all results for this question
Using the Twentieth Century Reanalysis to assess climate 20cr advancing reanalysis Rolling
Sep 05, 2015 · Sep 05, 2015 · We characterise the long-term variability of European near-surface wind speeds using 142 years of data from the Twentieth Century Reanalysis (20CR), and consider the potential of such long-baseline climate data sets for wind energy applications. The low resolution of the 20CR would severely restrict its use on its own for wind farm site-screening. We therefore perform a The NOAA Climate Reanalysis Task Force: Activities and 20cr advancing reanalysis Rolling1. NOAA Climate Reanalysis Task Force is researching reanalysis improvements and outstanding issues. Two examples: stratospheric ozone and Pacific Walker circulation. 2. Gas phase stratospheric ozone parameterization used in NCEP GFS, 20CR, and CFSR can be improved to be time-aware (e.g., before CFCs) and account for additional chemistry. 3.Strengthening western equatorial Pacific and Maritime 20cr advancing reanalysis RollingSep 30, 2020 · The monthly NOAA 20th Century Reanalysis (20CR) (Compo et al., 2006), a fourdimensional global atmospheric data set approximately on 1.875°×1.875° resolution, generated from a stateoftheart data assimilation system, is used
Reanalysis Datasets at PSL: NOAA Physical Sciences Laboratory
Reanalysis Datasets at PSL. PSL maintains a collection of reanalysis datasets for use in climate diagnostics and attribution. Reanalysis datasets are created by assimilating ("inputting") climate observations using the same climate model throughout the entire reanalysis period in order to reduce the affects of modeling changes on climate statistics.NOAA Technical Report OAR CPO-4 Report from the Climate Reanalysis Task Force Technical Workshop. doi: 10.7289/V53J39ZZ. 2. 3. 20cr advancing reanalysis Rolling It is focused on advancing reanalysis towards monitoring and understanding of climate variability as 20cr advancing reanalysis Rolling Century Reanalysis; 20CR), to assimilation of only conventional upper-air observations, to assimilation 20cr advancing reanalysis RollingInterannual Variability in Reanalyses | Advancing ReanalysisOct 24, 2012 · Oct 24, 2012 · The intercomparison reveals a close agreement among almost all reanalysis datasets, except that the AAM computed from the 20 th Century Reanalysis (20CR) has a noticeably lower correlation with LOD and with the AAM from other datasets. This reduced correlation is related to the absence of coherent low-frequency variability, notably the Quasi 20cr advancing reanalysis Rolling
How does 20CR use ensemble filter data assimilation?
20CR uses an ensemble filter data assimilation method which directly estimates the most likely state of the global atmosphere for each three-hour period, and also estimates uncertainty in that analysis.See all results for this questionFrontiers | Ocean Reanalyses: Recent Advances and Unsolved 20cr advancing reanalysis RollingJul 31, 2019 · Jul 31, 2019 · Ocean and sea-ice reanalyses (ORAs, or ocean syntheses) are reconstructions of the ocean and sea-ice states using an ocean model integration constrained by atmospheric surface forcing, and ocean observations via a data assimilation method (e.g., Storto and Masina, 2016 ). Over the last decade, performance of ocean reanalyses has improved thanks 20cr advancing reanalysis RollingCERA20C: A Coupled Reanalysis of the Twentieth Century 20cr advancing reanalysis RollingApr 20, 2018 · Apr 20, 2018 · The reanalysis capabilities developed in the ERA-CLIM project have been extended to the ocean and sea-ice components in the ERA-CLIM2 project (Buizza et al., 2018). ORA-20C is an uncoupled ocean reanalysis, and reconstructs the ocean and sea-ice state over the twentieth century (de Boisseson et al., 2017). Temperature and salinity profiles are 20cr advancing reanalysis Rolling
20th Century Reanalysis: NOAA Physical Sciences Laboratory
About. Using a state-of-the-art data assimilation system and surface pressure observations, the NOAA-CIRES-DOE Twentieth Century Reanalysis (20CR) project has generated a four-dimensional global atmospheric dataset of weather spanning 1836 to 2015 to place current atmospheric circulation patterns into a historical perspective.. 20th Century Reanalysis and PSL20CR | Advancing ReanalysisDetails of 20CRv3 model, assimilation method, observations, etc. There are two subversions of the NOAA-CIRES-DOE Twentieth Century Reanalysis Version 3: 20CRv3si [4.5.1] and 20CRv3mo [4.5.2]. The only differences between these two versions are the prescribed sea surface temperatures and dates of availability: 20CRv3si will be available from 1836 (public) or 1806 (experimental) through 20cr advancing reanalysis Rolling(PDF) Advancing Global & Regional ReanalysesAt the Fifth International Conference on Reanalysis (Buizza et al., 2018), the session on observations discussed the needs for observations of reanalysis production and the processing required to 20cr advancing reanalysis Rolling