Ensemble Kalman Fitting Paleo-Reanalysis Version 2 (EKF400_v2)

EKF400 version 2 is a monthly resolved paleo-reanalysis covering the period 1603 to 2003. Early instrumental temperature, surface pressure and precipitation (new in version 2) observations, temperature indices derived from historical documents and temperature and moisture sensitive tree-ring measurements (largely increased number in version 2) were assimilated into an atmospheric general circulation model ensemble using a Kalman filtering technique. This data set combines the advantage of traditional reconstruction methods of being as close as possible to observations with the advantage of climate models of being physically consistent and having 3-dimensional information about the global state of the atmosphere at 2x2 degree resolution for various variables and at all points in time.

While version 1 was using time-dependent covariances from the 30-member ensemble, version 2 uses a blended covariance matrix. It consists of 50% time-dependent and 50% climatological covariances. This leads to a better covariance estimation, not only between various locations in space but in between various variables, too.

 
Citation proposal
(2020) . Ensemble Kalman Fitting Paleo-Reanalysis Version 2 (EKF400_v2). https://gdk.gdi-de.org/geonetwork/srv/api/records/wdc-climate.de:3879249
 

Simple

Date ( Publication )
2020-07-28
Edition
1
Identifier
EKF400_v2.0
Identifier
doi:10.26050/WDCC/EKF400_v2.0

  Principal investigator

Contact instructions
Email: franke@giub.unibe.ch
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  Author

Contact instructions
Email: franke@giub.unibe.ch
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  Author

Contact instructions
Email: veronika.valler@giub.unibe.ch
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  Author

Contact instructions
Email: yuri.brugnara@gmail.com
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  Author

Contact instructions
Email: stefan.broennimann@giub.unibe.ch
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  Publisher

  Point of contact

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Name
NetCDF
Keywords
  • data assimilation
Keywords
  • tree ring proxy data
Use limitation
CC BY 4.0: Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/
Metadata language
eng; USA
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Supplemental Information

info:eu-repo/grantAgreement/EC/FP7/607029/BE//European Reanalysis of the Global Climate System (ERA-CLIM2)

info:eu-repo/grantAgreement/SNSF//162668/CH//Reconstructing Climate Using Ensemble Kalman Fitting (REUSE)

Distribution format
  • NetCDF ()

Transfer size
110330
OnLine resource
https://www.wdc-climate.de/ui/entry?acronym=EKF400_v2.0  
Hierarchy level
collection collection

Non quantitative attribute accuracy

Name of measure
n/a
Measure description
None

gmd:MD_Metadata

File identifier
wdc-climate.de:3879249   XML
Metadata language
eng; USA
Hierarchy level
collection collection
Hierarchy level name
EKF400_v2.0
Date stamp
2020-06-23T16:32:29
Metadata standard name
ISO 19115
Metadata standard version
ISO 19115-2:2009

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