We have transitioned the data files from netCDF3 to netCDF4. As a result, the files are compressed instead of being packed with a scale and offset. As with any netCDF4 file, the user interface will perform the uncompression. We expect the files to be read faster, depending on the application you are using. Please let us know if you run into any issues.

20th Century Reanalysis


Jump to blog articles...

News Links

Sep 12, 2014
News articles relating to the publication: "Recent seasonal asymmetric changes in the NAO (a marked summer decline and increased winter variability) and associated changes in the AO and Greenland Blocking Index." Early access from the International Journal of Climatology.
Sep 4, 2014
Brisbane Times: Old ship records used to improve weather forecasts.
Sep 3rd, 2014
NPR: Old Ship Logs Reveal Adventure, Tragedy And Hints About Climate.
Aug 25, 2014
The AtlanticHow to Track Climate Change? Digitize a Century's Worth of Moldy Old Records
Aug 19th, 2014
ABC Southern Queensland: Inland scientists look to old sailors for climate research.
Jun 2th, 2014
Albuquerque, NM NWS Forecast office: 1941: Wettest Year in New Mexico History.
May 19th, 2014
Goodland, KS NWS Forecast office: Republican River Flood of May 30, 1935.
Apr 14th, 2014
Continental heat anomalies and the extreme melting of the Greenland ice surface in 2012 and 1889 (abstract: Journal of Geophysical Research.)
Apr 9th, 2014
Science Daily: Conventional theories about Titanic disaster put on ice: Risk of icebergs higher now than in 1912
Apr 2th, 2014
environmental research web: Melting sea ice off the hook for recent cold winters?
Mar 10th, 2014
HPCwire: Podcast: Powering the 20th Century Weather Reanalysis Project
Jan 7th, 2014
Wall Street Journal: Elsevier and IEDA Announce Winner of 2013 Data Rescue Competition for Earth Sciences
Jan 7th, 2014
EOS: Award Program Recognizes Efforts to Protect Geoscience Data
Sep 13th, 2013
Berkeley Lab: Rising Mercury No Illusion, Finds Novel Data Analysis.
Sep 9th, 2013
Science News: NERSC Calculations Provide Independent Confirmation of Global Land Warming Since 1901.
Jul 30th, 2013
AGU: Independent observations corroborate surface air temperature record.
Jun 11th, 2013
University of Southern Queensland News: Rum Stained Logs Could Hold Key To Dust Storms.
Apr 20th, 2013
Frontline: India's National Magazine: First independent confirmation of global land warming.
Apr 9th, 2013
NOAA Research News Releases: New study gives first independent confirmation of global land warming.
Apr 12th, 2013
Boulder Daily Camera: CU-Boulder-led study confirms warming, without thermometers.
Apr 10th, 2013
Scientific American:: New Method Proves-Again-Climate Change Is Real.
Mar 22th, 2013
The Globe and Mail: Predicting future climate change may lie in the past.
Feb 13th, 2013
WITN TV: Residents In The East Contributing To Weather Prediction. Cumulonimbus, a Canadian weather research company, is teaming up with meteorologists at the University of Washington to turn your smart phone and tablet in to a portable weather station....
Feb 5th, 2013
Weather Channel: Video: Ship Logs Document Climate Change.
Winter 2011/2
Illumination: U of Missouri online news: Ill wind, uncommon cold.
Oct 24, 2012
Launch of Old Weather Arctic Website: http://www.oldweather.org
Sep 13, 2012
The journal article World Meteorological Organization Assessment of the Purported World Record 58°C Temperature Extreme at El Azizia, Libya described at USA Today Story: Death Valley now the hottest spot in the world , the British Met office blog: Where's the hottest place on Earth? and Popular Mechanics: A Century Later, Death Valley Finally Sets a World Heat Record uses 20CR as part of the line of evidence.
Apr 7, 2012
NWS Amarillo Office, NOAA: The Panhandles' Only F5 Reconstructing the April 9, 1947 Higgins-Glazier Tornado
Feb 24, 2012
International Environmental Data Rescue Organization (IEDRO): Prevent Climate Change Research in US Dying from Lack of Financial Support
Feb 10, 2012
Scientific American: NOAA Halts Reconstruction of Past Climate
Jan 1, 2012
Scientific American: Volunteers Plug Holes in the Climate Record
Dec 1, 2011
Lucas Laursen, Journalist: Extreme Weather More Frequent in Northern Europe
Nov 10, 2011
Missourian: MU professor creates 3-D computer model to explain 1911 storm
Nov 9, 2011
International Environmental Data Rescue Organization (IEDRO): Recovering Weather Data from Arctic Expeditions
Oct 17, 2011
Wired Science:Transcending Time: Great Long-Term Datasets
Oct 11, 2011
GEO: Group on Earth Observations: How ACRE recovers historical weather data
Sep 28, 2011
Columbia Daily Tribune: PMU researchers examine 1911 day of wild weather.
Sep 15, 2011
Irish Weather Online: Project Seeks To Recreate The World's Past Climate
Sep 12, 2011
Geology Times: Recovering historical weather data
June 20, 2011
NERSC: NERSC Honored for HPC Innovations Excellence
May 23, 2011
Philidelphia Inquirer: Why has the weather gone cuckoo?
Feb 23, 2011
Washington Post: Global warming, extreme events and weird weather
Feb 23, 2011
Response: Letter to the Wall Street Journal Editor: Severe Weather Is Driven by Many Factors
Feb 22, 2011
Climate Central: When Weather and Climate Gets Cloudy
Feb 22, 2011
Weather Channel: Is the weather getting weirder or not?
Feb 10, 2011
Wall Street Journal: The Weather Isn't Getting Weirder
Response: Letter to the Wall Street Journal Editor: Severe Weather Is Driven by Many Factors
Feb 4, 2011
Climate Central: Old Weather is Shedding New Light on Climate
Feb 4, 2011
NYTimes Green Blog: Rescuing the Earth's Weather History.
Jan, 26 2011
Discovery News: An Atmospheric Time Machine.
Jan, 26 2011
Green Blorge: Researchers assemble climate data for the 20th Century Reanalysis Project.
Jan 24, 2011
EurekAlert: The 20th Century Reanalysis Project: A time machine for climate scientists.
Jan 3, 2011
KYGN Radio News: January 1886 Blizzards --125 years later
Jan 3, 2011
Baltimore Sun: Volunteers around world putting old weather data online
Nov 26, 2010
USA Today: Old ship logs fill in weather history of past 250 years
Nov 8, 2010
Science News: Mining the maritime past for clues to climate's future
Sep 30, 2010
Science Media Centre: 'Dirty Weather Diaries' Rescuing lost climate data from the past.
Aug 24, 2010
US Dept of Energy: War, Pandemics, and Climate: the 1918 El Niño.
May 14, 2010
ABC News: Weather records probed in climate study.
Feb 10, 2010
Climate Watch Magazine: Reconstructing Weather to Predict Climate
February 4, 2010
Discovery News: The big El Niño that nobody saw.
September 29, 2009
ASCR Newsletter: Reanalysis Project targets once-and-future weather.
Spring 2009
ESRL Newsletter: Reconstructing History: Understanding past weather events to improve climate forecasts.
April 1, 2009
AUSSMC: Weather Secrets of the past help predict the future.
March 25, 2009
NCCS: Modeling the Weather's Extreme Mood Swings.
September 2008
SciDAC Review: Bridging the Gap between Science and Weather.

Blog links

A blog link does not mean PSD endorses either the blog itself or a particular blog article. We provide the link as a courtesy.
Sep 9, 2014
Not a lot of people know thatNew Attempt To Claim More Extreme Weather Not Supported By Data.
May 20, 2014
NCAR's Climate Lab BookImproving the weather from 96 years ago
Apr 15, 2014
Cool Green ScienceCitizen Science Tuesday: oldWeather
Nov 12, 2013
National Weather Serice CRH The "White Hurricane" Storm of 1913:A Numerical Model Retrospective.
Sep 10, 2013
Thought Fragments: An independent confirmation of global land warming, not using temperatures from meteorological stations.
May 27, 2013
Summit County Citizens Voice: Global warming: What about the heat-island effect?
Apr 4, 2013
KGYN Radio news: NWS Dodge City: Revisiting the Spring Blizzard of 1938 -- 75 years later.
Apr 13, 2013
Skeptical Science: Are surface temperature records reliable? (advanced version) and intermediate version.
Apr 13, 2013
Watts Up With That: Global Warming Over Land Is Real: CU-Boulder, NOAA Study.
Apr 12, 2013
The Huffington Post (from Daily Camera): Global Warming Over Land Is Real: CU-Boulder, NOAA Study.
Apr 15, 2013
The Green Optimistic: NOAA Study Demonstrates Global Warming Over Land is Real.
Apr 8, 2013
Watts Up With That: A Preliminary Look at Compo et al (2013).
Apr 8, 2013
Skeptical Science: Land Surface Warming Confirmed Independently Without Land Station Data.
Apr 8, 2013
Ideas, Inventions And Innovations: Byrd Came Oh-So-Close, But Probably Didn't Reach North Pole
Dec 23, 2012
nationalcalamityeaster1913flood.blogspot'Our National Calamity': The Great Easter 1913 Flood
Oct 24, 2012
Outside MagazineHow long-dead Arctic explorers are helping to improve climate science
Oct 14, 2012
Way Too Much Weather: Ryan Hanrahan's Blog: Fujiwhara and Northeast Hurricanes
Mar 3, 2012
Old Weather Blog: Analysis of the oldWeather data
Nov 11, 2011
IEDRO: Recovering Weather Data from Arctic Expeditions
Jul 6, 2011
Old Weather Blog: New Zealand gets its money's worth.
Feb 23, 2011
Climate Central: When Weather and Climate Gets Cloudy