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Title: Detecting inhomogeneities in the Twentieth Century Reanalysis over the central United States

Journal Article · · Journal of Geophysical Research
DOI:https://doi.org/10.1029/2011jd016988· OSTI ID:1564836
 [1];  [2]
  1. Univ. of Tokyo, Tokyo (Japan)
  2. Princeton Univ., Princeton, NJ (United States); Willis Research Network, London (United Kingdom)

The Twentieth Century Reanalysis (20CR), which spans the 138 year period from 1871 to 2008, was intended for a variety of climate applications, including long–term trend assessment. Because over land 20CR only assimilates surface pressure observations and their count increases by an order of magnitude over the course of the record, a key question is whether the 20CR is homogenous and hence suitable for detecting climate–related changes. We use three statistical methods (Pettitt and Bai–Perron tests and segmented regression) to detect abrupt shifts in multiple hydrometeorological variable mean and uncertainty fields over the central United States. For surface air temperature and precipitation, we use the Climate Research Unit (CRU) time series data set for comparison. We find that for warm–season months, there is a consensus change point among all variables between 1940 and 1950, which is not substantiated by the CRU record. While we cannot say with certainty that these shifts in the 20CR analysis fields are artificial, our statistical analyses, coupled with a visual inspection of the underlying assimilated observational count time series, strongly point to this conclusion. Furthermore, our recommendation is therefore for users to restrict climate trend applications over the central United States to the second half century of the 20CR record, after observational density has stabilized.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
OSTI ID:
1564836
Journal Information:
Journal of Geophysical Research, Vol. 117, Issue D5; ISSN 0148-0227
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 60 works
Citation information provided by
Web of Science

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Cited By (18)

Variability and wind forcing of ocean temperature and thermal fronts in the Slope Water region of the Northwest Atlantic: TEMPERATURE IN SLOPE WATER REGION journal September 2017
The influence of different El Niño types on the South American rainfall: THE INFLUENCE OF DIFFERENT EL NIÑO TYPES ON THE SOUTH AMERICAN RAINFALL
  • Andreoli, Rita Valéria; de Oliveira, Suzana Soares; Kayano, Mary Toshie
  • International Journal of Climatology, Vol. 37, Issue 3 https://doi.org/10.1002/joc.4783
journal May 2016
Skill of the two 20th century reanalyses in representing Antarctic near-surface air temperature journal July 2018
Towards a more reliable historical reanalysis: Improvements for version 3 of the Twentieth Century Reanalysis system
  • Slivinski, Laura C.; Compo, Gilbert P.; Whitaker, Jeffrey S.
  • Quarterly Journal of the Royal Meteorological Society, Vol. 145, Issue 724 https://doi.org/10.1002/qj.3598
journal August 2019
Twentieth-century atmospheric river activity along the west coasts of Europe and North America: algorithm formulation, reanalysis uncertainty and links to atmospheric circulation patterns journal April 2016
Exploring the ability of the Pettitt method for detecting change point by Monte Carlo simulation journal October 2013
The importance of prewhitening in change point analysis under persistence journal February 2015
Attributing runoff changes to climate variability and human activities: uncertainty analysis using four monthly water balance models journal May 2015
Using the Twentieth Century Reanalysis to assess climate variability for the European wind industry journal September 2015
Dynamic downscaling of the twentieth-century reanalysis over the southeastern United States journal November 2012
Consistency of simulated and observed regional changes in temperature, sea level pressure and precipitation journal February 2013
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Expansion of global drylands under a warming climate journal January 2013
Towards a more reliable historical reanalysis: Improvements for version 3 of the Twentieth Century Reanalysis system text January 2019
Homogeneity Analysis of the CM SAF Surface Solar Irradiance Dataset Derived from Geostationary Satellite Observations journal December 2013

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