Coupled patterns of spatiotemporal variability in Northern Hemisphere sea level pressure and conterminous U.S. Drought

Zhihua Zhang, Michael E. Mann

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We apply the multitaper frequency domain-singular value decomposition signal detection method to the investigation of coherent patterns of variation in seasonal Northern Hemisphere sea level pressure and conterminous U.S. summer drought during the period 1895-1995. The analysis identifies statistically significant patterns of spatiotemporal variability on interannual and bidecadal timescales indicative of both cold-season and warm-season atmospheric influences on North American drought patterns. The most robust signal found appears to be associated with the influences of the El Niño-Southern Oscillation (ENSO) on North American summer drought. Evidence is also found to support the existence of a roughly bidecadal drought signal tied to warm-season atmospheric circulation changes. The "Dust Bowl" conditions of the 1930s appear to result from a combination of these bidecadal influences on drought conditions that coincide with a decrease in the amplitude of interannual ENSO-related variability during the 1930s.

Original languageEnglish (US)
Pages (from-to)1-12
Number of pages12
JournalJournal of Geophysical Research D: Atmospheres
Volume110
Issue number3
DOIs
StatePublished - Feb 16 2005

Fingerprint

drought
Drought
Sea level
sea level pressure
Northern Hemisphere
sea level
Southern Oscillation
warm season
summer
oscillation
atmospheric circulation
cold season
signal detection
Signal detection
Singular value decomposition
detection method
dust
Dust
seasonal variation
decomposition

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

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abstract = "We apply the multitaper frequency domain-singular value decomposition signal detection method to the investigation of coherent patterns of variation in seasonal Northern Hemisphere sea level pressure and conterminous U.S. summer drought during the period 1895-1995. The analysis identifies statistically significant patterns of spatiotemporal variability on interannual and bidecadal timescales indicative of both cold-season and warm-season atmospheric influences on North American drought patterns. The most robust signal found appears to be associated with the influences of the El Ni{\~n}o-Southern Oscillation (ENSO) on North American summer drought. Evidence is also found to support the existence of a roughly bidecadal drought signal tied to warm-season atmospheric circulation changes. The {"}Dust Bowl{"} conditions of the 1930s appear to result from a combination of these bidecadal influences on drought conditions that coincide with a decrease in the amplitude of interannual ENSO-related variability during the 1930s.",
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