Climate change
; Data mining
; Time series
; Atlantic multidecadal oscillations
; Climate classification/regimes
; Multidecadal variability
; Non-overlapping periods
; Northwestern United States
; Pacific decadal oscillation
; Pattern detection
; Ranking methods
; Time series analysis
; air temperature
; Atlantic Multidecadal Oscillation
; climate change
; climate classification
; data mining
; decadal variation
; Pacific Decadal Oscillation
; ranking
; time series
; United States
英文摘要:
The optimal ranking regime (ORR) method was used to identify intradecadal to multidecadal (IMD) time windows containing significant ranking sequences in U.S. climate division temperature data. The simplicity of the ORR procedure's output-a time series' most significant nonoverlapping periods of high or low rankings-makes it possible to graphically identify common temporal breakpoints and spatial patterns of IMD variability in the analyses of 102 climate division temperature series. This approach is also applied to annual Atlantic multidecadal oscillation (AMO) and Pacific decadal oscillation (PDO) climate indices, a Northern Hemisphere annual temperature (NHT) series, and divisional annual and seasonal temperature data during 1896-2012. In addition, Pearson correlations are calculated between PDO,AMO, and NHTseries and the divisional temperature series. Although PDO phase seems to be an important influence on spring temperatures in the northwestern United States, eastern temperature regimes in annual, winter, summer, and fall temperatures are more coincident with cool and warm phase AMO regimes. Annual AMO values also correlate significantly with summer temperatures along the Eastern Seaboard and fall temperatures in the U.S. Southwest. Given evidence of the abrupt onset of cold winter temperatures in the eastern United States during 1957/58, possible climate mechanisms associated with the cause and duration of the eastern U.S. warming hole period-identified here as a cool temperature regime occurring between the late 1950s and late 1980s-are discussed.
资助项目:
NOAA, National Oceanic and Atmospheric Administration
; USDA, National Oceanic and Atmospheric Administration
Plant Stress and Water Conservation Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Lubbock, TX, United States; Department of Meteorology and Climate Science, San José State University, San Jose, CA, United States
Recommended Citation:
Mauget S.A.,Cordero E.C.. Optimal ranking regime analysis of intra- to multidecadal U.S. climate variability. Part I: Temperature[J]. Journal of Climate,2014-01-01,27(24)