DOI: 10.1175/JCLI-D-13-00713.1
Scopus记录号: 2-s2.0-84909619839
论文题名: Different modes of variability over the Tasman Sea: Implications for regional climate
作者: Liess S. ; Kumar A. ; Snyder P.K. ; Kawale J. ; Steinhaeuser K. ; Semazzi F.H.M. ; Ganguly A.R. ; Samatova N.F. ; Kumar V.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 22 起始页码: 8466
结束页码: 8486
语种: 英语
Scopus关键词: Atmospheric pressure
; Atmospheric temperature
; Drought
; Orthogonal functions
; Surface properties
; Annular mode
; Australia
; ENSO
; Southern ocean
; Teleconnections
; Climatology
; air temperature
; drought
; El Nino-Southern Oscillation
; precipitation (climatology)
; regional climate
; seasonal variation
; teleconnection
; Australia
; New Zealand
; Pacific Ocean
; Southern Ocean
; Tasman Sea
英文摘要: A new approach is used to detect atmospheric teleconnections without being bound by orthogonality (such as empirical orthogonal functions). This method employs negative correlations in a global dataset to detect potential teleconnections. One teleconnection occurs between the Tasman Sea and the Southern Ocean. It is related to El Niño-Southern Oscillation (ENSO), the Indian Ocean dipole (IOD), and the southern annular mode (SAM). This teleconnection is significantly correlated with SAM during austral summer, fall, and winter, with IOD during spring, and with ENSO in summer. It can thus be described as a hybrid between these modes. Given previously found relationships between IOD and ENSO, and IOD's proximity to the teleconnection centers, correlations to IOD are generally stronger than to ENSO. Increasing pressure over the Tasman Sea leads to higher (lower) surface temperature over eastern Australia (the southwestern Pacific) in all seasons and is related to reduced surface temperature over Wilkes Land and Adélie Land in Antarctica during fall and winter. Precipitation responses are generally negative over New Zealand. For one standard deviation of the teleconnection index, precipitation anomalies are positive over Australia in fall, negative over southern Australia in winter and spring, and negative over eastern Australia in summer. When doubling the threshold, the size of the anomalous high-pressure center increases and annual precipitation anomalies are negative over southeastern Australia and northern New Zealand. Eliassen-Palm fluxes quantify the seasonal dependence of SAM, ENSO, and IOD influences. Analysis of the dynamical interactions between these teleconnection patterns can improve prediction of seasonal temperature and precipitation patterns in Australia and New Zealand. © 2014 American Meteorological Society. 资助项目: NASA, National Aeronautics and Space Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51226
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Soil, Water, and Climate, University of Minnesota, Twin Cities, St. Paul, MN, United States; Department of Computer Science and Engineering, University of Minnesota, Twin Cities, Minneapolis, MN, United States; Department of Marine Earth and Atmospheric Sciences, North Carolina State University, Raleigh, NC, United States; Department of Civil and Environmental Engineering, Northeastern University, Boston, MA, United States; Computer Science Department, North Carolina State University, Raleigh, NC, United States
Recommended Citation:
Liess S.,Kumar A.,Snyder P.K.,et al. Different modes of variability over the Tasman Sea: Implications for regional climate[J]. Journal of Climate,2014-01-01,27(22)