DOI: 10.1175/JCLI-D-15-0125.1
Scopus记录号: 2-s2.0-84980392042
论文题名: Austral spring Southern Hemisphere circulation and temperature changes and links to the SPCZ
作者: Clem K.R. ; Renwick J.A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 18 起始页码: 7371
结束页码: 7384
语种: 英语
Scopus关键词: Mechanical waves
; Ocean currents
; Sea ice
; Surface properties
; Atmospheric circulation
; Outgoing longwave radiation
; Sea ice concentration
; South pacific convergence zones
; Southern hemisphere circulation
; Surface temperatures
; Temperature changes
; Western Antarctic Peninsula
; Atmospheric temperature
; atmospheric circulation
; atmospheric convection
; atmospheric pressure
; monsoon
; Rossby wave
; Southern Hemisphere
; surface temperature
; temperature anomaly
; wave propagation
; Antarctic Peninsula
; Antarctica
; West Antarctica
英文摘要: Significant austral spring trends have previously been observed in West Antarctica and Antarctic Peninsula temperatures and in atmospheric circulation across the southern Pacific and Atlantic. Here, physical mechanisms for the observed trends are investigated through analysis of monthly circulation and temperatures from the ERA-Interim dataset and outgoing longwave radiation (OLR) data. The negative pressure trend over the South Pacific during spring is strongest in September, while the positive pressure trend over the South Atlantic is strongest in October. Pressure trends in November are generally nonsignificant. The authors demonstrate that a significant September trend toward increased convection (reduced OLR) in the poleward portion of the South Pacific convergence zone (SPCZ) is statistically related to Rossby wave-like circulation changes across the southern oceans. The wave response is strongest over the South Pacific in September and propagates eastward to the South Atlantic in October. OLR-related changes are linearly congruent with around half of the observed total changes in circulation during September and October and are consistent with observed trends in South Pacific sea ice concentration and surface temperature over western West Antarctica and the western Antarctic Peninsula. These results suggest SPCZ variability in early spring, especially on the poleward side of the SPCZ, is an important contributor to circulation and surface temperature trends across the South Pacific/Atlantic and West Antarctica. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50359
Appears in Collections: 气候变化事实与影响
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作者单位: School of Geography, Environment and Earth Sciences, Victoria University of Wellington, Wellington, New Zealand
Recommended Citation:
Clem K.R.,Renwick J.A.. Austral spring Southern Hemisphere circulation and temperature changes and links to the SPCZ[J]. Journal of Climate,2015-01-01,28(18)