| DOI: | 10.1175/JCLI-D-12-00224.1
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| Scopus记录号: | 2-s2.0-84875841675
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| 论文题名: | The hadley circulation in reanalyses: Climatology, variability, and Change |
| 作者: | Nguyen H.; Evans A.; Lucas C.; Smith I.; Timbal B.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2013
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| 卷: | 26, 期:10 | | 起始页码: | 3357
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| 结束页码: | 3376
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| 语种: | 英语
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| Scopus关键词: | Annual cycle
; Average rate
; Extratropical
; Hadley cells
; Hadley circulation
; Minimum value
; Monthly time scale
; Atmospheric pressure
; Climatology
; autumn
; climate change
; climate variation
; El Nino-Southern Oscillation
; Hadley cell
; meridional circulation
; Southern Oscillation
; spring (season)
; summer
; winter
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| 英文摘要: | Analysis of the annual cycle of intensity, extent, and width of the Hadley circulation across a 31-yr period (1979-2009) from all existent reanalyses reveals a good agreement among the datasets. All datasets show that intensity is at a maximum in the winter hemisphere and at a minimum in the summer hemisphere. Maximum and minimum values of meridional extent are reached in the respective autumn and spring hemispheres. While considering the horizontal momentumbalance, where a weakening of the Hadley cell (HC) is expected in association with a widening, it is shown here that there is no direct relationship between intensity and extent on a monthly time scale. All reanalyses show an expansion in both hemispheres, most pronounced and statistically significant during summer and autumn at an average rate of expansion of 0.55° decade-1 in each hemisphere. In contrast, intensity trends are inconsistent among the datasets, although there is a tendency toward intensification, particularly in winter and spring. Correlations between the HC and tropical and extratropical large-scale modes of variability suggest interactions where the extent of the HC is influenced by El Nin{ogonek} o-Southern Oscillation (ENSO) and the annular modes. The cells tend to shrink (expand) during the warm (cold) phase of ENSO and during the low (high) phase of the annular modes. Intensity appears to be influenced only by ENSO and only during spring for the southern cell and during winter for the northern cell. © 2013 American Meteorological Society. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/51924
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Centre for Australian Weather and Climate Research, Bureau of Meteorology, Melbourne, Australia
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| Recommended Citation: | |
Nguyen H.,Evans A.,Lucas C.,et al. The hadley circulation in reanalyses: Climatology, variability, and Change[J]. Journal of Climate,2013-01-01,26(10)
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