DOI: 10.1175/JCLI-D-11-00244.1
Scopus记录号: 2-s2.0-84862094389
论文题名: Effects of the PDO phase on the tropical belt width
作者: Grassi B. ; Redaelli G. ; Canziani P.O. ; Visconti G.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 9 起始页码: 3282
结束页码: 3290
语种: 英语
Scopus关键词: Atmosphere models
; Atmospheric model intercomparison projects
; European centre for medium-range weather forecasts
; General circulation model
; Model simulation
; Negative phase
; Pacific decadal oscillation
; Radiative forcings
; Reanalysis
; Sea surface temperature anomalies
; SST anomalies
; Stratospheric ozone depletion
; Tropical belt
; Tropical variabilty
; Atmospheric radiation
; Climate change
; Greenhouse gases
; Tropics
; Weather forecasting
; Computer simulation
; atmospheric modeling
; belt
; convection
; general circulation model
; Pacific Decadal Oscillation
; sea surface temperature
; temperature anomaly
; tropical environment
; weather forecasting
英文摘要: Recent studies have shown that the tropical belt (TB) has progressively expanded since at least the late 1970s. This trend has been largely attributed to the radiative forcing due to greenhouse gas (GHG) increase and stratospheric ozone depletion, even if an influence of sea surface temperature (SST) anomalies has been also suggested. The impact of the Pacific decadal oscillation (PDO) on the TB width is investigated in this work. The study is performed by using both Atmospheric Model Intercomparison Project (AMIP) and idealized simulations, produced by the NCARCommunity Atmosphere Model, version 3 (CAM3)GCMand reanalysis data [40-yr European Centre for Medium-Range Weather Forecasts (ECMWF) Re-Analysis (ERA-40), ERA-Interim, andModern-Era RetrospectiveAnalysis for Research andApplications (MERRA)]. Reanalyses show that a switch of the PDO from a positive to a negative phase can lead to a significant TB expansion during the equinoxes. This effect, indicating a possible PDO contribution to the widening that characterized the TB width during the last decades, is not correctly reproduced by model simulations. Deficiencies in the sensitivity of model-simulated convective processes to SST anomalies are suggested as a possible cause of the TB widening underestimation. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52417
Appears in Collections: 气候变化事实与影响
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作者单位: CETEMPS/Department of Physics, University of L'Aquila, Coppito-L'Aquila, Italy; PEPACG, Pontificia Universidad Cató lica Argentina, CONICET, Buenos Aires, Argentina
Recommended Citation:
Grassi B.,Redaelli G.,Canziani P.O.,et al. Effects of the PDO phase on the tropical belt width[J]. Journal of Climate,2012-01-01,25(9)