Hindcast/Forecast of ENSO Events Based upon the Redistribution of Observed and Model Heat Content in the Western Tropical Pacific, 1964–86

White, Warren B.; Pazan, Stephen E.; Inoue, Masamichi

doi:10.1175/1520-0485(1987)017<0264:hoeebu>2.0.co;2

Cited by 52 publications

(27 citation statements)

References 25 publications

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“…Wave trains (Kushnir and Wallace, 1989), which may be affected by terrestrial surface changes, are associated with changes in uppertropospheric zonal winds (Nigam and Lindzen, 1989;Branstator, 2002) and energy transport between the equator and the poles. Another type of teleconnection can result from changes in dominant dynamic modes of variability, several of which could interact with extra-tropical continental climate: the North Atlantic Oscillation (NAO) (Kutzbach, 1970;Rogers, 1981;Trenberth and Paolino, 1981), the Northern Annular Mode (NAM) (Thompson and Wallace, 1998), the El Nin˜o-Southern Oscillation (ENSO) (White and Pazan, 1987;Graham and White, 1988;Kawamura, 1994;Tourre and White, 1995), the Northern Pacific Oscillation (NPO) (Linkin and Nigam, 2008) and the Atlantic Multi-Decadal Oscillation (AMO) (Guan and Nigam, 2009). Changes in terrestrial surface properties or climate change may cause changes in the statistical properties of these modes (Corti et al, 1999;Timmermann, 1999;Chase et al, 2000;Bonfils and Santer, 2010).…”

Section: Introductionmentioning

confidence: 99%

Boreal lakes moderate seasonal and diurnal temperature variation and perturb atmospheric circulation: analyses in the Community Earth System Model 1 (CESM1)

Subin

Murphy

et al. 2012

Tellus A: Dynamic Meteorology and Oceanography

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A B S T R A C T We used a lake thermal physics model recently coupled into the Community Earth System Model 1 (CESM1) to study the effects of lake distribution in present and future climate. Under present climate, correcting the large underestimation of lake area in CESM1 (denoted CCSM4 in the configuration used here) caused 1 8C spring decreases and fall increases in surface air temperature throughout large areas of Canada and the US. Simulated summer surface diurnal air temperature range decreased by up to 4 8C, reducing CCSM4 biases. These changes were much larger than those resulting from prescribed lake disappearance in some present-day permafrost regions under doubled-CO 2 conditions. Correcting the underestimation of lake area in present climate caused widespread high-latitude summer cooling at 850 hPa. Significant remote changes included decreases in the strength of fall Southern Ocean westerlies. We found significantly different winter responses when separately analysing 45-yr subperiods, indicating that relatively long simulations are required to discern the impacts of surface changes on remote conditions. We also investigated the surface forcing of lakes using idealised aqua-planet experiments which showed that surface changes of 2 8C in the Northern Hemisphere extra-tropics could cause substantial changes in precipitation and winds in the tropics and Southern Hemisphere. Shifts in the Inter-Tropical Convergence Zone were opposite in sign to those predicted by some previous studies. Zonal mean circulation changes were consistent in character but much larger than those occurring in the lake distribution experiments, due to the larger magnitude and more uniform surface forcing in the idealised aqua-planet experiments.

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Section: Introductionmentioning

confidence: 99%

Boreal lakes moderate seasonal and diurnal temperature variation and perturb atmospheric circulation: analyses in the Community Earth System Model 1 (CESM1)

Subin

Murphy

et al. 2012

Tellus A: Dynamic Meteorology and Oceanography

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“…However, as shown by White et al (1987White et al ( , 1989, the ofd equatorial mode has a large amplitude and this work indicates that the mode may have a large amplitude without being important for the ENSO cycle.…”

Section: Conclusion and Discussionmentioning

confidence: 54%

Effects of the Meridional Extent of Mean Equatorial Upwelling on Atmosphere-Ocean Coupled Instabilities over an Unbounded Ocean

Wakata

Sarachik

1992

Journal of the Meteorological Society of Japan

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The large scale instabilities of a coupled atmosphere-ocean system on an unbounded equatorial beta plane are investigated by solving the eigenvalue problem. Special attention is paid to the effect of the basic state inhomogeneity due to the meridional extent of the mean equatorial Upwelling. It is found that if the upwelling region near the equator is meridionally wide, an eastward-propagating mode becomes unstable, while if it is narrow, the second symmetric Rossby mode becomes unstable.In the narrow case, when the atmosphere-ocean coupling is strong, both modes can be unstable. Seeming inconsistencies involving the characteristics of anomaly propagation in some previously published results of atmosphere-ocean coupled models of the ENSO phenomenon may arise from this sensitivity to the meridional width of the basic state upwelling.

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“…The Hilbert transform used in this construction is obtained directly by operating the real component with a convolution filter (27) where is the convolution filter with unit amplitude response and 90 phase shift. A simple filter that provides an adequate amplitude response and phase response is given by [33] as (28) where . As the filter (28) yields an exact Hilbert transform.…”

Section: Convolution-based Local Hilbert Transformmentioning

confidence: 99%

A refined Hilbert-Huang transform with applications to inter-area oscillation monitoring

Laila

Messina

Pal

2009

2009 IEEE Power &Amp; Energy Society General Meeting

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Abstract-This paper focuses on the refinement of standard Hilbert-Huang transform (HHT) technique to accurately characterize time varying, multicomponents interarea oscillations. Several improved masking techniques for empirical mode decomposition (EMD) and a local Hilbert transformer are proposed and a number of issues regarding their use and interpretation are identified. Simulated response data from a complex power system model are used to assess the efficacy of the proposed techniques for capturing the temporal evolution of critical system modes. It is shown that the combination of the proposed methods result in superior frequency and temporal resolution than other approaches for analyzing complicated nonstationary oscillations.

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Hindcast/Forecast of ENSO Events Based upon the Redistribution of Observed and Model Heat Content in the Western Tropical Pacific, 1964–86

Cited by 52 publications

References 25 publications

Boreal lakes moderate seasonal and diurnal temperature variation and perturb atmospheric circulation: analyses in the Community Earth System Model 1 (CESM1)

Boreal lakes moderate seasonal and diurnal temperature variation and perturb atmospheric circulation: analyses in the Community Earth System Model 1 (CESM1)

Effects of the Meridional Extent of Mean Equatorial Upwelling on Atmosphere-Ocean Coupled Instabilities over an Unbounded Ocean

A refined Hilbert-Huang transform with applications to inter-area oscillation monitoring

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