Ensemble Hindcast Experiments for the Flood Period over China in 1998 by Use of the CCSR/NIES Atmospheric General Circulation Model

Wang, Huijun; Matsuno, Taisuke; Kurihara, Yoshio

doi:10.2151/jmsj1965.78.4_357

Cited by 35 publications

(13 citation statements)

References 17 publications

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“…In addition, the sea surface temperature (SST) anomalies over the tropical and northern midlatitude oceans are also documented having close linkages with the EASM. For example, Wang et al (2000a) and Wang et al (2000b) demonstrated the impact of the tropical eastern Pacific SST on the EASM. Huang and Li (1988) as well as Li and Mu (2001) addressed that the tropical western Pacific and Indian Ocean play important roles in the variability of the EASM.…”

Section: Introductionmentioning

confidence: 99%

A possible mechanism for the co‐variability of the boreal spring Antarctic Oscillation and the Yangtze River valley summer rainfall

Sun

Wang

Yuan

2008

Intl Journal of Climatology

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A significant correlation between the boreal spring Antarctic Oscillation (AAO) and the Yangtze River valley summer rainfall (YRVSR) has been found in previous studies, although the mechanisms that might lead to such far-reaching teleconnection remain unresolved. In this study, one of possible mechanisms responsible for the co-variability of the boreal spring AAO and the YRVSR is proposed. It follows that the convection activity over the region of the Maritime Continent serves as a bridge linking the boreal spring AAO and the YRVSR. This physical process can be described schematically as follows: during the boreal spring, a positive-phase (negative-phase) AAO is concurrent with a strong (weak) convection activity over the region of the Maritime Continent via anomalous meridional circulations along the central South Pacific and two meridional teleconnection wave train patterns, with one over the southern Indian Ocean at the lower level and the other along the central South Pacific at the upper level. Thereafter, the anomalous convection propagates northward along the seasonal cycle, and then changes the western Pacific subtropical high in the following seasons, consequently impacting on the summer rainfall in the Yangtze River valley.

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Section: Introductionmentioning

confidence: 99%

A possible mechanism for the co‐variability of the boreal spring Antarctic Oscillation and the Yangtze River valley summer rainfall

Sun

Wang

Yuan

2008

Intl Journal of Climatology

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“…The T42L20 version, which has medium resolution, was used. This model contains comprehensive physical processes, and has a reasonably high degree of accuracy for modeling mean climate [11] . The model was integrated for 20 years in the climatological run, in which SST and sea ice data is that of the AMIP (Atmospheric Model Intercomparison Project) climatological monthly data.…”

Section: The Model and Numerical Experimental Designmentioning

confidence: 99%

“…Since the model climatology has been described elsewhere [11] , only the sea-level pressure prediction for the mean climate as presented in Fig.1 is shown. The model reasonably simulates the distribution and strength of the pressure systems, including the low pressure over Eurasia and the sub-tropical high-pressure system.…”

Section: Precipitationmentioning

confidence: 99%

Prediction Research on Anomalous Atmospheric General Circulation in 1998

Wang¹

2001

Chinese J of Geophysics

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[Abstract] Prediction of climate anomalies and the general atmospheric circulation for the summer of 1998 is studied by using a climate model developed in Japan. Quantitative verification of the accuracy of the prediction was made by applying correlation analysis. Results indicate that the predictive skill is relatively high. Both the SST anomalies and initial atmospheric anomalies in spring are important for causing anomalous rainfall over China and anomalous atmospheric circulation in the Northern Hemisphere during summer. Comparatively impacts of the initial atmospheric anomalies on summer circulation in the Southern Hemisphere is insignificant. The initial anomalous atmospheric circulation is responsible for about half of the total precipitation anomalies in South China.

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“…At the same time, many scientists [10][11][12][13][14][15] show that initial conditions are also very important to short-term climate prediction, especially in East Asia, initial conditions cannot be neglected if one aims for forecasting short-term climatic anomalies because of internal atmospheric chaos. So accurate initial conditions are necessary.…”

Section: Introductionmentioning

confidence: 99%

The effect of initial conditions on Atmospheric General Circulation Model

Guan

Lü

Zhou

2011

International Conference on Information Science and Technology

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Two numerical experiments of ensemble hindcasting for 17 years are performed here, initial conditions are NCEP-DOE Reanalysis 2 data (adopted in the real-time prediction )and that in the second are supplied by the system of three-dimensional variational assimilation (3D-VAR),and there are five-member ensembles in each experiment. The model is used here which is a grid-point Atmospheric General Circulation Model with 9 vertical levels and a resolution of 2 0 in latitudinal and 2.5 0 in longitudinal direction, developed by the Institute of Atmospheric Physics, the Chinese Academy of Sciences (IAP9L2x2. 5-AGCM). The technique of Correlation Analysis is applied. Comparison results show that (1) the difference of temporal anomaly coefficient is very small in the tropics under two different initial conditions, whereas it is large in middle and high latitudes, especially in East Asia (China) region, (2) temporal anomaly coefficient in the experiment 2 is bigger than that in the experiment 1 in most of China region, (3) spatial anomaly correlation of many variables has also different degree improvement by use of the initial conditions after data assimilation(in the experiment 2).That is to say, the results demonstrate quantitatively that the role of initial conditions on short-term climate prediction in East Asia is more important than in the global, what's more, the initial conditions after data assimilation are better than that in the real-time prediction to some extend. So, the effect of initial conditions on atmospheric general circulation model is not neglected.

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Ensemble Hindcast Experiments for the Flood Period over China in 1998 by Use of the CCSR/NIES Atmospheric General Circulation Model

Abstract: Sets of numerical hindcast experiments were carried out to study the excessive rain that happened over

Cited by 35 publications

References 17 publications

A possible mechanism for the co‐variability of the boreal spring Antarctic Oscillation and the Yangtze River valley summer rainfall

A possible mechanism for the co‐variability of the boreal spring Antarctic Oscillation and the Yangtze River valley summer rainfall

Prediction Research on Anomalous Atmospheric General Circulation in 1998

The effect of initial conditions on Atmospheric General Circulation Model

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