Sources of Uncertainty in the Tropical Pacific Warming Pattern under Global Warming Projected by Coupled Ocean-Atmosphere Models by Jun Ying

Author:Jun Ying
Language: eng
Format: epub, pdf
ISBN: 9789813298446
Publisher: Springer Singapore

The supposed mechanism can be further demonstrated by calculating the individual contribution of original CSFI deviation and TPSW deviation to the . The effect of CSFI deviation on can be represented by the positive CSFI deviation (which means the negative cloud radiation feedback in the central Pacific is weaker than that in MME) multiplying the MME TPSW pattern. Figure 3.7a shows a positive shortwave radiation on the equatorial central Pacific, spatially consistent with the pattern of positive CSFI deviation (Fig. 3.3b). The contribution of TPSW deviation on can be represented by the TPSW deviation multiplying by the MME CSFI. As shown, the positive TPSW deviation with the negative MME CSFI leads to some negative deviations in shortwave radiation (Fig. 3.7b), offsetting the positive shortwave radiations over the western Pacific originated from the positive CSFI deviation. Therefore, the positive deviations in shortwave radiation of the combination of these two effects are located on the central Pacific east of 180° (Fig. 3.7c), consisting with the regression pattern of in Fig. 3.5b. This result verifies that the supposed mechanism above is reasonable. In addition, it should be noted that the in Fig. 3.7c is a little smaller than the regressed in Fig. 3.5b, possibly because of the nonlinear process of the cloud radiation feedback in models.

Fig. 3.7a The effect of the CSFI deviation shown in Fig. 3.2b with the MME of TPSW. b The effect of SST deviation shown in Fig. 3.2a with the MME of CSFI. c The sum of (a) and (b) (Reprinted from [31] with permission of American Meteological Society)

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