An inter-basin teleconnection from the North Atlantic to the subarctic North Pacific at multidecadal time scales

Gong, Zhanqiu; Sun, Cheng; Li, Jianping; Feng, Juan; Xie, Fei; Ding, Ruiqiang; Yang, Yun; Xue, Jiaqing

doi:10.1007/s00382-019-05031-5

Cited by 19 publications

(20 citation statements)

References 68 publications

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“…Meanwhile, the PDO/IPO might correlate to the total TC days but the correlation coefficient is relatively small. Such findings are consistent with the previous studies which indicated that the PDO plays a minor role in the decadal variations of WNP TC characteristics (i.e., frequency and intensity) and it can barely explain the regional-scale features of WNP climate variability (Zhang et al, 2013;Sun et al, 2017a;Gong et al, 2020). Another interesting thing is that the correlation coefficient between WNP TC average intensity and the AMO index reaches 0.86 (p < 0.05), further confirming the strong connection between them as is inferred from Figure 2.…”

Section: Western North Pacific Tropical Cyclone Average Intensity Andsupporting

confidence: 93%

“…The simulated regression pattern of WNP SST onto the AMO index is consistent with the observed one, and the regression coefficients are significant over the WNP region. Overall, the experiment does indicate the existence of warming responses of WNP SST to the AMO and the results are consistent with previous studies that explain the underlying mechanism of such phenomenon (Sun et al, 2017a;Gong et al, 2020;Wu et al, 2020). The warm AMO phase could induce anomalous surface high pressures over the northern and eastern Pacific which generate diverging flow toward the WNP, leading to anomalous convergence and low pressures there.…”

Section: Western North Pacific Tropical Cyclone Average Intensity Andsupporting

confidence: 91%

“…In addition, SST warming would increase the water vapor content and enhance the moist instability over the lower troposphere ( Figures 5D, 6D). As mentioned above, the WNP SST warming induced by the AMO through the inter-basin SST teleconnection (Sun et al, 2017a;Gong et al, 2020) can partially explain such correlation between WNP TC intensity and the AMO. Moreover, WNP SST warming also induces significant changes in the vertical stability of the atmospheric column that may regulate the development of TCs.…”

Section: Roles Of Large-scale Environmental Factorsmentioning

confidence: 85%

“…Meanwhile, inter-basin SST interactions at decadal time scales have received considerable attention in recent years as many studies have suggested a strong SST teleconnection from North Atlantic to Pacific McGregor et al, 2014;Lopez et al, 2016;Ruprich-Robert et al, 2017). Particularly, some previous studies based on both modeling and observational analysis have suggested that the multidecadal variations in the SST and atmospheric circulation aloft over the western tropical Pacific and North Pacific are significantly influenced by the AMO signal (Sun et al, 2017a;Gong et al, 2020). Zhang et al (2018) have linked the multidecadal variations of WNP TC genesis frequency since 1980 to the AMO, but the potential influence of AMO on the WNP TC intensity remains to be studied.…”

Section: Introductionmentioning

confidence: 99%

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The Footprint of Atlantic Multidecadal Oscillation on the Intensity of Tropical Cyclones Over the Western North Pacific

et al. 2020

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Sea surface temperature (SST) over the western North Pacific (WNP) exhibits strong decadal to multidecadal variability and in this region, warm waters fuel the tropical cyclones (TCs). Observational records show pronounced decadal variations in WNP TC metrics during 1950–2018. Statistical analysis of the various TC metrics suggests that the annual average intensity of WNP TCs is closely linked to the AMO (r = 0.86 at decadal timescales, p < 0.05). Observations and coupled atmosphere-ocean simulations show that the decadal WNP SST variations regarded as the primary driver of TC intensity, are remotely controlled by the AMO. Corresponding to the WNP SST warming, the local SLP gets lower and the tropospheric air becomes warmer and moister, enhancing atmospheric instability and the generation of convective available potential energy. These favorable changes in the background environment provide more “fuel” to the development of deep convection and intensify the WNP TCs. The footprints of AMO in WNP SST and atmospheric states through trans-basin interaction eventually exert a significant impact on the TC intensity over the WNP region.

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Section: Western North Pacific Tropical Cyclone Average Intensity Andsupporting

confidence: 93%

Section: Western North Pacific Tropical Cyclone Average Intensity Andsupporting

confidence: 91%

Section: Roles Of Large-scale Environmental Factorsmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Footprint of Atlantic Multidecadal Oscillation on the Intensity of Tropical Cyclones Over the Western North Pacific

et al. 2020

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“…It exerts a significant impact not only on the regions surrounding the North Atlantic, but also extends to the Eurasian continent and East Asia (Sutton and Hodson, 2005; Lu et al ., 2006; Sun et al ., 2017b; 2015c). Although the Pacific decadal oscillation is known as a large driver of climate variability over North Pacific and surrounding regions (Newman et al ., 2016), the AMV also plays an important part in the multidecadal variability in the Pacific and Indian oceans through atmospheric bridge and coupled oceanic–atmospheric bridge mechanisms (Zhang and Delworth, 2007; Sun et al ., 2015b; 2017a; 2017b; 2019; Li et al ., 2016; 2019; O'Reilly et al ., 2017; Gong et al ., 2019), leading to tight connections among the major ocean basins in the Tropics on multidecadal timescales.…”

Section: Introductionmentioning

confidence: 99%

Atlantic Meridional Overturning Circulation reconstructions and instrumentally observed multidecadal climate variability: A comparison of indicators

Sun

Zhang

et al. 2020

Intl Journal of Climatology

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The Atlantic Meridional Overturning Circulation (AMOC) has an important role in the Earth's climate system, but it remains unclear how the instrumentally observed multidecadal variability of the Earth's climate is related to the AMOC. We carried out a comprehensive evaluation of five representative indicators of the AMOC, including one atmospheric index based on the effect of accumulated atmospheric forcing on the AMOC and four oceanographic indices using surface and subsurface oceanographic variables in the North Atlantic Ocean. We compared reconstructions of the AMOC against measurement records and analysed the relationships with the multidecadal variability of the annual mean surface air temperature anomalies over the North Atlantic, Northern Hemisphere and South Atlantic. All the AMOC indicators show a weakening trend during the most recent decade, which is in good agreement with the RAPID measurement record of the AMOC. Besides, the atmospheric reconstruction shows the best agreement with the observed low-frequency variation in the AMOC since 2004. The multidecadal variability in hemispheric/ regional surface temperatures is closely related to all the AMOC reconstructions and opposite relationships are observed between the North Atlantic and South Atlantic oceans. The multidecadal surface air temperature anomalies associated with the variations in the AMOC are most pronounced for the atmospheric reconstruction index, which leads the variations in the surface air temperature by 4-5 years. Among the oceanographic indicators, the reconstructions using subsurface oceanographic variables performed best in terms of the relationship with the variations in the multidecadal surface air temperature.

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Pacific decadal oscillation remotely forced by the equatorial Pacific and the Atlantic Oceans

et al. 2020

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The Pacific Decadal Oscillation (PDO), the leading mode of Pacific decadal sea surface temperature variability, arises mainly from combinations of regional air-sea interaction within the North Pacific Ocean and remote forcing, such as from the tropical Pacific and the Atlantic. Because of such a combination of mechanisms, a question remains as to how much PDO variability originates from these regions. To better understand PDO variability, the equatorial Pacific and the Atlantic impacts on the PDO are examined using several 3-dimensional partial ocean data assimilation experiments conducted with two global climate models: the CESM1.0 and MIROC3.2m. In these partial assimilation experiments, the climate models are constrained by observed temperature and salinity anomalies, one solely in the Atlantic basin and the other solely in the equatorial Pacific basin, but are allowed to evolve freely in other regions. These experiments demonstrate that, in addition to the tropical Pacific's role in driving PDO variability, the Atlantic can affect PDO variability by modulating the tropical Pacific climate through two proposed processes. One is the equatorial pathway, in which tropical Atlantic sea surface temperature (SST) variability causes an El Niño-like SST response in the equatorial Pacific through the reorganization of the global Walker circulation. The other is the north tropical pathway, where low-frequency SST variability associated with the Atlantic Multidecadal Oscillation induces a Matsuno-Gill type atmospheric response in the tropical Atlantic-Pacific sectors north of the equator. These results provide a quantitative assessment suggesting that 12-29% of PDO variance originates from the Atlantic Ocean and 40-44% from the tropical Pacific. The remaining 27-48% of the variance is inferred to arise from other processes such as regional ocean-atmosphere interactions in the North Pacific and possibly teleconnections from the Indian Ocean.

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An inter-basin teleconnection from the North Atlantic to the subarctic North Pacific at multidecadal time scales

Cited by 19 publications

References 68 publications

The Footprint of Atlantic Multidecadal Oscillation on the Intensity of Tropical Cyclones Over the Western North Pacific

The Footprint of Atlantic Multidecadal Oscillation on the Intensity of Tropical Cyclones Over the Western North Pacific

Atlantic Meridional Overturning Circulation reconstructions and instrumentally observed multidecadal climate variability: A comparison of indicators

Pacific decadal oscillation remotely forced by the equatorial Pacific and the Atlantic Oceans

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