Two regimes of inter-basin interactions between the Atlantic and Pacific Oceans on interannual timescales

Park, Jae‐Heung; Yeh, Sang‐Wook; Kug, Jong‐Seong; Yang, Young‐Min; Jo, HyunBin; Kim, Hyo-Jeong; An, Soon‐Il

doi:10.1038/s41612-023-00332-3

Cited by 10 publications

(3 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This suggests that the relative contributions of the tropical Indian Ocean, Pacific, and Atlantic basins may be non-linear in nature. This may not be entirely surprising considering that the individual basins can have considerable influence on each other (Hoerling et al, 2001;Chikamoto et al, 2020;Hu & Fedorov, 2020;Park et al, 2023).…”

Section: Discussionmentioning

confidence: 99%

Inter-basin versus intra-basin sea surface temperature forcing of the Western North Pacific subtropical high’s westward extensions

Jones,

Chavas,

Johnson

2023

Preprint

View full text Add to dashboard Cite

Zonal extensions of the Western Pacific subtropical high (WPSH) strongly modulate extreme rainfall activity and tropical cyclone (TC) landfall over the Western North Pacific (WNP) region. On seasonal timescales, these zonal extensions are forced primarily by inter-basin zonal sea surface temperature (SST) gradients. However, despite the presence of large-scale zonal SST gradients, the WPSH’s response to SSTs varies from year to year. In this study, we force the atmosphere-only NCAR Community Earth System Model version 2 simulations with two real-world SST patterns, both featuring the large-scale zonal SST gradient characteristic of decaying El Niño/developing La Niña summers. For each of these patterns, we perform four experimental sets that test the relative contributions of the tropical Indian Ocean, Pacific, and Atlantic basin SSTs to simulated westward extensions over the WNP during June-August. Our results indicate that the subtle differences between the two SST anomaly patterns belie two different mechanisms forcing the WPSH’s westward extensions. In one SST pattern, the extratropical North Pacific SST forcing suppresses the tropical Pacific zonal SST gradient forcing, resulting in tropical Atlantic and Indian Ocean SST warming being the main drivers of the Walker Circulation. With an adjacent SST pattern, subsidence over the WNP is driven predominantly by intra-basin Pacific SST forcing. The results of this study have implications for understanding and predicting the impact of the WPSH’s zonal variability on tropical cyclones and extreme rainfall over the WNP.

show abstract

Section: Discussionmentioning

confidence: 99%

Inter-basin versus intra-basin sea surface temperature forcing of the Western North Pacific subtropical high’s westward extensions

Jones,

Chavas,

Johnson

2023

Preprint

View full text Add to dashboard Cite

show abstract

“…But the impact declined after 1980s. The impact from the North Tropical Atlantic on the El Niño-Southern Oscillation has become significant since mid-1980s (Park et al, 2023).…”

Section: Fossil Fuel and Increased Greenhouse Gas Emissionmentioning

confidence: 99%

Fossil Fuel, Greenhouse Gas and Global Warming

Liu,

Liu

2023

GJSFR

View full text Add to dashboard Cite

Since the Industrial Revolution, fossil fuel consumption and greenhouse gas emission have increased substantially, causing the rise of greenhouse gas concentration (GHGC) and in turn the rise of global mean surface temperature (GMST). We analyze the years of the rises and the falls of global temperature fluctuation, and find that the natural time interval between the rise and the fall of the temperature fluctuation has decreased from 31.5 years to 23 years, the impact from human activities has increased from 2.5 years to 9 years. We analyze the shares of total solar irradiance (TSI), greenhouse gas concentration (GHGC), and water vapor for the rise ofGMST, we find that: TSI accounts for 23.4% for greenhouse effect from 1880 to 1964, and 12.4% from 1965 to 2022; GHGC accounts for 80.9% for greenhouse effect from 1880 to 1964,and 86.6% from 1965 to 2022; water vapor is negatively related with GMST from 1880 to 1964, accounting for -4.3% for greenhouse effect, and positively related with GMST from 1965 to 2022, accounting for 1% for greenhouse effect. Global warming hiatus from 1998 to 2012 is a shortened fall of global temperature fluctuation.

show abstract

“…This result contrasts sharply with the Summer Atlantic Niño-ENSO relationship, which was found to be statistically insigni cant over the same period. Notably, over the same period, the ENSO connection is most prominent with the Winter Atlantic Niño, rather than other primary climate variability mode such as Northern Tropical Atlantic (-0.32) [48][49][50][51] and Atlantic Warm Pool 52,53 (a.k.a., Western Hemisphere Warm Pool 54,55 , -0.22) (Supplementary Table 1). This implies that the most important climate variability in the Atlantic preceding ENSO events could be the Winter Atlantic Niño.…”

Section: Introductionmentioning

confidence: 99%

Significant Winter Atlantic Niño effect on ENSO and its future projection

Park,

Yang,

Ham

et al. 2024

Preprint

View full text Add to dashboard Cite

The Atlantic Niño, a primary climatic variability mode in the equatorial Atlantic Ocean, exhibits pronounced variability not only in boreal summer but also in winter. However, the role of Winter Atlantic Niño in trans-basin interactions remains underexplored compared to its summer counterpart. Through analysis of observational reanalysis data since the mid-twentieth century, here we found that Winter Atlantic Niño significantly influences the development of El Niño–Southern Oscillation (ENSO), surpassing the impact of Summer Atlantic Niño with a longer lead time. This effect was reasonably captured in the historical simulation from the CMIP6, from a multi-model ensemble perspective. Further analysis with the global warming scenario projects that the influence of Winter Atlantic Niño on ENSO will persist into the future, contrasting with a reduced impact of Summer Atlantic Niño. Therefore, these findings underscore the importance of further investigating Winter Atlantic Niño for a comprehensive understanding of trans-basin interactions and their future change.

show abstract

Two regimes of inter-basin interactions between the Atlantic and Pacific Oceans on interannual timescales

Cited by 10 publications

References 56 publications

Inter-basin versus intra-basin sea surface temperature forcing of the Western North Pacific subtropical high’s westward extensions

Inter-basin versus intra-basin sea surface temperature forcing of the Western North Pacific subtropical high’s westward extensions

Fossil Fuel, Greenhouse Gas and Global Warming

Significant Winter Atlantic Niño effect on ENSO and its future projection

Contact Info

Product

Resources

About