The zonal North Pacific Oscillation: a high-impact atmospheric teleconnection pattern influencing the North Pacific and North America

Zhuge, Anran; Tan, Benkui

doi:10.1088/1748-9326/ac037b

Cited by 4 publications

(3 citation statements)

References 52 publications

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“…The decreased influence of the AL on North Pacific (Figure 10b vs. Figure 10c) corresponds well with numerous previous studies (Fereday et al, 2020;Hwang et al, 2022;Litzow et al, 2020;Zhou et al, 2020;Zhuge & Tan, 2021). They mentioned that the eastward shift of the AL center is observed.…”

Section: Physical Driver Of Excessive N-es Increases In Marine Heatwa...supporting

confidence: 91%

“…They mentioned that the eastward shift of the AL center is observed. Additionally, Zhuge and Tan (2021) explain why the increased impact of the zonal North Pacific Oscillation (Mode 3) is responsible for the east‐to‐west wave pattern (Figure S5 vs. Figure S6 in Supporting Information ).…”

Section: What Causes Positive Trends In Marine Heatwave Longevity And...mentioning

confidence: 99%

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Rapidly Changing East Asian Marine Heatwaves Under a Warming Climate

et al. 2023

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The East Asian marginal seas (EAMS) are one of the fastest‐warming ocean regions globally. This study presents the long‐term trends (1982–2020) of extreme ocean warming events called “marine heatwaves” over the EAMS and examines the relationships between marine heatwave trends and mean SST warming trends. We focus on five subregions with different influences from atmospheric perturbation and ocean currents: the northern East Sea (N‐ES), southern East Sea, Yellow Sea, Korea Strait (KS), and East China Sea (ECS). During the past four decades, marine heatwave duration and intensity in the EAMS have increased to approximately +4 days and +0.3°C per decade on average, respectively. In summer, the positive trend of marine heatwaves is the highest in the ECS, primarily due to the rapidly increasing mean sea surface temperature (SST). In winter, the N‐ES reveals remarkably rapid increases in marine heatwave properties in the last two decades, with increasing rates of approximately 6.2 (4.9) times longer total duration (stronger intensity) than the global average changes. Beyond the impact of the rapid increase in mean SST, the N‐ES marine heatwaves can be further extended due to the northward shift of the East Korea Warm Current. In general, mean SST changes are critical to the increasing trend in marine heatwave duration and intensity. This study further emphasizes that the changes in ocean circulation may expedite more rapid changes in extreme ocean events, which can produce more vulnerability in some places, such as the N‐ES, to marine heatwaves under continued global warming.

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Section: Physical Driver Of Excessive N-es Increases In Marine Heatwa...supporting

confidence: 91%

Section: What Causes Positive Trends In Marine Heatwave Longevity And...mentioning

confidence: 99%

Rapidly Changing East Asian Marine Heatwaves Under a Warming Climate

et al. 2023

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“…To understand the mechanisms for the ASPA pattern development and maintenance in the Southern Hemisphere westerlies, day‐to‐day APE and KE budgets for ASPA pattern are estimated, in a way similar to Tanaka et al (2016) and Zhuge and Tan (2021a, 2021b). As indicated in Figure 3a, the baroclinic energy conversion from the climatological flow (CP B , solid black line) acts as the only APE source to overcome the thermal damping caused by turbulence, transient eddies, and diabatic heating.…”

Section: Resultsmentioning

confidence: 99%

A new subseasonal atmospheric teleconnection bridging tropical deep convection over the western North Pacific and Antarctic weather

Sun

Tan

2022

Atmospheric Science Letters

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Previous studies indicate that convective heating variability of the western North Pacific summer monsoon (WNPSM) influences strongly weather and climate over East Asia. Based on daily reanalysis data and interpolated outgoing longwave radiation (OLR) data, this study demonstrates that the WNPSM convection can also cause severe weather events remotely over the Antarctic through the exciting of the Australia-South Pacific-Atlantic wave train (ASPA pattern). Surface air temperature (SAT) rises over the Ross Sea-Mawson-Dumont d'Urville Seas sector and over the Weddell Sea, while the SAT drops over the Amundsen-Bellingshausen Seas. Concurrently, sea ice concentration (SIC) is reduced over the Ross Sea and enhanced over the Amundsen-Bellingshausen Seas. The result suggests that the newly found ASPA pattern may serve as an important bridge linking the WNPSM convection and the weather over the Antarctic region.The dynamics of ASPA's formation and propagation are also investigated comprehensively. Day-to-day energy budget analysis suggests that after its initiation by WNPSM convection, the ASPA pattern is driven by the baroclinic energy conversion from the climatological flow and nonlinear term. The barotropic energy conversion from the climatological flow contributes to positive KE tendency before day +1 and negative KE tendency after day +1. It is therefore extremely important to improve the representations of the climatological-mean sea ice and jet stream, wave-mean flow interaction and wave-wave interaction in the mid-and high-latitudes of the Southern Hemisphere, as well as the convection over the WNPSM region of the Northern Hemisphere in numerical model for a better weather prediction for the Antarctic.

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