Combined effect of the Arctic Oscillation and the Western Pacific pattern on East Asia winter temperature

Park, Hye-Jin; Ahn, Joong‐Bae

doi:10.1007/s00382-015-2763-2

Cited by 61 publications

(40 citation statements)

References 44 publications

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“…The winter temperature variations over East Asia have been linked to AO (Gong et al, ; Wu & Wang, ), the Siberian high (Takaya & Nakamura, ), ENSO (Wang et al, ), the Western Pacific pattern (Park & Ahn, ), snow cover (Li & Wang, ), and the Arctic sea ice (Chen et al, ; Wu et al, ). Previous studies indicated that the frequency, intensity, spatial extent, and duration of cold events over East Asia depend upon the phase of AO (Jeong & Ho, ; Park et al, ).…”

Section: Summary and Discussionmentioning

confidence: 99%

Comparison of Intraseasonal East Asian Winter Cold Temperature Anomalies in Positive and Negative Phases of the Arctic Oscillation

Song

2018

JGR Atmospheres

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This study investigates the relationship between intraseasonal variations of the Arctic Oscillation (AO) and East Asian winter temperature. Based on the lead‐lag correlation between 30‐ and 60‐day band‐pass filtered daily AO index and regional mean surface temperature anomalies over eastern China, it is found that the cold temperature anomalies occur following both positive and negative AO phases with nearly the same probability. Composite analysis reveals prominent differences in surface temperature and tropospheric circulation anomalies between the two types of years. During the years when negative AO leads cold anomalies over East Asia, the AO‐related pressure anomalies extend to Eurasia, inducing an enhanced Siberian high with a large spatial coverage in midlatitude and high latitude; the midtropospheric wave train along the polar front jet takes an eastward path and induces the deepening of the East Asian trough; the resultant cold surface temperature anomalies affect a large region over East Asia. During the years when positive AO leads cold anomalies, the AO‐related pressure anomalies extend to North America and the high pressure anomalies over East Asia are located at midlatitudes with a relatively small spatial coverage; the midtropospheric wave train along the polar front jet takes a southward path over Asia, inducing the development of a trough over subtropical Asia with a supplementary contribution from a subtropical wave train; the resultant cold surface temperature anomalies influence inland East Asia with a relatively small extent. There appears to be a notable difference in the relationship between the stratospheric and tropospheric change between the two types of years.

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Section: Summary and Discussionmentioning

confidence: 99%

Comparison of Intraseasonal East Asian Winter Cold Temperature Anomalies in Positive and Negative Phases of the Arctic Oscillation

Song

2018

JGR Atmospheres

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“…The Arctic Oscillation (AO) has less direct influence south of 30°N (supporting information Table S1 and Figure S4). However, combined negative AO in phase with negative WP indices can force the East Asian jet stream to migrate southward and cause anomalously cold surface air temperatures in East Asia (Park & Ahn, 2016). At decadal timescale, Jhun and Lee (2004) Figure S5) that is recognized as a major regime shift in the East Asian region (Lo & Hsu, 2010;Tsunoda et al, 2008).…”

Section: The Atmospheric Forcingmentioning

confidence: 99%

A Reconstruction of Subtropical Western North Pacific SST Variability Back to 1578, Based on a Porites Coral Sr/Ca Record from the Northern Ryukyus, Japan

2017

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We present a seasonal reconstruction of sea surface temperature (SST) from 1578 to 2008, based on a Porites coral Sr/Ca record from the northern Ryukyus, within the Kuroshio southern recirculation gyre. Interannual SST anomalies are generally ~0.5°C, making Sr/Ca‐derived SST reconstructions a challenging task. Replicate measurements along adjacent coral growth axes, enabled by the laser ablation inductively coupled plasma mass spectrometry technique used here, give evidence of rather large uncertainties. Nonetheless, derived winter SST anomalies are significantly correlated with the Western Pacific atmospheric pattern which has a dominant influence on winter temperature in East Asia. Annual mean SSTs show interdecadal variations, notably cold intervals between 1670 and 1700 during the Maunder Minimum (MM) and between 1766 and 1788 characterized by a negative phase of the North Atlantic Oscillation. Cold summers in 1783 and 1784 coincide with the long‐lasting Laki eruption that had a profound impact on the Northern Hemisphere climate, including the severe “Tenmei” famine in Japan. The decades between 1855 and 1900 are significantly cooler than the first half of the twentieth century, while those between 1700 and 1765, following the MM, are warmer than average. SST variability in the Ryukyus is only marginally influenced by the Pacific Decadal Oscillation, so that external forcing remains the main driver of low‐frequency temperature changes. However, the close connection between the Kuroshio extension (KE) and its recirculation gyre suggests that decadal SST anomalies associated with the KE front also impact the Ryukyus, and there is a possible additional role for feedback of the Kuroshio‐Oyashio variability to the large‐scale atmosphere at decadal timescale.

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“…The occurrence of cold temperature anomalies over East Asia during boreal winter is linked to both the Arctic Oscillation (AO; Gong et al, ; Jeong & Ho, ; Park & Ahn, ; Park et al, , ; Song & Wu, ; Thompson & Wallace, , ; Wu & Wang, ) and the Madden‐Julian Oscillation (MJO; Abdillah et al, ; He et al, ; Jeong et al, ; Madden & Julian, , ; Seo et al, ). Both positive and negative phases of the AO can lead to cold anomalies over eastern China (Jeong & Ho, ; Park et al, , , ; Song & Wu, ).…”

Section: Introductionmentioning

confidence: 99%

Different Cooperation of the Arctic Oscillation and the Madden‐Julian Oscillation in the East Asian Cold Events During Early and Late Winter

Song

2019

JGR Atmospheres

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Previous studies indicated that boreal winter cold events over East Asia are related to the Madden‐Julian Oscillation (MJO) convection situating over the tropical Indian Ocean (commonly known as MJO phases 2–3). The present study identified that more than 70% of intraseasonal cold events over eastern China are associated with the MJO phases 2–3 in early winter (November–December) but less than 50% of the cold events are linked to MJO phases 2–3 in late winter (February–March). This difference is related to a change in the connection between the MJO and the Arctic Oscillation (AO) from early winter to late winter. In early winter, MJO phases 2–3 related cold events over eastern China are related to a midlatitude Rossby wave train triggered by negative AO, as MJO phases 2–3 tend to follow negative AO. In late winter, the connection between the MJO and the AO is weak, which leads to a weakened relationship between MJO phases 2–3 and cold events. The weakened connection between the MJO and the AO in late winter is caused by the weakened meridional heat fluxes and their weakened constructive interference with climatological stationary waves and a decrease in the poleward propagation of tropospheric eddy momentum and heat fluxes over the western Pacific.

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Combined effect of the Arctic Oscillation and the Western Pacific pattern on East Asia winter temperature

Cited by 61 publications

References 44 publications

Comparison of Intraseasonal East Asian Winter Cold Temperature Anomalies in Positive and Negative Phases of the Arctic Oscillation

Comparison of Intraseasonal East Asian Winter Cold Temperature Anomalies in Positive and Negative Phases of the Arctic Oscillation

A Reconstruction of Subtropical Western North Pacific SST Variability Back to 1578, Based on a Porites Coral Sr/Ca Record from the Northern Ryukyus, Japan

Different Cooperation of the Arctic Oscillation and the Madden‐Julian Oscillation in the East Asian Cold Events During Early and Late Winter

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