Characteristics and Mechanisms of Marine Heatwaves in the East Asian Marginal Seas: Regional and Seasonal Differences

Choi, Woo‐Jung; Bang, Minkyoung; Joh, Youngji; Ham, Yoo‐Geun; Kang, Nam‐Young; Jang, Chan Joo

doi:10.3390/rs14153522

Cited by 12 publications

(15 citation statements)

References 47 publications

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“…This mechanism is similar to that proposed by Choi et al. (2022), that the northward shift of the subpolar front drives the winter marine heatwaves over the East Sea. Pak et al.…”

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

confidence: 89%

“…Our suggested mechanism that an atmospheric influence predominated in the earlier period, but an oceanic influence increased SST variance in the recent period, is briefly summarized in Figure 11c. This mechanism is similar to that proposed by Choi et al (2022), that the northward shift of the subpolar front drives the winter marine heatwaves over the East Sea. Pak et al (2019) mentioned that the separation latitude of the EKWC has interannual variations and recently tends to shift northward, beyond 38°N.…”

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

confidence: 87%

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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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“…This mechanism is similar to that proposed by Choi et al. (2022), that the northward shift of the subpolar front drives the winter marine heatwaves over the East Sea. Pak et al.…”

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

confidence: 89%

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

confidence: 87%

Rapidly Changing East Asian Marine Heatwaves Under a Warming Climate

et al. 2023

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“…In many cases, the MHWs in summer are mainly attributed to atmospheric forcing [11]. Therefore, we conducted further investigation to identify the remote forcings that significantly influenced the persistent high-pressure system leading to the longlasting MHWs in the ECS.…”

Section: What Caused the Long-lasting Mhw?mentioning

confidence: 99%

“…In particular, the summer of 2022 was anomalously warm in East Asia, with one of the most intense MHWs ever recorded in the ECS. MHWs are influenced by regional atmospheric processes, such as enhanced incoming shortwave radiation due to highpressure system, and by oceanic processes, including warm current advection, reduced vertical mixing, and ocean stratification [11][12][13]. Furthermore, the interaction between the atmosphere and ocean also controls MHWs; for example, air-sea heat exchanges via changes in wind speed control mixed-layer and latent heat fluxes [14,15].…”

Section: Introductionmentioning

confidence: 99%

The record-breaking 2022 long-lasting marine heatwaves in the East China Sea

Kim

Chu

et al. 2023

Environ. Res. Lett.

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In 2022, record-breaking long-lasting marine heatwaves (MHWs) occurred in the East China Sea (ECS), which persisted for 62 days during boreal summer. This exceeded the average MHWs duration of 10 days by a factor of 6. In addition, 2022 was also recorded as a year of many extreme events throughout Asia, such as summer floods in China and Pakistan, droughts and extreme heat in Europe, raising the question of whether they were caused by a “triple-dip” La Niña, which has persisted since September 2020. Here we examine the key local and remote processes that led to the 2022 MHWs in the ECS using mixed-layer heat budget analysis. During the onset of the MHWs, a salinity-stratified shallow mixed-layer due to the large river discharge from the Yangtze-Huaihe River floods in June enhanced warm ocean temperature in the ECS. Simultaneously, an anomalous anticyclone maintained by the stationary Rossby wave, which is generated by vorticity forcings in mid-latitudes and thermal forcing in Pakistan, settled in the corresponding region and led to the long-lasting MHWs until Typhoon Hinnamnor began to dissipate the wave in early September. This study improves our understanding of the physical mechanism of flood-related MHWs that have increased with recent climate change.

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“…Furthermore, numerical ocean models have been employed for MHW forecasting in this region [18]. Seasonal variation of MHW has been shown to be important in marginal sea [19,20,21,22]. Meanwhile, seasonal variation of SST is significant in the ECS [20].…”

Section: Introductionmentioning

confidence: 99%

Seasonal variation of Marine Heat Wave in the East China Sea

Li,

He,

Zhao

et al. 2024

J. Phys.: Conf. Ser.

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The satellite-based daily sea surface temperature was used to study the Marine Heat Wave (MHW) in the East China Sea. The seasonal variation of MHW is significant. In winter, the 200 m isobath on the shelf is identified as a section with high-frequency MHW. The duration of MHW is relatively long on the slope and deep basin, and mean intensity of MHW is obviously high in the central Taiwan Strait. In summer, the frequency of MHW is relatively high near the coast of the China Mainland. Meanwhile, the shelf section of the 200 m isobath is also high in frequency. Otherwise, the duration of MHW on the shelf is short. In the northern shelf, the mean intensity of MHW is obviously higher. The total days and maximum intensity of MHW are also discussed, aiming at giving near-fully description of MHW in the East China Sea.

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Characteristics and Mechanisms of Marine Heatwaves in the East Asian Marginal Seas: Regional and Seasonal Differences

Cited by 12 publications

References 47 publications

Rapidly Changing East Asian Marine Heatwaves Under a Warming Climate

Rapidly Changing East Asian Marine Heatwaves Under a Warming Climate

The record-breaking 2022 long-lasting marine heatwaves in the East China Sea

Seasonal variation of Marine Heat Wave in the East China Sea

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