Impacts of Atmospheric Pressure on the Annual Maximum of Monthly Sea-Levels in the Northeast Asian Marginal Seas

Han, MyeongHee; Cho, Yang‐Ki; Kang, Hyung-Ku; Nam, SungHyun; Byun, Do-Seong; Jeong, Kwang Yong; Lee, Eunil

doi:10.3390/jmse8060425

Cited by 6 publications

(6 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although previous studies have extensively focused on the processes controlling sea level variability at or within certain parts of the NEAMS as mentioned above [5,6,[8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27], interannual variations of the NEAMS-mean sea level as a whole system have not been investigated so far except by Han et al [26], who focused on the summer (August) period. Therefore, in this study, we attempt to address the processes that cause the interannual variability of the mean sea level of the NEAMS during winter (November and December; ND) in which the interannual spread is relatively large.…”

Section: Methodsmentioning

confidence: 99%

Interannual Variability of Winter Sea Levels Induced by Local Wind Stress in the Northeast Asian Marginal Seas: 1993–2017

Han

Nam

Cho

et al. 2020

JMSE

Self Cite

View full text Add to dashboard Cite

The interannual variability of winter sea levels averaged over the northeast Asian marginal seas, consisting of the Yellow Sea, East China Sea, and the East Sea (ES), was investigated. The spatial-mean sea level in winter observed using satellite altimetry shows significant interannual variations with a long-term rising trend of 3.88 during 1993–2017, with relatively high (Period H) and low (Period L) sea level anomalies. These anomalies correlate with the patterns of the East Asian winter monsoon at interannual timescales. The atmospheric pressure difference between the Sea of Okhotsk (SO) and ES around the Soya Strait is large during Period H. Ekman transport increases due to enhanced southeastward wind stress and results in a horizontal mass convergence that yields positive sea level anomalies during Period H. In contrast, the wind-induced transport is enhanced in the southern ES rather than in the southern SO resulting in horizontal mass divergence and negative anomalies in the spatial-mean winter sea level during Period L. Our results highlight the important roles of local wind forcing and Ekman dynamics in inducing interannual winter sea level variability in the region indicating the high predictive ability of atmospheric pressure anomalies around the Soya Strait.

show abstract

Section: Methodsmentioning

confidence: 99%

Interannual Variability of Winter Sea Levels Induced by Local Wind Stress in the Northeast Asian Marginal Seas: 1993–2017

Han

Nam

Cho

et al. 2020

JMSE

Self Cite

View full text Add to dashboard Cite

show abstract

“…The inflow water is divided into two main branches: one flowing north along the east coast of the Korean Peninsula and the other flowing northeast along the west coast of the Japanese Islands. Both branches circulate and meander within the ES, mostly in the southern ES, before flowing into the North Pacific and the Sea of Okhotsk through the TS and SS (Han et al, 2020a;Han et al, 2020b).…”

Section: Study Sitementioning

confidence: 99%

“…There is a marked seasonal variation of SL in the ES, with high values observed in summer and fall and low values observed in winter and spring due to the steric effect of seawater, mass exchange among the atmosphere and the three straits, and atmospheric pressure differences; the average SL variation is 30.4 cm between summer and winter from 1993 to 2018 (Han et al, 2020a). Furthermore, SL has gradually increased in the ES for decades owing to climate change, with an average increase rate of 3.78 mm year -1 from 1993 to 2017 (Han et al, 2020b).…”

Section: Sea Level Observation In the Esmentioning

confidence: 99%

“…Therefore, the difference in seawater transports among these straits can cause SL variation. Furthermore, the ES, being located in the mid-latitudes, exhibits clear seasonal variation in seawater temperature, resulting in a high SL in summer and low SL in winter (Han et al, 2020a). Unlike that in the open ocean, the SL in the ES can be influenced by a variety of factors, including the mechanisms described above.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Deconstructing the causes of July sea level variability in the East Sea from 1994 to 2021

2023

Self Cite

View full text Add to dashboard Cite

In 2021 the East Sea experienced its highest July sea level (65.09 cm), as well as the highest July sea surface and atmospheric temperatures, in the 29 years between 1993 and 2021. We present several methodologies to identify the more important causes of sea level change (SLC) in a semi-enclosed sea and explore the critical fluctuation of ocean mass transport divergence during a period of rapid sea level rise. Based on satellite altimeter data in the East Sea, the SLC, as reflected in the absolute dynamic topography (ADT), which is the ADT difference between the last and first days of a month, was 7.18 cm in July 2021. This may reflect a combination of oceanic and atmospheric factors: ocean heat transport divergence among the Korea, Tsugaru, and Soya Straits was found to contribute 2.32 cm of SLC, atmospheric heat flux at the sea surface contributed 2.87 cm of SLC, and mass divergence (including errors) accounted for 1.98 cm of SLC. The monthly mean sea level (ADT) variation in the East Sea should be examined in terms of the oceanic and atmospheric fluxes, and the SLC sources can additionally be divided into heat and others (mass + errors). The proportional contribution of heat to SLC from 1994 to 2021 was 97.4%. Although the contributions of mass and errors were small, there were substantial temporal fluctuations, as their standard deviation reached up to 96.7% of that of SLC in ADT. In the near future, a more precise analysis of the contributions of mass and errors to SLC is required.

show abstract

“…The front movement due to interannual variations in the paths of the Tsushima Warm Current is also responsible for the long-term variability in sea-level in this region (Kim et al, 2002;Choi et al, 2004;Kang et al, 2005;Pak et al, 2019;Lee et al, 2022). Interannual variations in sea-level over the East Asian marginal seas during summer and winter have been attributed to interannual changes in regional sea surface wind patterns (Han et al, 2020a, Han et al, 2020b. Despite the existing research on the various dynamics of long-term sea-level variations in the EJS, a lack of quantitative understanding of the cause of the localized SLR rates exceeding 6 mm yr -1 observed around Ulleung Island in the southwestern region of the EJS remains.…”

Section: Introductionmentioning

confidence: 99%

Eddy-driven sea-level rise near the frontal region off the east coast of the Korean peninsula during 1993–2020

Lee,

Park,

Park

2024

Front. Mar. Sci.

View full text Add to dashboard Cite

IntroductionUnderstanding the underlying dynamics of regional sea-level rise (SLR), which often deviates from global trends, is crucial for mitigating and adapting to the impacts of severe climate change. This study investigated the causes of high regional SLR rates (> 6.0 mm yr-1) around the frontal region near Ulleung Island in the southwestern East/Japan Sea (EJS). Despite exhibiting rates higher than the global average (3.1 mm yr-1) from 1993 to 2020, the reasons for these higher rates in this region have not been clearly elucidated.MethodsWe aimed to clarify the quantitative effect of the long-term variations of the Ulleung Warm Eddy (UWE) on the high SLR rates near Ulleung Island based on satellite altimetry and ship-based hydrographic data.ResultsDuring this period, the temperature within the UWE increased, particularly at the temperature-homogeneous layer of approximately 200 m, the lower boundary of the UWE deepened, and the eddy duration per year increased, resulting in high SLR rates within the eddy owing to the steric height rise. The long-term variations in the internal temperature and vertical thickness of the UWE had significantly comparable impacts on SLR rates, with the duration being less influential. The SLR rates by integrating all long-term variations in the UWE (7.6 mm yr-1) quantitatively explained the high long-term SLR rates at Ulleung Island (7.0 mm yr-1).DiscussionThe increasing temperature within the UWE was attributed to the rising temperature of water flowing through the southwestern strait (Korean Strait) in late fall, and the deepening lower boundary and the increasing duration of the UWE resulted from the increased horizontal temperature gradients near the front, leading to enhanced baroclinic instability in the subsurface layers. Our findings suggest that long-term variations in mesoscale eddies can significantly influence the regional SLR rates, deviating substantially from the global average in the frontal region.

show abstract

Impacts of Atmospheric Pressure on the Annual Maximum of Monthly Sea-Levels in the Northeast Asian Marginal Seas

Cited by 6 publications

References 28 publications

Interannual Variability of Winter Sea Levels Induced by Local Wind Stress in the Northeast Asian Marginal Seas: 1993–2017

Interannual Variability of Winter Sea Levels Induced by Local Wind Stress in the Northeast Asian Marginal Seas: 1993–2017

Deconstructing the causes of July sea level variability in the East Sea from 1994 to 2021

Eddy-driven sea-level rise near the frontal region off the east coast of the Korean peninsula during 1993–2020

Contact Info

Product

Resources

About