scholarly journals Test of the application of the TYWAVES model to prediction of swell in the east China Sea from three tropical cyclones in the western north Pacific.

1980 ◽  
Author(s):  
Hyong Sun. Lee ◽  
Lee Hyong. Sun ◽  
Keyword(s):  
Tropical Cyclones ◽  
East China Sea ◽  
North Pacific ◽  
Western North Pacific ◽  
East China ◽  
The East China Sea ◽  
China Sea

scholarly journals Tropical cyclones over the western north Pacific since the mid-nineteenth century

2021 ◽  
Vol 164 (3-4) ◽  
Author(s):  
Hisayuki Kubota ◽  
Jun Matsumoto ◽  
Masumi Zaiki ◽  
Togo Tsukahara ◽  
Takehiko Mikami ◽  
...  
Keyword(s):  
Nineteenth Century ◽  
East China Sea ◽  
North Pacific ◽  
Western North Pacific ◽  
East China ◽  
Pressure Data ◽  
The East China Sea ◽  
China Sea ◽  
Spatial Coverage ◽  
Landfall Location

AbstractTropical cyclone (TC) activities over the western North Pacific (WNP) and TC landfall in Japan are investigated by collecting historical TC track data and meteorological observation data starting from the mid-nineteenth century. Historical TC track data and TC best track data are merged over the WNP from 1884 to 2018. The quality of historical TC data is not sufficient to count the TC numbers over the WNP due to the lack of spatial coverage and different TC criteria before the 1950s. We focus on TC landfall in Japan using a combination of TC track data and meteorological data observed at weather stations and lighthouses from 1877 to 2019. A unified TC definition is applied to obtain equivalent quality during the whole analysis period. We identify lower annual TC landfall numbers during the 1970s to the 2000s and find other periods have more TC landfall numbers including the nineteenth century. No trend in TC landfall number is detected. TC intensity is estimated by an annual power dissipation index (APDI). High APDI periods are found to be around 1900, in the 1910s, from the 1930s to 1960s, and after the 1990s. When we focus on the period from 1977 to 2019, a significant increasing trend of ADPI is seen, and significant northeastward shift of TC landfall location is detected. On the other hand, TC landfall location shifts northeastward and then southwestward in about 100-year interval. European and US ships sailed through East and Southeast Asian waters before the weather station network was established in the late nineteenth century. Then, we focus on TC events in July 1853 observed by the US Naval Japan Expedition of Perry’s fleet and August 1863 by a UK Navy ship that participated in two wars in Japan. A TC moved slowly westward over the East China Sea south of the Okinawa Islands from 21 to 25 July 1853. Another TC was detected in the East China Sea on 15–16 August 1863 during the bombardment of Kagoshima in southern Japan. Pressure data are evaluated by comparing the observations made by 10 naval ships in Yokohama, central Japan during 1863–1864. The deviation of each ship pressure data from the 10 ships mean is about 2.7–2.8 hPa.

Satellite-derived SST validation based on in-situ data during summer in the East China Sea and western North Pacific

2010 ◽  
Vol 45 (3) ◽  
pp. 159-170 ◽  
Author(s):  
Eun Jin Kim ◽  
Sok Kuh Kang ◽  
Sung-Tae Jang ◽  
Jae Hak Lee ◽  
Young Ho Kim ◽  
...  
Keyword(s):  
East China Sea ◽  
North Pacific ◽  
Western North Pacific ◽  
East China ◽  
The East China Sea ◽  
China Sea ◽  
In Situ Data

scholarly journals The storm-track suppression over the western North Pacific from a cyclone life-cycle perspective

2021 ◽  
Vol 2 (1) ◽  
pp. 55-69
Author(s):  
Sebastian Schemm ◽  
Heini Wernli ◽  
Hanin Binder
Keyword(s):  
Life Cycle ◽  
East China Sea ◽  
North Pacific ◽  
Western North Pacific ◽  
Storm Track ◽  
East China ◽  
The East China Sea ◽  
China Sea ◽  
The North ◽  
The North Pacific

Abstract. Surface cyclones that feed the western part of the North Pacific storm track and experience a midwinter suppression originate from three regions: the East China Sea (∼30∘ N), the Kuroshio extension (∼35∘ N), and downstream of Kamchatka (∼53∘ N). In midwinter, in terms of cyclone numbers, Kuroshio (45 %) and Kamchatka (40 %) cyclones dominate in the region where eddy kinetic energy is suppressed, while the relevance of East China Sea cyclones increases from winter (15 %) to spring (20 %). The equatorward movement of the baroclinicity and the associated upper-level jet toward midwinter influence cyclones from the three genesis regions in different ways. In January, Kamchatka cyclones are less numerous and less intense, and their lifetime shortens, broadly consistent with the reduced baroclinicity in which they grow. The opposite is found for East China Sea cyclones, which in winter live longer, are more intense, and experience more frequently explosive deepening. The fraction of explosive East China Sea cyclones is particularly high in January when they benefit from the increased baroclinicity in their environment. Again, a different and more complex behavior is found for Kuroshio cyclones. In midwinter, their number increases, but their lifetime decreases; on average they reach higher intensity in terms of minimum sea level pressure, but the fraction of explosively deepening cyclones decreases and the latitude where maximum growth occurs shifts equatorward. Therefore, the life cycle of Kuroshio cyclones seems to be accelerated in midwinter with a stronger and earlier but also shorter deepening phase followed by an earlier decay. Once they reach the latitude where eddy kinetic energy is suppressed in midwinter, their baroclinic conversion efficiency is strongly reduced. Together, this detailed cyclone life-cycle analysis reveals that the North Pacific storm-track suppression in midwinter is related to fewer and weaker Kamchatka cyclones and to more equatorward intensifying and then more rapidly decaying Kuroshio cyclones. The less numerous cyclone branch from the East China Sea partially opposes the midwinter suppression. The cyclones passing through the suppressed region over the western North Pacific do not propagate far downstream and decay in the central North Pacific. The behavior of cyclones in the eastern North Pacific requires further analysis.

scholarly journals The North Pacific Storm-Track Suppression Explained From a Cyclone Life-Cycle Perspective

2020 ◽  
Author(s):  
Sebastian Schemm ◽  
Heini Wernli ◽  
Hanin Binder
Keyword(s):  
Life Cycle ◽  
East China Sea ◽  
North Pacific ◽  
Storm Track ◽  
East China ◽  
The East China Sea ◽  
China Sea ◽  
The North ◽  
The North Pacific ◽  
North Pacific Storm Track

Abstract. Surface cyclones that feed the part of the North Pacific storm track that experience a midwinter suppression originate from three regions: the East China Sea (~ 30º N), the Kuroshio extension (~ 35º N), and downstream of Kamchatka (~ 53º N). In terms of cyclone numbers, Kuroshio (45 %) and Kamchatka (40 %) cyclones dominate in the region where eddy kinetic energy is suppressed, while the relevance of East China Sea cyclones increases from winter (15 %) to spring (20 %). The equatorward movement during midwinter of the baroclinicity and the associated upper-level jet influences cyclones from the three genesis regions in different ways. In January, Kamchatka cyclones are less numerous, less intense and their lifetime shortens; broadly consistent with the reduced baroclinicity in which they grow. The opposite is found for East China Sea cyclones, which in winter live longer, are more intense, and experience more frequently explosive deepening. The fraction of explosive East China Sea cyclones is particularly high in January when they benefit from the increased baroclinicity in their environment. Again, a different and more complex behavior is found for Kuroshio cyclones. In midwinter, their number increases, but their lifetime decreases; on average they reach higher intensity, in terms of minimum sea-level pressure, but the fraction of explosively deepening cyclones reduces and the latitude where maximum growth occurs shifts equatorward. Therefore, the life cycle of Kuroshio cyclones seems to be accelerated in midwinter with a stronger and earlier but also shorter deepening phase followed by an earlier decay. Once they reach the latitude where eddy kinetic energy is suppressed in midwinter, their baroclinic conversion efficiency is strongly reduced. Together, this detailed cyclone life-cycle analysis reveals that the North Pacific storm-track suppression in midwinter is related to fewer and weaker Kamchatka cyclones and to more equatorward intensifying and then more rapidly decaying Kuroshio cyclones. The less numerous cyclone branch from the East China Sea partially opposes the midwinter suppression.

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