• 제목/요약/키워드: Western pacific

검색결과 923건 처리시간 0.029초

Relationship between Interannual Variability of Phytoplankton and Tropical Cyclones in the Western North Pacific

  • Park, Jong-Yeon;Kug, Jong-Seong;Park, Ji-Soo;Chang, Chan-Joo
    • Ocean and Polar Research
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    • 제34권1호
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    • pp.29-35
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    • 2012
  • We investigated the interannual relationship between chlorophyll concentrations in the western North Pacific and tropical cyclones (TCs) in the western North Pacific by analyzing data collected for >12 years. Despite the short-term scale (2~3 weeks) in the contribution of tropical cyclones to phytoplankton, the current study revealed that the long-term chlorophyll variability in the western North Pacific is profoundly related to long-term variability in the frequency of TCs. It was also found that the Pacific decadal oscillation (PDO) tends to control such relationships between the 2 bio-physical systems. This result suggests a significant climatic relationship between TC activity and marine phytoplankton, and also suggests the possibility of more accurate estimations of primary production in the western North Pacific.

북서태평양 아열대고기압 지수를 이용한 북동아시아 여름철 강수의 진단 (Diagnosis of Northeast Asian Summer Precipitation using the Western North Pacific Subtropical High Index)

  • 권민호
    • 한국지구과학회지
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    • 제34권1호
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    • pp.102-106
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    • 2013
  • 동아시아 여름몬순의 강도와 북서태평양 여름몬순의 강도는 음의 상관을 갖는 것으로 알려져 왔다. 여기서 우리는 이 관계를 이용하여 북동아시아 여름철 강수의 잠재예측성을 조사하였다. 북서태평양 아열대 고기압은 북서태평양 여름몬순을 적절히 나타내며, 북서태평양-동아시아 지역 여름철 기후편차에 주된 성분이다. 그리고 북서태평양 아열대고기압 변동성을 이용한 북동아시아 여름철 강수 편차의 추정값은 북서태평양 여름몬순지수를 이용하는 것보다 더 낫다.

Temporal Variation of the Western Pacific Subtropical High Westward Ridge and its Implicationson South Korean Precipitation in Late Summer

  • Ahn, Kuk-Hyun
    • 한국수자원학회:학술대회논문집
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    • 한국수자원학회 2019년도 학술발표회
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    • pp.24-24
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    • 2019
  • This study investigates variations in the Western Pacific Subtropical High (WPSH) and its impact on South Korean precipitation in late summer during the period between 1958 and 2017. Composite analysis reveals that precipitation occurrence is directly linked to the displacement of the WPSH western ridge, a single, large-scale feature of the atmosphere in the Pacific Ocean. When WPSH ridging is located northwest (NW) of its climatological mean position, excessive precipitation is expected in late summer due to enhanced moisture transport. On the other hand, a precipitation deficit is frequently observed when the western ridge is located in the southeast (SE). Different phases of the WPSH are associated with lagged patterns of Pacific and Atlantic atmospheric and oceanic variability, introducing the potential to predict variability in the WPSH western ridge and its climate over northern East Asia by one month. Based on the identified SST patterns, a simple statistical model is developed and improvement in the ability to predict is confirmed through a cross-validation framework. Finally, the potential for further improvements in WPSH-based predictions is addressed.

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한국 여름가뭄과 북서태평양 태풍활동의 연관성 (Relationships between Summer Droughts in Korea and Activities of Tropical Cyclones over the Northwestern Pacific)

  • 최기선;김도우;변희룡
    • 대기
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    • 제18권4호
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    • pp.279-286
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    • 2008
  • In the tropical western Pacific (especially, west of 135oE, including South China Sea and the Philippines), during boreal summer, it was found that a strong correlation exists between the tropical cyclone activity and the drought conditions in Korea. During the summer drought, firstly, there were strong ascending flows over the tropical western Pacific with more tropical cyclone genesis, and to compensate for this, descending flows develop in the mid-latitudes, thereby causing drought; in other words, a secondary circulation is formed between the tropical western Pacific and mid-latitudes of East Asia. Secondly, the developments of both the subtropical western Pacific high and the Manchurian low are suppressed. As a result, both the land-sea pressure gradient and the southerly flow from low-latitudes to Korean area are also weakened, which reduces approaches of tropical cyclones to this area despite the high frequency of their geneses.

The Overview on the Traditional Medicine in the Western Pacific Region

  • Roh Pyong-Ui;Yoo Wang-Keun
    • 대한예방한의학회지
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    • 제8권1호
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    • pp.147-153
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    • 2004
  • This parer reviews the current situation on traditional medicine in the western pacific region. It mainly include government, scientific community and industry interests, national policies, practices and education, public financing systems and self-regulatory associations.

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국제한의학표준용어(WHO IST/WPRO) 및 국제한의학질병분류(ICTM/WPRO)의 개발 현황 보고 (Report on the Development of WHO International Standard Terminologies and International Classification of Traditional Medicine/Western Pacific Regional Office)

  • 심범상
    • 동의생리병리학회지
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    • 제21권3호
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    • pp.776-780
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    • 2007
  • Recently World Health Organization Western Pacific Regional Office (WHO/WPRO) has developed the WHO International Standard Terminologies on Traditional Medicine in the Western Pacific Region (IST), and is developing WHO International Classification of Traditional Medicine/Western Pacific Regional Office (ICTM/WPRO). Regarding ICTM, WHO/WPRO hoped that it will be incorporated to International Classification of Disease (ICD) 11$^{th}$ edition, published in 2015. The author reports the proceedings of these two standardizations on terminologies and diseases of traditional medicine in East Asia.

Interaction among the East Asian Summer and Winter Monsoons, the Tropical Western Pacific and ENSO Cycle

  • Huang, Rong-Hui;Lu, Ri-Yu;Chen, Wen;Chen, Ji-Rong
    • 대기
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    • 제13권2호
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    • pp.47-68
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    • 2003
  • Recent advances in the studies on the interaction between Asian monsoon and ENSO cycle are reviewed in this paper. Through the recent studies, the East Asian summer monsoon circulation system and the East Asian climate system have proposed. Moreover, different responses of the (winter and summer) monsoon circulation and summer rainfall anomalies in East Asia to ENSO cycle during its different stages have been understood further. Recently, the studies on the dynamical effect of East Asian monsoon on the thermal variability of the tropical western Pacific and ENSO cycle have been greatly advanced. These studies demonstrated further that ENSO cycle originates from the tropical western Pacific, and pointed out that the dynamical effect of East Asian winter and summer monsoons on ENSO cycle may be through the atmospheric circulation and zonal wind anomalies over the tropical western Pacific, which can excite the oceanic Kelvin wave and Rossby waves in the equatorial Pacific. Besides, the scientific problems in the interaction between Asian monsoon and ENSO cycle, which should be studied further in the near future, are also pointed out in this paper.

2009년 태풍 특징 (Characteristics of Tropical Cyclones Over the Western North Pacific in 2009)

  • 차은정;권혁조;김세진
    • 대기
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    • 제20권4호
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    • pp.451-466
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    • 2010
  • This edition has continued since 2006 tropical cyclone season our effort to provide standard tropical cyclone summaries by the western North Pacific basin and detailed reviews of operationally or meteorologically significant tropical cyclones to document significant challenges and shortfalls in the tropical cyclone warning system to serve as a focal point for research and development efforts. The tropical cyclone season of 2009 in the western North Pacific basin is summarized and the main characteristics of general atmospheric circulation are described. Also, the official track and intensity forecasts of these cyclones are verified. The total number is less than 59-year (1951~2009) average frequency of 26.4. The 2009 western North Pacific season was an inactive one, in which 22 tropical storms generated. Of these, 13 TCs reached typhoon (TY) intensity, while the rest 9 TCs only reached severe tropical storm (STS) and tropical storm (TS) intensity - three STS and six TS storms. On average of 22 TCs in 2009, the Korea Meteorological Administration official track forecast error for 48 hours was 219 km. There was a big challenge for individual cyclones such as 0902 CHAN-HOM, 0909 ETAU, and 0920 LUPIT resulting in significant forecast error, with both intricate tracks and irregular moving speed. There was no tropical cyclone causing significant direct impact to the country. The tropical cyclone season in 2009 began in May with the formation of KUJIRA (0901). In September and October, ten TSs formed in the western North Pacific in response to enhanced convective activity. On the other hand, the TC activity was very weak from June to July. It is found that the unusual anti-cyclonic circulation in the lower level and weak convection near the Philippines are dominant during summertime. The convection and atmospheric circulation in the western North Pacific contributed unfavorable condition for TC activity in the 2009 summertime. Year 2009 has continued the below normal condition since mid 1990s which is apparent in the decadal variability in TC activity.

2007년 여름 북서태평양 이산화탄소 분압의 공간 변동성 (Spatial Variability of Surface fCO2 in the Western North Pacific during Summer 2007)

  • 최상화;김동선;김경희;민홍식
    • Ocean and Polar Research
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    • 제30권3호
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    • pp.335-345
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    • 2008
  • In order to study spatial variabilities and major controlling factors, we measured fugacity of $CO_2(fCO_2)$, temperature, salinity and nutrients in surface waters of the North Pacific($7^{\circ}30'{\sim}33^{\circ}15'N$, $123^{\circ}56'E{\sim}164^{\circ}24'W$) between September$\sim$October 2007. The North Pacific and the marginal sea were distinguished by $fCO_2$ distribution as well as unique characteristics of temperature and salinity. There was a distinct diurnal SST variation in the tropical North Pacific area, and surface $fCO_2$ coincidently showed diurnal variation. In the North Pacific area, surface $fCO_2$ was mainly controlled by temperature, while in the marginal sea area it was primarily dependent on alkalinity and dissolved inorganic carbon concentrations. Air-sea $CO_2$ flux showed a large spatial variation, with a range of $-6.10{\sim}5.06\;mmol\;m^{-2}day^{-1}$. The center of subtropical gyre of North Pacific acted as a source of $CO_2(3.09{\pm}0.95\;mmol\;m^{-2}day^{-1})$. Tropical western North Pacific (i.e. the 'warm pool' area and the subtropical western North Pacific) acted as weak sources of $CO_2$($1.07{\pm}1.20\;mmol\;m^{-2}day^{-1}$ and $0.50{\pm}0.53\;mmol\;m^{-2}day^{-1}$, respectively). In the marginal sea, however, the flux was estimated to be $-0.68{\pm}1.17\;mmol\;m^{-2}day^{-1}$, indicating that this area acted as a sink for $CO_2$.