Advanced Search
Article Contents

Regime Shifts in the North Pacific Simulated by a COADS-driven Isopycnal Model


doi: 10.1007/BF02915399

  • The Miami Isopycnal Coordinate Ocean Model (MICOM) is adopted to simulate the interdecadalvariability in the Pacific Ocean with most emphasis on regime shifts in the North Pacific. The compu-tational domain covers 60°N to 40°S with an enclosed boundary condition for momentum flux, whereasthere are thermohaline fluxes across the southern end as a restoring term. In addition, sea surface salinityof the model relaxes to the climatological season cycle, which results in climatological fresh water fluxes.Surface forcing functions from January 1945 through December 1993 are derived from the ComprehensiveOcean and Atmospheric Data Set (COADS). Such a numerical experiment reproduces the observed evo-lution of the interdecadal variability in the heat content over the upper 400-m layer by a two-year lag.Subduction that occurs at the ventilated thermocline in the central North Pacific is also been simulatedand the subducted signals propagate from 35°N to 25°N, taking about 8 to 10 years, in agreement with theeXpendable Bathy Thermograph observation over recent decades. Interdecadal signals take a southwest-ward and downward path rather than westward propagation, meaning they are less associated with thebaroclinic planetary waves. During travel, the signals appear to conserve potential vorticity. Therefore,the ventilated thermocline and related subduction are probably the fundamental physics for interdecadalvariability in the mid-latitude subtropics of the North Pacific.
  • [1] LIU Qinyu, WEN Na, YU Yongqiang, 2006: The Role of the Kuroshio in the Winter North Pacific Ocean-Atmosphere Interaction: Comparison of a Coupled Model and Observations, ADVANCES IN ATMOSPHERIC SCIENCES, 23, 181-189.  doi: 10.1007/s00376-006-0181-4
    [2] LIU Qinyan, WANG Dongxiao, ZHOU Wen, XIE Qiang, ZHANG Yan, 2010: Covariation of the Indonesian Throughflow and South China Sea Throughflow Associated with the 1976/77 Regime Shift, ADVANCES IN ATMOSPHERIC SCIENCES, 27, 87-94.  doi: 10.1007/s00376-009-8061-3
    [3] Wu Renguang, Chen Lieting, 1995: Interannual Fluctuations of Surface Air Temperature over North America and Its Relationship to the North Pacific SST Anomaly, ADVANCES IN ATMOSPHERIC SCIENCES, 12, 20-28.  doi: 10.1007/BF02661284
    [4] Xiang LI, Yiyong LUO, 2016: Response of North Pacific Eastern Subtropical Mode Water to Greenhouse Gas Versus Aerosol Forcing, ADVANCES IN ATMOSPHERIC SCIENCES, 33, 522-532.  doi: 10.1007/s00376-015-5092-9
    [5] Guanghui ZHOU, Rong-Hua ZHANG, 2022: Structure and Evolution of Decadal Spiciness Variability in the North Pacific during 2004–20, Revealed from Argo Observations, ADVANCES IN ATMOSPHERIC SCIENCES, 39, 953-966.  doi: 10.1007/s00376-021-1358-6
    [6] LI Chongyin, XIAN Peng, 2003: Atmospheric Anomalies Related to Interdecadal Variability of SST in the North Pacific, ADVANCES IN ATMOSPHERIC SCIENCES, 20, 859-874.  doi: 10.1007/BF02915510
    [7] Yao HA, Zhong ZHONG, Haikun ZHAO, Yimin ZHU, Yao YAO, Yijia HU, 2022: A Climatological Perspective on Extratropical Synoptic-Scale Transient Eddy Activity Response to Western Pacific Tropical Cyclones, ADVANCES IN ATMOSPHERIC SCIENCES, 39, 333-343.  doi: 10.1007/s00376-021-0375-9
    [8] WEI Ke, CHEN Wen, 2011: An Abrupt Increase in the Summer High Temperature Extreme Days across China in the mid-1990s, ADVANCES IN ATMOSPHERIC SCIENCES, 28, 1023-1029.  doi: 10.1007/s00376-010-0080-6
    [9] ZHU Yali, WANG Huijun, 2010: The Relationship between the Aleutian Low and the Australian Summer Monsoon at Interannual Time Scales, ADVANCES IN ATMOSPHERIC SCIENCES, 27, 177-184.  doi: 10.1007/s00376-009-8144-1
    [10] James E. OVERLAND, Muyin WANG, Thomas J. BALLINGER, 2018: Recent Increased Warming of the Alaskan Marine Arctic Due to Midlatitude Linkages, ADVANCES IN ATMOSPHERIC SCIENCES, 35, 75-84.  doi: 10.1007/s00376-017-7026-1
    [11] WU Fanghua, LIN Pengfei, LIU Hailong, 2012: Influence of a Southern Shift of the ITCZ from Quick Scatterometer Data on the Pacific North Equatorial Countercurrent, ADVANCES IN ATMOSPHERIC SCIENCES, 29, 1292-1304.  doi: 10.1007/s00376-012-1149-1
    [12] Ting CHEN, Shumin CHEN, Mingsen ZHOU, Chaoyong TU, Aoqi ZHANG, Yilun CHEN, Weibiao LI, 2022: Northward Shift in Landfall Locations of Tropical Cyclones over the Western North Pacific during the Last Four Decades, ADVANCES IN ATMOSPHERIC SCIENCES, 39, 304-319.  doi: 10.1007/s00376-021-1077-z
    [13] Masafumi Kamachi, Tsurane Kuragano, Noriya Yoshioka, Jiang Zhu, Francesco Uboldi, 2001: Assimilation of Satellite Altimetry into a Western North Pacific Operational Model, ADVANCES IN ATMOSPHERIC SCIENCES, 18, 767-786.
    [14] QIAN Weihong, HU Haoran, 2006: Interannual Thermocline Signals and El Ni?no-La Ni?na Turnabout in the Tropical Pacific Ocean, ADVANCES IN ATMOSPHERIC SCIENCES, 23, 1003-1019.  doi: 10.1007/s00376-006-1003-4
    [15] Liwei ZOU, Tianjun ZHOU, Jianping TANG, Hailong LIU, 2020: Introduction to the Regional Coupled Model WRF4-LICOM: Performance and Model Intercomparison over the Western North Pacific, ADVANCES IN ATMOSPHERIC SCIENCES, 37, 800-816.  doi: 10.1007/s00376-020-9268-6
    [16] Chang-Hoi HO, Joo-Hong KIM, Hyeong-Seog KIM, Woosuk CHOI, Min-Hee LEE, Hee-Dong YOO, Tae-Ryong KIM, Sangwook PARK, 2013: Technical Note on a Track-pattern-based Model for Predicting Seasonal Tropical Cyclone Activity over the Western North Pacific, ADVANCES IN ATMOSPHERIC SCIENCES, 30, 1260-1274.  doi: 10.1007/s00376-013-2237-6
    [17] GAO Wenhua, SUI Chung-Hsiung, 2013: A Modeling Analysis of Rainfall and Water Cycle by the Cloud-resolving WRF Model over the Western North Pacific, ADVANCES IN ATMOSPHERIC SCIENCES, 30, 1695-1711.  doi: 10.1007/s00376-013-2288-8
    [18] SUN Jianqi, YUAN Wei, 2009: Contribution of the Sea Surface Temperature over the Mediterranean-Black Sea to the Decadal Shift of the Summer North Atlantic Oscillation, ADVANCES IN ATMOSPHERIC SCIENCES, 26, 717-726.  doi: 10.1007/s00376-009-8210-8
    [19] Zhou Tianjun, Yu Rucong, Li Zhaoxin, 2002: ENSO-Dependent and ENSO-Independent Variability over the Mid-Latitude North Pacific: Observation and Air-Sea Coupled Model Simulation, ADVANCES IN ATMOSPHERIC SCIENCES, 19, 1127-1147.  doi: 10.1007/s00376-002-0070-4
    [20] HUANG Ping, WANG Pengfei, HU Kaiming, HUANG Gang, ZHANG Zhihua, LIU Yong, YAN Bangliang, 2014: An Introduction to the Integrated Climate Model of the Center for Monsoon System Research and Its Simulated Influence of El Nio on East Asian-Western North Pacific Climate, ADVANCES IN ATMOSPHERIC SCIENCES, 31, 1136-1146.  doi: 10.1007/s00376-014-3233-1

Get Citation+

Export:  

Share Article

Manuscript History

Manuscript received: 10 September 2003
Manuscript revised: 10 September 2003
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索

Regime Shifts in the North Pacific Simulated by a COADS-driven Isopycnal Model

  • 1. LED, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301;Guangzhou Institute of Tropical Ocean and Meteorology, CMA, Guangzhou 510080,International Arctic Research Center, University of Alaska Fairbanks, Alaska 99775-7340, USA,Department of Atmospheric and Oceanic Sciences, University of Wisconsin-Madison, Wisconsin 53706-1695, USA,Department of Atmospheric and Oceanic Sciences, University of Wisconsin-Madison, Wisconsin 53706-1695, USA

Abstract: The Miami Isopycnal Coordinate Ocean Model (MICOM) is adopted to simulate the interdecadalvariability in the Pacific Ocean with most emphasis on regime shifts in the North Pacific. The compu-tational domain covers 60°N to 40°S with an enclosed boundary condition for momentum flux, whereasthere are thermohaline fluxes across the southern end as a restoring term. In addition, sea surface salinityof the model relaxes to the climatological season cycle, which results in climatological fresh water fluxes.Surface forcing functions from January 1945 through December 1993 are derived from the ComprehensiveOcean and Atmospheric Data Set (COADS). Such a numerical experiment reproduces the observed evo-lution of the interdecadal variability in the heat content over the upper 400-m layer by a two-year lag.Subduction that occurs at the ventilated thermocline in the central North Pacific is also been simulatedand the subducted signals propagate from 35°N to 25°N, taking about 8 to 10 years, in agreement with theeXpendable Bathy Thermograph observation over recent decades. Interdecadal signals take a southwest-ward and downward path rather than westward propagation, meaning they are less associated with thebaroclinic planetary waves. During travel, the signals appear to conserve potential vorticity. Therefore,the ventilated thermocline and related subduction are probably the fundamental physics for interdecadalvariability in the mid-latitude subtropics of the North Pacific.

Catalog

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return