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Dr. Jin-Yi Yu
Professor
Department of Earth System Science
School of Physical Sciences
University of California, Irvine


Ph.D., Atmospheric Sciences, Univ. of Washington


Mailing Address:
Department of Earth System Science
3315 Croul Hall
University of California at Irvine
Irvine, CA 92697-3100
TEL: (949) 824-3878
EMAIL: jyyu@uci.edu

      

COURSE

  • ESS 5: The Atmosphere
  • ESS 11: Climate Change and Policy
  • ESS 55: Earth's Atmosphere
  • ESS 101C: Earth System Change
  • ESS 124: Weather Analysis
  • ESS 220: Earth System Climatology
  • ESS 228: Geophys Fluid Dynamics
  • ESS 210B: Geoscience Data Analysis

RESEARCH


SST Animations for CP and EP El Nino Events (under construction)
Animations of SST anomalies are displayed and contratsed for Eastern-Pacific (EP) type and Central-Pacific (CP) type of El Nio and La Nina events. [more]

Two Types of El Nino: Central-Pacific El Nino and Eastern-Pacific El Nino
There are two types of El Nino/La Nina: an eastern-Pacific (EP) type and a central-Pacific (CP) type. The CP and EP El Nino/La Nina have different patterns, evolution, teleconnections, and generation mechanisms.... [more]

A New Global Parallel and Coupled Ocean-Atmosphere GCM
A new global, high-resolution, and parallel coupled atmosphere-ocean GCM has been developed under a joint project between UC and Los Alamos National Laboratory. ... [more]
View QuickTime or AVI animations of SST in year 8 and 9.

ENSO Simulation, Dynamics, and Prediction
The CGCM Developed by Prof. Yu is one of the models able to produce ENSO-like climate variability with reasonable frequency and amplitude. ...[more]
View the simulated ENSO cycle here.

ENSO-Monsoon Interactions
Our investigations focus on how the mutual influences of ENSO and Asian Monsoon are established and how the Indian Ocean might affect these influences. ... [more]

Indian Ocean Zonal Mode
We are able to simulate the Indian Ocean zonal mode (IOZM) in CGCM integrations with and without ENSO events in the Pacific. The generation mechanism of IOZM and its relationship with ENSO are studied. ... [more]

Pacific Decadal Oscillation (PDO)
Pacific Decadal Oscillation (PDO) is believed to contribute to the decadal changes in ENSO activity. We study PDO's generation and modulation mechanisms using CGCM simulations. ... [more]

Tropical Instability Waves (TIW)
Both CGCM simulations and satellite observations are used to study the seasonal and interannual variations of Tropical Instability Waves (TIWs) and their coupling with the atmosphere. ... [more]

Tropical-Extratropical Interactions
Evidence is presented that ENSO in the tropics can force a anomaly SST dipole off the coast of the California through surface heat flux. ... [more]

Cloud-Radiation Feedback
Impacts of high-level clouds and marine boundary layer stratus on tropical atmosphere-ocean system are demonstrated with CGCM experiments. ...[more]

Jetstream and Stormtrack Vacillation
A slow vacillation of jetstram/stormtrack location and strength is shown to be self-maintained by the interactions with the embedded baroclinic waves. ...[more]

Regional Climate Variations
We investigate the roles of oceanic influence, land-surface memory, and internal atmospheric dynamics in forcing interannual variability of North American Monsoon and the associated continental-scale precipitation mode. ...[more]

Central America Gap Wind and Eastern Pacific Warm Pool
The mechanical and thermal impacts of Central America gap winds on the annual cycle of sea surface temperature in the eastern Pacific warm pool are examined with observations and a series of regional ocean model experiments. ...[more]

SELECTED PUBLICATIONS

  • (2014) Sheffield, J., and others: Regional climate processes and projections in CMIP3 and CMIP5 for N. America: Differences, attribution and outstanding issues. NOAA Technical Report OAR CPO-2
  • (2014) Qian, C., J.-Y. Yu, G. Chen: Decadal Summer Drought Frequency in China: The increasing influence of the Atlantic Multi-decadal Oscillation, Environmental Research Letters, Vol. 9, No. 12. (01 December 2014), 124004, doi:10.1088/1748-9326/9/12/124004. [PDF]
  • (2014) Yu, J-Y, P-K Kao, H Paek, H-H Hsu, C-W Hung, M-M Lu, S-I An: Linking Emergence of the Central-Pacific El Nino to the Atlantic Multi-decadal Oscillation, Journal of Climate, doi: 10.1175/JCLI-D-14-00347.1.
  • (2014) Zheng, Fei, X.-H. Fang, J.-Y. Yu, and J. Zhu: Asymmetry of the Bjerknes Positive Feedback between the Two Types of El Nino, Geophysical Research Letters, 41, 7651-7657, doi:10.1002/2014GL062125. [PDF]
  • (2014) Capotondi, A., A. T. Wittenberg, M. Newman, E. Di Lorenzo, J.-Y. Yu, P. Braconnot, J. Cole, B. Dewitte, B. Giese, E. Guilyardi, F.-F. Jin, K. Karnauskas, B. Kirtman, T. Lee, N. Schneider, Y. Xue, S.-W. Yeh: Understanding ENSO diversity, Bulletin of the American Meteorological Society, doi: http://dx.doi.org/10.1175/BAMS-D-13-00117.1.
  • (2014) Lin, C.-Y., J.-Y. Yu, and H. H. Hsu: CMIP5 model simulations of the Pacific meridional mode and its connection to the two types of ENSO, International Journal of Climatology, DOI: 10.1002/joc.4130. [PDF]
  • (2014) Ma, T. and J.-Y. Yu: Linking Centennial Surface Warming Patterns in the Equatorial Pacific to the Relative Strengths of the Walker and Hadley Circulations, Journal of Atmospheric Sciences, 71, 3454-3464, doi: 10.1175/JAS-D-14-0028.1. [PDF]
  • (2014) Qu, T. and J.-Y. Yu: ENSO Indices from Sea Surface Salinity Observed by Aquarius and Argo, Journal of Oceanography, 70, 367-375, DOI 10.1007/s10872-014-0238-4. [PDF]
  • (2014) Ma, T. and J.-Y. Yu: Paradox in South Asian summer monsoon circulation change: Lower tropospheric strengthening and upper tropospheric weakening, Geophysical Research Letters, DOI: 10.1002/2014GL059891. [PDF]
  • (2014) Zou, Y., J.-Y. Yu, T. Lee, M.-M. Lu, and S. T. Kim: CMIP5 Model Simulations of the Impacts of the Two Types of El Nino on US Winter Temperature, Journal of Geophysical Research, DOI: 10.1002/2013JD021064. [PDF]
  • (2014) Liang, Y.-C., M.-H. Lo, and J.-Y. Yu: Asymmetric Responses of Land Hydroclimatology to Two Types of El Nino in the Mississippi River Basin, Geophysical Research Letters, 41, 582-588, doi:10.1002/2013GL058828. [PDF]
  • (2013) Yu, J.-Y. and B. S. Giese: ENSO diversity in observations, U.S. CLIVAR Variations, Vol. 11, No. 2, 1-5.[PDF]
  • (2013) de Linage, C., H. Kim , J. Famiglietti and ,J.-Y Yu: Impact of Pacific and Atlantic sea surface temperatures on interannual and decadal variations of GRACE land water storage in Tropical South America, Journal of Geophysical Research, 118, 10,811-10,829.
  • (2013) Kim, S. T., W. Cai, F.-F. Jin, and J.-Y. Yu: ENSO Stability in Coupled Climate Models and its Association with Mean State, Climate Dynamics, DOI 10.1007/s00382-013-1833-6.
  • (2013) Yu, J.-Y. and Y. Zou: The enhanced drying effect of Central-Pacific El Nino on US winter, Environmental Research Letters, 8, doi:10.1088/1748-9326/8/1/014019. [PDF]
  • (2013) Sheffield, J. and co-authors: North American Climate in CMIP5 Experiments. Part II: Evaluation of 20th Century Intra-Seasonal to Decadal Variability, Journal of Climate, 23, 9247-9290.[PDF]
  • (2013) A Capotondi, B Kirtman, A Wittenberg, M Newman, N Schneider, Y Xue, B Giese, P Braconnot, J Cole, B Dewitte, E Guilyardi, F-F Jin, T Lee, K Karnauskas, S-W Yeh, J-Y Yu: U.S. CLIVAR ENSO Diversity Workshop Report, U.S. CLIVAR: Climate Variability and Predictability, Report No. 2013-1, 23pp. [PDF]
  • (2013) Choi, J., S.-I. An, S.-W. Yeh, and J.-Y. Yu: ENSO-like and ENSO-induced Tropical Pacific Decadal Variability in CGCMs, Journal of Climate, 26, 1485-1501.
  • (2013) Yu., J.-Y. and S. T. Kim: Identifying the Types of Major El Nino Events since 1870, International Journal of Climatology, 33, 2105-2112. DOI: 10.1002/joc.3575. [PDF]
  • (2012) Yu., J.-Y., M.-M. Lu, and S. T. Kim: A change in the relationship between tropical central Pacific SST variability and the extratropical atmosphere around 1990, Environmental Research Letters, 7, doi:10.1088/1748-9326/7/3/034025. [PDF]* highlighted in EnvironmentalResearchWeb
  • (2012) Wang, C., C. Deser, J.-Y. Yu, P. DiNezio, and A. Clement: El Nino and Southern Oscillation (ENSO): A Review, A Chapter for Springer Book: Coral Reefs of the Eastern Pacific, In Press.
  • (2012) Yu., J.-Y., Y. Zou, S. T. Kim, and T. Lee: The Changing Impact of El Nino on US Winter Temperatures, Geophysical Research Letters, doi:10.1029/2012GL052483. [PDF]
  • (2012) Kim, S. T. and J.-Y. Yu: The Two Types of ENSO in CMIP5 Models, Geophysical Research Letters, 39, L11704, doi:10.1029/2012GL052006. [PDF]
  • (2012) Kim, S. T., J.-Y. Yu, A. Kumar, and H. Wang: Examination of the Two Types of ENSO in the NCEP CFS Model and Its Extratropical Associations, Monthly Weather Review, 140, 1908-1923. [PDF]
  • (2012) Kim, S. T., J.-Y. Yu, and M.-M. Lu: Distinct Behaviors of Pacific and Indian Ocean Warm Pool Properties on Seasonal and Interannual Timescales, Journal of Geophysical Research, 117, D05128, doi:10.1029/2011JD016557. [PDF]
  • (2011) Yu, J.-Y. and S. T. Kim: Reversed Spatial Asymmetries between El Nino and La Nina and their Linkage to Decadal ENSO Modulation in CMIP3 Models, Journal of Climate, 24, 5423-5434. [PDF]
  • (2011) Yu., J.-Y. and S. T. Kim: Relationships between Extratropical Sea Level Pressure Variations and the Central-Pacific and Eastern-Pacific Types of ENSO, Journal of Climate, 24, 708-720. [PDF]
  • (2011) Yu., J.-Y., H.-Y. Kao, T. Lee, and S. T. Kim: Subsurface Ocean Temperature Indices for Central-Pacific and Eastern-Pacific Types of El Nino and La Nina Events. Theoretical and Applied Climatology, 103, 337-344, DOI: 10.1007/s00704-010-0307-6. [PDF]
  • (2010) Yu., J.-Y., H.-Y. Kao and T. Lee: Subtropics-Related Interannual Sea Surface Temperature Variability in the Equatorial Central Pacific. Journal of Climate, 23, 2869-2884. [PDF]
  • (2010) Yu., J.-Y. and S. T. Kim: Identification of Central-Pacific and Eastern-Pacific Types of ENSO in CMIP3 Models, Geophysical Research Letters, 37, L15705, doi:10.1029/2010GL044082. [PDF]
  • (2010) Yu., J.-Y. and S. T. Kim: Three Evolution Patterns of Central-Pacific El Nino, Geophysical Research Letters, 37, L08706, doi:10.1029/2010GL042810. [PDF]* highlighted in "Editors' Highlight" and Eos's "Research Spotlight"
  • (2010) Weng, S.-P. and J.-Y. Yu: Impacts of Pacific and Indian Ocean Coupling on Wintertime Tropical Intraseasonal Oscillation: A Basin-Coupling CGCM Study. International Journal of Climatology, 30, 359-371. [PDF]
  • (2010) Weng, S.-P. and J.-Y. Yu: A CGCM study on the northward propagation of tropical intraseasonal oscillation over the Asian summer monsoon regions. Journal of Terrestrial, Atmospheric and Oceanic Sciences, 21, 299-312. [PDF]
  • (2009) Kao, H.-Y. and J.-Y. Yu: Contrasting Eastern-Pacific and Central-Pacific Types of ENSO. Journal of Climate, 22, 615-632. [PDF]
  • (2009) Yu., J.-Y., F. Sun, and H.-Y. Kao: Contributions of Indian Ocean and Monsoon Biases to the Excessive Biennial ENSO in CCSM3. Journal of Climate, 22, 1850-1858. [PDF]
  • (2009) Sun, F. and J.-Y. Yu: A 10-15year Modulation Cycle of ENSO Intensity. Journal of Climate, 22, 1718-1735. [PDF]
  • (2008) Yu, J.-Y.: Understanding El Nino Southern Oscillation and its interactions with the Indian Ocean and monsoon. Book chapter in Recent Progress in Atmospheric Sciences with Applications to the Asia-Pacific Region, Liou, K N and Chou, M D (Ed.), World Scientific Publishing, Singapore, 3-22. [PDF]
  • (2007) Yu, J.-Y. and Matthew A. Janiga: Changes in the In-Phase Relationship Between the Indian and Subsequent Australian Summer Monsoons During the Past Five Decades. Annales Geophysicae, 25, 1929-1933. [PDF]
  • (2007) Yu, J.-Y. and H.-Y. Kao: Decadal Changes of ENSO Persistence Barrier in SST and Ocean Heat Content Indices: 1958-2001. Journal of Geophysical Research, 112, D13106, doi:10.1029/2006JD007654. [PDF]
  • (2006) Sun, F. and J.-Y. Yu: Impacts of Central America gap winds on the SST annual cycle in the eastern Pacific warm pool. Geophysical Research Letters, 33, L06710, doi:10.1029/2005GL024700. [PDF]
  • (2005) Yu, J.-Y. : Enhancement of ENSO's persistence barrier by biennial variability in a coupled atmosphere-ocean general circulation model. Geophysical Research Letters, 32, L13707, doi:10.1029/2005GL023406. [PDF]
  • (2004) Yu, J.-Y. and K. M. Lau: Contrasting Indian Ocean SST variability with and without ENSO influence: A coupled atmosphere-ocean GCM study. Meteorology and Atmospheric Physics, DOI: 10.1007/s00703-004-0094-7. [PDF]
  • (2003) Yu, J.-Y. and W. T. Liu: A linear relationship between ENSO intensity and tropical instability wave activity in the eastern Pacific Ocean. Geophysical Research Letters, 30(14), 1735, doi:10.1029/2003GL017176. [PDF]
  • (2003) Yu., J.-Y., S.-P. Weng, and J. D. Farrara: Ocean Roles in the TBO Transitions of the Indian-Australian Monsoon System. Journal of Climate, 16, 3072-3080. [PDF]
  • (2003) Yu., J.-Y.: Identifications and applications of coupled climate models. Invited article in The Encyclopedia of Life Support Systems, Ed. Achim Sydow, EOLSS Publisher, Oxford, UK, 15pp. [PDF]
  • (2003) Farrara, J. D. and J.-Y. Yu: Interannual variations in the North American monsoon and SST anomalies: A general circulation model study. Journal of Climate, 16, 1703-1720. [PDF]
  • (2003) C. R. Mechoso, J. D. Neelin, and J.-Y. Yu: Testing simple model of ENSO, Journal of Atmospheric Sciences, 60, 305-318. [PDF]
  • (2002) Yu, J.-Y. , C. R. Mechoso, J. C. McWilliams, and A. Arakawa: Impacts of the Indian Ocean on the ENSO cycle. Geophysical Research Letters, 29(8), 1204, doi:10.1029/2001GL014098. [PDF]
  • (2002) Davey, M. K., M. Huddleston, K.R. Sperber, S.B. Power, R.A. Colman, G. Flato, M. Kimoto, L. Terray, D. DeWitt, E. Roeckner, J. Oberhuber, R. Voss, U. Cubasch, T.R. Knutson, S. Manabe, B. Wang, L. Fairhead, H. Le Treut, A. Vintzileos, P. Delecluse, P. Braconnot, I. Yoshikawa, D. Chen, S.E. Zebiak, C. Gordon, C. Cooper, M. Latif, S. Yukimoto, A. Kitoh, F. Bryan, G.A. Meehl, W.M. Washington, M. Ji, T. Hogan, T. Li, J.-Y. Yu, C. R. Mechoso: STOIC: A study of coupled GCM climatology and variability in tropical ocean regions. Climate Dynamics, 18, 403-420.
  • (2001) Yu., J.-Y. and C.R. Mechoso: A coupled atmosphere-ocean GCM study of the ENSO cycle. Journal of Climate, 14, 2329-2350. [PDF]
  • (2001) Latif, M. K. Sperber, A. Arblaster, P. Braccanot, D. Chen, A. Colman, U. Cubasch, M. Davey, P. Delecleuse, D. De Witt, L. Fairhead, G. Flato, M. Ji, M. Kimoto, A. Kitoh, T. Knutson, H. Le Treut, S. Manabe, O. Marti, C. Mechoso, G. Meehl, J. Oberhuber, S. Power, E. Roeckner, L. Terray, A. Vintzileos, R. Vob, B. Wang, W. Washington, I. Yoshikawa, J.-Y. Yu, S. Zebiak: ENSIP: The El Nino Simulation Intercomparison Project. Climate Dynamics, 18, 255-276.
  • (2001) Yu., J.-Y. and R. C. Malone: A Global High-Resolution UCLA-POP Coupled Atmosphere-Ocean GCM for Assessing Climate and Variability in the Ocean. Proceedings of the Symposium on Climate Variability, the Ocean, and Social Impacts, 14-18 January 2001, Albuquerque, New Mexico, 160-162.
  • (2000) Yu., J.-Y., W. T. Liu, and C.R. Mechoso: The SST anomaly dipole in the Northern Subtropical Pacific and its relationship with ENSO. Geophysical Research Letters, 27, 1931-1934. [PDF]
  • (2000) Yu., J.-Y.: A general circulation model of the atmosphere using the full-Galerkin method. Journal of Mathematics and Computers in Simulation, 52, 427-443. [PDF]
  • (2000) Mechoso, C. R., J.-Y. Yu, and A. Arakawa: A coupled GCM pilgrimage: From climate catastrophe to ENSO simulations. Book Chapter in General Circulation Model Development: Past, Present, and Future., D. A. Randall, Eds., Academic Press, 539-575.
  • (2000) Mechoso, C. R., J. D. Farrara, L.A. Drummond, J. Spahr and J.-Y. Yu: An atmosphere-ocean model: Code optimization and application to El Nino. Book Chapter in Development and Application of Computer Techniques to Environmental Studies VIII., D. A. Gabriel Ibarra-Berastegi, C. A. Brebbia and P. Zanetti, Eds, WIT Press, Southampton, Boston, 261-278.
  • (1999) Yu., J.-Y., and C.R. Mechoso: Links between annual variations of Peruvian stratocumulus clouds and of SSTs in the eastern equatorial Pacific. Journal of Climate, 12, 3305-3318. [PDF]
  • (1999) Yu., J.-Y., and C.R. Mechoso: A discussion on the errors in the surface heat fluxes simulated by a coupled GCM. Journal of Climate, 12, 416-426. [PDF]
  • (1997) Yu., J.-Y., C. R. Mechoso, J. D. Farrara, Y.-J. Kim, J.-L. Li, M. Kohler, and A. Arakawa: Recent development of the UCLA coupled atmosphere-ocean GCM. Research Activities in Atmospheric and Oceanic Modelling. A. Staniforth, ed., WMO/TD-No. 792, 9.24-9.25.
  • (1995) Yu, J.-Y., and D. L. Hartmann: Orographic influences on the distribution and generation of atmospheric variability in a GCM. Journal of Atmospheric Sciences, 52, 2428-2443. [PDF]
  • (1993) Yu, J.-Y., and D. L. Hartmann: Zonal flow vacillation and eddy forcing in a simple GCM of the atmosphereJournal of Atmospheric Sciences, 50, 3244-3259. [PDF]


[home]  [Publications]  [CP-ENSO]  [New CGCM]  [ENSO]  [Monsoon]  [Indian Dipole]  [PDO]  [TIW]  [Tropics-Extratropics]  [Cloud]  [Jetstream]  [Regional] [Gap Wind]