My research interests are in the following areas:
island effects on
weather and climate over the Hawaiian islands and adjacent waters from
data analyses and numerical modeling including summer trade-wind
weather, high-wind and heavy-rainfall events and regional climate.
The daily high resolution model output are also used for other
applications including evaluating fire danger and planning for
wildfire mitigation and suppression over the Hawaiian islands.
I am also studying the processess related heavy rainfall over
Taiwan and southern China during the early summer rainy season.
Heavy rainfall problems of Taiwan and the Hawaiian Islands
are similar. They both are in a subtropical flow regime with
orographic influences.
Stopa, J. E., J.-F. Filipot, N. Li, K. F. Cheung, Y.-L. Chen, and L. Vega, 2013: Wave energy resources along the Hawaiian Island chain. Renewable Energy., 55, 305-321.(pdf
file)
Chen, C.-Y., Y.-L. Chen, C.-S. Chen, P.-L. Lin, and C.-L. Liu, 2012: A revisit of a heavy rainfall event over northern Taiwan during the 1984 Mei-Yu Season. TAO. (Accepted with minor revisions)
Tu, C.-C., Y.-L. Chen, C.-S. Chen, P.-L. Lin and P.-H. Lin, 2012: A
comparison of rainfall distributions between two heavy rain periods
during terrain-influenced monsoon rainfall experiment (TiMREX) 2008.Mon. Wea. Rev. (In Review).
Xu, W., E. J. Zipser, Y.-L. Chen, C. Liu, .-C. Liou, W.-C. Lee and B.
Jou, 2012 :An orography-associated extreme rainfall event during
TiMREX: triggering, storm evolution, and maintenance. Mon. Wea. Rev., 140, 2555–2574.
Jayawardena, S., Y.-L. Chen, A.J.Nash and K. Kodama, 2012: A
comparison of three prolonged periods of heavy rainfall over the
Hawaiian islands. J. Appl. Meteor. and Climate, 51, 722-744.
Stopa, J. E., K. F. Cheung , Y.-L. Chen, 2011: Assessment of wave energy resources in
Hawaii. J. Renewable Energy., 36, 554-567.
Lin, P.-L., Y.-L. Chen, C.-S. Chen, C.-L. Liu, and C.-Y. Chen, 2011: Numerical experiments investigating the orographic effects on a heavy rainfall event over the northwestern coast of Taiwan during TAMEX IOP 13.
Meteorol Atmos Phys, 114, 35-50.
Tu, C.-C., and Y.-L. Chen, 2011: Favorable conditions for the development of a heavy rainfall event over Oahu during the
2006 wet period . Wea. Forecasting , 26, 280-300.
Nguyen, H. V., and Y.-L. Chen, 2011: High resolution initialization and
simulations of typhoon Morakot (2009). Mon. Wea. Rev., 139, 1463-1491
Hartley, T. and Y.-L. Chen, 2010: Characteritics of summer trade-wind rainfall over Oahu.
Wea. Forecasting,
25, 1797-1815.(pdf
file)
Carlis, D., L., Y.-L. Chen, and V. Morris, 2010: Numerical simulations of island-scale airflow and the Maui vortex
during summer trade-wind conditions. Mon. Wea. Rev.138,
2706-2736. (pdf file)
Nguyen, H. V., Y.-L. Chen, and F. Fujioka, 2010: Numerical Simulations of island effects on airflow and weather during the summer over the Island of Oahu.
Mon. Wea. Rev.138, 2253–2280. (pdf
file)
Kerns, B., Y.-L. Chen and M.-Y. Chang 2010: The diurnal cycle of winds, rain and clouds over Taiwan during the Mei-Yu, Summer, and Autumn regimes.
Mon. Wea. Rev.138, 497-516. (pdf
file)
Chen, C.-S., Y.-L. Chen, P.-C. Lin, P.-L. Lin, C.-L. Liu, C.-J. Su, and W.-C. Peng, 2008: An investigation of extremely heavy rainfall events over southwestern Taiwan during the Mei-Yu season from 1997-2006.
Atmos. Sci., 35, 287-304 (In Mandarin with English Abstract). (Available from Meteor. Soc. of the Rep. of China, 64 Kung-Yuan Road, Taipei, Taiwan)
Yang, Y., Y.-L. Chen, and F. M. Fujioka, 2008: Effects of trade-wind
strength and direction on the leeside circulations and rainfall of the Island
of Hawaii. Mon. Wea. Rev.136, 4799-4818.
Yang, Y., and Y.-L. Chen, 2008: Effects of terrain heights and sizes on
island-scale circulations and rainfall for the island of Hawaii during HaRP. Mon. Wea. Rev.136, 120-146. (pdf
file)
Esteban, M. A., and Y.-L. Chen, 2008: The Impact of Trade-wind Strength on
Precipitation over the Windward Side of the Island of Hawaii. Mon. Wea. Rev.136, 913-928. (pdf
file)
Chen, C.-S., Y.-L. Chen, W.-C. Chen, and P.-L. Lin, 2007: The Statistics
of Heavy Rainfall Occurrences in Taiwan. Wea. Forecasting.22,
981-1002. (pdf
file)
Zhang, Y., Y.-L. Chen, and K. Kodama, 2005: Validation of the coupled
NCEP Mesoscale Spectral Model and an advanced Land Surface Model over
the Hawaiian Islands. Part II: A high wind event. Wea. Forecasting, 20, 873-895.
Zhang, Y., Y.-L. Chen, S.-Y. Hong, H.-M. H. Juang, and K. Kodama, 2005:
Validation of the coupled NCEP Mesoscale Spectral Model and an advanced
Land Surface Model over the Hawaiian Islands. Part I: Summer trade wind
conditions and a heavy rainfall event. Wea. Forecasting, 20, 847-872.
Zhang, Y., Y.-L. Chen, T. A. Schroeder, and K. Kodama, 2005: Numerical
simulations of sea breeze circulations over northwest Hawaii.
Wea. Forecasting, 20, 827-846.
Yang, Y., Y.-L. Chen, and F. M. Fujioka, 2005: Numerical simulations of
the island-induced circulation over the island of Hawaii during HaRP. Mon. Wea. Rev.133, 3693-3713. (pdf
file)
Juang, H.-M. H., C.-T. Lee, Y. Zhang, M.-C. Wu, Y.-L. Chen, K. Kodama,
and S.-C. Chen, 2005: Applying horizontal diffusion on pressure surface
to mesocale models on terrain-following coordinates. Mon. Wea. Rev.,
133, 1384-1402.
Chen, C.-S., W.-C. Chen, Y.-L. Chen, P.-L. Lin, and S.-J. Lai, 2004: An
investigation of orographic effects on two heavy rainfall events over
southwestern Taiwan during the Mei-Yu season. Atmos. Res.,
73/1-2,101-130.
Foster, J., M. Bevis, Y.-L. Chen, S. Businger, and Y. Zhang, 2003: The
Ka'u Storm (Nov 2000): Imaging precipitable water using GPS. J.
Geophys. Res., 108, D18, 4585.
Yang, Y., and Y.-L. Chen, 2003: Circulations and rainfall on the lee side
of the island of Hawaii during HaRP. Mon. Wea. Rev., 131, 2525-2542.
Chen, C.-S., and Y.-L. Chen, 2003: The rainfall characteristics
of Taiwan. Mon. Wea. Rev., 131, 1323-1341.
Yeh, H.-C., and Y.-L. Chen, 2003: Numerical simulations of the barrier
jet over northwestern Taiwan during the Mei-Yu season. Mon. Wea. Rev.,
131, 1396-1407.
Yeh, H.-C., and Y.-L. Chen, 2002: The role of offshore convergence on
coastal rainfall during TAMEX IOP 3. Mon. Wea. Rev.,
130, 2709-2730.
Chen, X., and Y.-L. Chen, 2002: Kinetic energy budgets of the low-level
jet during TAMEX IOP 5. J. Meteor. Soc. Japan, 80, 1-19.
Frye, J., and Y.-L. Chen, 2001: Evolution of downslope flow under
strong opposing trade winds and frequent trade-wind rainshowers over
the island of Hawaii. Mon. Wea. Rev., 129, 956-977
Chen, Y.-L., and J. Feng, 2001: Numerical simulations of airflow and
cloud distributions over the windward side of the island of Hawaii.
Part I: The effects of trade-wind inversion. Mon. Wea. Rev.,
129, 1117-1134.
Feng, J., and Y.-L. Chen, 2001: Numerical simulations of airflow and
cloud distributions over the windward side of the island of Hawaii.
Part II: Nocturnal flow regime. Mon. Wea. Rev., 129,
1135-1147.
Teng, J.-H., C.-S. Chen, T.-C. C. Wang, and Y.-L. Chen, 2000:
Orographic effects on a squall-line system. Mon. Wea. Rev.,
128, 495-506.
Chen, Y.-L., and S.-F. Tseng, 2000: Comments on "The intensification
of the low-level jet during the development of mesoscale convective
systems on a Mei-Yu front". Mon. Wea. Rev., 128, 1123-1138.
Li, J., and Y.-L. Chen, 1999: A case study of nocturnal rainshowers
over the windward coastal region of the island of Hawaii. Mon.
Wea. Rev., 127, 2674-2692.
Wang, J. J., H.-M. H. Juang, K. Kodama, S. Businger, Y.-L. Chen, and
J. Partain, 1998: Application of the NCEP regional spectral model to
improve weather forecasts in Hawaii. Wea. Forecasting, 13,
560-575.
Yeh, H.-C., and Y.-L. Chen, 1998: Characteristics of the rainfall
distribution over Taiwan during TAMEX. J. Appl. Meteor.,
37, 1457-1469.
Feng, J., and Y.-L. Chen, 1998: Evolution of katabatic winds on the
island of Hawaii during 10 August 1990. Mon. Wea. Rev., 126,
2185-2199.
Li, J., and Y.-L. Chen, 1998: Barrier jets during TAMEX. Mon.
Wea. Rev., 126, 959-971.
Wang, J.-J., and Y.-L. Chen, 1998: A case study of Hawaiian
trade-wind rainbands and their interaction with the island-induced
airflow. Mon. Wea. Rev., 126, 409-423.
Li, J., Y.-L. Chen, and W.-C. Lee, 1997: Analysis of a heavy rainfall
event during TAMEX. Mon. Wea. Rev., 125, 1060-1082.
Chen, Y.-L., X. A. Chen, S. Chen, and Y.-H. Kuo, 1997: A numerical
study of the low-level jet during TAMEX IOP 5. Mon. Wea. Rev.,
125, 2583-2604.
Chen, Y.-L., 1996: Airflow over the island of Hawaii. Hawaii Medical
Journal, 55, 44-45. (Special issue on VOG).
Wang, J.-J., and Y.-L. Chen, 1995: Characteristics of near-surface
wind and thermal profiles on the windward slopes of the island of
Hawaii. Mon. Wea. Rev., 123, 3481-3501.
Chen, Y.-L., and J. Li, 1995: Large-scale conditions favorable for the
development of heavy precipitation during TAMEX IOP 3. Mon. Wea.
Rev., 123, 2978-3002.
Chen, X. A., and Y.-L. Chen, 1995: Development of low-level jets
during TAMEX. Mon. Wea. Rev., 123, 1695-1719.
Chen, Y.-L., and J. Feng, 1995: The influences of inversion height on
the precipitation and airflow over the island of Hawaii. Mon. Wea.
Rev., 123, 1660-1676.
Chen, Y.-L., and J. Li, 1995: Characteristics of surface airflow and
pressure patterns over the island of Taiwan during TAMEX. Mon. Wea.
Rev., 123, 695-716.
Chen, Y.-L., and J.-J. Wang, 1995: The effects of precipitation on
the surface temperature and airflow over the island of Hawaii. Mon. Wea. Rev.,
123, 681-694.
Chen, Y.-L., X. A. Chen, and Y.-X. Zhang, 1994: A diagnostic study
of the low-level jet (LLJ) during TAMEX IOP 5. Mon. Wea. Rev.,
122, 2257-2284.
Chen, Y.-L., and J.-J. Wang, 1994: Diurnal variation of surface
thermodynamic fields on the island of Hawaii. Mon. Wea. Rev.,
122, 2125-2138.
Chen, Y.-L., and A. J. Nash, 1994: Diurnal variation of surface
airflow and rainfall frequencies on the island of Hawaii. Mon. Wea.
Rev., 122, 34-56.
Chen, Y.-L., 1993: Some synoptic-scale aspects of the surface fronts
over southern China during TAMEX. Mon. Wea. Rev., 121,
50-64.
Chen, Y.-L., and N. B.-F. Hui, 1992: Analysis of a relatively dry front
during the Taiwan Area Mesoscale Experiment. Mon. Wea. Rev.,
120, 2442-2468.
Chen, W., Y.-L. Chen, and J. Chen, 1992: A numerical study of the PBL
conditions over 34 reclaimed grassland. Acta Meteor. Sinica,
6, 345-354.
Chen, Y.-L., and N. B.-F. Hui, 1990: Analysis of a shallow front during
TAMEX. Mon. Wea. Rev., 118, 2607-2623.
Chen, Y.-L., Y.-X. Zhang, and N. B.-F. Hui, 1989: Analysis of a surface
front during the early summer rainy season over Taiwan. Mon. Wea.
Rev., 117, 909-931.
Chen, Y.-L., 1989: Aspects of midlatitude influences on the surface
front over southern China during TAMEX. Papers. Meteor. Res.,
12, 159-174.
Chen, Y.-L., 1988: Life cycle effects of cloud clusters on the moisture
distribution over the eastern Atlantic. J. Meteor. Soc. Japan,
66, 387-391.
Chen, Y.-L., 1987: Thermodynamic effects of mesoscale convective systems
on the environment over the eastern Atlantic. J. Meteor. Soc. Japan,
65, 391-400.
Chen, Y.-L., 1985: On the diagnosis of the net cloud mass flux in GATE.
J. Atmos. Sci., 42, 1757-1769.
Chen, Y.-L., 1985: Tropical squall lines over the eastern Atlantic during
GATE. Mon. Wea. Rev., 113, 2015-2022.
Ogura, Y., and Y.-L. Chen, 1984: Reply. J. Atmos. Sci., 41,
308-309.
Chen, Y.-L., and Y. Ogura, 1982: Modulaion of convective activity by
large-scale flow patterns in GATE. J. Atmos. Sci., 39,
1260-1279.
Ogura, Y., Y.-L. Chen, J. Russell, and S.-T. Soong, 1979: On the formation
of organized convective systems observed over the eastern Atlantic.
Mon. Wea. Rev., 17, 426-441.
Ogura, Y., and Y.-L. Chen, 1977: A life history of an intensive meso-scale
convective storm in Oklahoma. J. Atmos. Sci., 33, 1458-1476.
NSF, Conditions favorable for the development of heavy precipitation
during TAMEX. $170,000, 07/15/92-12/31/94.
(PI: Y.-L. Chen)
NSF, Relationship between mesoscale environment and Hawaiian rain band.
$157,919, 01/01/94-06/30/96. (PI: Y.-L. Chen)
NSF, Synoptic and mesoscale analyses of heavy precipitation events
during TAMEX. $235,331, 03/15/95-02/28/99. (PI: Y.-L. Chen)
NSF, Relationship between mesoscale environment and Hawaiian rain
band (II). $292,607, 01/01/97-12/31/00. (PI: Y.-L. Chen)
COMET/UCAR, Improvement of lower boundary conditions and model
verifications for the mesoscale spectral model. $6,815,
10/15/98-06/30/00. (PI: Y.-L. Chen)
NOAA, Application of the NCEP nested regional spectral model to improve
heavy rainfall and high wind forecasting in Hawaii. $37,500,
09/01/99-06/30/01. (PI: Y.-L. Chen)
COMET/UCAR, Application of the NCEP nested regional spectral model to
improve weather forecasting in Hawaii. $88,597, 01/01/98-03/31/02.
(PI: Y.-L. Chen)
NSF, Effects of island-induced circulation on localized heavy rainfall.
$204,642, 06/15/98-12/31/02. (PI: Y.-L. Chen)
COMET/UCAR, High resolution simulations of high wind and heavy rainfall
events. $10,000, 10/01/01-09/30/02. (PI: Y.-L. Chen)
NOAA, Application of the NCEP high resolution spectral model to improve
weather forecasting in Hawaii. $24,972, 10/01/01-12/31/02.
(PI: Y.-L. Chen)
NIEH*, Effects of volcanic air pollution on respiratory health.
$225,000, 09/30/01-07/31/02. (PI: E. Tam; Co-PI: Y.-L. Chen)
USFS, Case study of mesoscale fire weather modeling in Hawaii.
$50,000, 07/01/01-06/30/03. (PI: Y.-L. Chen)
USFS, Mesoscale modeling for fire management applications in Hawaii.
$60,000, 03/31/03-09/30/04. (PI: Y.-L. Chen)
COMET/UCAR, Application of high resolution mesoscale models to improve
weather forecasting in Hawaii. $10,000, 01/01/04-12/31/04.
(PI: Y.-L. Chen)
HPC/UH#, Effects of trade-wind strength on the lee-side circulation
of the island of Hawaii. $25,009, 07/01/04-08/31/05. (PI: Y.-L. Chen)
COMET/UCAR, Characteristics of the trade-wind inversion over the Hawaiian
Islands. $10,000, 11/01/04-03/31/06. (PI: Y.-L. Chen)
HPC/UH#, Numerical simulations of airflow and weather over the island of Oahu.
$13,395, 07/01/05-08/31/06. (PI: Y.-L. Chen)
NSF, Island-scale circulations over the island of Hawaii. $263,340,
08/01/02-01/31/07. (PI: Y.-L. Chen)
COMET/UCAR, Application of high resolution weather models to improve weather forecasting
over the Hawaiian Islands. $10,000, 07/01/06-09/30/07. (PI: Y.-L. Chen)
HPC/UH#,
High resolution simulations of heavy rainfall events over the Hawaiian Islands. $13,215, 01/01/07-12/31/07. (PI: Y.-L. Chen)
NOAA, Development of integrated systems and products for fire risk management and
fire weather forecasts. $110,000, 06/01/06-06/30/08. (PI: Y.-L. Chen)
COMET/UCAR, Analyses of an unusual heavy rainfall period over the Hawaiian
Islands. $10,702, 07/01/07-06/30/08. (PI: Yi-Leng Chen)
USFS/USDA, High resolution fire weather/fire danger forecasts for Hawaii.
$145,000, 12/15/04-09/30/09. (PI: Y.-L. Chen).
DTC/UCAR, A Study of the Island-Scale Numercial Weather Forecasting Using
WRF/LSM models over Hawaii. $13,414, 07/01/08-08/31/09. (PI: Y.-L. Chen).
PDC, Development and Improvement High-Resolution Weather Models for Vog
Transport in Hawaii and Significant Weather Events in Vietnam. $65,338.
09/15/08-12/31/09. (PI: Y.-L. Chen).
COMET/UCAR, High-Resolution Weather Modeling to Improve Local Weather
Forecasts over the Hawaiian Islands. $11,962. 06/01/2009-05/31/2010. (PI:
Y.-L. Chen).
COMET/UCAR, Validation of the High-resolution WRF-NM/LSM over the
Hawaiian Islands. $11,913, 06/01/2009-05/31/2010. (PI: Y.-L. Chen).
US Army Corps of Engineers and State of Hawaii: Revision of the Rainfall
Atlas of Hawaii. $66,759 (Chen’s portion), 11/01/2008-05/31/2011.
NOAA, Developing the Pacific Islands Ocean Observing System (PacIOOS):
Atmospheric Modeling Component. $300,889. (Chen’s portion)
10/01/97-12/31/11.
Norman B.-F. Hui (MS, 1988), Yuxia Zhang (MS, 1989), Andrew J. Nash (MS, 1992), Kiattisak Thangtrongsakol (MS, 1992), Xin An
Chen (PhD, 1995), Jian-Jian Wang (PhD, 1995), Jun Li (PhD, 1996), Jeffrey L. Frye (MS, 1996), JiuHua Feng (PhD, 1998), Hsi-Chyi
Yeh (PhD, 1999), Mary Ann Esteban (MS, 2002), Brandon Kerns (MS, 2003), Treena Loos (MS, 2004), Yongxin Zhang (PhD, 2004), Jennifer
B. Bingaman (MS, 2005), Yang Yang (PhD, 2005), DaNa L. Carlis (PhD, 2007), I. Shiro Jayawardena (MS, 2007), N. P. Smith (MS, 2009),
Sandra Richard (MS, 2010), Hiep Van Nguyen (MS, 2006; PhD, 2011), Chuan-Chi Tu (MS, 2008; PhD in progress), Khervin Cheng Chua (MS,
in progress), David Hitzl (MS, in progress), Feng Hsiao (PhD, in Progress), Liye Li (MS, in progress), Thomas Winning, Jr.
(MS, in progress).
Postdoc or Visiting Researchers:
J.-H. Teng (1996-1997), M.-Y. Chang (1996-1997), J. Li (1996-1998), H.-C. Yeh (2001, 2002, one month each year),Y. Zhang (2005),
J.-S. Huang (2005), H.-H. Lin (2007), Hsin-Chyi Yeh (2008-2009), Chunhua Zhou (2009-2010), Hiep Van Nguyen (2011-2012), Yu Du (2012-), Chih-Ying Chen (2012-).
Courses Taught:
MET 101 Introduction to Meteorology
MET 302 Atmospheric Physics
MET 303 Introduction to Atmospheric Dynamics
MET 352 Theoretical Meteorology I
MET 353 Theoretical Meteorology II
MET 405 Satellite Meteorology
MET 412* Meteorological Analysis Lab
MET 416* Tropical Analysis Lab
MET 606* Cumulus Dynamics
MET 607 Mesoscale Meteorology
MET 610* Tropical Meteorology
MET 699 Directed Individual Studies
MET 765b Seminar in Meteorology: General
MET 765c Seminar in Meteorology: Research Results
