King-Fai Li, PhD
Assistant Professor of Environmental Sciences/Statistics,
University of California, Riverside
EMAIL: king-fai.li (at) ucr.edu
Appointments
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Assistant Professor, Environmental Sciences/Statistics,
University of California, Riverside, Jan 2018–Now.
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Acting Assistant Professor, Applied Mathematics,
University of Washington, Seattle, Apr 2013–Dec 2017.
Class taught: AMATH301 - Beginning Scientific Computing.
Master Students: Mr. Qi Guo, Mr. Cameron Taketa (online)
Volunteer student: Mr. Benjamin L. Slawski
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Jack Eddy Fellow, University Corporate for Atmospheric Research,
Boulder, Colorado, 2013–2014.
Host: Prof. Ka-Kit Tung, University of Washington.
Education
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BSc, Physics, The Chinese University of Hong Kong, 2004.
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MPhil, Physics, The Chinese University of Hong Kong, 2006.
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PhD, Environmental Science and Engineering, California Institute of
Technology, 2013.
Academic Awards
Research Interests
- Tropical Intraseasonal Variability of Chemical Tracers
- Solar Cycles and Stratospheric Changes
- Global Change in Precipitation
- Possible astrobiological signatures on exoplanets
- Advanced statistical methods for climate studies
Research Descriptions
My research interests broadly cover various fields in
atmospheric science, from Earth to exoplanets, from tropical dynamics,
stratospheric chemistry to radiative transfer, on processes of time scales
ranged from diurnal to decadal, or to even billion years. These works
require knowledge in statistics including data retrieval and signal
processing, and modeling such as sensitivity to input parameters. My
long-term interest is to utilize ground-based and satellite observations
and to evaluate our capability in predicting climate change during the 21st
century with state-of-the-art climate models.
Solar cycles and Stratospheric Chemistry
Whether the solar cycle has important influence on the current climate remains
as a controversial issue. Nonetheless, it is sometimes used to test the climate
sensitivity of general circulation models. Since most of the solar cycle variations
occur in the shortwave region (~120-300 nm), any solar-cycle effects on climate
are expected to be enhanced in the middle atmosphere via solar heating due to
stratospheric ozone absorption. The different heating of the stratosphere as
a function of latitude due to these absorption processes may modify the tropospheric
circulation, leading to changes in the hydrological cycle. Thus thorough knowledge
of the chemical and thermodynamic changes in the stratosphere is a key for
understanding how solar cycle may relate decadal changes in our climate.
One of my research interests is to characterize the stratospheric changes
related to the solar cycle in temperature, ozone, and other chemical species from
both models and ground-based/satellite observations.
Recently, I resolved a 30-year puzzle about the 11-year solar
response of tropical ozone, pointing out that a part of the ozone
decadal variability in the long-term satellite record was contaminated
by satellite orbital drifts and that conventional photochemistry
explains the ozone solar response satisfactorily after removing the
effects of the satellite orbital drifts.
At high latitudes, I showed that the solar cycle may act to increase
the polar ozone by ~20% by weakening the polar vortex, thereby increasing the
inflow of ozone-rich air from low latitudes to the polar region, confirming
the teleconnection mechanism of the solar cycle modulation at low latitides.
These work have been summarized in
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Li, K.-F., L.-C. Lin, X.-H. Bui, M.-C. Liang (2018),
11-year
solar-cycle response in ionospheric electron density observed by GPS
radio occultation, J. Geophys. Res., 123, 848–861,
doi:10.1002/2017JA024634.
-
Li, K.-F., Q. Zhang, K.-K. Tung, Y. L. Yung (2016),
Resolving a long-standing model-observation discrepancy
in stratospheric ozone response to solar cycle,
Earth Space Sci., 3, 431–440, doi:10.1002/2016EA000199.
-
Wang, S., Q. Zhang, L. Millán, K.-F. Li, Y. L. Yung, S. P. Sander,
N. J. Livesey, M. L. Santee (2015),
First Evidence of HO2 Response to 27-day Solar Cycles From
Satellite Observations, Geophys. Res. Lett., in press.
-
Li, K.-F., and K.-K. Tung (2014),
Quasi-biennial oscillation and solar cycle influences on winter
Arctic total ozone, J. Geophys. Res. Atmos., 119, 5823–5835,
doi:10.1002/2013JD021065.
-
Wang, S., K.-F. Li, T. J. Pongetti, S. P. Sander, Y. L. Yung,
M.-C. Liang, N. J. Livesey, M. L. Santee, J. W. Harder, M. Snow, and
F. P. Mills (2013),
Atmospheric OH Response to the most recent 11-year Solar Cycle,
Proc. Natl. Acad. Sci. U. S. A., 110, 2023–2028,
doi:10.1073/pnas.1117790110.
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Liang, M.-C., K.-F. Li, R.-L. Shia, and Y. L. Yung (2008),
Short-period solar cycle signals in the ionosphere observed by FORMOSAT-3/COSMIC
, Geophys. Res. Lett., 35, L15818, doi:10.1029/2008GL034433.
Intraseasonal Variability of Atmospheric Chemical Tracers
The Madden-Julian oscillation (MJO) is the most dominant form of intraseasonal
variability in the tropical atmosphere. The dynamical aspects of MJO
have long been known and are subjects of active research. However, the impact
of the MJO on atmospheric compositions has been realized only recently.
One of my research
projects examined how MJO modulates the distribution of carbon dioxide (CO2)
in the tropics. CO2 is the most important anthropogenic greenhouse
gas in the present-day climate. To date, almost all of the discussions
on atmospheric CO2 have focused on the variability with time scales
from annual to centennial time scales, either because of the limitations of
data or the relevant time scales that relates climate change.
Recently, mid-tropospheric CO2 retrieved by the NASA Atmospheric
Infrared Sounder (AIRS) provides us the first global daily CO2 data,
allowing the study of subseasonal variability. In 2010, I found a subseasonal
variability in the 7-year data of AIRS CO2 associated with
the Madden-Julian oscillation (MJO).
The signal is about ~1 ppmv or ~0.3% of the mean CO2 in the
atmosphere, which is of the critical scale for identifying both oceanic and
land sources of carbon flux. I also showed evidence that the modulation is
likely to be driven by lower tropospheric vertical motions. These short-term processes
can organize, transport and mix CO2 and provide a robustness test
for coupled carbon-climate models. I
have also been examining the MJO-modulations in other tracers such as water vapor,
ozone, and carbon monoxide. The MJO can also modulate other tracers.
The detailed structures of these MJO impacts are
useful for chemical transport modelers and will help improve the forecasts of
atmospheric compositions. Papers related to these research activities include
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Li, K.-F. (2018),
An intraseasonal variability in CO2 over the Arctic
induced by the Madden-Julian oscillation,
Geophys. Res. Lett., 45, 1630–1638, doi:10.1002/2017GL076544.
-
Li, K.-F., B. Tian, K.-K. Tung, L. Kuai, J. R. Worden, Y. L. Yung,
and B. L. Slawski,
A link between tropical intraseasonal variability and Arctic ozone,
J. Geophys. Res., 118, 4280–4289, doi:10.1002/jgrd.50391.
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Li, K.-F., B. Tian, D. E. Waliser, M. J. Schwartz,
J. L. Neu, J. R. Worden, and Y. L. Yung (2011),
Vertical structure of MJO-related subtropical ozone variations
from MLS, TES, and SHADOZ data, Atmos. Chem. Phys.,
11, 24503-24533, doi:10.5194/acp-12-425-2012.
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Li, K.-F., B. Tian, D. E. Waliser, Y. L. Yung (2010),
Tropical mid-tropospheric CO2 variability driven
by the Madden-Julian oscillation,
Proc. Natl. Acad. Sci.—U. S. A.,
107, 19171-19175, doi:10.1073/pnas.1008222107.
Possible astrobiological signatures on exoplanets
Currently the only method for detection of extraterrestrial life
is by remote sensing. A recent discovery of water vapor, methane
and carbon dioxide on an exoplanet suggests
that habitable exoplanets might be very common in the universe. The remaining
question is whether these exoplanets might have life. According to Drake's
equation, the probability of detecting an extraterrestrial civilization is
directly proportional to the duration over which they broadcast (e.g. in
electromagnetic waves). Such duration is obviously bounded by the life span of
their biosphere. In Gaia Hypothesis, the Earth's biosphere, through the
regulation of the global surface temperature (in geological time scales) by the
carbonate-silicate cycle around the evolving Sun, can last only for ~1 Ga more
from present. In 2009, my colleagues and I suggested that the global surface
temperature may also be regulated by the atmospheric pressure. This would
potentially extend the life span of the biosphere to ~2 Ga, doubling the chance
of humans being detected by extraterrestrial intelligence. The change in the
atmospheric pressure may lead to signatures in infrared spectrum, which may be
observable with current or near-future technologies. This research has been
discussed in
Advanced statistical methods for climate studies
Secular climate changes are generally small and are difficult to detect.
To examine these secular changes, much larger climate variations such
as the seasonal cycle and the El Nino have to be removed first.
Linear statistical methods such as the correlation analysis are usually
employed for the removal but the processes to be removed
are required to be stationary and linear, which is generally not true
for real data. There have been growing interests in developing adaptive
methods that decompose a non-linear time series based only on the nature
of the time series per se, in the way that the decomposition
does not require any assumptions or prior information. Examples of such
adaptive methods include the Empirical Mode Decomposition (EMD), and
the Decomposition Matching Pursuit (DMP). In 2012, I worked with two
summer undergraduates and used the above two methods to examine the
climate signals imprinted in atmospheric temperature
and chlorofluorocarbons (CFCs). We successfully extracted a less-known
near-annual oscillation (period ~1.5 yr) in the atmospheric temperature
and a change in the seasonal cycle of the CFCs after the global CFC
regulation in 1995. These studies demonstrate the usefulness of these
newly developed statistical methods for climate studies. Papers related
to these studies are
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Shi, Y., K.-F. Li, Y. L. Yung, H. H. Aumann, Z. Shi,
and T. Y. Hou (2013),
A decadal microwave record of tropical air temperature from AMSU-A/aqua observations,
Clim. Dyn., 41, 1385–1405, doi:10.1007/s00382-013-1696-x.
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Kobayashi–Kirschvink, K. J., K.-F. Li,
R.-L. Shia, and Y. L. Yung (2012),
Fundamental modes of Atmospheric CFC-11 from Empirical Mode
Decomposition,
Adv. Adapt. Data. Anal., 4, 1250024,
doi:10.1142/S1793536912500240.
Publications
2022
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Albright, R., A. Corbett, X. Jiang, E. Creecy, S. Newman, K.-F. Li,
M.-C. Liang, Y. L. Yung (2022),
Seasonal variations of solar-induced
fluorescence, precipitation, and carbon dioxide over the Amazon,
Earth Space Sci., 9, e2021EA002078, doi:10.1029/2021EA002078.
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Huang, S., P.-R. Huang, S. Newman, K.-F. Li, Y.-C. Lin,
C.-A. Huh, N.-H. Lin, S.-C. Hsu, M.-C. Liang (2022),
Enhanced stratospheric intrusion at
Lulin Mountain, Taiwan inferred from beryllium-7 activity,
Atmos. Environ., 268, 118824, doi:10.1016/j.atmosenv.2021.118824.
2021
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Hsueh, Y.-H., K.-F. Li, L.-C. Lin, S. K. Bhattachary, A. H. Laskar,
M.-C. Liang (2021)
East Asian CO2 level change
caused by Pacific Decadal Oscillation,
Remote Sens. Environ., 264, 112624, doi:10.1016/j.rse.2021.112624.
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K.-F. Li, R. Khoury, T. J. Pongetti, S. P. Sander, F. P. Mills, Y. L. Yung (2021),
Diurnal variability of stratospheric column
NO2 measured using direct solar and lunar spectra over Table Mountain,
California (34.38oN),
Atmos. Meas. Tech., 14, 7495–7510, 2021, doi:10.5194/amt-14-7495-2021.
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Jiang, X., K.-F. Li, M.-C. Liang, Y. L. Yung (2021),
Impact of Amazonian fires
on atmospheric CO2,
Geophys. Res. Lett., 48, e2020GL091875, doi:10.1029/2020GL091875.
2020
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Wang, S., K.-F. Li, D. Zhu, S. P. Sander, Yuk L. Yung, A. Pazmino,
and R. Querel (2020),
Solar 11-Year Cycle Signal in Stratospheric Nitrogen
Dioxide — Similarities and Discrepancies between Model and
NDACC Observations, Solar. Phys., 295, 117,
doi:10.1007/s11207-020-01685-1.
2019
2018
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Tung, K.-K., X. Chen, J. Zhou, and K.-F. Li (2018),
Interdecadal
variability in pan-Pacific and global SST, revisited,
doi:10.1007/s00382-018-4240-1, in press.
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Whelan, M. E., S. T. Lennartz, T. E. Gimeno, R. Wehr, G. Wohlfahrt,
Y. Wang, L. M. J. Kooijmans, T. W. Hilton, S. Belviso, P. Peylin,
R. Commane, W. Sun, H. Chen, L. Kuai, I. Mammarella, K. Maseyk,
M. Berkelhammer, K.-F. Li, D. Yakir, A. Zumkehr, Y. Katayama,
J. Ogée, F. M. Spielmann, F. Kitz, B. Rastogi, J. Kesselmeier, J. Marshall,
K.-M. Erkkilä, L. Wingate, L. K. Meredith, W. He, R. Bunk, T. Launois,
T. Vesala, J. A. Schmidt, C. G. Fichot, U. Seibt, S. Saleska,
E. S. Saltzman, S. A. Montzka, J. A. Berry, and J. E. Campbell (2018),
Reviews and Syntheses: Carbonyl Sulfide as a
Multi-scale Tracer for Carbon and Water Cycles, Biogeosci.,
15, 3625–3657, doi:10.5194/bg-15-3625-2018.
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Li, K.-F. (2018),
An intraseasonal variability in CO2 over the Arctic
induced by the Madden-Julian oscillation,
Geophys. Res. Lett., 45, 1630–1638, doi:10.1002/2017GL076544.
-
Li, K.-F., L.-C. Lin, X.-H. Bui, M.-C. Liang (2018),
11-year
solar-cycle response in ionospheric electron density observed by GPS
radio occultation, J. Geophys. Res., 123, 848–861,
doi:10.1002/2017JA024634.
2017
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Li, K.-F., Q. Zhang, S. Wang, S. P. Sander, and Y. L. Yung (2017),
Resolving Model-Observation Discrepancy in the Mesospheric
and Stratospheric HOx Chemistry,
Earth Space Sci., 4, 607–624, doi:10.1002/2017EA000283.
2016
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Li, K.-F., Q. Zhang, K.-K. Tung, Y. L. Yung (2016),
Resolving a long-standing model-observation discrepancy
in stratospheric ozone response to solar cycle,
Earth Space Sci., 3, 431–440, doi:10.1002/2016EA000199.
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Kuai, L., J. R. Worden, K.-F. Li, G. C. Hulley, F. M. Hopkins,
C. E. Miller, S. J. Hook, R. Duren, and A. Aubrey (2016), Characterization
of anthropogenic methane plumes with the Hyperspectral Thermal Emission
Spectrometer (HyTES): a retrieval method and error analysis,
Atmos. Meas. Tech., 9, 3165–3173, doi:10.5194/amt-9-3165-2016.
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Li, K.-F., H. Su, S.-N. Mak, T. M. Chang, J. H. Jiang, J R. Norris,
and Y. L. Yung (2016), An Analysis of
High Cloud Variability: Imprints from the El Niño-Southern Oscillation,
Clim. Dyn., doi:10.1007/s00382-016-3086-7.
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Newman, S., X. Xu, K. R. Gurney, Y. K. Hsu, K.-F. Li, X. Jiang,
R. Keeling, S. Feng, D. O'Keefe, R. Patarasuk, K. W. Wong, P. Rao,
M. L. Fischer, and Yuk L. Yung (2016),
Toward consistency between trends
in bottom-up CO2 emissions and top-down atmospheric
measurements in the Los Angeles megacity, Atmos. Chem. Phys.,
6, 3843–3863, doi:10.5194/acp-16-3843-2016.
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Su, Z., X. Xi, V. Natraj, K.-F. Li, R.-L. Shia, C. E. Miller, and Y. L.
Yung (2016), Information-rich spectral channels
for simulated retrievals of partial column-averaged methane,
Earth Space Sci., 3, 2–14, doi:10.1002/2015EA000120.
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Zhou, J., K.-K. Tung, K.-F. Li (2016),
Multidecadal variability
in the Greenland ice core records, Clim. Dyn., 47, 739–752,
doi:10.1007/s00382-015-2866-9.
2015
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Wang, S., Q. Zhang, L. Millán, K.-F. Li, Y. L. Yung, S. P. Sander,
N. J. Livesey, M. L. Santee (2015),
First Evidence of HO2 Response
to 27-day Solar Cycles From Satellite Observations,
Geophys. Res. Lett., 42, 10004–10009, doi:10.1002/2015GL065237.
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Kuai, L., J. R. Worden, J. E. Campbell, S. S. Kulawik, K.-F. Li, M. Lee,
R. J. Weidner, S. A. Montzka, F. L. Moore, J. A. Berry, I. Baker, A. S. Denning,
H. Bian, K. W. Bowman, J. Liu, and Y. L. Yung (2015),
Estimate of carbonyl sulfide tropical oceanic surface fluxes using Aura
Tropospheric Emission Spectrometer observations, J. Geophys. Res.,
120, 11012–11023, doi:10.1002/2015JD023493.
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Zhang, Q, V. Natraj, K.-F. Li, R.-L. Shia, D. Fu, T. J. Pongetti,
S. P. Sander, C. M. Roehl, Y. L. Yung (2015),
Accounting for aerosol scattering in the CLARS retrieval of column
averaged CO2 mixing ratios, J. Geophys. Res. Atmos.,
120, 7205–7218, doi: 10.1002/2015JD023499.
2014
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Liu, C., B. Tian, K.-F. Li, G. Manney , N. Livesey , Y. L. Yung,
and D. E. Waliser (2014),
Northern Hemisphere mid-winter
vortex-displacement and vortex-split stratospheric sudden warmings:
Influence of the Madden-Julian Oscillation and Quasi-Biennial
Oscillation,
J. Geophys. Res., 119, 12599–12620, doi:10.1002/2014JD021876.
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Li, K.-F., and K.-K. Tung (2014),
Quasi-Biennial Oscillation and Solar Cycle Influences
on Winter Arctic Total Ozone,
J. Geophys. Res., 119, 5823–5835,
doi:10.1002/2013JD021065.
2013
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Li, K.-F., B. Tian, K.-K. Tung, L. Kuai, J. R. Worden, Y. L. Yung,
and B. L. Slawski (2013),
A link between tropical intraseasonal variability and Arctic ozone,
J. Geophys. Res., 118, 4280–4289, doi:10.1002/jgrd.50391.
-
Shi, Y., K.-F. Li, Y. L. Yung, H. H. Aumann, Z. Shi,
and T. Y. Hou (2013),
A decadal microwave record of tropical air temperature from AMSU-A/aqua observations,
Clim. Dyn., 41, 1385–1405, doi:10.1007/s00382-013-1696-x.
-
Kobayashi–Kirschvink, K. J., K.-F. Li,
R.-L. Shia, and Y. L. Yung (2012),
Fundamental modes of Atmospheric CFC-11 from Empirical Mode
Decomposition,
Adv. Adapt. Data. Anal., 4, 1250024,
doi:10.1142/S1793536912500240.
-
Wang, S., K.-F. Li, T. J. Pongetti, S. P. Sander, Y. L. Yung,
M.-C. Liang, N. J. Livesey, M. L. Santee, J. W. Harder, M. Snow, and
F. P. Mills (2013),
Midlatitude atmospheric OH response to the most recent 11-y solar cycle,
Proc. Natl. Acad. Sci. U. S. A., 110, 2023–2028,
doi:10.1073/pnas.1117790110.
2012
2011
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Li, K.-F., B. Tian, D. E. Waliser, M. J. Schwartz,
J. L. Neu, J. R. Worden, and Y. L. Yung (2011),
Vertical structure of MJO-related subtropical ozone variations
from MLS, TES, and SHADOZ data, Atmos. Chem. Phys.,
11, 24503–24533, doi:10.5194/acp-12-425-2012.
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Jiang, X., D. E. Waliser, W. S. Olson, W.-K. Tao, T. S. L'Ecuyer,
S. Shige, K.-F. Li, Y. L. Yung, S. Lang, and Y. N. Takayabu
(2011),
Vertical diabatic heating structure of the MJO: Intercomparison
between recent reanalyses and TRMM estimates, Mon. Wea. Rev.,
139, 3208–3223, doi:10.1175/2011MWR3636.1.
2010
2009
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Li, K.-F., K. Pahlevan, J. L. Kirschvink, Y. L. Yung (2009),
Atmospheric Pressure as a Natural Climate Regulator of a
Terrestrial Planet with a Biosphere,
Proc. Natl. Acad. Sci.—U. S. A.,
106, 9576–9579, doi:10.1073/pnas.0809436106.
(This article has been featured in
WiredScience,
ScienceNews,
Nature Highlights,
Caltech Press Releases,
Environmental Research Web, and
TIME Magazine.)
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Natraj, V., K.-F. Li and Y. L. Yung (2009),
Rayleigh Scattering in Planetary Atmospheres: Corrected Tables
Through Accurate Computation of X and Y Functions,
Astrophys. J., 691, 1909, doi:10.1088/0004-637X/691/2/1909.
2008
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Liang, M.-C., K.-F. Li, R.-L. Shia, and Y. L. Yung (2008),
Short-period solar cycle signals in the ionosphere observed by
FORMOSAT-3/COSMIC, Geophys. Res. Lett., 35, L15818,
doi:10.1029/2008GL034433.
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Cheung, R., K.-F. Li, S. Wang, T. J. Pongetti, R. P. Cageao,
S. P. Sander, and Y. L. Yung (2008),
Atmospheric hydroxyl radical (OH) abundances from ground-based
ultraviolet solar spectra: an improved retrieval method,
Appl. Opt., 47, 6277–6284, doi:10.1364/AO.47.006277.
2006
2005
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Li, K.-F., R. P. Cageao, E. M. Karpilovsky, F. P. Mills,
Y. L. Yung, J. S. Margolis, and S. P. Sander (2005),
OH column abundance over Table Mountain Facility, California:
AM-PM diurnal asymmetry, Geophys. Res. Lett., 32,
L13813, doi:10.1029/2005GL022521.
Selected Conference Presentations
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Li, K.-F., Q. Zhang, K.-K. Tung, Y. L. Yung (2016), Resolving a
long-standing model-observation discrepancy on ozone solar-cycle response,
Abstract SA51B-2419. Poster presented at 2016 Fall Meeting, AGU,
San Francisco, CA, 12–16 Dec.
-
Wang, S., K.-F. Li, R.-L. Shia, Y. L. Yung, and S. P. Sander (2016),
Comparison of Model and Observations of Middle Atmospheric
HOx Response to Solar 27-day Cycles: Quantifying
Model Uncertainties due to Photochemistry, Abstract SA54A-03. Oral
presentation at 2016 AGU Fall Meeting, San Francisco, CA,
12–16 Dec.
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Li, K.-F., L. Kuai, J. R. Worden (2016),
Satellite Retrievals of OCS from NASA's Tropospheric Emission Spectrometer,
Poster Presentation at 2016 OCS Workshop,
Hyytiälä, Finland, 5–9 Sep.
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Li, K.-F., K. Yao, C. Taketa, X. Zhang, M.-C. Liang, X. Jiang,
C. E. Newman, K.-K. Tung, Y. L. Yung (2016), A cyclostrophic transformed
Eulerian zonal mean model for the middle atmosphere of slowly rotating
planets, Geophysical Research Abstracts, 18, EGU2016-3662.
Oral presentation at 2016 EGU General Assembly, Vienna, Austria,
17–22 Apr.
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Yao, K., K.-F. Li, C. Taketa, X. Zhang, M.-C. Liang, X. Jiang,
C. E. Newman, K.-K. Tung, Y. L. Yung (2015), A cyclostrophic transformed
Eulerian zonal mean model for the middle atmosphere of slowly rotating
planets, Abstract P23A-2102. Poster presented at 2015 Fall Meeting, AGU,
San Francisco, CA, 14–18 Dec.
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Shia, R.-L., Q. Zhang, S. Wang, K.-F. Li, S. P. Sander, Y. L. Yung
(2015), A Sensitivity Study of Mesospheric and Stratospheric
HOx Chemistry, Abstract SA43A-2360. Poster presented
at 2015 Fall Meeting, AGU, San Francisco, CA, 14–18 Dec.
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Wang, S., Q. Zhang, L. F. Millán, K.-F. Li, Y. L. Yung, S. P. Sander,
N. J. Livesay, M. L. Santee (2015) First Evidence of Middle Atmospheric
HO2 Response to UV variability during 27-day Solar Cycles From
Satellite Observations, Abstract SH32A-07. Oral presentation at 2015 Fall
Meeting, AGU, San Francisco, CA, 14–18 Dec.
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Li, K.-F., T. Chang, S.-N. Mak, K. Antilla, Y. L. Yung, H. Su,
S. Wong, J. H. Jiang (2015), Interannual Variabilities in High Cloud
Cover from AIRS Data and Comparison to Climate Models, Abstract
A41E-0104. Poster presented at 2015 Fall Meeting, AGU, San Francisco,
CA, 14–18 Dec.
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Li, K.-F., and K.-K. Tung (2015),
How Robust is the Observed
11-year Solar Cycle Signal in the Tropical Stratospheric Ozone?
Poster presented at the 2015 Composition and Transport in the
Tropical Troposphere and Lower Stratosphere Meeting, Boulder, CO,
20–23 Jul.
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Li, K.-F., Q. Zhang, S. Wang, Y. L. Yung, S. P. Sander (2014),
Response of Middle Atmospheric Hydroxyl Radical to the 27-Day Solar
Forcing, Abstract SA53A-4111. Poster presented at 2014 Fall Meeting,
AGU, San Francisco, CA, 15–21 Dec.
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Yung, Y. L., K. Antilla, S.-N. Mak, T. Chang, K.-F. Li, H. Su,
S. Wong, J. H. Jiang (2014), An Analysis of Interannual Variabilities
in High Cloud Cover from AIRS Data: Imprints of the El Niño-Southern
Oscillation and Comparison to Models, Abstract A12E-07.
Oral presented at 2014 Fall Meeting, AGU, San Francisco, CA,
15–21 Dec.
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Wang, S., L. F. Millan-Valle, K.-F. Li, S. P. Sander, Y. L. Yung,
N. J. Livesey, M. L. Santee, M.-C. Liang (2014),
Solar Cycle Induced Variability in Middle Atmospheric HOx
—Abundances and Partitioning, Abstract SA53A-4106.
Poster presented at 2014 Fall Meeting, AGU, San Francisco, CA,
15–21 Dec.
-
Newman, S., Y.-H. Wong, H.-I. Lee, K.-F. Li, X. Xu, J. Campbell,
Y. L. Yung (2013), Natural Variabilities and Trends in CO2
from the Los Angeles Megacity Measured Over 15 Years (2013),
Abstract A51J-03. Poster
presented at 2013 Fall Meeting, AGU, San Francisco, CA, 9–13 Dec.
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Wang, S., K.-F. Li, L. F. Millan-Valle, S. P. Sander,
Y. L. Yung, N. J. Livesey, M. L. Santee, M.-C. Liang (2013),
Solar Cycle Induced Variability in the Abundances and Partitioning
of Atmospheric HOx (2013), Abstract GC54A-05
presented at 2013 Fall Meeting, AGU, San Francisco, CA, 9–13 Dec.
-
Li, K.-F., and K.-K. Tung (2013), Solar Cycle Modulation on
Winter Arctic Ozone. Abstract ST01-13-15-D2-PM2-P-032 (ST01-13-15-A020).
Poster presented at 2013 Asia Oceania Geosciences Society (AOGS),
Brisbane, Queensland, Australia, 24–28 June.
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Zhang, Q., K.-F. Li, C. Li, M.-C. Liang, and Y. L. Yung (2012), A Sensitivity
Test of the Ozone Solar Cycle Response with Respect to Eddy Diffusivity, Abstract
A21G-0137. Poster presented at 2012 Fall Meeting, AGU, San Francisco, Calif., 3–7 Dec.
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Li, K.-F., S. Wang, S. P. Sander, X. Jiang, M.‐C. Liang, R.-L. Shia,
and Y. L. Yung (2012), The 27-day solar cycle modulation in hydroxyl radicals over
the Table Mountain Facilities, California (34.4°N), Abstract GC22E-02
Oral presentation at 2012 Fall Meeting, AGU, San Francisco, Calif., 3–7 Dec.
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Wang, S., K.-F. Li, T. J. Pongetti, S. P. Sander, Y. L. Yung, M.-C. Liang,
N. J. Livesey, M. L. Santee, J. W. Harder, M. Snow, and F. P. Mills, Atmospheric
OH Response to the most recent 11-year Solar Cycle, Abstract GC22E-03 Oral
presentation at 2012 Fall Meeting, AGU, San Francisco, Calif., 3–7 Dec.
-
Yung, Y. L., K.-F. Li, Xun Jiang, Mao-Chang Liang, Shuhui Wang,
Stanley P. Sander, Thomas J. Pongetti, and MLS Team (2012),
The 11-year Solar-Cycle Modulation of Stratospheric O3 in WACCM.
Oral Presenation at Quadrennial Ozone Symposium 2012, Toronto, ON.
Presentation can be downloaded from
here.
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Li, K.-F., T. Li, Th. Leblanc, I. S. McDermid, M.-C. Liang,
S. Wang, S. P. Sander, Y. L. Yung, and F. P. Mills (2011),
Modeling of the 11-year Solar Cycle Response in Upper Atmospheric Hydroxyl
Radicals, oral presentation at SORCE Science Team Meeting (September
2011), Sedona, AZ. Presentation can be downloaded from
http://lasp.colorado.edu/sorce/news/2011ScienceMeeting/docs/%20%20presentations/6d_Li_King_Fai_sorce2011.pdf
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Wang, S., K.-F. Li, T. J. Pongetti, S. P. Sander,
Y. L. Yung, M.-C. Liang, N. J. Livesey, M. L. Santee,
J. W. Harder, M. Snow, and F. P. Mills (2011),
Atmospheric OH Response to the 11-year Solar Cycle - Could the gap
between model and observations be filled by SORCE measurements?,
oral presentation in SORCE Science Team Meeting (September 2011),
Sedona, AZ. Presentation can be downloaded from
http://lasp.colorado.edu/sorce/news/2011ScienceMeeting/docs/presentations/2l_Wang_via_KF_Li_SORCE2011-kfl.pdf
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Su, Z., K.-F. Li, V. Natraj, R.-L. Shia, C. E. Miller, and Y. L. Yung (2011),
Space-borne measurements of atmospheric CH4 by high-resolution near
infrared spectrometry of reflected sunlight, Abstract A33C-0220, Poster
presented at 2011 Fall Meeting, AGU, San Francisco, Calif., 4-9 Dec.
-
Y. L. Yung, M.-C. Liang, K.-F. Li, X. Jiang,
and C. D. Camp (2011), Solar Cycle Variability in Tropical Column Ozone Abstract
GC23A-0924 Poster presented at 2011 Fall Meeting, AGU, San Francisco,
Calif., 4-9 Dec.
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Li, K.-F., B. L. Slawski, B. Tian, J. Flemming, P. Bechtold,
S. Wong, J. R. Worden, D. E. Waliser, and Y. L. Yung (2011), The Madden-Julian
Oscillation of Tropospheric Carbon Monoxide, Abstract A11G-0177, poster
presented at 2011 Fall Meeting, AGU, San Francisco, Calif., 4-9 Dec.
-
Li, K.-F., F. P. Mills, L. Rikus (2010), Intercomparison
of Precipitation Data and ACCESS AMIP simulations, oral presentation at
the Bureau of Meteorology, Melbourne, Australia. Presentation
downloadable from
http://www.accessimulator.org.au/file/ACCESSnov2010_KFLi.pdf.
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Li, K.-F., C. M. Logan, B. L. Slawski, B. Tian, D. E. Waliser,
Y. L. Yung (2010), Observed Intraseasonal Variability in Eastern Pacific,
poster presentation at Monsoon Intraseasonal Variability Modeling
Workshop 2010, Busan, Korea. Presentation downloadable from
http://www.ucar.edu/yotc/documents/mjo/korea_poster_presentations/ses3/Li_post.pdf
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Slawski, B. L., K.-F. Li, X. Jiang, D. E.
Waliser, and Y. L. Yung (2010), Vertical Structure of Diabatic Heating of
Convectively-Coupled Kelvin Waves from TRMM Satellite Products, Abstract
A11D-0073 Poster presented at 2010 Fall Meeting, AGU, San Francisco,
Calif., 13-17 Dec.
-
Li, K.-F., B. Tian, D. E. Waliser, and Y. L. Yung (2010),
Tropical Mid-Tropospheric CO2 Variability driven by the
Madden-Julian Oscillation, Abstract A54D-01, oral presentation at 2010 Fall
Meeting, AGU, San Francisco, Calif., 13-17 Dec.
-
Wang, S., S. P. Sander, K.-F. Li, Y. L. Yung,
M.-C. Liang, N. J. Livesey, and M. L. Santee (2010), Modeling the Observed
Atmospheric OH Response to the Solar Cycle, Abstract GC21B-0880 Poster
presented at 2010 Fall Meeting, AGU, San Francisco, Calif., 13-17 Dec.
-
Wang, S., S. P. Sander, T. J. Pongetti, K.-F. Li,
and Y. L. Yung (2010), Observing Atmospheric OH Response to the Solar Cycle -
Over 5-year Aura MLS OH Measurements in Combination With the 13-year
Ground-based FTUVS OH Measurements (Invited), Abstract GC33C-07 Talk
presented at 2010 Fall Meeting, AGU, San Francisco, Calif., 13-17 Dec.
-
Schreier, M. M., B. H. Kahn, S. L. Nasiri, K.-F.
Li, J. Karlsson, Q. Yue, S. Ou (2010), Variability of AIRS Infrared Spectra
in the Presence of Clouds Observed by MODIS Abstract A43B-0225 Poster
presented at 2010 Fall Meeting, AGU, San Francisco, Calif., 13-17 Dec.
-
Li, K.-F. (2009), Is there a 27-day solar cycle
signal in MLS temperature data?, oral presentation at the 2nd
International Space Weather Symposium, Nanjing, China.
-
Heavens, N. G., M. Liang, L. Lin, K.-F. Li,
K.-K. Tung, and Y. L. Yung (2009), Assessing Low Frequency Variability in North
Atlantic Ocean Sea Surface Temperatures in Global Climate Models, Eos Trans.
AGU, 90, Fall Meet. Suppl., Abstract GC32A-08 (oral).
-
Fu, D., S. P. Sander, J. Stutz, T. J. Pongetti, Y.
L. Yung, M.-T. Wong, V. Natraj, K.-F. Li, and R.-L. Shia (2009),
Spectropolarimetric Measurements of Scattered Sunlight in the Huggins Bands:
Retrieval of Tropospheric Ozone Profiles, Eos Trans. AGU, 90, Fall Meet.
Suppl., Abstract A33D-0281 (poster).
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Wang, S., T. J. Pongetti, S. P. Sander, N. J.
Livesey, K.-F. Li, and Y. L. Yung (2009), Observing Odd Hydrogen Species
from Space- and Ground-based Instruments - 5-year Aura/MLS HOx Measurements and
12-year FTUVS OH Column Measurements (Invited), Eos Trans. AGU, 90, Fall
Meet. Suppl., Abstract A33D-0275 (poster).
-
Li, K.-F., C. M. Logan, B. L. Slawski, B. Tian, D. E.
Waliser, Y. L. Yung (2009), Global Observations of the Madden-Julian
Oscillations from Multi-Satellite Data, Eos Trans. AGU, 90, Fall Meet.
Suppl., Abstract A51F-0174 (poster).
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K.-K. Tung, M.-C. Liang, L. Lin, K.-F. Li,
and Y. L. Yung (2009), Effect of vertical ocean mixing on the transient climate
sensitivity of AOGCMs, Eos Trans. AGU, 90, Fall Meet. Suppl., Abstract
GC41A-0756 (poster).
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Toon, G. C., K.-F. Li, X. Zhang, C. E.
Miller, L. R. Brown, and Y. L. Yung (2009), Measuring Column Averaged Methane
Dry Air Mole Fraction from Space, Eos Trans. AGU, 90, Fall Meet. Suppl.,
Abstract A41C-0107 (poster).
-
Liang, M.-C., L. Lin, K.-F. Li, K.-K. Tung,
R.-L. Shia, and Y. L. Yung (2009), Multi-Decadal to Centennial Oscillations and
Climate Signals Inferred by Periodic Solar Forcing, Eos Trans. AGU, 90,
Fall Meet. Suppl., Abstract GC33A-0724 (poster).
-
Jiang, Y., H. H. Aumann, Y. L. Yung, and K.-F. Li
(2009), Climate Signal Detection from Multiple Satellite Measurements, Eos
Trans. AGU, 90, Fall Meet. Suppl., Abstract GC43A-0801 (poster).
-
Tung, K.-K., M.-C. Liang, L. Lin, K.-F. Li,
R.-L. Shia, M.-W. Yau, D. E. Waliser, and Y. L. Yung (2008), Global Temperature
Response to Solar-Cycle Forcing by GISS-EH AOGCM, a Calibration for Global
Change Models Eos Trans. AGU, 89, Fall Meet. Suppl., Abstract A21D-0219
(poster).
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Li, K.-F., A. Chung, L. Kuai, X. Zhang, J. S. Margolis, C. E.
Miller, and Y. L. Yung (2008), Spaceborne Measurements of the Column Averaged
Methane Dry Air Mole Fraction, Eos Trans. AGU, 89, Fall Meet. Suppl.,
Abstract GC51A-0681 (poster).
-
Nine, R., C. Ting, M.-C. Liang, K.-F. Li,
R.-L. Shia, and Y. L. Yung (2008), Temperature variability in the stratosphere
and troposphere from GPS measurements, Eos Trans. AGU, 89, Fall Meet.
Suppl., Abstract A43C-0324 (poster).
-
Leung, J. C.-Y., K.-F. Li, S. M. Kwan, R. S.
Helizon, S. P. Sander, and Y. L. Yung (2008), Ground-based measurement of
tropospheric ozone by polarization measurements in the Huggins bands, Eos
Trans. AGU, 89, Fall Meet. Suppl., Abstract A51I-0210 (poster).
-
Tung, K.-K., M.-W. Yau, K.-F. Li, R. L. Shia,
F. J.-L. Li, D. E. Waliser, and Y. L. Yung (2007), Solar-cycle response in
global climate models assessed by IPCC AR4, Eos Trans. AGU, 88, Fall
Meet. Suppl., Abstract GC43A-0935 (poster).
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Li, K.-F., X. Huang, B. Tian, D. E. Waliser, R.-L. Shia, and
Y. L. Yung (2007), Applying AIRS Hyperspectral Infra-Red Data to Cloud and
Water Vapor Studies of Climate, Eos Trans. AGU, 88, Fall Meet. Suppl.,
Abstract GC34A-07 (oral).
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Li, K.-F., X. Jiang, R.-L. Shia, K. K. Lee, T. J. Pongetti,
S. P. Sander, and Y. L. Yung (2006), Periodicities of Solar Activity from
Atmospheric Hydroxyl Radicals, Eos Trans. AGU, 87, Fall Meet. Suppl.,
Abstract SA21A-0223 (poster).
Last Modified:
01/20/2022 07:59:23
PST