Education: |
Ph.D., Atmospheric Science, 1989
University of Colorado
B.S., Physics, 1985
Harvey Mudd College, Claremont, CA
|
Research and Professional Experience:
|
1997-Present |
NASA-Ames Research Center, Moffett Field, CA
Research Scientist, Atmospheric Science Branch
|
1996-1997: |
Bay Area Environmental Research Institute
Research Scientist |
1995-1996 |
San Jose State University
Research Associate
|
1993-1995 |
Scripps Institution of Oceanography
Project Scientist
|
1990-1993 |
NASA Ames Research Center
NRC Associate
|
Scholarships and Awards:
|
|
- Subsonic Aircraft: Contrail and Cloud
Effects Special Study (SUCCESS), 1996,
DC-8 flight scientist
|
|
- SAGE III Ozone Loss and Validation Experiment
(SOLVE), 1999/2000, DC-8 flight scientist
|
|
- Florida Area Cirrus Experiment (CRYSTAL-FACE),
2002, project scientist
|
|
- Polar Aura Validation Experiment (PAVE),
2005, project scientist
|
|
- Water Isotope Intercomparison Flight
Series (WIIF), 2005, project scientist
|
|
- Costa Rica Aura Validation Experiment
(CRAVE), 2006, project scientist
|
Publications: |
Jensen, E. J., and A. S. Ackerman.
2006. Homogeneous aerosol freezing in the
tops of high-altitude tropical cumulonimbus
clouds. Geophys. Res. Lett., 33,
doi:10.1029/2005GL024928. |
Smith, J., A. S. Ackerman, E.
J. Jensen, and O. B. Toon. 2006. Role of deep
convection in establishing the isotopic composition
of water vapor in the tropical transition
layer. Geophys. Res. Lett., 33, doi:10.1029/2005GL024078. |
Jensen, E. J., J. B. Smith,
L. Pfister, J. V. Pittman, E. M. Weinstock,
D. S. Sayres, R. L. Herman, R. F. Troy, K.
Rosenlof, T. L. Thompson, A. M. Fridlind,
P. K. Hudson, D. J. Cziczo, A. J. Heymsfield,
C. Schmitt, and J. C. Wilson. 2005. Ice Supersaturations
Exceeding 100% at the Cold Tropical Tropopause:
Implications for Cirrus Formation and Dehydration.
Atmos. Chem. Phys., 5: 851–862. |
Jensen, E. J., and L. Pfister.
2005. Implications of Persistent Supersaturation
with Respect to Ice in Cold Cirrus For Stratospheric
Water Vapor. Geophys. Res. Lett.,
32, doi:10.1029/2004GL021125. |
Jensen, E. J., L. Pfister, T.-P.
Bui, A. Weinheimer, E. Weinstock, J. Smith,
J. Pittman, D. Baumgardner, and M. J. McGill.
2005. Formation of a Tropopause Cirrus Layer
Observed over Florida during CRYSTALFACE.
J. Geophys. Res., 110, doi:10.1029/2004JD004671. |
Fridlind, A. M., A. S. Ackerman,
E. J. Jensen, A. J. Heymsfield, M. R. Poellot,
D. E. Stevens, D. Wang, L. M. Miloshevich,
D. Baumgardner, R. P. Lawson, J. C. Wilson,
R. C. Flagan, J. H. Seinfeld, H. H. Jonsson,
T. M. VanReken, V. Varutbangkul, and T. A.
Rissman. 2004. Evidence for the predominance
of mid-tropospheric aerosols as subtropical
anvil cloud nuclei. Science, 34:
718–722. |
Jensen, E. J., and L. Pfister.
2004. Transport and freeze-drying in the tropical
tropopause layer. J. Geophys. Res.,
109, doi:10.1029/2003JD004022. |
Jensen, E. J., and K. Drdla.
2002b. Nitric acid concentrations near the
tropical tropopause: Implications for the
properties of tropical nitric acid trihydrate
clouds. Geophys. Res. Lett., 29,
doi:10.1029/2002GS015190. |
Jensen, E. J., O. B. Toon, A.
Tabazadeh, and K. Drdla. 2002a. Impact of
Polar Stratospheric Cloud Particle Composition,
Number Density, and Lifetime on Denitrification.
J. Geophys. Res., 107, doi:1029/2001JD000440. |
Santee, M. L., A. Tabazadeh,
G. L. Manney, M. D. Fromm, R. M. Bevilacqua,
J. W. Waters, and E. J. Jensen. 2002. A Lagrangian
approach to studying Arctic polar stratospheric
clouds using UARS MLS HNO and POAM II aerosol
extinction measurements. J. Geophys. Res.,
107, 2000JD000227. |
Rapp, M., F.-J. Lubken, A. Mullemann,
G. E. Thomas, and E. J. Jensen. 2002. Small-scale
temperature variations in the vicinity of
NLC: Experimental and model results. J.
Geophys. Res., 107, doi:10.1029/2001JD001241. |
Pfister, L., H. B. Selkirk,
E. Jensen, J. Podolske, G. Sachse, M. Avery,
M. R. Schoeberl, M. J. Mahoney, and E. Richard.
2002. Processes controlling water vapor in
the winter Arctic tropopause region. J.
Geophys. Res., 108, doi:10.1029/2001JD00106717. |
Lin, R. F., D. O. Starr, P.
J. DeMott, W. Cotton, K. Sassen, E. Jensen,
B. Karcher, and X. Liu. 2002. Cirrus Parcel
Model Comparison Project. Phase 1: The critical
components to simulate cirrus initiation explicitly.
J. Atmos. Sci., 59: 2305–2329. |
Jensen, E. J., et al. 2001b.
Prevalence of ice supersaturated regions in
the upper troposphere: Implications for optically
thin ice cloud formation. J. Geophys.
Res., 106, 17253–17266. |
Jensen, E. J., L. Pfister, A.
S. Ackerman, O. B. Toon, and A. Tabazadeh.
2001a. A Conceptual Model of the Dehydration
of Air Due to Freeze-drying by Optically Thin,
Laminar Cirrus Rising Slowly Across the Tropical
Tropopause. J. Geophys. Res., 106,
17237–17252. |
Pfister, L., H. B. Selkirk,
E. J. Jensen, M. R. Schoeberl, O. B. Toon,
E. V. Browell, W. B. Grant, B. Gary, M. J.
Mahoney, T. V. Bui, and E. Hintsa. 2001. Aircraft
observations of thin cirrus clouds near the
tropical tropopause. J. Geophys. Res.,
106, 9765–9786. |
Stone, E. M., A. Tabazadeh,
E. Jensen, H. C. Pumphrey, M. L. Santee, and
J. L. Mergenthaler. 2001. Onset, extent, and
duration of dehydration in the Southern Hemisphere
polar vortex. J. Geophys. Res., 106,
22,979–22,990. |
Vay, S. A., B. E. Anderson,
E. J. Jensen, G. W. Sachse, J. Ovarlez, G.
L. Gregory, S. R. Nolf, J. R. Podolske, T.
A. Slate, and C. E. Sorenson. 2001. Tropospheric
water vapor measurements over the North Atlantic
during the Subsonic Assessment Ozone and Nitrogen
Oxide Experiment (SONEX), J. Geophys.
Res., 105, 3745–3756. |
Tabazadeh, A., E. J. Jensen,
O. B. Toon, K. Drdla, and M. R. Schoeberl.
2001. Role of the stratospheric polar freezing
belt in denitrification. Science,
291, 2591–2594. |
Sandor, B. J., E. J. Jensen,
E. M. Stone, W. G. Read, J. W. Waters, and
J. L. Mergenthaler. 2000. Upper tropospheric
humidity and thin cirrus. Geophys. Res.
Lett., 27, 2645-2648. |
Jensen, E. J., W. G. Read, J.
Mergenthaler, B. J. Sandor, L. Pfister, and
A. Tabazadeh. 1999. High humidities and subvisible
cirrus near the tropical tropopause. Geophys.
Res. Lett., 26, 2347. |
Tabazadeh, A., O. B. Toon, and
E. J. Jensen. 1999. A surface chemistry model
for nonreactive trace gas adsorption on ice:
Implications for nitric acid scavenging by
cirrus. Geophys. Res. Lett., 26,
2211– 2214. |
Anderson, B. E., W. R. Cofer,
J. Crawford, G. L. Gregory, S. A. Vay, K.
E. Brunke, Y. Kondo, M. Koike, H. Schlager,
S. L. Baughcum, E. Jensen, Y. Zhao, and K.
Kita. 1999. An assessment of aircraft as a
source of particles to the upper troposphere,
Geophys. Res. Lett., 26, 3069–3072. |
Jensen, E. J., O. B. Toon, A.
Tabazadeh, G. W. Sachse, B. E. Anderson, K.
R. Chan, D. Baumgardner, C. Twohy, B. Gandrud,
A. Heymsfield, S. Aulenbach, J. Hallett, and
B. L. Gary. 1998d. Ice nucleation processes
in upper tropospheric wave-clouds observed
during SUCCESS. Geophys. Res. Lett.,
25, 1363. |
Jensen, E. J., O. B. Toon, R.
F. Pueschel, J. Goodman, G. W. Sachse, B.
E. Anderson, D. Baumgardner, and R. C. Miake-Lye.
1998c. Ice crystal nucleation and growth in
contrails forming at low ambient temperatures.
Geophys. Res. Lett., 25, 1371. |
Jensen, E. J., A. S. Ackerman,
D. E. Stevens, O. B. Toon, and P. Minnis.
1998b. Spreading and growth of contrails in
a sheared environment. J. Geophys. Res.,
103, 31557–31569 |
Jensen, E. J., O. B. Toon, S.
Kinne, G. W. Sachse, B. E. Anderson, K. R.
Chan, C. H. Twohy, B. Gandrud, A. Heymsfield,
and R. C. Miake-Lye. 1998a. Environmental
conditions required for contrail formation
and persistence. J. Geophys. Res.,
103, 3929–3936. |
Weinheimer, A. J., T. L. Campos,
J. G. Walega, F. E. Walega, F. E. Grahek,
B. A. Ridley, D. Baumgardner, C. H. Twohy,
B. Gandrud, and E. Jensen. 1998. Uptake of
NOy on wave cloud ice particles. Geophys.
Res. Lett., 25, 1327. |
Goodman, J., R. F. Pueschel,
E. J. Jensen, S. Verma, G. V. Ferry, S. D.
Howard, S. Kinne, and D. Baumgardner. 1998.
Shape and size of contrail ice particles.
Geophys. Res. Lett., 25, 1327–1330. |
Karcher, B., R. Busen, A. Petzold,
F. P. Schroder, U. Schumann, and E. J. Jensen.
1998. Physicochemistry of aircraft-generated
liquid aerosols, soot, and ice particles,
2, Comparison with observations and sensitivity
studies. J. Geophys. Res., 103, 7,129–17,148. |
Jensen, E. J., and O. B. Toon.
1997. The potential impact of soot particles
from aircraft exhaust on cirrus clouds. Geophys.
Res. Lett., 24, 249. |
Tabazadeh, A., E. J. Jensen,
and O. B. Toon. 1997. A model description
for cirrus cloud nucleation from homogeneous
freezing of sulfate aerosols. J. Geophys.
Res., 102, 23,845–23,850. |
Tabazadeh, A., O. B. Toon, and
E. J. Jensen. 1997. Formation and implications
of ice particle nucleation in the stratosphere.
J. Geophys. Res., 102, 23,845–23,850. |
Jensen, E. J., O. B. Toon, D.
Spinhirne, and H. B. Selkirk. 1996a. On the
formation and persistence of subvisible cirrus
clouds near the tropical tropopause. J.
Geophys. Res., 101, 21361. |
Jensen, E. J., O. B. Toon, D.
L. Westphal, and S. Kinne. 1994c. Microphysical
modeling of cirrus part I: Comparison with
1986 FIRE IFO measurements. J. Geophys.
Res., 99, 10421–10442. |
Jensen, E. J., O. B. Toon, D.
L. Westphal, S. Kinne, and A. Heymsfield.
1994b. Microphysical modeling of cirrus part
2: Sensitivity studies. J. Geophys. Res.,
99, 10,443–10,454. |
Jensen, E. J., and G. E. Thomas.
1994. Numerical simulations of the effects
of gravity waves on noctilucent clouds.
J. Geophys. Res., 99, 3421–3430. |
Jensen, E. J., and O. B. Toon.
1994. Ice nucleation in the upper troposphere:
Sensitivity to aerosol number density, temperature,
and cooling rate. Geophys. Res. Lett.,
21, 2019–2022. |
Jensen, E. J., S. Kinne, and
O. B. Toon. 1994a. Tropical cirrus cloud radiative
forcing: Sensitivity studies. Geophys.
Res. Lett., 21, 2023–2026. |
Jacobson, M. Z., R. P. Turco,
E. J. Jensen, and O. B. Toon. 1994. Modeling
coagulation among particles of different composition
and size. Atmos. Env., 28, 1327–1338. |
Jensen, E. J., O. B. Toon, and
P. Hamill. 1991. Homogeneous freezing nucleation
of stratospheric solution droplets. Geophys.
Res. Lett., 18, 1857–1860. |
Jensen, E. J., and G. E. Thomas.
1991. Charging of mesospheric particles: Implications
for electron density and particle coagulation.
J. Geophys. Res., 96, 18,603–18,615. |
Thomas, G. E., R. D. McPeters,
and E. J. Jensen. 1991. Satellite observations
of polar mesospheric clouds by the solar backscattered
ultraviolet spectral radiometer: Evidence
of a solar cycle dependence. J. Geophys.
Res., 96, 927–939. |
Rusch, D. W., G. E. Thomas,
and E. J. Jensen. 1991. Particle size distributions
in polar mesospheric clouds derived from solar
mesosphere explorer measurements. J. Geophys.
Res., 96, 12,933–12,939. |
Jensen, E., G. Thomas, and O.
B. Toon. 1989. On the diurnal variation of
noctilucent clouds. J. Geophys. Res.,
94, 14,693–14,702. |
Thomas, G. E., J. J. Olivero,
E. J. Jensen, W. Schroeder, and O. B. Toon.
1989. Relation between increasing methane
and the presence of ice clouds at the mesopause.
Nature, 338, 490–492. |
Jensen, E., and G. Thomas. 1988.
A growth - sedimentation model of polar mesospheric
clouds: Comparison with SME measurements.
J. Geophys. Res., 93, 2461–2473. |
Jensen, E. J., G. E. Thomas,
B. B. Balsley. 1988. On the statistical correlation
between polar mesospheric cloud occurrences
and enhanced mesospheric radar echoes. Geophys.
Res. Lett., 15, 315–318. |
Jensen, E. J., W. G. Read, J.
Mergenthaler, B. J. Sandor, L. Pfister, and
A. Tabazadeh. 1999. High humidities and subvisible
cirrus near the tropical tropopause. Geophys.
Res. Lett., 26, 2347. |
Tabazadeh, A., O. B. Toon, and
E. J. Jensen. 1999. A surface chemistry model
for nonreactive trace gas adsorption on ice:
Implications for nitric acid scavenging by
cirrus. Geophys. Res. Lett., 26,
2211– 2214. |
Anderson, B. E., W. R. Cofer,
J. Crawford, G. L. Gregory, S. A. Vay, K.
E. Brunke, Y. Kondo, M. Koike, H. Schlager,
S. L. Baughcum, E. Jensen, Y. Zhao, and K.
Kita. 1999. An assessment of aircraft as a
source of particles to the upper troposphere,
Geophys. Res. Lett., 26, 3069–3072. |
Jensen, E. J., O. B. Toon, A.
Tabazadeh, G. W. Sachse, B. E. Anderson, K.
R. Chan, D. Baumgardner, C. Twohy, B. Gandrud,
A. Heymsfield, S. Aulenbach, J. Hallett, and
B. L. Gary. 1998d. Ice nucleation processes
in upper tropospheric wave-clouds observed
during SUCCESS. Geophys. Res. Lett.,
25, 1363. |
Jensen, E. J., O. B. Toon, R.
F. Pueschel, J. Goodman, G. W. Sachse, B.
E. Anderson, D. Baumgardner, and R. C. Miake-Lye.
1998c. Ice crystal nucleation and growth in
contrails forming at low ambient temperatures.
Geophys. Res. Lett., 25, 1371. |
Jensen, E. J., A. S. Ackerman,
D. E. Stevens, O. B. Toon, and P. Minnis.
1998b. Spreading and growth of contrails in
a sheared environment. J. Geophys. Res.,
103, 31557–31569 |
Jensen, E. J., O. B. Toon, S.
Kinne, G. W. Sachse, B. E. Anderson, K. R.
Chan, C. H. Twohy, B. Gandrud, A. Heymsfield,
and R. C. Miake-Lye. 1998a. Environmental
conditions required for contrail formation
and persistence. J. Geophys. Res.,
103, 3929–3936. |
Weinheimer, A. J., T. L. Campos,
J. G. Walega, F. E. Walega, F. E. Grahek,
B. A. Ridley, D. Baumgardner, C. H. Twohy,
B. Gandrud, and E. Jensen. 1998. Uptake of
NOy on wave cloud ice particles. Geophys.
Res. Lett., 25, 1327. |
Goodman, J., R. F. Pueschel,
E. J. Jensen, S. Verma, G. V. Ferry, S. D.
Howard, S. Kinne, and D. Baumgardner. 1998.
Shape and size of contrail ice particles.
Geophys. Res. Lett., 25, 1327–1330. |
Karcher, B., R. Busen, A. Petzold,
F. P. Schroder, U. Schumann, and E. J. Jensen.
1998. Physicochemistry of aircraft-generated
liquid aerosols, soot, and ice particles,
2, Comparison with observations and sensitivity
studies. J. Geophys. Res., 103, 7,129–17,148. |
Jensen, E. J., and O. B. Toon.
1997. The potential impact of soot particles
from aircraft exhaust on cirrus clouds. Geophys.
Res. Lett., 24, 249. |
Tabazadeh, A., E. J. Jensen,
and O. B. Toon. 1997. A model description
for cirrus cloud nucleation from homogeneous
freezing of sulfate aerosols. J. Geophys.
Res., 102, 23,845–23,850. |
Tabazadeh, A., O. B. Toon, and
E. J. Jensen. 1997. Formation and implications
of ice particle nucleation in the stratosphere.
J. Geophys. Res., 102, 23,845–23,850. |
Jensen, E. J., O.B. Toon, L. Pfister, and H. B. Selkirk. 1996b. Dehydration of the upper troposphere and lower stratosphere by subvisible cirrus clouds near the tropical tropopause. Geophys. Res. Lett., 23, 825– 828. |
Jensen, E. J., O. B. Toon, D.
Spinhirne, and H. B. Selkirk. 1996a. On the
formation and persistence of subvisible cirrus
clouds near the tropical tropopause. J.
Geophys. Res., 101, 21361. |
Jensen, E. J., O. B. Toon, D.
L. Westphal, and S. Kinne. 1994c. Microphysical
modeling of cirrus part I: Comparison with
1986 FIRE IFO measurements. J. Geophys.
Res., 99, 10421–10442. |
Jensen, E. J., O. B. Toon, D.
L. Westphal, S. Kinne, and A. Heymsfield.
1994b. Microphysical modeling of cirrus part
2: Sensitivity studies. J. Geophys. Res.,
99, 10,443–10,454. |
Jensen, E. J., and G. E. Thomas.
1994. Numerical simulations of the effects
of gravity waves on noctilucent clouds.
J. Geophys. Res., 99, 3421–3430. |
Jensen, E. J., and O. B. Toon.
1994. Ice nucleation in the upper troposphere:
Sensitivity to aerosol number density, temperature,
and cooling rate. Geophys. Res. Lett.,
21, 2019–2022. |
Jensen, E. J., S. Kinne, and
O. B. Toon. 1994a. Tropical cirrus cloud radiative
forcing: Sensitivity studies. Geophys.
Res. Lett., 21, 2023–2026. |
Jacobson, M. Z., R. P. Turco,
E. J. Jensen, and O. B. Toon. 1994. Modeling
coagulation among particles of different composition
and size. Atmos. Env., 28, 1327–1338. |
Jensen, E. J. and O. B. Toon. 1992. The potential effects of volcanic aerosols on cirrus cloud microphysics. Geophys. Res. Lett., 19, 1759–1762. |
Jensen, E. J., O. B. Toon, and
P. Hamill. 1991. Homogeneous freezing nucleation
of stratospheric solution droplets. Geophys.
Res. Lett., 18, 1857–1860. |
Jensen, E. J., and G. E. Thomas.
1991. Charging of mesospheric particles: Implications
for electron density and particle coagulation.
J. Geophys. Res., 96, 18,603–18,615. |
Thomas, G. E., R. D. McPeters,
and E. J. Jensen. 1991. Satellite observations
of polar mesospheric clouds by the solar backscattered
ultraviolet spectral radiometer: Evidence
of a solar cycle dependence. J. Geophys.
Res., 96, 927–939. |
Rusch, D. W., G. E. Thomas,
and E. J. Jensen. 1991. Particle size distributions
in polar mesospheric clouds derived from solar
mesosphere explorer measurements. J. Geophys.
Res., 96, 12,933–12,939. |
Jensen, E., G. Thomas, and O.
B. Toon. 1989. On the diurnal variation of
noctilucent clouds. J. Geophys. Res.,
94, 14,693–14,702. |
Thomas, G. E., J. J. Olivero,
E. J. Jensen, W. Schroeder, and O. B. Toon.
1989. Relation between increasing methane
and the presence of ice clouds at the mesopause.
Nature, 338, 490–492. |
Jensen, E., and G. Thomas. 1988.
A growth - sedimentation model of polar mesospheric
clouds: Comparison with SME measurements.
J. Geophys. Res., 93, 2461–2473. |
Jensen, E. J., G. E. Thomas,
B. B. Balsley. 1988. On the statistical correlation
between polar mesospheric cloud occurrences
and enhanced mesospheric radar echoes. Geophys.
Res. Lett., 15, 315–318. |
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