| 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. |
|
