1 SRI International, Menlo Park, CA
description
Transcript of 1 SRI International, Menlo Park, CA
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John Livingston1, Jens Redemann2, Philip Russell3, Stephanie Ramirez2, Qin Zhang2, Omar Torres4, Edward Browell5, John Hair5, Y. Shinozuka6, Cameron McNaughton6,
Antony Clarke6, Alexander Smirnov4, Brent Holben4
1SRI International, Menlo Park, CA
2BAERI, Sonoma, CA3NASA Ames, Moffett Field, CA 4NASA Goddard, Greenbelt, MD
5NASA Langley, Hampton, VA6U. Hawaii, HI
Aura Validation & Science Team
MeetingBoulder, CO
Sep 2006
Aerosol Optical Depths from Airborne
Sunphotometry in INTEX-B/MILAGRO as a Validation Tool for the Ozone Monitoring Instrument
(OMI) on Aura
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AATS-14AATS-14
CARCAR
RSPRSP
SSFR
NavMetNavMet
POSPOS
J31 in INTEX-B/MILAGRO: Instrument Locations
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Livingston/Russell, Aura ST, Boulder, Sep 2006
14-channel Ames Airborne Tracking
Sunphotometer (AATS-14)
Measures: Solar direct-beam transmission, T, at 14 wavelengths,=353-2139 nm
Data products Aerosol optical depth (AOD)
at 13 , 353-2139 nm Water vapor column content
[using T(940 nm)] Aerosol extinction,
340-2139 nm Water vapor
density
When A/Cflies vertical profiles
}
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Livingston/Russell, Aura ST, Boulder, Sep 2006
INTEX-B/MILAGRO J31 made 13 science flights out of Veracruz
to Mexico City and over Gulf of Mexico
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Livingston/Russell, Aura ST, Boulder, Sep 2006
Tampico
0 10 20 30 40 50 km10
VER 1, 3 Mar 2006
INTEX-B/MILAGRO J31 Flight Track zmax=10.0 km
98 W 96
W 94
W
Mexico City
Veracruz
VER 6, 10 Mar 2006VER 11, 17 Mar 2006VER 13, 19 Mar 2006
4 J31 flights have AOD data coincident or near-coincident with OMI-UV AOD data
This talk focuses on 2 flights:
10 Mar (over Gulf)19 Mar (over Mexico City)
Primary OMI UV aerosol product: absorption optical depth.Comparisons here are extinction optical depth
INTEX-B/MILAGRO
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Livingston/Russell, Aura ST, Boulder, Sep 2006
Goal: Compare Aerosol Optical Depth (AOD) from AATS Measurements and OMI Retrievals
Background Example:MODIS-Aqua AOD Cells, with J31 flight track from INTEX-A superimposed
Russell et al., JGR, in review, 2006
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Livingston/Russell, Aura ST, Boulder, Sep 2006
Background Example:Comparison of Aerosol Optical Depth (AOD)from MODIS-Aqua and AATS-14 in INTEX-A
Russell et al., JGR, in review, 2006
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Livingston/Russell, Aura ST, Boulder, Sep 2006
MO
DIS
MO
DIS
Russell et al., JGR, in review, 2006
Background Example:Comparisons of Aerosol Optical Depth (AOD)
from MODIS-Terra &-Alpha with AATS-14 in INTEX-A
AATS-14AATS-14
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Livingston/Russell, Aura ST, Boulder, Sep 2006
INTEX-B: 10 Mar 2006 J31 flight track on MODIS-Aqua true-color image, ~19:57 UT
Grid cells for Grid cells for OMI AODsOMI AODs
Aura/OMI overpass: 20:13 UT
A-T
rain
, ~1
5 min
ute
s
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Livingston/Russell, Aura ST, Boulder, Sep 2006
J31/AATS Profiles Show Altitudes of Extinction Layers
AODAOD Extinction [1/km]Extinction [1/km]
Alti
tude
[km
]A
ltitu
de [
km]
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Livingston/Russell, Aura ST, Boulder, Sep 2006
Comparison of AOD spectra from AATS & OMI 10 Mar 2006
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Livingston/Russell, Aura ST, Boulder, Sep 2006
Comparison of AOD spectra from AATS & OMI 10 Mar 2006
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Livingston/Russell, Aura ST, Boulder, Sep 2006
Tampico
0 10 20 30 40 50 km10
VER 1, 3 Mar 2006
INTEX-B/MILAGRO J31 Flight Track zmax=10.0 km
98 W 96
W 94
W
Mexico City
Veracruz
VER 6, 10 Mar 2006VER 11, 17 Mar 2006VER 13, 19 Mar 2006
4 J31 flights have AOD data coincident or near-coincident with OMI AOD data
2nd flight: 19 Mar
(over Mexico City)
Very difficult case for validation (spatial structure, AATS altitude). Interesting case & rich data set (AERONET, DC-8 lidar + in situ, other J31 sensors.
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Livingston/Russell, Aura ST, Boulder, Sep 2006
19 Mar 2006 J31 flight track on MODIS-Aqua true-color image, ~19:52 UT
Aura/OMI overpass: 20:07 UT
A-T
rain
, ~1
5 min
ute
s
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Livingston/Russell, Aura ST, Boulder, Sep 2006
Photo from DC-8 over Mexico City, 19 Mar 2006Courtesy of Cam McNaughton
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Livingston/Russell, Aura ST, Boulder, Sep 2006
glint angle, satellite elev viewing angle printed in blue to left of each OMI location
J31 Flight Track, 19 Mar 2006, Mexico City & Downwind
Aura overpass: 20.11 UT
AERO-NET
Colored Dots:OMI AOD Grid Cell Centers
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Livingston/Russell, Aura ST, Boulder, Sep 2006
NNE of Mexico City
T2 N of T1
“Visibility poor. Eyes burning in cockpit.”
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Livingston/Russell, Aura ST, Boulder, Sep 2006
AERONET T2
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Livingston/Russell, Aura ST, Boulder, Sep 2006
Aura overpass: 20.11 UT
AERONET AOD at T2, 19 Mar 2006
T2 N of T1J31/AATS: ~460 m above T2, ~780 m above T1
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Livingston/Russell, Aura ST, Boulder, Sep 2006
Comparison of OMI, AATS, & AERONET AOD at T2, 19 Mar 2006
AATS ~460 m above ground;Above much of AOD
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Livingston/Russell, Aura ST, Boulder, Sep 2006
glint angle, satellite elev viewing angle printed in blue to left of each OMI location
J31 Flight Track, 19 Mar 2006, Mexico City & Downwind
Aura overpass: 20.11 UT
AERO-NET
Colored Dots:OMI AOD Grid Cell Centers
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Livingston/Russell, Aura ST, Boulder, Sep 2006
J31/AATS around T0 ~20.41-20.48 UT
~480 m above T0, ~510 m above ground“Much clearer as we approach T0.”
AATS AOD at T0, 19 Mar 2006: Less spatial variability, more wavelength dependence
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Livingston/Russell, Aura ST, Boulder, Sep 2006
Surface albedo effect?
Comparison of OMI, AATS, & AERONET AOD at T0 & T0-A, 19 Mar 2006
AERONET, T0-A
AATS-14, T0
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AATS-14AATS-14
CARCAR
RSPRSP
SSFR
NavMetNavMet
POSPOS
Other J31 instruments measure surface albedo (SSFR) and BRDF (RSP & CAR)
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Livingston/Russell, Aura ST, Boulder, Sep 2006
T2-------------------------T1----------------------------T0--------------------------------
Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO
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Livingston/Russell, Aura ST, Boulder, Sep 2006
T2-------------------------T1----------------------------T0--------------------------------
Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO
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Livingston/Russell, Aura ST, Boulder, Sep 2006
T2-------------------------T1----------------------------T0--------------------------------
Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO
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Livingston/Russell, Aura ST, Boulder, Sep 2006
T2-------------------------T1----------------------------T0--------------------------------
Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO
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Livingston/Russell, Aura ST, Boulder, Sep 2006
T2-------------------------T1----------------------------T0--------------------------------
Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO
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Livingston/Russell, Aura ST, Boulder, Sep 2006
T2-------------------------T1----------------------------T0--------------------------------
Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO
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Livingston/Russell, Aura ST, Boulder, Sep 2006
T2-------------------------T1----------------------------T0--------------------------------
Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO
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Livingston/Russell, Aura ST, Boulder, Sep 2006
T2-------------------------T1----------------------------T0--------------------------------
Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO
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Livingston/Russell, Aura ST, Boulder, Sep 2006
T2-------------------------T1----------------------------T0--------------------------------
Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO
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Livingston/Russell, Aura ST, Boulder, Sep 2006
T2-------------------------T1----------------------------T0--------------------------------
Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO
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Livingston/Russell, Aura ST, Boulder, Sep 2006
T2-------------------------T1----------------------------T0--------------------------------
Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO
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Livingston/Russell, Aura ST, Boulder, Sep 2006
T2-------------------------T1----------------------------T0--------------------------------
Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO
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Livingston/Russell, Aura ST, Boulder, Sep 2006
T2-------------------------T1----------------------------T0--------------------------------
Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO
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Livingston/Russell, Aura ST, Boulder, Sep 2006
T2-------------------------T1----------------------------T0--------------------------------
Coordination of DC-8 and J31 Flights, 19 Mar 2006,INTEX-B/MILAGRO
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Livingston/Russell, Aura ST, Boulder, Sep 2006
E. Browell, J. Hair et al.
DC-8 over J31 between T1 & T0, 20:15 UT
DC-8 over J31 NW of T0, 20:28 UT
19:25 UT, DC-8 over J31 at T2
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Livingston/Russell, Aura ST, Boulder, Sep 2006
E. Browell, J. Hair et al.Large depolarization suggests dust: consistent with AOD -dep
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Livingston/Russell, Aura ST, Boulder, Sep 2006
Y. Shinozuka, A. Clarke
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Livingston/Russell, Aura ST, Boulder, Sep 2006
Summary (work in progress) 4 days of OMI-J31 coincidence (so far) 10 Mar over Gulf: OMI & AATS AODs agree for OMI cells closest to J31 min-alt leg. More cells possible by extending allowed range of OMI SSA
3 Mar (not shown) similar agreement over Gulf 19 Mar, Mexico City: Much more complicated, but richer data set. - DC-8 lidar, in situ - Not Shown: J31 RSP (goal: AOD, size, nr, ni, shape retrievals below J31) - Surface albedo (J31 SSFR) & BRDF (J31 RSP & CAR)
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Livingston/Russell, Aura ST, Boulder, Sep 2006
End of Presentation
Remaining Slides are Backup
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AATS-14AATS-14
CARCAR
RSPRSP
SSFR
NavMetNavMet
POSPOS
J31 in INTEX-B/MILAGRO: Instrument Locations
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Livingston/Russell, Aura ST, Boulder, Sep 2006
E. Browell, J. Hair et al.
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Livingston/Russell, Aura ST, Boulder, Sep 2006
Y. Shinozuka, A. Clarke
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Livingston/Russell, Aura ST, Boulder, Sep 2006
Y. Shinozuka, A. Clarke
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Aerosol Optical Depths from Airborne
Sunphotometry in INTEX-B/MILAGRO as a Validation Tool for the Ozone Monitoring Instrument
(OMI) on Aura
Aura Validation & Science Team
MeetingBoulder, CO
Sep 2006
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Livingston/Russell, Aura ST, Boulder, Sep 2006
10 Mar 2006, J31 Flight VER 05 Altitude & AOD on first descent
UT
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Livingston/Russell, Aura ST, Boulder, Sep 2006
J31 in INTEX-B/MILAGRO: PayloadAmes
Airborne
Tracking
Sun-
photometer
(AATS)
Solar Spectral Flux Radiometer (SSFR)
Research Scanning Polarimeter (RSP)
Cloud Absorption Radiometer (CAR)
Position & Orientation System (POS) Met Sensors & Nav/Met Data System
(RSP)
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Livingston/Russell, Aura ST, Boulder, Sep 2006
BACKGROUNDMODIS-Terra cloud &
aerosol products, 10 Mar 2006
with J31 flight track superimposed
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Livingston/Russell, Aura ST, Boulder, Sep 2006
Goal: Compare Aerosol Optical Depth (AOD) from AATS Measurements and OMI Retrievals
BACKGROUNDMODIS-Terra AOD
Field, 10 Mar 2006
with J31 flight track
superimposed
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Livingston/Russell, Aura ST, Boulder, Sep 2006
March 10, March 10, 2006. MODIS-2006. MODIS-
Terra/J31 Terra/J31 coincidence coincidence over Gulf of over Gulf of
MexicoMexico
MODIS/AATSMODIS/AATS
Wavelengths (nm)Wavelengths (nm)
470 / 453
550 / 519
870 / 864
2140 / 2139
MODISMODIS AATS-14AATS-14
J. Redemann, J. Livingston et al.
Comparison of Aerosol Optical Depth (AOD)from MODIS-Terra and AATS-14 in INTEX-B
PRELIMINARY DATA
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Livingston/Russell, Aura ST, Boulder, Sep 2006
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Livingston/Russell, Aura ST, Boulder, Sep 2006
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Livingston/Russell, Aura ST, Boulder, Sep 2006
glint angle, satellite elev viewing angle printed in blue to left of each OMI location
19 Mar 2006, Mexico City
Aura overpass: 20.11 UT
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Livingston/Russell, Aura ST, Boulder, Sep 2006
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Livingston/Russell, Aura ST, Boulder, Sep 2006
AERONET AOD at T0-A, 19 Mar 2006
J31/AATS around T0
~20.41-20.48 UT
~480 m above T0
Aura overpass: 20.11 UT
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Livingston/Russell, Aura ST, Boulder, Sep 2006
Aeronet T2; AATS near and SW of T2, NNW of T1
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Livingston/Russell, Aura ST, Boulder, Sep 2006
Aeronet T1; AATS near and SW of T2, NNW of T1
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Livingston/Russell, Aura ST, Boulder, Sep 2006
Aeronet T0; AATS NW of T0
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Livingston/Russell, Aura ST, Boulder, Sep 2006
AERONET T2
AOD Level 1.5 data from MAR 19 of 2006
B. Holben et al.
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Livingston/Russell, Aura ST, Boulder, Sep 2006
AERONET T2
B. Holben et al.
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Livingston/Russell, Aura ST, Boulder, Sep 2006
AERONET T0
AOD Level 1.5 data from MAR 19 of 2006
B. Holben et al.
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Livingston/Russell, Aura ST, Boulder, Sep 2006
AERONET T0
AOD Level 1.0 data from MAR 19 of 2006
B. Holben et al.
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Livingston/Russell, Aura ST, Boulder, Sep 2006
AERONET T0AOD Level 1.0 data from MAR 19 of 2006
B. Holben et al.
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Livingston/Russell, Aura ST, Boulder, Sep 2006
19 Mar 2006 times when DC-8 was above & near J31
(i.e., J31 near DC-8 lidar curtain—if lidar was not turned off or J31 in convergence layer )
19.42 (19:25) near T219.69 (19:41) N of T120:22 ( ) T120.26 (20:16) en route, T1 to T020.46 (20:28) NW of T0
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Livingston/Russell, Aura ST, Boulder, Sep 2006
10 Mar (over Gulf)OMI overpass time: 2013 UT
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Livingston/Russell, Aura ST, Boulder, Sep 2006
glint angle, satellite elev viewing angle printed in blue to left of each OMI location
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Livingston/Russell, Aura ST, Boulder, Sep 2006
AERONET T1 AOD Level 1.0 data from MAR 19 of 2006
B. Holben et al.
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Livingston/Russell, Aura ST, Boulder, Sep 2006
AERONET AOD at T1, 19 Mar 2006
J31/AATS: T2 N of T1 ~460 m above T2, ~780 m above T1
Aura overpass: 20.11 UT
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Livingston/Russell, Aura ST, Boulder, Sep 2006