Presentation is loading. Please wait.

Presentation is loading. Please wait.

Phil Russell 1, John Livingston 2, Beat Schmid 3, Jens Redemann 4, Stephanie Ramirez 4, Qin Zhang 4 and many other contributors 10 Years of Studies Comparing.

Published byEmerald Morris Modified over 8 years ago

Similar presentations

Presentation on theme: "Phil Russell 1, John Livingston 2, Beat Schmid 3, Jens Redemann 4, Stephanie Ramirez 4, Qin Zhang 4 and many other contributors 10 Years of Studies Comparing."— Presentation transcript:

1 Phil Russell 1, John Livingston 2, Beat Schmid 3, Jens Redemann 4, Stephanie Ramirez 4, Qin Zhang 4 and many other contributors 10 Years of Studies Comparing Airborne Sunphotometer and Satellite* Views of Aerosols Over the Ocean AGU Fall Meeting 15 Dec 2006 San Francisco, CA 1 NASA Ames Research Center 2 SRI International 3 Pacific Northwest National Laboratory 4 Bay Area Environmental Research Institute *Nadir-viewing

2 Aerosol Optical Depth Derived from Upward Scattered Solar Radiance AVHRR/NOAA 11, June-Aug., Husar et al., J. Geophys. Res., 102, 16,889, 1997. Airborne Sunphotometer-Satellite* Comparisons Over Ocean TARFOX, 1996 ADAM, 2003 EVE, 2004 INTEX-B, 2006 PRIDE, 2000 CLAMS, 2001 INTEX-A, 2004 SAFARI, 2000 ACE-Asia, 2001 ACE-2, 1997 *Nadir-viewing

3 199619982000200220042006 Airborne Sunphotometer-Satellite* Comparisons Over Ocean TARFOX ACE-2 SAFARI PRiDEACE-Asia CLAMS ADAMEVE INTEX -A-B *Nadir-viewing

4 AATS-14 AATS-6 NASA Ames Airborne Tracking Sunphotometers (AATS-6 & AATS-14)

5 199619982000200220042006 Airborne Sunphotometer-Satellite* Comparisons Over Ocean ATSR-2 AVHRR GMS-5 GOES-8 Satellite Instruments Compared To AATS AODs MISR MAS # MODIS-Aqua MODIS-Terra OMI RSP # SeaWiFS TOMS # Airborne Simulator of Satellite Instrument ~25 journal pubs TARFOX ACE-2 SAFARI PRiDEACE-Asia CLAMS ADAMEVE INTEX -A-B *Nadir-viewing

6 199619982000200220042006 Airborne Sunphotometer-Satellite Comparisons Over Ocean Firsts Enduring Results Recent (Unpublished) Results Prospects for the Future This presentation will emphasize: TARFOX ACE-2 SAFARI PRiDEACE-Asia CLAMS ADAMEVE INTEX -A-B

7 199619982000200220042006 Tests of 2- Angle Space AOD Meas Airborne Sunphotometer-Satellite Comparisons Over Ocean TARFOX ACE-2 SAFARI PRiDEACE-Asia CLAMS ADAMEVE INTEX -A-B

8 1552 UTC 25 July 1996 AATS-6 on C-131A Aerosol Optical Depth (AOD) off US East Coast Retrieved by ATSR-2 on ERS-2  nm [Veefkind et al., GRL 1999] NewJersey Del- Mar- Va Atlantic Ocean

9 (AATS-6) [Veefkind et al., GRL 1999] Comparison of AOD Retrieved by by ATSR-2 and measured by AATS-6 1552 UTC 25 July 1996

10 Aerosol Optical Depth (AOD) Retrieved by by AVHRR on NOAA-14 1845 UTC 25 July 1996 [Veefkind et al., GRL 1999] AATS-6 on C-131A 1842-1906 UTC  nm

11 AATS-6, 1842-1906 UTC (1845 UTC) (1552 UTC) AATS-6, 1842-1906 UTC [Veefkind et al., GRL 1999] Comparison of AOD and Angstrom Exponent, AVHRR and ATSR-2 vs AATS-6 TARFOX, 25 July 1996

12 199619982000200220042006 Tests of 2- Angle Space AOD Meas Tests of MODIS Glint Limits Airborne Sunphotometer-Satellite Comparisons Over Ocean TARFOX ACE-2 SAFARI PRiDEACE-Asia CLAMS ADAMEVE INTEX -A-B

13 Glint Angle ( o ) AOD Difference ( =550nm) AOD Difference vs Glint Angle (MODIS Simulator with 2 different wind speeds in algorithm) TARFOX, 17 July 1996 [Tanré et al., JGR 1999] Current MODIS Glint Angle Limit Pre-TARFOX ESTIMATE of Glint Angle Limit AOD Difference ( =550 nm) Glint angle, º

14 199619982000200220042006 Tests of 2- Angle Space AOD Meas Tests of MODIS Glint Limits Airborne Sunphotometer-Satellite Comparisons Over Ocean TARFOX ACE-2 SAFARI PRiDEACE-Asia CLAMS ADAMEVE INTEX -A-B Tests of MODIS Glint Limits

15 AOD Comparisons, INTEX-A, 29 July 2004 [Russell et al., JGR accepted 2006] 18 MODIS cells, glint angles 29-35º MODIS retrievals, glint angles 29-35º AATS

16 199619982000200220042006 Tests of 2- Angle Space AOD Meas Tests of MODIS Glint Limits First Tests of MODIS Dust Meas Over Water Tests of AVHRR AOD Airborne Sunphotometer-Satellite Comparisons Over Ocean TARFOX ACE-2 SAFARI PRiDEACE-Asia CLAMS ADAMEVE INTEX -A-B

17 Comparisons of AOD from MODIS & AATS in PRiDE [Livingston et al., JGR 2003]

18 199619982000200220042006 Tests of 2- Angle Space AOD Meas Tests of MODIS Glint Limits First Tests of MODIS Dust Meas Over Water Tests of AVHRR AOD Tests of Geostationary (GOES & GMS-5) AOD Airborne Sunphotometer-Satellite Comparisons Over Ocean TARFOX ACE-2 SAFARI PRiDEACE-Asia CLAMS ADAMEVE INTEX -A-B

19 (1845 UTC) (1552 UTC) [Jun Wang et al., JGR 2003a,b] Geostationary Satellite Retrievals of AOD Compared to Airborne Sunphotometer Results GOES vs AATS-6, African Dust in PRIDE GMS5 vs AATS-6 & -14, Mixed Aerosols in ACE-Asia

20 199619982000200220042006 Tests of 2- Angle Space AOD Meas Airborne Sunphotometer-Satellite Comparisons Over Ocean Tests of MISR showing need to restore aerosol model to algorithm Tests of MODIS Glint Limits TARFOX ACE-2 SAFARI PRiDEACE-Asia CLAMS ADAMEVE INTEX -A-B

21 [Schmid et al., JGR 2003] Comparison of AOD Retrieved by by MISR on Terra and Measured by AATS-14 on CV-580

22 199619982000200220042006 Tests of 2- Angle Space AOD Meas Tests of MODIS Glint Limits First Tests of SeaWiFS AOD 4- Algorithm First Tests of MODIS Dust Meas Over Water Tests of AVHRR AOD Tests of GMS-5 AOD Airborne Sunphotometer-Satellite Comparisons Over Ocean TARFOX ACE-2 SAFARI PRiDEACE-Asia CLAMS ADAMEVE INTEX -A-B

23 [Schmid, Hsu et al.]

24 199619982000200220042006 Tests of 2- Angle Space AOD Meas Tests of MODIS Glint Limits First Tests of MODIS AOD at 2 Longest Over Water First Tests of SeaWiFS AOD 4- Algorithm First Tests of MODIS Dust Meas Over Water Tests of AVHRR AOD Tests of GMS-5 AOD Airborne Sunphotometer-Satellite Comparisons Over Ocean TARFOX ACE-2 SAFARI PRiDEACE-Asia CLAMS ADAMEVE INTEX -A-B

25 Redemann et al., GRL 2006 Comparison of AOD From MODIS and AATS During EVE, April 2004 MODIS-TerraMODIS-Aqua

26 199619982000200220042006 Tests of 2- Angle Space AOD Meas Tests of MODIS Glint Limits First Tests of MODIS AOD at 2 Longest Over Water First Tests of SeaWiFS AOD 4- Algorithm First Tests of MODIS Dust Meas Over Water Tests of AVHRR AOD Tests of GMS-5 AOD Airborne Sunphotometer-Satellite Comparisons Over Ocean Tests of Angstrom exponent retrievals TARFOX ACE-2 SAFARI PRiDEACE-Asia CLAMS ADAMEVE INTEX -A-B

27 [Russell et al., JGR accepted 2006] Angstrom Exponent Differences (MODIS- AATS) vs. AATS AOD, from INTEX-A, 2004

28 199619982000200220042006 Tests of 2- Angle Space AOD Meas Tests of MODIS Glint Limits First Tests of MODIS AOD at 2 Longest Over Water First Tests of SeaWiFS AOD 4- Algorithm First 3-Way Comparisons: MODIS-MISR- AATS First Tests of MODIS Dust Meas Over Water Tests of MISR AOD over Water Yield Calib. Change Tests of AVHRR AOD Tests of GMS-5 AOD Airborne Sunphotometer-Satellite Comparisons Over Ocean TARFOX ACE-2 SAFARI PRiDEACE-Asia CLAMS ADAMEVE INTEX -A-B

29 INTEX-B: 10 Mar 2006 J31 flight track on MODIS-Terra true-color image, ~ 1653 UT

30 MODIS + MISR Redemann et al., MILAGRO mtg. Oct 2006 Aerosol Optical Depth (AOD), Terra Overpass, ~1653 UT, 10 Mar 2006, INTEX-B

31 Redemann et al., MILAGRO mtg. Oct 2006 MODIS + = MISR

32 Redemann et al., MILAGRO mtg. Oct 2006 MISR boxes MODIS boxes MISR box 1 MISR box 2 MISR box 3 MISR AATS MODISMODIS

33 199619982000200220042006 Tests of 2- Angle Space AOD Meas Tests of MODIS Glint Limits Tests of OMI UV AOD Over Water First Tests of MODIS AOD at 2 Longest Over Water First Tests of SeaWiFS AOD 4- Algorithm First 3-Way Compar- ison: MODIS-MISR- AATS First Tests of MODIS Dust Meas Over Water Tests of MISR AOD over Water Yield Calib. Change Tests of AVHRR AOD Tests of GMS-5 AOD Airborne Sunphotometer-Satellite Comparisons Over Ocean TARFOX ACE-2 SAFARI PRiDEACE-Asia CLAMS ADAMEVE INTEX -A-B

34 INTEX-B: 10 Mar 2006 J31 flight track on MODIS-Aqua true-color image, ~19:57 UT Grid cells for OMI AODs* *UV Algorithm *UV Algorithm Aura/OMI overpass: 20:13 UT A-Train, ~15 minutes Livingston et al., MILAGRO mtg. Oct 2006

35 Comparison of AOD spectra from AATS & OMI-UV 10 Mar 2006 19.68-20.02 UT J31/AATS measurements Livingston, Torres et al., MILAGRO mtg. Oct 2006

36 Testing CALIPSO vertical profiles of extinction Further testing of retrieved Angstrom exponents , aiming to put realistic error bars on MODIS retrieved  (used to define aerosol size & type) Extend tests of OMI aerosol retrievals to include both multiwavelength & UV (Aura Validation) Tests of satellite AOD retrievals over ice & snow in International Polar Year (ARCTAS/POLARCAT, 2008) Assessment of MODIS AOD over-ocean quality flag: too conservative. Will work with Remer & Tanré to reassess. Prospects for the Future

37 End of Presentation Remaining Slides are Backup

38 Comparisons of MODIS and AATS AOD spectra for 61 MODIS grid cells along the J31 path INTEX-A July-Aug 2004

39 Properties of MODIS grid cells along the J31 path Russell et al., JGR in press 2006 Quality Flag: 1 = Marginal 3 = Very Good

40 199619982000200220042006 Tests of 2- Angle Space AOD Meas Tests of MODIS Glint Limits Tests of OMI UV AOD Over Water First Tests of MODIS AOD at 2 Longest Over Water First Tests of SeaWiFS AOD 4- Algorithm First 3-Way Compar- ison: MODIS-MISR- AATS First Tests of MODIS Dust Meas Over Water Tests of MISR showing need to restore aerosol model to algorithm Tests of AVHRR AOD Tests of Geostationary (GOES & GMS-5) AOD Airborne Sunphotometer-Satellite Comparisons Over Ocean TARFOX ACE-2 SAFARI PRiDEACE-Asia CLAMS ADAMEVE INTEX -A-B

41 13 MODIS grid cells along the J31 path 21 July 2004

42 Comparisons of MODIS and AATS AOD spectra for each MODIS grid cell along the J31 path 21 July 2004

43 Comparisons of MODIS and AATS AOD spectra for each MODIS grid cell along the J31 path 21 July 2004

44 Comparisons of MODIS and AATS AOD spectra for each MODIS grid cell along the J31 path 21 July 2004

45 199619982000200220042006 Tests of 2- Angle Space AOD Meas Tests of MODIS Glint Limits Tests of OMI UV AOD Over Water First Tests of MODIS AOD at 2 Longest Over Water First Tests of SeaWiFS AOD 4- Algorithm First 3-Way Compar- ison: MODIS-MISR- AATS First Tests of MODIS Dust Meas Over Water Tests of MISR AOD over Water Yield Calib. Change Tests of AVHRR AOD Tests of GMS-5 AOD Airborne Sunphotometer-Satellite Comparisons Over Ocean TARFOX ACE-2 SAFARI PRiDEACE-Asia CLAMS ADAMEVE INTEX -A-B

46 Glint Angle ( o ) AOD Difference ( =550nm) AOD Difference vs Glint Angle (MODIS Simulator with 2 different wind speeds in algorithm) TARFOX, 17 July 1996 [Tanré et al., JGR 1999] Current MODIS Glint Angle Limit Pre-TARFOX ESTIMATE of Glint Angle Limit AOD Difference ( =550 nm) Glint angle, º

47 199619982000200220042006 Airborne Sunphotometer-Satellite Comparisons Over Ocean Vertical profiles Stratospheric results (hence DC-8, SOLVE II) Closure with in situ Aerosol radiative forcing Water vapor, ozone, … It excludes: TARFOX ACE-2 SAFARI PRiDEACE-Asia CLAMS ADAMEVE INTEX -A-B SOLVE-II

48 P. Russell, ICARTT Planning Meeting Boulder, CO, 21 Jan 2004 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/C flies vertical profiles }

49 Redemann et al., MILAGRO mtg. Oct 2006 Aerosol Optical Depth (AOD), Terra Overpass, ~1653 UT, 10 Mar 2006, INTEX-B MODIS 550 nm MISR 558 nm

50 A-Train, ~15 minutes INTEX-B: 10 Mar 2006 J31 flight track on MODIS-Aqua AOD(550 nm) map, ~19:57 UT Aura/OMI overpass: 20:13 UT Livingston et al., MILAGRO mtg. Oct 2006

51 P. Russell, ICARTT Planning Meeting Boulder, CO, 21 Jan 2004 Steph to insert Fig. 2 from NOAA-ACC prop here. It won’t paste from my MSWord file into PowerPoint. (1)Survey Vertical Profile. (2) Minimum- Altitude Transect. (3) Parking Garage. (4) Above-Cloud Transect. Planned Flight Patterns, J31 in INTEX-NENA

52 199619982000200220042006 Tests of 2- Angle Space AOD Meas Tests of MODIS Glint Limits Tests of OMI UV AOD Over Water First Tests of MODIS AOD at 2 Longest Over Water First Tests of SeaWiFS AOD 4- Algorithm First 3-Way Compar- ison: MODIS-MISR- AATS First Tests of MODIS Dust Meas Over Water Tests of MISR AOD over Water Yield Calib. Change Tests of AVHRR AOD Tests of GMS-5 AOD Airborne Sunphotometer-Satellite Comparisons Over Ocean TARFOX ACE-2 SAFARI PRiDEACE-Asia CLAMS ADAMEVE INTEX -A-B

53 Ames Airborne Tracking Sunphotometers (AATS) AATS-14 AATS-6

54 199619982000200220042006 Airborne Sunphotometer-Satellite Comparisons Over Ocean ATSR-2 AVHRR GMS-5 GOES-8 MAS* Satellite Instruments Compared To AATS AODs MISR MODIS-Aqua MODIS-Terra OMI POAM-3 RSP* SAGE-3 SeaWiFS TOMS *Airborne Simulator of Satellite Instrument ~25 journal pubs TARFOX ACE-2 SAFARI PRiDEACE-Asia CLAMS ADAMEVE INTEX -A-B

55 199619982000200220042006 Airborne Sunphotometer-Satellite Comparisons Over Ocean Vertical profiles Stratospheric results (hence DC-8, SOLVE II) Closure with in situ Aerosol radiative forcing Water vapor, ozone, … It excludes: TARFOX ACE-2 SAFARI PRiDEACE-Asia CLAMS ADAMEVE INTEX -A-B

56 Clouds and pollutant haze off US East Coast Viewed by ATSR-2 on ERS-2 (865 nm channel) 77 75 73 71 W [Veefkind et al., GRL 1999] 1552 UTC 25 July 1996 NewJersey Del- Mar- Va Atlantic Ocean

Download ppt "Phil Russell 1, John Livingston 2, Beat Schmid 3, Jens Redemann 4, Stephanie Ramirez 4, Qin Zhang 4 and many other contributors 10 Years of Studies Comparing."

Similar presentations

A New A-Train Collocated Product : MODIS and OMI cloud data on the OMI footprint Brad Fisher 1, Joanna Joiner 2, Alexander Vasilkov 1, Pepijn Veefkind.

A New A-Train Collocated Product : MODIS and OMI cloud data on the OMI footprint Brad Fisher 1, Joanna Joiner 2, Alexander Vasilkov 1, Pepijn Veefkind.
Current Ongoing Relevant Aerosol Measurement Issues Satellite Validation —especially newer satellites (OMI/Aura, CALIOP/CALIPSO, ASP/Glory, …) Aerosol.

Current Ongoing Relevant Aerosol Measurement Issues Satellite Validation —especially newer satellites (OMI/Aura, CALIOP/CALIPSO, ASP/Glory, …) Aerosol.
GEOS-5 Simulations of Aerosol Index and Aerosol Absorption Optical Depth with Comparison to OMI retrievals. V. Buchard, A. da Silva, P. Colarco, R. Spurr.

GEOS-5 Simulations of Aerosol Index and Aerosol Absorption Optical Depth with Comparison to OMI retrievals. V. Buchard, A. da Silva, P. Colarco, R. Spurr.
Retrieval of SO 2 Vertical Columns from SCIAMACHY and OMI: Air Mass Factor Algorithm Development Chulkyu Lee, Aaron van Dokelaar, Gray O’Byrne: Dalhousie.

Retrieval of SO 2 Vertical Columns from SCIAMACHY and OMI: Air Mass Factor Algorithm Development Chulkyu Lee, Aaron van Dokelaar, Gray O’Byrne: Dalhousie.
Direct aerosol radiative forcing based on combined A-Train observations – challenges in deriving all-sky estimates Jens Redemann, Y. Shinozuka, M.Kacenelenbogen,

Direct aerosol radiative forcing based on combined A-Train observations – challenges in deriving all-sky estimates Jens Redemann, Y. Shinozuka, M.Kacenelenbogen,
Bastiaan van Diedenhoven (Columbia University, NASA GISS) Ann Fridlind, Andrew Ackerman & Brian Cairns (NASA GISS) An investigation of ice crystal sizes.

Bastiaan van Diedenhoven (Columbia University, NASA GISS) Ann Fridlind, Andrew Ackerman & Brian Cairns (NASA GISS) An investigation of ice crystal sizes.
First Flight of NASA’s Coastal and Ocean Airborne Science Testbed (COAST) L. Guild 1, J. Dungan 1, M. Edwards 1, P. Russell 1, J. Morrow 2, S. Hooker 3,

First Flight of NASA’s Coastal and Ocean Airborne Science Testbed (COAST) L. Guild 1, J. Dungan 1, M. Edwards 1, P. Russell 1, J. Morrow 2, S. Hooker 3,
SeaDAS Training ~ NASA Ocean Biology Processing Group 1 Level-2 ocean color data processing basics NASA Ocean Biology Processing Group Goddard Space Flight.

SeaDAS Training ~ NASA Ocean Biology Processing Group 1 Level-2 ocean color data processing basics NASA Ocean Biology Processing Group Goddard Space Flight.
A Progress Report on Combining MODIS and CALIPSO Aerosol Data for Direct Radiative Effect Studies Jens Redemann, Qin Zhang, Philip Russell, John Livingston,

A Progress Report on Combining MODIS and CALIPSO Aerosol Data for Direct Radiative Effect Studies Jens Redemann, Qin Zhang, Philip Russell, John Livingston,
Trace gas and AOD retrievals from a newly deployed hyper-spectral airborne sun/sky photometer (4STAR) M. Segal-Rosenheimer, C.J. Flynn, J. Redemann, B.

Trace gas and AOD retrievals from a newly deployed hyper-spectral airborne sun/sky photometer (4STAR) M. Segal-Rosenheimer, C.J. Flynn, J. Redemann, B.
Aerosol Optical Depths from Airborne Sunphotometry in INTEX-B/MILAGRO as a Validation Tool for the Ozone Monitoring Instrument (OMI) on Aura J. Livingston.

Aerosol Optical Depths from Airborne Sunphotometry in INTEX-B/MILAGRO as a Validation Tool for the Ozone Monitoring Instrument (OMI) on Aura J. Livingston.
AGU 2002 Fall Meeting NASA Langley Research Center / Atmospheric Sciences Validation of GOES-8 Derived Cloud Properties Over the Southeastern Pacific J.

AGU 2002 Fall Meeting NASA Langley Research Center / Atmospheric Sciences Validation of GOES-8 Derived Cloud Properties Over the Southeastern Pacific J.
The combined use of MODIS, CALIPSO and OMI level 2 aerosol products for calculating direct aerosol radiative effects Jens Redemann, M. Vaughan, Y. Shinozuka,

The combined use of MODIS, CALIPSO and OMI level 2 aerosol products for calculating direct aerosol radiative effects Jens Redemann, M. Vaughan, Y. Shinozuka,
A four year record of Aerosol Absorption measurements from OMI near UV observations Omar Torres Department of Atmospheric and Planetary Sciences Hampton.

A four year record of Aerosol Absorption measurements from OMI near UV observations Omar Torres Department of Atmospheric and Planetary Sciences Hampton.
4STAR: Spectrometer for Sky-Scanning, Sun-Tracking Atmospheric Research Development and Results from First Test-flights A collaboration involving: PNNL:

4STAR: Spectrometer for Sky-Scanning, Sun-Tracking Atmospheric Research Development and Results from First Test-flights A collaboration involving: PNNL:
Variational Assimilation of MODIS AOD using GSI and WRF/Chem Zhiquan Liu NCAR/NESL/MMM Quanhua (Mark) Liu (JCSDA), Hui-Chuan Lin (NCAR),

Variational Assimilation of MODIS AOD using GSI and WRF/Chem Zhiquan Liu NCAR/NESL/MMM Quanhua (Mark) Liu (JCSDA), Hui-Chuan Lin (NCAR),
Aerosol Optical Depth during the Northern CA Fires of 2008 In situ aerosol light scattering and absorption measurements in Reno Nevada, 2008, indicated.

Aerosol Optical Depth during the Northern CA Fires of 2008 In situ aerosol light scattering and absorption measurements in Reno Nevada, 2008, indicated.
T2 T1 (biomass burning aerosol) (dust) Findings (1) OMI and AATS AOD retrievals have been analyzed for four spatially and temporally near-coincident events.

T2 T1 (biomass burning aerosol) (dust) Findings (1) OMI and AATS AOD retrievals have been analyzed for four spatially and temporally near-coincident events.
Jetstream 31 (J31) at Mid-Campaign in INTEX-B/MILAGRO: Science Goals, Payload, Example Results, Assessment Phil Russell, Jens Redemann, Brian Cairns, Charles.

Jetstream 31 (J31) at Mid-Campaign in INTEX-B/MILAGRO: Science Goals, Payload, Example Results, Assessment Phil Russell, Jens Redemann, Brian Cairns, Charles.
Figure 1. (left) Direct comparison of CCN concentration adjusted to 0.4% supersaturation and 499 nm AOD, both observed from ≤1 km altitudes during ARCTAS.

Figure 1. (left) Direct comparison of CCN concentration adjusted to 0.4% supersaturation and 499 nm AOD, both observed from ≤1 km altitudes during ARCTAS.

Similar presentations

Ads by Google