GSFC

GSFC

Glaciation Level and Vertical Profile of Droplet Glaciation Level and Vertical Profile of Droplet Size Associated with Cloud-Aerosol InteractionsSize Associated with Cloud-Aerosol Interactions

(D. (D. Rosenfeld)Rosenfeld)

Glaciation Level and Vertical Profile of Droplet Glaciation Level and Vertical Profile of Droplet Size Associated with Cloud-Aerosol InteractionsSize Associated with Cloud-Aerosol Interactions

(D. (D. Rosenfeld)Rosenfeld)

Clean Polluted

GSFC

Glaciation Level and Vertical Glaciation Level and Vertical Profile of Droplet Size Profile of Droplet Size

Associated Associated with Cloud-Aerosol with Cloud-Aerosol

InteractionsInteractions(D. Rosenfeld)(D. Rosenfeld)

Glaciation Level and Vertical Glaciation Level and Vertical Profile of Droplet Size Profile of Droplet Size

Associated Associated with Cloud-Aerosol with Cloud-Aerosol

InteractionsInteractions(D. Rosenfeld)(D. Rosenfeld)

Clean

Clean Cases

Polluted Cases

GSFC

Scientific Scenario for CLAIM-3D:Scientific Scenario for CLAIM-3D:Scientific Scenario for CLAIM-3D:Scientific Scenario for CLAIM-3D:

Today, Microphysical Effects on Clouds:

•Studied from Cloud Top with many assumptions

•With complicated/limited in situ aircraft measurements.

The CLOUD SCANNER add:•Instantaneous measurements of the cloud vertical profile of microphysics, thermodynamic phase, and cloud 3D properties

•Simultaneous measurements of aerosol properties

Today, Microphysical Effects on Clouds:

•Studied from Cloud Top with many assumptions

•With complicated/limited in situ aircraft measurements.

The CLOUD SCANNER add:•Instantaneous measurements of the cloud vertical profile of microphysics, thermodynamic phase, and cloud 3D properties

•Simultaneous measurements of aerosol properties

GSFC

Cloud Scanner Measurements Cloud Scanner Measurements During the LBA/SMOCC/Racci During the LBA/SMOCC/Racci

Experiment 2002Experiment 2002

Cloud Scanner Measurements Cloud Scanner Measurements During the LBA/SMOCC/Racci During the LBA/SMOCC/Racci

Experiment 2002Experiment 2002

GSFC

GSFC

350 nm) 2500

Ice

Water

350 (nm) 2500

Ice

Water

Ice

Water

Ice

Water

Ice

Water

Clear Sky

Clo

ud

Su

rfac

e

ice

water

Glaciation Level

Clear Sky

Clo

ud

Su

rfac

e

ice

water

Glaciation Level

350 (nm) 2500

Prototype Results

•Thermodynamic Phase •Droplet Size

•Temperature •Aerosol Type + Amount

Aircraft Proof of Concept Aircraft Proof of Concept Cloud Side MeasurementsCloud Side Measurements

Cloud Top

Cloud Base

Glaciation

Conceptual Model

Mixed Phase

5

15

25

35

45

55

0 10 20 30 40 50

Effective Radius (um)

clo

ud

hei

gh

t (A

.U.)

5

15

25

35

45

55

0 2 4 6 8 10 12 14

reflectances 2.1 and 2.25um (A.U.)

clo

ud

hei

gh

t (A

.U.)

Retrieved Eff. Radius

Refl. 2.10um

Refl. 2.25um

0 Effective Radius (m) 50

GSFC

King et. all 1997King et. all 1997King et. all 1997King et. all 1997

GSFC

Reflectances from Side and Top of a

Cylindrical Cloud ( z=50, x=30)

0

1

2

3

4

5

6

7

8

0 0.2 0.4 0.6 0.8 1

Reflectance

hei

ght

(km

) Cloud Top

Cloud Side

2.1 m

0.66m

o = 60, = 40

3-D Radiative Transfer Studies:

GSFC

v=60,

v=180

v=60,v=0

o=60,o=0

v=0,v=0

0 2 4 6

0

2

4

6

x (km)

y (km)

0.00 0.25 0.50 0.75 1.00

v=60,v=902 4 6

2

4

6

x (km)

y (km)

0 25 50 75 100 125 150optical depth

A. Marshak – 3D Cloud Simulation

Input (optical depth)Output

GSFC

100km

Default Simple Scanning ModeThe instrument points towards the illuminated side of the clouds and scans as the satellite moves (see simple scan movie). An extra feature and also descope option can be a second simple camera (between 1 to 3 visible wavelengths for parallax observations of the cloud structure).

Additional 1- view angle for

Parallax(also for descope option)

Multi Spectral Cloud ScannerView direction

GSFC

GSFC

100km

Geometry of the Multi-Angle ScanThe instrument view angle changes from forward to backward geometries as it scans a

selected region (see full scan movie)

~ 400km

GSFC

~ 400km

GSFC

CLAIM-3D Observing Geometry CLAIM-3D Observing Geometry (fig 1)(fig 1)

CLAIM-3D Observing Geometry CLAIM-3D Observing Geometry (fig 1)(fig 1)

Side viewSide view

International collaboration:Enhanced Polder

International collaboration:Enhanced Polder

Cloud ScannerCloud

Scanner

3D view3D view

Min. 100km swath

Cloud Structure And

Vegetation Hot Spot

GSFC

GSFC

GSFC

TMI ImageTMI Image

60dg View 60dg View angleangle

Courtesy of Antony Courtesy of Antony DavisDavis

TMI ImageTMI Image

60dg View 60dg View angleangle

Courtesy of Antony Courtesy of Antony DavisDavis

GSFC

GSFC