AEROCAN support for Activity 4 (Implications of Measurements on Simulations of

Atmospheric Processes and Climate)

N. T. O'Neill, S. Hesaraki, Universite de Sherbrooke, Sherbrooke, Canada

Norm O'Neill, NETCARE workshop, U. of Toronto, Nov. 19, 2013

AEROCAN (Canadian Sunphotometer Network)

Resolute Bay

Saturna IslandBratt’s Lake

Waskesiu

Churchill

Kuujjuarapik

HalifaxSherbrooke

Egbert

Pickle Lake

Fort McKay & McMurray

Kelowna

Chapais

Eureka (PEARL, OPAL)

Toronto

Yellowknife

Iqaluit

Sable Island

Lethbridge

NSHSRLMMCR

CRL, AMSMMCR

KARL

Polarsummer

sites

AERONETAEROCAN / AERONET

Polar summer

NSHSRLMMCR

CRL, AMSMMCR

KARL

Starphotometers Moonphotometers Polar

wintersites

Polar winter

0.001

0.01

0.1

0.1 1 10

dV/d

ln r

(um

3 / um

2 )

radius (um)

Sampling of Oleg’s PSD inversions

What parameters do we compare with the models?

)( )( )( cfa

What parameters do we compare with the models?

These results about a factor of 2 larger than modeling values used in recent publications or about a factor of 5.5 larger in terms of (per particle) backscatter cross section.

0.00

0.05

0.10

0.15

0.20

MAR APR MAY JUN JUL AUG SEP OCT

AO

D (

50

0 n

m)

Barrow NOAA (2001-2011)

Barrow AERONET (1999-2011)

Resolute Bay (2004-2011)

OPAL (2007-2011)

PEARL (2007-2011)

Alert (2004-2011)

Thule (2007-2011)

Kangerlussuaq (2008-2011)

Hornsund (2006-2011)

Ny-Alesund (1991-2011)

Pan-Arctic Aerosol Climatology

0

100

200

300

MAR APR MAY JUN JUL AUG SEP OCT

No

bs

(Day

s)

Barrow NOAABarrow AERONETResolute BayOPALPEARLAlertThuleKangerlussuaqHornsundNy-Alesund

Pan-Arctic AOD Climatology

Barrow-NOAA

Barrow-AERONET PEARL

OPALThule

Resolute Bay

Alert

Hornsund

Ny-Alesund

Kangerlussuaq

Saha et al., 2013

0

0.5

1

1.5

2

0 1 2 3 4

trajectory time (days)

Halifax MDSCSERC GSFCWallops Island EgbertHowland, ME CCNYCOVE Norfolk

MODIS July 8, 2002

0

0.5

1

1.5

2

2.5

0 1 2 3 4

trajectory time (days)

'

0

0.05

0.1

0.15

0.2

0 1 2 3 4

trajectory time (days)

reff

FMC

Cloud screening

9

10

Cloud screening (EUR: Mar 10, 2011)

11

Cloud screening (EUR: Mar 13, 2011)