sun- (/sky-) photometer ground-networks. GAW - aod. AERONET. … complementing LIDAR. Stefan Kinne MPI-Met, Hamburg. SKYnet. MAN - aod. can do aerosol column properties AOD at several wavel. fine mode AOD fraction water vapor size distribution (sky) absorption AOD (sky)
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GAW - aod
… complementing LIDAR
MAN - aod
aerosol column properties
AOD at several wavel.
fine mode AOD fraction
size distribution (sky)
absorption AOD (sky)
cloud opt.depth (sky)
consistency through calibr. networks operation
night time (need the sun)
when clouds are present
calibration and reference for lidar remote sensing
reference in evaluations of aerosol global modeling
complementary nature to lidar (at MPL-NET and most EARLINET sites)
AOD = integrated ext.
local nature of sample
day-time nature of sample
abso. less acc at low AODsun- (/sky-) photometers
successful recent data access
9/20/2010 data !
are offered !
here for Hedo
data on the web !
no data access on the nice Swiss web-site
error message on the NILU/EBAS site
sky-radiance data of additional info on
absorption if AOD is large (suff. signal / noise ratio)
AOD based on reflected radiances … function of
size matters (pre-selected)
shape matters (spheres)
absorption mat. (assumed)
surface properties need to be known:
D 1% alb ~ D 0.1 AODsun-photo vs. sat-retrieval
annual maps of an aerosol climatology
AOD diff. to AERONET
score - 0.56 BIAS-sign
(error = 0.44) positivenegative temp correlation
strength spatial correlat.
even though lidar and sun-/sky-photometer have different viewing geometries …