Geoscience Reference
In-Depth Information
Table 6.1
Aerosol Data (aer) instrument details. (ftp://ftp.daac.ornl.gov/data/safari2k/atmo-
spheric/CV-580/com
p/CV-580.pdf)
Instrument I
Name
pcaspdnc
Definition
Particle concentration between 0.1 and 3.0 μm in 15 channels (corrected per
micron)
Units
#/cc
Instrument
Particle measuring systems model PCASP-100X
Processing
Calculated from raw counts and sample time
Notes
Channel limits are: 0.10, 0.12, 0.14, 0.17, 0.20, 0.25, 0.30, 0.40, 0.50, 0.70,
0.90, 1.20, 1.50, 2.00, 2.50, 3.00 μm
Instrument II
Name
tsidnc
Definition
Particle concentration between 0.5 and 20 μm in 52 channels (corrected per
micron)
Units
#/cc
Instrument
TSI Model 3320 APS
Processing
Calculated from raw counts and sample time
Notes
There are no data from this instrument on UW flights 1815, 1818, 1820, and
1830. Channel limits are: 0.487, 0.523, 0.562, 0.604, 0.649, 0.698, 0.750,
0.806, 0.866, 0.931, 1.000, 1.075, 1.155, 1.241, 1.334, 1.433, 1.540, 1.655,
1.778, 1.911, 2.054, 2.207, 2.371, 2.548, 2.738, 2.943, 3.162, 3.398, 3.652,
3.924, 4.217, 4.532, 4.870, 5.233, 5.623, 6.043, 6.494, 6.978, 7.499, 8.058,
8.660, 9.306, 10.000, 10.746, 11.548, 12.409, 13.335, 14.330, 15.399,
16.548, 17.783, 19.110, 20.535 μm
6.2.2
Data Set II
Aerosol size distributions for three land stations (Ny Ålesund, Pallas, and Hohen-
peissenberg) were obtained from World Data Centre for Aerosols (http://wdca.
jrc.it/data/parameters/data_size.html) at The aerosol size distribution data archive
and details of these data sets are given in Table
6.3
. (Archive:
ftp://ftp-ccu.jrc.it/
means and corresponding standard deviations of aerosol number concentrations for
the aerosol size class intervals were used for the study.
6.3
Analysis
The aerosol size spectrum is given as (Sect. 1.6.4) the normalized aerosol number
concentration equal to
1
N
d
N
lnr
an
versus the normalized aerosol radius
r
an,
, where
d(
)
r
r
a
(i)
r
an
is equal to
,
r
a
being the mean class interval radius and
r
as
the mean
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