Title: Discoverer Impactor Data (Leg 1) for Gravimetric Analysis

Contact:

   Patricia Quinn
   OCRD
   NOAA/Pacific Marine Environmental Laboratory
   7600 Sand Point Way NE
   Seattle, WA, USA, 98115
   Telephone: (206) 526-6892
   Facsimile: (206) 526-6744
   E-Mail Address: quinn@pmel.noaa.gov


Data Set Description:

ACE-1, Leg 1:   PMEL 2-stage impactor samples collected onboard the
Discoverer for gravimetric analysis.

These data should not be used without first
contacting Trish Quinn (quinn@pmel.noaa.gov).

The gravimetrically-determined mass concentrations are given in ug/m3.
Submicron values represent the mass concentration in all particles
with aerodynamic diameters < 1.0 um.  Supermicron values are
for particles with aerodynamic diameters > 1um and < 10 um.  Diameters
are given for the relative humidity of the sampled air stream.

Uncertainties associated with the mass concentrations range
from +/- 5 to 25%.

Codes used in the file:

"NA, not available"


Format: comma-delimited ASCII with fields:

1, Start Date (YYYY/MM/DD) (UTC)
2, Start Time (HH:MM:SS) (UTC)
3, Stop Date (YYYY/MM/DD) (UTC)
4, Stop Time (HH:MM:SS) (UTC)
5, Sample number
6, Start time, UTC - Julian Decimal Date
7, Stop time, UTC - Julian Decimal Date
8, Start Latitude
9, Stop Latitude
10, Start Longitude
11, Stop Longitude
12, average % RH of the sampled air stream.
13, standard deviation of the RH of the sampled air stream.
14, % RH of the substrate during the pre-sampling weighing.
15, % RH of the substrate during the post-sampling weighing.
16, volume of sample (m3 of air)
17, sub_mass, submicron mass concentration in ug/m3
18, sup_mass, supermicron mass concentration in ug/m3


File Name Conventions:
   l1_2_grv.dat


References: None.