NOAA R/V Ron Brown STXM-NEXAFS X-Ray Microscopy Data

Authors: 
PI Lynn M Russell
9500 Gilman Drive MC0221
La Jolla, CA 92093
lmrussell@ucsd.edu
aerosols.ucsd.edu

Alternate contact:
Lelia Hawkins
301 Platt Blvd
Claremont, CA 91711
lelia_hawkins@hmc.edu

1.0 Data Set Overview
Particles were collected over 30 min to 1 hr periods during Leg 2 
of the RHB cruise onto silicon nitride windows. Samples were 
stored frozen and analyzed between Jan 2009 and Jan 2010 
at the Advanced Light Source at the Lawrence Berkeley National Lab. 
Details can be found in Hawkins et al., 2010, JGR and Hawkins 
and Russell, 2010, Adv Met. Individual particles were measured 
for organic functional groups at nm resolution. Particle size and 
shape were also recorded. 

Samples were collected from 11/8/2008 to 11/30/2008. 
See Streaker Notes.txt for window sample times. 
Not all windows were analyzed to due constrained access 
to the LBL advanced light source. If you are interested 
in a specific time, contact Lynn M. Russell for the 
possibility for future analysis. 

Location can be determined from RHB lat/lon information 
and sample time based on user needs.

2.0 Instrument description
For Russell group STXM-NEXAFS analysis see Russell et al., 2002, 
Takahama et al., 2007;2009, Hawkins and Russell, 2010 Adv. Met.

3.0 Data Collection and Processing
Particle averaged spectra and organic functional groups 
are available upon request. These give detailed characteristics 
of individual particles but do not provide any statistically 
significant measurements for the VOCALS campaign. 

4.0 Data format
Two files are provided, one with window collection time and notes, 
one with particle sizes, ID, and window for each particle analyzed. 
Tab delimited ASCII is used.

5.0 Remarks
The measurements are not regularly spaced, rather measurements 
are based on AMS organic levels and interesting changes in particle 
size/number observed on board. Only Leg 2 samples are available. 

6.0 References
Russell, LM, SF Maria, and SCB Myneni, Mapping organic coatings 
on atmospheric particles, 2002, GRL, 29(16) doi:10.1029/2002GL014874.

Takahama, S, S Gilardoni, LM Russell, and AD Kilcoyne, 
Classification of multiple types of organic carbon composition 
in atmospheric particles by scanning transmission X-ray microscopy 
analysis, 2007, Atmos. Env. 41, 9435-9451.

Takahama, S, S Liu, and LM Russell, Coatings and clusters of 
carboxylic acids in carbon-containing atmospheric particles 
from spectromicroscopy and their implications for cloud-nucleating 
and optical properties, 2009, JGR, 115(D01202), doi:10.1029/2009JD012622.

Hawkins, LN and LM Russell, Polysaccharides, Proteins, and 
Phytoplankton Fragments: Four Chemically Distinct Types of 
Marine Primary Organic Aerosol Classified by Single Particle 
Spectromicroscopy, 2010, Adv Met, 612132, doi:10.1155/2010/612132.

Hawkins, L. N., L. M. Russell, D. S. Covert, P. K. Quinn, and T. S. Bates, 
Carboxylic acids, sulfates, and organosulfates in processed continental 
organic aerosol over the southeast Pacific ocean during VOCALS-REx 
2008, 2010, JGR, 115, D13201, doi:10.1029/2009JD013276.