Atmospheric Radiation Measurement Climate Research Facility US Department of Energy

Marine ARM GPCI Investigation of Clouds (MAGIC): Marine Ice Nuclei Collections

1 June 2013 - 30 September 2013

Lead Scientist: Paul DeMott

Observatory: AMF, MAG

This campaign augmented existing measurements obtained through the AMF deployment for the MAGIC field campaign with shipboard aerosol collections for offline processing to measure ice nuclei concentrations and their association with aerosol properties. A new data set was obtained for use toward parameterizing oceanic (e.g., sea spray) ice nuclei emissions in modeling of aerosol connections to cloud phase and properties on regional and global scales. Filter-based aerosol collections (24-hour samples) were made on at least four round-trip cruises from Los Angeles to Honolulu and archived frozen until post-analyses are completed. Offline analyses are expected to include measurements of the immersion freezing ice nuclei temperature spectra of particles washed from the filters, measurement of the concentrations of known ice-nucleating bacteria, processing to determine the inorganic/organic proportions of ice nuclei, and pyrosequencing analysis for association of ice nuclei with the overall biological community diversity. Correlations were examined with other aerosol parameters and meteorological data (e.g., wind speed) measured by the AMF, as well as with satellite ocean color products. We hypothesize that the release of ice nuclei from sea spray is a modest emission mechanism to the atmosphere, though greatly enhanced in water regions with strong marine biological activity and a control in any case on ice nuclei reaching mixed‐phase cloud levels directly over or after transport over expansive ocean areas. The MAGIC ice nuclei collections represent a critical in situ data set for characterizing ice nuclei concentrations over warmer and relatively lower productivity ocean regions for comparison to future data from other regions.

Related Publications


Painemal D, J Chiu, P Minnis, C Yost, X Zhou, M Cadeddu, E Eloranta, E Lewis, R Ferrare, and P Kollias. 2017. "Aerosol and cloud microphysics covariability in the northeast Pacific boundary layer estimated with ship-based and satellite remote sensing observations." Journal of Geophysical Research: Atmospheres, 122(4), 10.1002/2016JD025771.
Research Highlight


DeMott PJ, TC Hill, CS McCluskey, KA Prather, DB Collins, RC Sullivan, MJ Ruppel, RH Mason, VE Irish, T Lee, CY Hwang, TS Rhee, JR Snider, GR McMeeking, S Dhaniyala, ER Lewis, JJ Wentzell, J Abbatt, C Lee, CM Sultana, AP Ault, JL Axson, MD Martinez, I Venero, G Santos-Figueroa, MD Stokes, GB Deane, OL Mayol-Bracero, VH Grassian, TH Bertram, AK Bertram, BF Moffett, and GD Franc. 2016. "Sea spray aerosol as a unique source of ice nucleating particles." Proceedings of the National Academy of Sciences, 113(21), 10.1073/pnas.1514034112.

DeMott PJ and TC Hill. 2016. Marine Ice Nuclei Collections – MAGIC (MAGIC-IN) Final Campaign Summary. Ed. by Robert Stafford, DOE ARM Climate Research Facility. DOE/SC-ARM-15-030.


Lebsock MD, K Suzuki, LF Millan, and PM Kalmus. 2015. "The feasibility of water vapor sounding of the cloudy boundary layer using a differential absorption radar technique." Atmospheric Measurement Techniques, 8(9), 10.5194/amt-8-3631-2015.

Zheng Y and D Rosenfeld. 2015. "Linear relation between convective cloud base height and updrafts and application to satellite retrievals." Geophysical Research Letters, 42(15), 10.1002/2015gl064809.

Mather J. 2015. 2014 Annual Report. Ed. by Robert Stafford, DOE ARM Climate Research Facility. DOE/SC-ARM-14-033.

Zhou X, P Kollias, and ER Lewis. 2015. "Clouds, Precipitation, and Marine Boundary Layer Structure during the MAGIC Field Campaign." Journal of Climate, 28(6), 10.1175/jcli-d-14-00320.1.


Mather J. 2014. 2013 Annual Report. Ed. by Sarah Shoemaker, DOE ARM Climate Research Facility. DOE/SC-ARM-13-023.

View All Related Publications

Campaign Data Sets

IOP Participant Data Source Name Final Data
Paul DeMott Ice Spectrometer Order Data

MAG Data Sources

Name Full Name Browse Data
AOS Aerosol Observing System Browse Data
AOSMET Meteorological Measurements associated with the Aerosol Observing System Browse Data
ASSIST Atmospheric Sounder Spectrometer for Infrared Spectral Technology Browse Data
CCN Cloud Condensation Nuclei Particle Counter Browse Data
CEIL Ceilometer Browse Data
CPC Condensation Particle Counter Browse Data
HSRL High Spectral Resolution Lidar Browse Data
HTDMA Humidified Tandem Differential Mobility Analyzer Browse Data
IRT Infrared Thermometer Browse Data
KAZR Ka ARM Zenith Radar Browse Data
LDIS Laser Disdrometer Browse Data
MET Surface Meteorological Instrumentation Browse Data
MPL Micropulse Lidar Browse Data
MPLCMASK Cloud mask from Micropulse Lidar Browse Data
MWACR Marine W-Band (95 GHz) ARM Cloud Radar Browse Data
MWR Microwave Radiometer Browse Data
MWR3C Microwave Radiometer, 3 Channel Browse Data
NAV Navigational Location and Attitude Browse Data
NEPHELOMETER Nephelometer Browse Data
OZONE Ozone Monitor Browse Data
PBLHT Planetary Boundary Layer Height Browse Data
PRP Portable Radiation Package Browse Data
PSAP Particle Soot Absorption Photometer Browse Data
RWP Radar Wind Profiler Browse Data
SASZE Shortwave Array Spectroradiometer-Zenith Browse Data
SONDE Balloon-Borne Sounding System Browse Data
S-TABLE Stabilized Platform Browse Data
TSI Total Sky Imager Browse Data
UHSAS Ultra-High Sensitivity Aerosol Spectrometer Browse Data
VISST Minnis Cloud Products Using Visst Algorithm Browse Data