Disclaimer: This material is being kept online for historical purposes. Though accurate at the time of publication, it is no longer being updated. The page may contain broken links or outdated information, and parts may not function in current web browsers. Visit https://espo.nasa.gov for information about our current projects.

 

Axial Cyclone Cloud-water Collector

The AC3 was designed at NASA Langley inspired by a previous Straub and Collett (2004) version. The probe samples in-situ cloud water by separating droplets from the main airflow.  This is accomplished by imparting swirl on an axial flow following an in-line stator, and collecting droplets that have impacted on the probes outer walls. Cloud-water is then transferred into the aircraft cabin using teflon tubing and manually collected into vials. Cloud-water can then be analyzed by a number of laboratory analytical techniques including ion-chromatography, pH electrodes, or total organic content. The probe utilizes a shutter to inhibit sample contamination by aerosols.    

Instrument Type: 
Aircraft: 
C-130 - WFF, P-3 Orion - WFF, HU-25 Falcon - LaRC
Point(s) of Contact: 

Langley Cloud Probes

The LARGE group operates a suite of probes to measure in-situ cloud microphysical properties. Probes are typically mounted at an under-wing or wing-tip position in unperturbed air. The package of probes can be tailored to specific science objectives or mounting-point availability considerations. The following probes are available:

CAPS (Cloud, Aerosol, Precipitation Spectrometer), Droplet Measurement Technologies.  The CAPS contains individual sensors.  The CAS (Cloud Aerosol Spectrometer) measures size distributions of clouds and aerosols between 0.5-50µm diameter using forward-scattered light intensity from a 658nm laser. Response is calibrated with glass beads. The CIP (Cloud Imaging Spectrometer) measures size distributions of droplet and precipitation particles between 15-150µm diameter recording shadows on an optical array. The CIP is calibrated using a spinning disk. A hotwire is also used to measure total liquid-water-content. Each probe utilizes a local measurment of airspeed, temperature, and static pressure for quantification and has de-icing capability.
CDP (Cloud Droplet Probe), Droplet Measurement Technologies. The CDP measures droplet and aerosol size distributions between 2-50µm diameter using forward-scattering from a 658nm laser.  The probe is calibrated with glass beads and has de-icing capability.
WCM-2000 (Science Engineering Associates).  Measures Liquid Water Content (LWC) using two independent hotwire elements, Total Water Content (TWC) using a scoop sensor, and an element oriented parallel with the airstream as a control to establish the background response at that specific airspeed, temperature, and pressure.  Ice Water Content (IWC) is calculated as the difference between TWC and LWC. Each element operates by maintaining a constant temperature, and the current necessary to maintain that temperature is related directly with water content.  
 

Instrument Type: 
Aircraft: 
DC-8 - AFRC, P-3 Orion - WFF, C-130 - WFF, HU-25 Falcon - LaRC
Point(s) of Contact: 

Langley Aerosol Mass Spectrometer

Aerodyne High-Resolution Time-of-Flight Aerosol Mass Spectrometer (AMS) operated by the Langley Aerosol Research Group Experiment (LARGE).  Provides fast-response non-refractory submicron aerosol mass concentrations (e.g., organics, sulfate, nitrate, ammonium, and chloride) and tracer m/z fragments (e.g., m/z44, m/z55, etc.).   

Instrument Type: 
Aircraft: 
DC-8 - AFRC, P-3 Orion - WFF, HU-25 Falcon - LaRC, C-130 - WFF
Point(s) of Contact: 

Observations of Aerosol‐Cloud Interactions During the North Atlantic Aerosol and Marine Ecosystem Study

Polarimetric retrievals of cloud droplet number concentrations T a,b,⁎ b,c b b,c

Sinclair, K., et al. (2019), Polarimetric retrievals of cloud droplet number concentrations T a,b,⁎ b,c b b,c, Remote Sensing of Environment, 228, 227-240, doi:10.1016/j.rse.2019.04.008.

4STAR_codes: 4STAR processing codes

Star, T., et al. (2018), 4STAR_codes: 4STAR processing codes, Zenodo, doi:10.5281/zenodo.1492912.

Retrievals of cloud droplet size from the research scanning polarimeter data: T Validation using in situ measurements

Alexandrov, M. D., et al. (2018), Retrievals of cloud droplet size from the research scanning polarimeter data: T Validation using in situ measurements, Remote Sensing of Environment, 210, 76-95, doi:10.1016/j.rse.2018.03.005.

NAAMES Returns to Air and Sea to Study Plankton’s Annual Cycle

NASA’s North Atlantic Aerosols and Marine Ecosystems Study (NAAMES) returned to air and sea to research the declining, or deaccelerating, phase of the annual cycle of plankton in the North Atlantic. Since plankton form the base of the marine food web and impact the productivity of fisheries, understanding this declining phase is important to forecasting the future.

All in the NAAMES of Ocean Ecosystems and Climate

NAAMES, or the North Atlantic Aerosols and Marine Ecosystems Study, is a five-year NASA-funded study that aims to better define the relationship between the ocean and the atmosphere. NAAMES is the first NASA Earth Venture-Suborbital mission focused on study

Pages

Subscribe to RSS - NAAMES