Field Measurements with a Cloud Condensation Nucleus Spectrometer in Marine Fogs

• Main Authors: Fukuta, N., Saxena, V. K.
• Other Authors: DENVER RESEARCH INST CO CLOUD PHYSICS LAB
• Format: Text
• Language: English
• Published: 1975
• Subjects: Atmospheric Physics; Meteorology; *CONDENSATION NUCLEI; *FOG; *CLOUD PHYSICS; *SPECTROMETERS; CONCENTRATION(COMPOSITION); METEOROLOGICAL INSTRUMENTS; SUPERSATURATION; SPECTRUM ANALYSIS; MARINE METEOROLOGY; FIELD EQUIPMENT; TEMPERATURE INVERSION; HYDROMETEORS; VISIBILITY; REAL TIME; ATMOSPHERIC CONDENSATION; PARTICLE SIZE; AEROSOLS; Hayes; Newfoundland
• Online Access: http://www.dtic.mil/docs/citations/ADA030859; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA030859

During the last one-year reporting period, a field version of this laboratory's Cloud Condensation Nucleus (CCN) Spectrometer capable on continuously monitoring and displaying in real-time the activation spectrum of fog and cloud nuclei--was fabricated and field-tested. The tests proved it to be a dependable field instrument. In July, 1975, the CCN Spectrometer was installed aboard U. S. Naval Ship Hayes for measuring the characteristics of aerosols that participated in marine fog formation. The spectrum measurement were made during a three-week-long cruise aboard the ship off the coasts of Nova Scotia and Newfoundland. Some two thousand spectra were measured while approaching the fog, in the fog, and getting out of the fog. A variety of fog conditions were encountered in the field. Field measurements demonstrate that the fog nuclei spectrum in the supersaturation range 0.15-1.2% undergoes a marked change at the fog boundaries.