Atmospheric Radiation Measurement Climate Research Facility US Department of Energy
 
 

Tropospheric Ozone Variability during LASIC

24 July 2017 - 5 October 2017

Lead Scientist: Gregory Jenkins

Observatory: AMF, ASI

A unique opportunity exists to examine high frequency vertical profiles of tropospheric ozone and its relationship to biomass burning aerosols and the African Easterly Jet- South during August/September 2017 during the wave-one ozone maximum over the South Tropical Atlantic (STA) when high quality ground based aerosol measurements are available during the LASIC field campaign at Ascension Island. The LASIC field campaign using the AMF1 during its intensives have launched 4-8 radiosondes per day Ascension Island. In addition the Micropulse lidar (MPL) provides vertical profiles of biomass burning aerosol layers that are transported from Africa. Since April 2016, the NASA SHADOZ site has begun taking vertical profiles of ozone at Ascension Island. However, these profiles of ozone occur only once per week. Daily AERONET data and reanalysis of the 700 hPa winds show that the limited ozonesondes are not capturing the variability of either aerosols or 700 hPa winds associated with the AEJ-S. Consequently, because aerosols and ozone plumes have their source of Southern Africa and are transported westward by the AEJ-S the ozone sampling that is currently taking place is most likely not capturing ozone variability.

There are three objectives that we wish to achieve in the proposed work:

1.Collect high frequency vertical profiles (3 additional) with a focus on tropospheric ozone to compliment the weekly SHADOZ ozone profiles at Ascension Island. Some of the ozonesonde launches should occur under limited cloudy conditions. 2.Document episodes of biomass burning aerosol events (using lidar) and its relationship to vertical profiles of ozone mixing ratios through high frequency ozonesonde launches. 3.Determine how vertical profiles of ozone mixing ratios vary in the active/inactive phases of the AEJ-S which is identified with high frequency LASIC radiosonde measurements and how it leads to variations in the lower to middle tropospheric ozone mixing ratios and aerosol loading at Ascension Island.

Campaign Data Sets

IOP Participant Data Source Name Final Data
Gregory Jenkins Ozone Sondes Order Data

ASI Data Sources

Name Full Name Browse Data
ACSM Aerosol Chemical Speciation Monitor Browse Data
AERI Atmospheric Emitted Radiance Interferometer Browse Data
AETH Aethalometer Browse Data
AOD Aerosol Optical Depth, derived from atmospheric extinction of solar irradiance Browse Data
AOP Aerosol Optical Properties Browse Data
AOS Aerosol Observing System Browse Data
AOSMET Meteorological Measurements associated with the Aerosol Observing System Browse Data
CCN Cloud Condensation Nuclei Particle Counter Browse Data
CEIL Ceilometer Browse Data
CO-ANALYZER Carbon Monoxide Analyzer Browse Data
CPC Condensation Particle Counter Browse Data
CSPHOT Cimel Sunphotometer Browse Data
DL Doppler Lidar Browse Data
DLPROF Doppler Lidar Profiles Browse Data
ECMWFDIAG European Centre for Medium Range Weather Forecasts Diagnostic Analyses Browse Data
ECOR Eddy Correlation Flux Measurement System Browse Data
GNDRAD Ground Radiometers on Stand for Upwelling Radiation Browse Data
HTDMA Humidified Tandem Differential Mobility Analyzer Browse Data
INTERPSONDE Interpolated Sonde Browse Data
IRT Infrared Thermometer Browse Data
KASACR Ka-Band Scanning ARM Cloud Radar Browse Data
KAZR Ka ARM Zenith Radar Browse Data
KAZRARSCL Active Remote Sensing of CLouds (ARSCL) product using Ka-band ARM Zenith Radars Browse Data
KAZRCOR KAZR Corrected Data Browse Data
LDIS Laser Disdrometer Browse Data
MET Surface Meteorological Instrumentation Browse Data
MFR Multifilter Radiometer Browse Data
MFRSR Multifilter Rotating Shadowband Radiometer Browse Data
MPL Micropulse Lidar Browse Data
MPLCMASK Cloud mask from Micropulse Lidar Browse Data
MWR Microwave Radiometer Browse Data
MWR3C Microwave Radiometer, 3 Channel Browse Data
MWRHF Microwave Radiometer - High Frequency Browse Data
MWRP Microwave Radiometer Profiler Browse Data
MWRRET MWR Retrievals Browse Data
NEPHELOMETER Nephelometer Browse Data
NFOV Narrow Field of View Zenith Radiometer Browse Data
NOX Nitrogen Oxides Monitor Browse Data
OZONE Ozone Monitor Browse Data
PBLHT Planetary Boundary Layer Height Browse Data
PSAP Particle Soot Absorption Photometer Browse Data
RAIN Rain Gauge Browse Data
RWP Radar Wind Profiler Browse Data
SASHE Shortwave Array Spectroradiometer-Hemispheric Browse Data
SASZE Shortwave Array Spectroradiometer-Zenith Browse Data
SEBS Surface Energy Balance System Browse Data
SKYRAD Sky Radiometers on Stand for Downwelling Radiation Browse Data
SMPS Scanning mobility particle sizer Browse Data
SO2 Sulfur Dioxide Monitor Browse Data
SODAR Mini Sound Detection and Ranging Browse Data
SONDE Balloon-Borne Sounding System Browse Data
SONDEGRID Gridded Sonde VAP Product Browse Data
SP2 Single Particle Soot Photometer 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
WACR W-Band (95 GHz) ARM Cloud Radar Browse Data
WB Weighing Bucket Precipitation Gauge Browse Data
WSACR W-band Scanning ARM Cloud Radar Browse Data