ARM processors
; Atmospheric movements
; Atmospheric thermodynamics
; Chemical analysis
; Coastal zones
; Higher order statistics
; Ozone
; Potential energy
; Storms
; Velocity
; Wind
; Air chemistry
; Amazon region
; Convective available potential energies
; Ground-level ozone
; Low level jet
; Maximum wind speed
; Meteorological observation
; Turbulence intensity
; Fighter aircraft
; ozone
; aircraft
; atmospheric chemistry
; atmospheric convection
; mesoscale eddy
; ozone
; potential energy
; storm
; thermodynamics
; wind shear
; wind velocity
; altitude
; Article
; atmospheric pressure
; boundary layer
; Brazil
; cold air
; precipitation
; priority journal
; thermodynamics
; velocity
; weather
; wind
; Amazonia
; Brazil
Scopus学科分类:
Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要:
In this work, we investigate the ozone dynamics during the occurrence of both downdrafts associated with mesoscale convective storms and non-classical low-level jets. Extensive data sets, comprised of air chemistry and meteorological observations made in the Amazon region of Brazil over the course of 2014–15, are analyzed to address several questions. A first objective is to investigate the atmospheric thermodynamic and dynamic conditions associated with storm-generated ozone enhancements in the Amazon region. A second objective is to determine the magnitude and the frequency of ground-level ozone enhancements related to low-level jets. Ozone enhancements are analyzed as a function of wind shear, low-level jet maximum wind speed, and altitude of jet core. Strong and sudden increases in ozone levels are associated with simultaneous changes in variables such as horizontal wind speed, convective available potential energy, turbulence intensity and vertical velocity skewness. Rapid increases in vertical velocity skewness give support to the hypothesis that the ozone enhancements are directly related to downdrafts. Low-level jets associated with advancing density currents are often present during and after storm downdrafts that transport ozone-enriched air from aloft to the surface. � 2017 Elsevier Ltd
Departament of Physics, Federal Institute of Education, Science and Technology of Par�, IFPA, Bragan�a, PA, Brazil; Departament of Environmental Engineering, Federal University of Paran�, UFPR, Caixa Postal 19100, Curitiba, PR, Brazil; Department of Meteorology and Atmospheric Science, The Pennsylvania State University, University Park, PA, United States; Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States
Recommended Citation:
Dias-Junior C,Q,, Dias N,et al. Convective storms and non-classical low-level jets during high ozone level episodes in the Amazon region: An ARM/GOAMAZON case study[J]. Atmospheric Environment,2017-01-01,155