Stratospheric Ozone Depletion Mechanisms in the United States: Convective Penetration and Catalytic Loss During Summer
Overview
This paper investigates the dynamical and photochemical mechanisms controlling ozone depletion in the lower stratosphere over the United States, with particular focus on convective penetration and catalytic loss cycles. The study uses Next-Generation Radar observations and the AER 2D Model to demonstrate how convective activities, temperature variations, gravity waves, and inorganic chlorine distribution contribute to summer ozone loss through heterogeneous catalytic conversion.
What this research paper covers
- Introduction and research objectives: frequency and depth of ozone penetration into stratosphere using radar observations
- Discussion: analysis of latent heat, convective activities, differential temperatures, and gravity wave influences on catalytic loss rates
- Conclusion: evidence of photochemical reactions demonstrating ozone loss caused by chlorine and bromine radical catalysis during summer
Preview
Abstract
Recent observation has birthed a new interest in the dynamical and photochemical mechanisms controlling the ozone in the lower stratosphere in the United States. The aim of the study is to show the frequency and depth of ozone penetration into the stratosphere. The Next-Generation Radar will be used within the stratosphere of condensed phase water. We will also determine the distribution of inorganic chlorine that is established in the same coordinate system as the radar observations. Finally, the study aims to establish the high-resolution temperature structure within the stratosphere in the United States during summer that resolves the spatial and structural variability. This include how gravity waves influence the variation. Further, we present observations that describe the final amplification of the catalytic loss rate of ozone for the dominant halogen, hydrogen, and nitrogen catalytic cycles. This include the observations of convective penetration heights, elevated water vapor, and temperature as inputs to the Atmospheric and Environmental Research (AER) 2D Model. Through observations, we have noted that there is a risk of a rapid heterogenous catalytic conversion of inorganic chlorine, which is abundant in the aerosols. This relates with the loss of ozone in the stratosphere during summer.
Discussion
Latent heat and resulting convective activities are the main cause of the observations experienced in the stratosphere and the subsequent loss of ozone. The differential temperatures influence the response of rate-limiting seps for the catalytic loss of stratospheric ozone to temperature in both the presence and absence of the convectively injected water vapor.