lec15 - ATM 6, Class #15 Acid Rain Part II: SO2 and NOx...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 1 ATM 6, Class #15 Cort Anastasio Atmospheric Science Program University of California - Davis Acid Rain Part II: SO 2 and NO x 2 Atmospheric Sulfur (S) Compounds “Reduced” S Compounds SO 2 Sulfur Dioxide H 2 S Hydrogen Sulfide (CH 3 ) 2 S Dimethyl sulfide (DMS) …Are Oxidized to Sulfuric Acid. .. H 2 SO 4 2 H + + SO 4 2– …A Source of Protons Emissions Atmospheric Dispersion and Transformations Deposition & Effects
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 3 Mechanisms for S Oxidation (and H 2 SO 4 Formation) • What is a cloud or fog? – A suspension of liquid water drops (containing various levels of chemicals) in air. – These drops form on aerosol particles called CCN (cloud condensation nuclei) – Water drop size: ~ 20 μ m diameter – Number of drops: ~ 100 drops/cm 3 of air – Liquid water content: ~ 1 cm 3 of water/1,000,000 cm 3 of air • i.e., 1 g of water/ m 3 of air • In the gas phase – Reaction of OH with SO 2 produces H 2 SO 4 • In cloud or fog drops – ______________________________ react with dissolved SO 2 to form H 2 SO 4 – These aqueous reactions are much faster than gas phase reaction 4 Acid Formation in Clouds and Fogs (II) Formation of Fogs in Davis (Radiation Fogs) Result is a suspension of water drops in air – a fog! Nighttime, High RH, Clear, Calm
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/22/2008 for the course ATM 006 taught by Professor Anastasio during the Fall '07 term at UC Davis.

Page1 / 8

lec15 - ATM 6, Class #15 Acid Rain Part II: SO2 and NOx...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online