© 1993

The Tropospheric Chemistry of Ozone in the Polar Regions

  • H. Niki
  • K. H. Becker
Conference proceedings

Part of the NATO ASI Series book series (volume 7)

Table of contents

  1. Front Matter
    Pages I-VII
  2. Introduction

    1. H. Niki, K. H. Becker
      Pages 1-2
  3. Overview

  4. Tropospheric Oxidants Modelling

    1. Hiram Levy II, Walter J. Moxim, Prasad S. Kasibhatla
      Pages 77-88
    2. John C. McConnell, Grant S. Henderson
      Pages 89-103
  5. Field Studies

  6. Marine Sources and Sinks

    1. Robert Moore, Ryszard Tokarczyk, Charles Geen
      Pages 235-250
    2. B. Bonsang
      Pages 251-260
    3. T. P. Kindler, W. L. Chameides, P. H. Wine, D. Cunnold, F. Alyea
      Pages 261-272
  7. Laboratory Studies of Heterogeneous Reactions

About these proceedings


The Arctic troposphere (0 to ca. 8 km) plays an important role in environmental concerns for global change. It is a unique chemical reactor influenced by human activity and the Arctic ocean. It is surrounded by industrialized continents that in winter contribute gaseous and particulate pollution (Arctic haze). It is underlain by the flat Arctic ocean from which it is separated by a crack-ridden ice membrane 3 to 4 m thick. Ocean to atmosphere exchange of heat, water vapor and marine biogenic gases influence the composition of the reactor. From September 21 to December 21 to March 21, the region north of the Arctic circle goes from a completely sunlit situation to a completely dark one and then back to light. At the same time the lower troposphere is stably stratified. This hinders vertical mixing. During this light period, surface temperature reaches as low as -40°C. In this environment, chemical reactions involving sunlight are generally much slower than further south. Thus, the abundance of photochemically reactive compounds in the atmosphere can be high prior to polar sunrise. Between complete dark in February and complete light in April, a number of chemical changes in the lower troposphere take place.


Oxidantien Ozon Troposphere Troposphäre environment ozone depletion polar sunrise troposheric chemistry

Editors and affiliations

  • H. Niki
    • 1
  • K. H. Becker
    • 2
  1. 1.Center for Atmospheric Chemistry and Chemistry DepartmentYork UniversityNorth YorkCanada
  2. 2.Physikalische Chemie — FB9Bergische UniversitätWuppertalGermany

Bibliographic information