The Relevance of Manganese in the Ocean for the Climatic Cycles in the Quaternary

Vorgelegt in der Sitzung vom 18. November 1989

  • Augusto Mangini
  • Anton Eisenhauer
  • Peter Walter

Part of the Sitzungsberichte der Heidelberger Akademie der Wissenschaften book series (HD AKAD, volume 1990 / 4)

Table of contents

  1. Front Matter
    Pages 1-7
  2. Augusto Mangini, Anton Eisenhauer, Peter Walter
    Pages 9-18
  3. Augusto Mangini, Anton Eisenhauer, Peter Walter
    Pages 19-28
  4. Augusto Mangini, Anton Eisenhauer, Peter Walter
    Pages 28-30
  5. Back Matter
    Pages 30-31

About these proceedings

Introduction

It is widely accepted that there is a relationship between ice volume and the solar insolation in summer in the northern hemisphere. The Earth's glacial cycles are driven by cyclic changes in the Earth's orbital elements. This conclusion is based on the strong coherence between the approx. 20000 and 40000 year spectral components of ice volume and insolation (Milankovitch-curve) records. These frequencies are determined by the variation of the obliquity of the Earth's axis and by its position relative to the Earth's orbit around the sun. The degree of sum­ mer insolation on the Earth's northern Hemisphere is believed to be relevant to climate because the North Atlantic is where cold saline water is being formed. Present day deep water circulation is driven by salt build-up in due to net evapora­ tion. In contrast, in the North Pacific precipitation exceeds evaporation. Thus, deep water transfers a surplus of salt from the N. Atlantic to the North Pacific. This surface water delivers also oxygen to the deep ocean. In contrast, upwelling deep water transfers nutrients from the deep ocean to the surface water. Today the time of renewal of deep water is in the order of 1000 years.

Keywords

climate ocean quaternary sediment

Authors and affiliations

  • Augusto Mangini
    • 1
  • Anton Eisenhauer
    • 2
  • Peter Walter
    • 3
  1. 1.Heidelberger Akademie der WissenschaftenHeidelbergGermany
  2. 2.Institut für UmweltphysikUniversität HeidelbergHeidelbergGermany
  3. 3.Meeres- und Polarforschung, Bremerhaven z.Zt. Institut für UmweltphysikUniversität HeidelbergHeidelbergGermany

Bibliographic information

  • DOI https://doi.org/10.1007/978-3-642-46703-5
  • Copyright Information Springer-Verlag Berlin Heidelberg 1990
  • Publisher Name Springer, Berlin, Heidelberg
  • eBook Packages Springer Book Archive
  • Print ISBN 978-3-540-52364-2
  • Online ISBN 978-3-642-46703-5
  • Series Print ISSN 0371-0165
  • About this book