IMPLICATIONS OF VOLCANISM AND GEOMAGNETIC FIELD POLARITY REVERSALS INTO THE CLIMATE VARIABILITY

• Main Authors: N. D. Kuznetsova, V. V. Kuznetsov
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Antarc*; Antarctica; ice core
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.564.4182; http://geo.phys.spbu.ru/materials_of_a_conference_2008/M/Kuznetsova_Kuznetsov.pdf

Abstract. Increase of volcanism just as geomagnetic field reversals and excursions implications into long temporal paleoclimate variability are discussed. Stratosphere volcanic fine-grained submicron dust is considered to be a long-living barrier to the Sun radiation input to the Earth surface that is borne out by the high correlation between the Earth surface temperature and the dust content in the ice cores of Antarctica during the last 400,000 years. The ice core dust provenance, its varying content in ice-core layers and properties at different climatic periods wide debated give us occasion to develop our concept about effect of the volcanism increase on the large temporal climate variability. The link between climate changes and the geomagnetic field reversals and excursions has no unambiguous interpretation since both climate cooling and warming are known to run during reversals and excursions. Considering reversals and excursions to be processes being accompanied by penetration of the cosmic rays particles which are governing the atmosphere transparency we are substantiating a consequence of the reversals and excursions impact on climate to be determined by a presence or absence of dust in the stratosphere. Here we attempt to account increase of volcanism for the geomagnetic field excursions.