Description: Das Projekt "Nord-Sued-Klimaverbindung und Kohlenstoffkreislauf waehrend der vergangenen 250000 Jahre" wird vom Umweltbundesamt gefördert und von Universität Bern, Physikalisches Institut, Abteilung für Klima- und Umweltphysik durchgeführt. Leading Questions: Is a period of stable and mild climate lasting 10000 years an exception? Are the rapid and drastic climatic changes observed in Greenland ice cores global events? How are global climatic changes coupled between the two hemispheres? Abstract: The aim of this proposal is to understand the dynamics of the climate system over the last 250,000 years, using an interactive approach between paleodata acquisition and modelling. A special emphasis is given lo the climatic interaction between the northern and southern hemispheres and the role of the carbon cycle. This includes - The reconstruction from existing bipolar (Antarctica and Greenland) ice cores of temperature changes as well as of different important climatic factors influencing the Earth's radiative balance greenhouse gases, ice volume, aerosols, - Modelling the isotopic composition of the precipitation and the dust cycle using AGCM, - Modelling climate and carbon cycle dynamics using a hierarchy of models to investigate the different mechanisms of the interhemispheric transmission of climate signals. The collaborative effort will allow - to describe with high resolution bipolar changes of climatic parameters observed from ice cores with a specific focus on interstadial and glacial-interglacial transitions, - to provide new information on greenhouse trace gas-climate interactions during the past, - to provide estimate of global climate sensitivity over the last 250 kyr, - to understand the mechanisms of the interhemispheric dynamics of the climate system, - to describe the temporal sequence of the processes generating the climate variability over climatic cycles, - to understand how and why the carbon cycle has undergone the variations observed on the paleoCO2 record. Benefits of this work will include a better understanding of the processes governing climatic and environmental changes and of climate sensitivity It will also provide data over a large range of climatic conditions, helping the validation of the climate models used for predicting future climate.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Tierhaltungsanlage ? Grönland ? Paläoklimatologie ? Spurengas ? Strahlungshaushalt ? Gewächshaus ? Gelöster organischer Kohlenstoff ? Klimavariabilität ? Aerosol ? Staubniederschlag ? Aufbereitungstechnik ? Verfahrensparameter ? Eis ? Antarktis ? Klimamodell ? Kohlenstoffkreislauf ? Bohrkern ? Polargebiet ? Modellierung ? Erdgeschichte ? Globales Klima ? Klimafaktor ? Niederschlag ? Umweltveränderung ? Globale Aspekte ? Treibhausgas ? Klimawandel ? Transmission ? Klimasensitivität ? Klimasystem ? Noerdliche-Hemisphaere ? Suedliche-Hemisphaere ? Isotopenverhältnis ?
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1996-01-01 - 1998-12-31
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