Sökning: "CORES"

Visar resultat 11 - 15 av 413 avhandlingar innehållade ordet CORES.

1. 11. Disentangling production and climate signals from high-resolution Beryllium records: implications for solar and geomagnetic reconstructions

   Författare :Minjie Zheng; MERGE: ModElling the Regional and Global Earth system; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Solar Activity; 10Be; 7Be; ice cores; tropopause; climate; cosmogenic radionuclides; geomagnetic reconstructions; multi-linear regression;

   Sammanfattning : The sun is the most important energy source for the Earth’s climate system, however, influences of solar variations on climate are not fully understood. Studying past solar activity can improve our understanding of what role the sun plays in Earth’s climate. LÄS MER

3. 12. Thermal Conductivity of Materials under Conditions of Planetary Interiors

   Författare :Zuzana Konôpková; Peter Lazor; Vitali Prakapenka; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; iron; high pressures-high temperatures; thermal conductivity; diamond anvil cell; laser-heating; planetary cores; Earth sciences; Geovetenskap;

   Sammanfattning : The presented thesis focuses on study of transport and thermoelastic properties of materials under conditions of planetary interiors by means of high-pressure experimental tools and finite element modeling, and their role in the dynamics and states of cores of terrestrial planets. Experiments in laser-heated diamond anvil cell (LHDAC) in combination with numerical simulations of heat transfer in DAC are shown to yield information on thermal conductivity of a pressurized sample. LÄS MER

4. 13. Solar Activity Changes at the End of the Last Ice Age - Influences on Climate and Applications for Dating

   Författare :Florian Adolphi; BECC: Biodiversity and Ecosystem services in a Changing Climate; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Solar Activity; 10Be; 14C; radiocarbon calibration; time scale; geochronology; paleoclimate; ice cores; tree rings; IntCal; cosmogenic radionuclides;

   Sammanfattning : Throughout its history Earth experienced a variety of natural climate changes. By investigating their spatial and temporal evolution we can increase the understanding of the mechanisms and dynamics underlying natural climate change and improve our general comprehension of the climate system. LÄS MER

5. 14. Astrochemical Investigations of Complex Organics in Cold Molecular Cloud Cores

   Författare :Tadeus Carl; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; astrobiology; astrochemistry; ISM – molecular clouds; ISM – molecules; dark clouds;

   Sammanfattning : Astrochemistry is the study of the formation and evolution of molecules in the interstellar medium (ISM) of the Milky Way and other galaxies. Molecules start to accumulate in the coldest and densest regions of the ISM, namely molecular clouds, and as of this date, 307 interstellar molecules are identified. LÄS MER

7. 15. Climate records from shallow firn cores, Dronning Maud Land, Antarctica

   Författare :Elisabeth Isaksson; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Antarktis;

   Sammanfattning : .... LÄS MER