Sökning: "tropopause"

Visar resultat 1 - 5 av 10 avhandlingar innehållade ordet tropopause.

1. 1. 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. 2. Chemical and Morphological Characterisation of Aerosol Particles in the Tropopause Region

   Författare :Hung Nguyen Ngoc; Kärnfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; CARIBIC; Physics; Singel particle analysis TEM and EFTEM; Carbon and Sulphur; Light element analysis; Aerosol sampler; Chemical Characterisation; Aerosol in the Tropopause Region; Nuclear physics; Technological sciences; Fysik; Teknik; Kärnfysik; Fysicumarkivet A:000;

   Sammanfattning : The aim of this work was to study atmospheric aerosols, focusing on the chemical composition, the morphology and the origin of the aerosol in the upper troposphere and lowermost stratosphere. An aerosol sampler was developed for this purpose. A new method for quantitative analysis of the major components of the aerosol, i.e. LÄS MER

4. 3. METHODOLOGY OF SAMPLING AND ANALYSIS FOR TROPOPAUSE REGION AEROSOL STUDIES

   Författare :Hung Nguyen Ngoc; Kärnfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Fysicumarkivet A:000;

   Sammanfattning : [abstract missing].... LÄS MER

5. 4. Mesoscale processes in the polar atmosphere : radar remote sensing, balloon-borne in situ measurements and modelling

   Författare :Maria Mihalikova; Suzanne Gray; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Rymdteknik; Space Technology;

   Sammanfattning : Mesoscale processes (atmospheric phenomena with horizontal scales ranging from a few tens to several hundred kilometres and lasting from a few tens of minutes to a few days) have the potential to influence the chemical composition of the troposphere. Tropopause folds and mountain waves are two important types of mesoscale processes. LÄS MER

7. 5. Seasonality and variability of stratospheric water vapour

   Författare :Tongmei Wang; Abdel Hannachi; Qiong Zhang; Alexey Karpechko; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; stratospheric water vapour; seasonality; variability; atmosfärvetenskap och oceanografi; Atmospheric Sciences and Oceanography;

   Sammanfattning : Stratospheric water vapour (SWV) plays a critical role in the climate system by modulating the radiation budget and influencing the stratospheric chemistry. Studying changes of SWV on global scale is helpful for our understanding of climate change. LÄS MER