Essays about: "ice cores"

Showing result 6 - 10 of 27 essays containing the words ice cores.

1. 6. Aerosol Input and Snow Accumulation Rates on the Northern Greenland Ice Sheet : Reconstructed by means of Continuous Flow Analysis (CFA) of 6 shallow firn cores

   University essay from Uppsala universitet/Institutionen för geovetenskaper

   Author : Patrick Stephan Zens; [2018]
   Keywords : continuous flow analysis; Greenland; shallow firn core; aerosol; snow accumulation; glaciochemistry; kontinuerlig flödesanalys; Grönland; grunda firnkärnor; aerosol; snöackumulering; glaciokemi;

   Abstract : Ice, firn and snow cores from the Greenland ice sheet offer a unique opportunity to reconstruct past climate conditions. These can be analyzed with continuous flow analysis (CFA) in order to acquire proxy information about ancient atmospheric aerosol concentrations, snow accumulation rates or temperature variations, atmospheric composition, solar activity as well as volcanism and biological activity. READ MORE

3. 7. Drilling for time: ice cores and the synchronization of temporalities in glaciology, 1935-1978

   University essay from Lunds universitet/Avdelningen för idé- och lärdomshistoria

   Author : Erik Isberg; [2018]
   Keywords : ice cores; Arctic science; temporalities; Environmental humanities; climate modelling; history of science; Willi Dansgaard; Anthropocene; synchronization; temporal regimes; Cultural Sciences;

   Abstract : Since their emergence in the 1950’s, ice cores have ventured from being scientific objects of concern to a limited number of glaciologists to becoming one of the most iconic representations of anthropogenic climate change. This thesis aims to historicize the way in which ice cores became enrolled into climate discourse, particularly emphasizing the production and representation of temporalities of the global climate that the ice cores made possible. READ MORE

4. 8. Multiradionuclide evidence for an extreme solar proton event around 2610 BP

   University essay from Lunds universitet/Geologiska institutionen

   Author : Martin Paschal Ohare; [2017]
   Keywords : cosmic-rays; cosmogenic radionuclides; NGRIP; GRIP; solar proton event; SPE; Earth and Environmental Sciences;

   Abstract : Recently it has been confirmed that extreme solar proton events (SPE) can lead to significantly increased production of cosmogenic radionuclides (Mekhaldi et al. 2015). The evidence of these events can be recorded in tree rings (14C) and ice cores (10Be, 36Cl). READ MORE

5. 9. The chemical composition of hot and cold gas giants

   University essay from Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation; Lunds universitet/Astronomi - Genomgår omorganisation

   Author : Linn Eriksson; [2016]
   Keywords : Planet formation; hot Jupiter; pebble accretion; Physics and Astronomy;

   Abstract : Exoplanet surveys have identified a category of giant planets that orbit very close to their host stars - the so-called hot Jupiters. The origin of such hot Jupiters is a long standing puzzle and has been closely investigated since the first discovery of such planets in 1995. READ MORE

6. 10. The dynamics of Beryllium 10 transport and deposition in lake sediments

   University essay from Lunds universitet/Geologiska institutionen

   Author : Oskar Henriksson; [2016]
   Keywords : solar activity; Beryllium-10; lake sediment; 10Be; solar cycle; Earth and Environmental Sciences;

   Abstract : Lake sediments have lately been explored as a 10Be archive, complementing previous research on ice cores and marine sediments. 10Be is an important proxy as it can be used to study past solar activity, a factor which affects the climate. READ MORE