Exchange of radiatively active trace gases in tundra environments, with particular attention to methane
This thesis is concerned with trace gas flux in tundra environments, the main subject of study being methane. Methane emission from tundra soils has in recent years attracted increasing attention due to the possible associated feed-back effect on man-made climate change. The presented data are prima...
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University of Cambridge
1994
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ftunivcam:oai:www.repository.cam.ac.uk:1810/300981 2024-01-21T10:09:03+01:00 Exchange of radiatively active trace gases in tundra environments, with particular attention to methane Christensen, Torben Røjle 1994-05-03 application/pdf https://www.repository.cam.ac.uk/handle/1810/300981 https://doi.org/10.17863/CAM.48056 eng eng University of Cambridge Scott Polar Research Institute https://www.repository.cam.ac.uk/handle/1810/300981 doi:10.17863/CAM.48056 All Rights Reserved http://www.rioxx.net/licenses/all-rights-reserved/ Thesis Doctoral Doctor of Philosophy (PhD) 1994 ftunivcam https://doi.org/10.17863/CAM.48056 2023-12-28T23:20:51Z This thesis is concerned with trace gas flux in tundra environments, the main subject of study being methane. Methane emission from tundra soils has in recent years attracted increasing attention due to the possible associated feed-back effect on man-made climate change. The presented data are primarily produced. during field work in Northern Alaska but it also includes work in Northern Sweden and laboratory studies in Copenhagen. Model experiments carried out on basis of the gathered data was carried out in cooperation with the Hadley Centre at the Meteorological Office in England. Chapter 1 describes the area of research and the general background for embarking on the project. It concludes by defining a number of questions which the research presented in the thesis will attempt to answer. The first two chapters in the main body of the thesis (Chapter 2 and 3) fonn an introduction to tundra ecology with emphasis on aspects which are directly related to controls on soil emission of trace gases. It is explained how trace gas balances of tundra soils primarily are climatically controlled. These dependencies form main subjects of study in the thesis. Chapters 4 and 5 contain an analysis of methane emission from tundra environments primaiily based on field work in Alaska and Sweden but also involving laboratory studies of soil cores from a boreal bog. The bulk of the data presented are flux measurements produced using a static chamber technique. Methane and carbon dioxide were also analysed for their isotopic signatures. The scale of methane emission and factors controlling the flux at temporal and spatial scales are investiga!ed and discussed in relation to the info1mation available in the literature. After identifying the controlling factors most useful as tools for predicting methane emission the thesis moves on to describe an attempt to model seasonal variations in flux at the main tundra site investigated (Chapter 6). This model forms prut of the Meteorological Office climate prediction programme. The model is ... Doctoral or Postdoctoral Thesis Northern Sweden Tundra Alaska Apollo - University of Cambridge Repository |
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Open Polar |
collection |
Apollo - University of Cambridge Repository |
op_collection_id |
ftunivcam |
language |
English |
description |
This thesis is concerned with trace gas flux in tundra environments, the main subject of study being methane. Methane emission from tundra soils has in recent years attracted increasing attention due to the possible associated feed-back effect on man-made climate change. The presented data are primarily produced. during field work in Northern Alaska but it also includes work in Northern Sweden and laboratory studies in Copenhagen. Model experiments carried out on basis of the gathered data was carried out in cooperation with the Hadley Centre at the Meteorological Office in England. Chapter 1 describes the area of research and the general background for embarking on the project. It concludes by defining a number of questions which the research presented in the thesis will attempt to answer. The first two chapters in the main body of the thesis (Chapter 2 and 3) fonn an introduction to tundra ecology with emphasis on aspects which are directly related to controls on soil emission of trace gases. It is explained how trace gas balances of tundra soils primarily are climatically controlled. These dependencies form main subjects of study in the thesis. Chapters 4 and 5 contain an analysis of methane emission from tundra environments primaiily based on field work in Alaska and Sweden but also involving laboratory studies of soil cores from a boreal bog. The bulk of the data presented are flux measurements produced using a static chamber technique. Methane and carbon dioxide were also analysed for their isotopic signatures. The scale of methane emission and factors controlling the flux at temporal and spatial scales are investiga!ed and discussed in relation to the info1mation available in the literature. After identifying the controlling factors most useful as tools for predicting methane emission the thesis moves on to describe an attempt to model seasonal variations in flux at the main tundra site investigated (Chapter 6). This model forms prut of the Meteorological Office climate prediction programme. The model is ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Christensen, Torben Røjle |
spellingShingle |
Christensen, Torben Røjle Exchange of radiatively active trace gases in tundra environments, with particular attention to methane |
author_facet |
Christensen, Torben Røjle |
author_sort |
Christensen, Torben Røjle |
title |
Exchange of radiatively active trace gases in tundra environments, with particular attention to methane |
title_short |
Exchange of radiatively active trace gases in tundra environments, with particular attention to methane |
title_full |
Exchange of radiatively active trace gases in tundra environments, with particular attention to methane |
title_fullStr |
Exchange of radiatively active trace gases in tundra environments, with particular attention to methane |
title_full_unstemmed |
Exchange of radiatively active trace gases in tundra environments, with particular attention to methane |
title_sort |
exchange of radiatively active trace gases in tundra environments, with particular attention to methane |
publisher |
University of Cambridge |
publishDate |
1994 |
url |
https://www.repository.cam.ac.uk/handle/1810/300981 https://doi.org/10.17863/CAM.48056 |
genre |
Northern Sweden Tundra Alaska |
genre_facet |
Northern Sweden Tundra Alaska |
op_relation |
https://www.repository.cam.ac.uk/handle/1810/300981 doi:10.17863/CAM.48056 |
op_rights |
All Rights Reserved http://www.rioxx.net/licenses/all-rights-reserved/ |
op_doi |
https://doi.org/10.17863/CAM.48056 |
_version_ |
1788699950018723840 |