Reactive hydro- and chlorocarbons in the troposphere and lower stratosphere:Sources, distributions, and chemical impact
The work presented in this thesis focuses on measurements of chemical reactive C2 C7 non-methane hydrocarbons (NMHC) and C1 C2 chlorocarbons with atmospheric lifetimes of a few hours up to about a year. The group of reactive chlorocarbons includes the most abundant atmospheric species with large nat...
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ftunigroningenpu:oai:pure.rug.nl:publications/f45e31f5-1f7b-4b15-96f9-f83fa9779735 2024-06-02T08:12:14+00:00 Reactive hydro- and chlorocarbons in the troposphere and lower stratosphere:Sources, distributions, and chemical impact Scheeren, Bert 2003 https://hdl.handle.net/11370/f45e31f5-1f7b-4b15-96f9-f83fa9779735 https://research.rug.nl/en/publications/f45e31f5-1f7b-4b15-96f9-f83fa9779735 http://dspace.library.uu.nl/handle/1874/700 eng eng https://research.rug.nl/en/publications/f45e31f5-1f7b-4b15-96f9-f83fa9779735 urn:ISBN:90-393-3466-8 info:eu-repo/semantics/restrictedAccess Scheeren , B 2003 , ' Reactive hydro- and chlorocarbons in the troposphere and lower stratosphere : Sources, distributions, and chemical impact ' , Doctor of Philosophy , Wageningen . chlorocarbons long-range transport stratosphere-troposphere exchange reactive hydrocarbons ozone book 2003 ftunigroningenpu 2024-05-07T21:00:52Z The work presented in this thesis focuses on measurements of chemical reactive C2 C7 non-methane hydrocarbons (NMHC) and C1 C2 chlorocarbons with atmospheric lifetimes of a few hours up to about a year. The group of reactive chlorocarbons includes the most abundant atmospheric species with large natural sources, which are chloromethane (CH3Cl), dichloromethane (CH2Cl2), and trichloromethane (CHCl3), and tetrachloroethylene (C2Cl4) with mainly anthropogenic sources. The NMHC and chlorocarbons are present at relatively low quantities in our atmosphere (10-12 10-9 mol mol-1 of air). Nevertheless, they play a key role in atmospheric photochemistry. For example, the oxidation of NMHC plays a dominant role in the formation of ozone in the troposphere, while the photolysis of chlorocarbons contributes to enhanced ozone depletion in the stratosphere. In spite of their important role, however, their global source and sinks budgets are still poorly understood. Hence, this study aims at improving our understanding of the sources, distribution, and chemical role of reactive NMHC and chlorocarbons in the troposphere and lower stratosphere. To meet this aim, a comprehensive data set of selected C2 C7 NMHC and chlorocarbons has been analyzed, derived from six aircraft measurement campaigns with two different jet aircrafts (the Dutch TUD/NLR Cessna Citation PH-LAB, and the German DLR Falcon) conducted between 1995 and 2001 (STREAM 1995 and 1997 and 1998, LBA-CLAIRE 1998, INDOEX 1999, MINOS 2001). The NMHC and chlorocarbons have been detected by gas-chromatography (GC-FID/ECD) in pre-concentrated whole air samples collected in stainless steel canister on-board the measurement aircrafts. The measurement locations include tropical (Maldives/Indian Ocean and Surinam), midlatitude (Western Europe and Canada) and polar regions (Lapland/northern Sweden) between the equator to about 70ºN, covering different seasons and pollution levels in the troposphere and lower stratosphere. Of special interest in this thesis are the tropical ... Book Northern Sweden Lapland University of Groningen research database Canada Fid ENVELOPE(-65.939,-65.939,-68.664,-68.664) Indian |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
topic |
chlorocarbons long-range transport stratosphere-troposphere exchange reactive hydrocarbons ozone |
spellingShingle |
chlorocarbons long-range transport stratosphere-troposphere exchange reactive hydrocarbons ozone Scheeren, Bert Reactive hydro- and chlorocarbons in the troposphere and lower stratosphere:Sources, distributions, and chemical impact |
topic_facet |
chlorocarbons long-range transport stratosphere-troposphere exchange reactive hydrocarbons ozone |
description |
The work presented in this thesis focuses on measurements of chemical reactive C2 C7 non-methane hydrocarbons (NMHC) and C1 C2 chlorocarbons with atmospheric lifetimes of a few hours up to about a year. The group of reactive chlorocarbons includes the most abundant atmospheric species with large natural sources, which are chloromethane (CH3Cl), dichloromethane (CH2Cl2), and trichloromethane (CHCl3), and tetrachloroethylene (C2Cl4) with mainly anthropogenic sources. The NMHC and chlorocarbons are present at relatively low quantities in our atmosphere (10-12 10-9 mol mol-1 of air). Nevertheless, they play a key role in atmospheric photochemistry. For example, the oxidation of NMHC plays a dominant role in the formation of ozone in the troposphere, while the photolysis of chlorocarbons contributes to enhanced ozone depletion in the stratosphere. In spite of their important role, however, their global source and sinks budgets are still poorly understood. Hence, this study aims at improving our understanding of the sources, distribution, and chemical role of reactive NMHC and chlorocarbons in the troposphere and lower stratosphere. To meet this aim, a comprehensive data set of selected C2 C7 NMHC and chlorocarbons has been analyzed, derived from six aircraft measurement campaigns with two different jet aircrafts (the Dutch TUD/NLR Cessna Citation PH-LAB, and the German DLR Falcon) conducted between 1995 and 2001 (STREAM 1995 and 1997 and 1998, LBA-CLAIRE 1998, INDOEX 1999, MINOS 2001). The NMHC and chlorocarbons have been detected by gas-chromatography (GC-FID/ECD) in pre-concentrated whole air samples collected in stainless steel canister on-board the measurement aircrafts. The measurement locations include tropical (Maldives/Indian Ocean and Surinam), midlatitude (Western Europe and Canada) and polar regions (Lapland/northern Sweden) between the equator to about 70ºN, covering different seasons and pollution levels in the troposphere and lower stratosphere. Of special interest in this thesis are the tropical ... |
format |
Book |
author |
Scheeren, Bert |
author_facet |
Scheeren, Bert |
author_sort |
Scheeren, Bert |
title |
Reactive hydro- and chlorocarbons in the troposphere and lower stratosphere:Sources, distributions, and chemical impact |
title_short |
Reactive hydro- and chlorocarbons in the troposphere and lower stratosphere:Sources, distributions, and chemical impact |
title_full |
Reactive hydro- and chlorocarbons in the troposphere and lower stratosphere:Sources, distributions, and chemical impact |
title_fullStr |
Reactive hydro- and chlorocarbons in the troposphere and lower stratosphere:Sources, distributions, and chemical impact |
title_full_unstemmed |
Reactive hydro- and chlorocarbons in the troposphere and lower stratosphere:Sources, distributions, and chemical impact |
title_sort |
reactive hydro- and chlorocarbons in the troposphere and lower stratosphere:sources, distributions, and chemical impact |
publishDate |
2003 |
url |
https://hdl.handle.net/11370/f45e31f5-1f7b-4b15-96f9-f83fa9779735 https://research.rug.nl/en/publications/f45e31f5-1f7b-4b15-96f9-f83fa9779735 http://dspace.library.uu.nl/handle/1874/700 |
long_lat |
ENVELOPE(-65.939,-65.939,-68.664,-68.664) |
geographic |
Canada Fid Indian |
geographic_facet |
Canada Fid Indian |
genre |
Northern Sweden Lapland |
genre_facet |
Northern Sweden Lapland |
op_source |
Scheeren , B 2003 , ' Reactive hydro- and chlorocarbons in the troposphere and lower stratosphere : Sources, distributions, and chemical impact ' , Doctor of Philosophy , Wageningen . |
op_relation |
https://research.rug.nl/en/publications/f45e31f5-1f7b-4b15-96f9-f83fa9779735 urn:ISBN:90-393-3466-8 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1800758609639899136 |