{"id":{"repo_id":"heid-diss","oai_identifier":"oai:archiv.ub.uni-heidelberg.de:1407"},"canonical_url":"https://search.dev.ndltd.org/etd/heid-diss/oai:archiv.ub.uni-heidelberg.de:1407","repository":{"repo_id":"heid-diss","name":"Universität Heidelberg","base_url":"http://archiv.ub.uni-heidelberg.de/volltextserver/cgi/oai2"},"display":{"title":"Investigation of the stratospheric inorganic Bromine budget for 1996 - 2000 : balloon-borne measurements and model comparisons","abstract":"Inorganic bromine plays an important role in catalytic ozone depletion in the stratosphere at high and mid-latitudes. This study reports and discusses in detail stratospheric DOAS (Differential Optical Absorption Spectroscopy) BrO vertical profile measurements with direct sunlight, that were conducted aboard the french-german LPMA/DOAS (Laboratoire de Physique Moléculaire et Application) balloon gondola at mid and high northern latitudes during the years 1996 to 2000. The unprecedented high accuracy (+/-12) of the BrO measurements together with 3-D CTM and Lagrangian photochemical modelling provided new insights into the budget and chemistry of atmospheric bromine. These include (1) a thorough investigation of the present and recent budget of stratospheric bromine, (2) an improved understanding of the chemistry of stratospheric bromine, and (3) the first measurements of free tropospheric $BrO$ concentration profiles. The total inorganic bromine (in 5.6 year old air in 1999) determined from BrO measurements (21.5+/-3) ppt) was tested for the first time against the total stratospheric bromine inferred from the organic bromine method (18.4+/-1.8) ppt. The agreement of total bromine found with both methods is good, however, the consistently larger inorganic bromine suggests an influx (3.1+/-3.5 ppt) of inorganic bromine from the troposphere. This conclusion is supported by finding (3) and qualitatively by the recent detection of inorganic bromine at a 1 ppt level in the upper tropospheric aerosol. Thus this thesis could establish a more complete budget of stratospheric bromine. Also, a new DOAS retrieval algorithm was developed for the detection of chlorine dioxide (OClO) in the balloon-borne direct sun spectra. In all Arctic winter flights OClO could be detected - even at low chlorine activation. Surprisingly, OClO could also be measured in significant amounts (5-10 ppt at 20-30 km and a solar zenith angle (SZA) of 88-93°) during a fall","abstract_html":"Inorganic bromine plays an important role in catalytic ozone depletion in the stratosphere at high and mid-latitudes. This study reports and discusses in detail stratospheric DOAS (Differential Optical Absorption Spectroscopy) BrO vertical profile measurements with direct sunlight, that were conducted aboard the french-german LPMA/DOAS (Laboratoire de Physique Moléculaire et Application) balloon gondola at mid and high northern latitudes during the years 1996 to 2000. The unprecedented high accuracy (+/-12) of the BrO measurements together with 3-D CTM and Lagrangian photochemical modelling provided new insights into the budget and chemistry of atmospheric bromine. These include (1) a thorough investigation of the present and recent budget of stratospheric bromine, (2) an improved understanding of the chemistry of stratospheric bromine, and (3) the first measurements of free tropospheric $BrO$ concentration profiles. The total inorganic bromine (in 5.6 year old air in 1999) determined from BrO measurements (21.5+/-3) ppt) was tested for the first time against the total stratospheric bromine inferred from the organic bromine method (18.4+/-1.8) ppt. The agreement of total bromine found with both methods is good, however, the consistently larger inorganic bromine suggests an influx (3.1+/-3.5 ppt) of inorganic bromine from the troposphere. This conclusion is supported by finding (3) and qualitatively by the recent detection of inorganic bromine at a 1 ppt level in the upper tropospheric aerosol. Thus this thesis could establish a more complete budget of stratospheric bromine. Also, a new DOAS retrieval algorithm was developed for the detection of chlorine dioxide (OClO) in the balloon-borne direct sun spectra. In all Arctic winter flights OClO could be detected - even at low chlorine activation. Surprisingly, OClO could also be measured in significant amounts (5-10 ppt at 20-30 km and a solar zenith angle (SZA) of 88-93°) during a fall","abstract_has_math":true,"creators":["Fitzenberger, Richard"],"institution":"Universität Heidelberg","degree_name":null,"degree_level":"thesis.doctoral","degree_discipline":null,"degree_department":null,"school":null,"contributors":["Platt, Ulrich"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2000,"date_issued":"2000-11-08","date_published":"2000-11-08","updated_at":"2026-07-24T02:28:55Z","subjects":[],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://www.ub.uni-heidelberg.de/archiv/1407","outbound_label":"Repository record","outbound_source":"source_url"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Platt, Ulrich"]},{"key":"dc:creator","label":"Author","values":["Fitzenberger, Richard"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:publisher","label":"Institution","values":["Universitätsbibliothek Heidelberg"]},{"key":"dc:type","label":"Dc Type","values":["doctoralThesis"]},{"key":"thesis:degree_level","label":"Degree Level","values":["thesis.doctoral"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Universität Heidelberg"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Inorganic bromine plays an important role in catalytic ozone depletion in the stratosphere at high and mid-latitudes. This study reports and discusses in detail stratospheric DOAS (Differential Optical Absorption Spectroscopy) BrO vertical profile measurements with direct sunlight, that were conducted aboard the french-german LPMA/DOAS (Laboratoire de Physique Moléculaire et Application) balloon gondola at mid and high northern latitudes during the years 1996 to 2000. The unprecedented high accuracy (+/-12) of the BrO measurements together with 3-D CTM and Lagrangian photochemical modelling provided new insights into the budget and chemistry of atmospheric bromine. These include (1) a thorough investigation of the present and recent budget of stratospheric bromine, (2) an improved understanding of the chemistry of stratospheric bromine, and (3) the first measurements of free tropospheric $BrO$ concentration profiles. The total inorganic bromine (in 5.6 year old air in 1999) determined from BrO measurements (21.5+/-3) ppt) was tested for the first time against the total stratospheric bromine inferred from the organic bromine method (18.4+/-1.8) ppt. The agreement of total bromine found with both methods is good, however, the consistently larger inorganic bromine suggests an influx (3.1+/-3.5 ppt) of inorganic bromine from the troposphere. This conclusion is supported by finding (3) and qualitatively by the recent detection of inorganic bromine at a 1 ppt level in the upper tropospheric aerosol. Thus this thesis could establish a more complete budget of stratospheric bromine. Also, a new DOAS retrieval algorithm was developed for the detection of chlorine dioxide (OClO) in the balloon-borne direct sun spectra. In all Arctic winter flights OClO could be detected - even at low chlorine activation. Surprisingly, OClO could also be measured in significant amounts (5-10 ppt at 20-30 km and a solar zenith angle (SZA) of 88-93°) during a fall"]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Investigation of the stratospheric inorganic Bromine budget for 1996 - 2000 : balloon-borne measurements and model comparisons","Untersuchung des stratosphärischen anorganischen Brombudgets für 1996 - 2000 : ballongetragene Messungen und Modellvergleich"]}]}],"canonical_facts":{"dc:contributor":["Platt, Ulrich"],"dc:creator":["Fitzenberger, Richard"],"dc:description.abstract":["Inorganic bromine plays an important role in catalytic ozone depletion in the stratosphere at high and mid-latitudes. This study reports and discusses in detail stratospheric DOAS (Differential Optical Absorption Spectroscopy) BrO vertical profile measurements with direct sunlight, that were conducted aboard the french-german LPMA/DOAS (Laboratoire de Physique Moléculaire et Application) balloon gondola at mid and high northern latitudes during the years 1996 to 2000. The unprecedented high accuracy (+/-12) of the BrO measurements together with 3-D CTM and Lagrangian photochemical modelling provided new insights into the budget and chemistry of atmospheric bromine. These include (1) a thorough investigation of the present and recent budget of stratospheric bromine, (2) an improved understanding of the chemistry of stratospheric bromine, and (3) the first measurements of free tropospheric $BrO$ concentration profiles. The total inorganic bromine (in 5.6 year old air in 1999) determined from BrO measurements (21.5+/-3) ppt) was tested for the first time against the total stratospheric bromine inferred from the organic bromine method (18.4+/-1.8) ppt. The agreement of total bromine found with both methods is good, however, the consistently larger inorganic bromine suggests an influx (3.1+/-3.5 ppt) of inorganic bromine from the troposphere. This conclusion is supported by finding (3) and qualitatively by the recent detection of inorganic bromine at a 1 ppt level in the upper tropospheric aerosol. Thus this thesis could establish a more complete budget of stratospheric bromine. Also, a new DOAS retrieval algorithm was developed for the detection of chlorine dioxide (OClO) in the balloon-borne direct sun spectra. In all Arctic winter flights OClO could be detected - even at low chlorine activation. Surprisingly, OClO could also be measured in significant amounts (5-10 ppt at 20-30 km and a solar zenith angle (SZA) of 88-93°) during a fall"],"dc:format.medium":["application/pdf"],"dc:publisher":["Universitätsbibliothek Heidelberg"],"dc:title":["Investigation of the stratospheric inorganic Bromine budget for 1996 - 2000 : balloon-borne measurements and model comparisons","Untersuchung des stratosphärischen anorganischen Brombudgets für 1996 - 2000 : ballongetragene Messungen und Modellvergleich"],"dc:type":["doctoralThesis"],"thesis:degree_level":["thesis.doctoral"],"thesis:institution_name":["Universität Heidelberg"]},"updated_at":"2026-07-24T02:28:55Z"}