eprintid: 1407
rev_number: 8
eprint_status: archive
userid: 1
dir: disk0/00/00/14/07
datestamp: 2001-01-12 00:00:00
lastmod: 2014-04-03 10:36:15
status_changed: 2012-08-14 15:00:55
type: doctoralThesis
metadata_visibility: show
creators_name: Fitzenberger, Richard
title: Investigation of the stratospheric inorganic Bromine budget for 1996 - 2000 : balloon-borne measurements and model comparisons
title_de: Untersuchung des stratosphärischen anorganischen Brombudgets für 1996 - 2000 : ballongetragene Messungen und Modellvergleich
ispublished: pub
subjects: ddc-530
divisions: i-130500
adv_faculty: af-13
keywords: Brombudget, Chloraktivierung, Chlordioxid, Ballonmessungen, PhotochemieBromine, Budget, Chlorine, OClO, BrO
cterms_swd: Atmosphäre
cterms_swd: Bromoxidradikal
cterms_swd: Stratosphären-Ballon
abstract_translated_text: 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_translated_lang: eng
class_scheme: pacs
class_labels: and Astrop, PACS Categ, Astronomy
date: 2000
date_type: published
id_scheme: DOI
id_number: 10.11588/heidok.00001407
ppn_swb: 164318329X
own_urn: urn:nbn:de:bsz:16-opus-14077
date_accepted: 2000-11-08
advisor: HASH(0x561a6282f3e0)
language: eng
bibsort: FITZENBERGINVESTIGAT2000
full_text_status: public
citation:   Fitzenberger, Richard  (2000) Investigation of the stratospheric inorganic Bromine budget for 1996 - 2000 : balloon-borne measurements and model comparisons.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/1407/1/DissFit.pdf