Reference : Long-term trends of inorganic chlorine from ground-based infrared solar spectra: Past...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
http://hdl.handle.net/2268/2492
Long-term trends of inorganic chlorine from ground-based infrared solar spectra: Past increases and evidence for stabilization
English
Rinsland, Curtis P. [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS) >]
Mahieu, Emmanuel mailto [Université de Liège - ULg > Services généraux (Faculté des sciences) > Relations académiques et scientifiques (Sciences) >]
Zander, Rodolphe mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS) >]
Jones, Nicholas B. [University of Denver > Department of Physics >]
Chipperfield, Martyn P. [> > > >]
Goldman, Aaron [> > > >]
Anderson, John [> > > >]
Russell III, Jim M. [> > > >]
Demoulin, Philippe mailto [> > > >]
Notholt, Justus [> > > >]
Toon, Geoffrey C. [> > > >]
Blavier, Jean-François [> > > >]
Sen, Bashwar [> > > >]
Sussmann, Ralf [> > > >]
Wood, Stephen W. [> > > >]
Meier, Arndt [> > > >]
Griffith, Dave W. T. [> > > >]
Chiou, Linda S. [> > > >]
Murcray, Frank J. [> > > >]
Stephen, T. M. [> > > >]
Hase, Frank [> > > >]
Mikuteit, Sabine [> > > >]
Shulz, Astrid [> > > >]
Blumenstock, Thomas [> > > >]
26-Apr-2003
Journal of Geophysical Research
American Geophysical Union
108
D8
4252
Yes (verified by ORBi)
International
0148-0227
Washington
DC
[en] inorganic chlorine ; infrared spectroscopy ; atmospheric composition
[fr] inorganic chlorine ; hydrogen chloride ; chlorine nitrate
[en] Long-term time series of hydrogen chloride (HCl) and chlorine nitrate (ClONO2) total column abundances has been retrieved from high spectral resolution ground-based solar absorption spectra recorded with infrared Fourier transform spectrometers at nine NDSC (Network for the Detection of Stratospheric Change) sites in both Northern and Southern Hemispheres. The data sets span up to 24 years and most extend until the end of 2001. The time series of Cly (defined here as the sum of the HCl and ClONO2 columns) from the three locations with the longest time-span records show rapid increases until the early 1990s superimposed on marked day-to-day, seasonal and inter-annual variability. Subsequently, the buildup in Cly slows and reaches a broad plateau after 1996, also characterized by variability. A similar time evolution is also found in the total chlorine concentration at 55 km altitude derived from Halogen Occultation
Experiment (HALOE) global observations since 1991. The stabilization of inorganic chlorine observed in both the total columns and at 55 km altitude indicates that the near-global 1993 organic chlorine (CCly) peak at the Earth’s surface has now propagated over a broad altitude range in the upper atmosphere, though the time lag is difficult to quantify precisely from the current data sets, due to variability. We compare the three longest measured time series with two-dimensional model calculations extending from 1977 to 2010, based on a halocarbon scenario that assumes past measured trends and a realistic extrapolation into the future. The model predicts broad Cly maxima consistent with the long-term observations, followed by a
slow Cly decline reaching 12–14% relative to the peak by 2010. The data reported here confirm the effectiveness of the Montreal Protocol and its Amendments and Adjustments in progressively phasing out the major man-related perturbations of the stratospheric ozone layer, in particular, the anthropogenic chlorine-bearing source gases.
http://hdl.handle.net/2268/2492
10.1029/2002JD003001
http://www.agu.org/pubs/crossref/2003/2002JD003001.shtml

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