(Last update: 21.12.2011 / GW)
First GLORIA and MIPAS-STR aircraft campaign in December 2011
Successfull MIPAS balloon campaign on 31 March 2011
First remote sensing measurements of the chlorine monoxide dimer ClOOCl
Successfull MIPAS balloon campaign on 24 January 2010
MIPAS-STR participates in RECONCILE campaign
First GLORIA and MIPAS-STR aircraft campaign in December 2011
The new imaging FTS GLORIA accomplished its first two flights sucessfully. For more information, please see KIT press release (177/2011) and SWR media centre. GLORIA and MIPAS-STR flights aboard the GEOPHYSICA aircraft were carried out from Kiruna (Sweden) within the frame of the ESSENCE campaign.
Successful MIPAS balloon campaign on 31 March 2011
The scientific balloon flight MIPAS-B/TELIS/mini-DOAS embedded in the ENRICHED project was launched by CNES on 31 March 2011 from Esrange (67.9°N, 21.1°E) near Kiruna at 0:46 local time. After a long ascent the balloon reached a maximum altitude of 35.4 km. It was cut at 7:00 local time after about 2:40 min at float and touched down in Russia at 7:40 local time.
Roll-out of the gondola for launch in Esrange/Kiruna.
First remote sensing measurements of the chlorine monoxide dimer ClOOCl
The ClO dimer cycle plays a dominant role in the catalytic destruction of stratospheric ozone in the springtime polar vortex. ClOOCl observations, obtained in the Arctic vortex above northern Scandinavia on 11 January 2001 by the balloon-borne MIPAS (MIPAS-B), show enhanced values of nearly 1.1 ppbv at 20 km in an activated chlorine layer which are in line with the established polar chlorine chemistry. For details, see Wetzel et al. (2010), Atmos Chem. Phys., 10, 931-945, 2010 and KIT press release (086/2010).
Chlorine species as measured by MIPAS-B on 11 January 2001 above northern Scandinavia inside the polar vortex. Besides ClONO2, ClO, ClOOCl, and ClOx, total inorganic chlorine (Cly*), calculated from a N2O-Cly correlation, are shown, too.
Successfull MIPAS balloon campaign on 24 January 2010
The MIPAS-B gondola was launched successfully at 01:46 local time on 24 January 2010 from Esrange near Kiruna (Sweden). Besides MIPAS, the gondola also carried the TeraHertz Limb Sounder TELIS, operated by DLR / SRON, and a Differential Optical Absorption Spectrometer (mini-DOAS) operated by the University of Heidelberg.
The balloon (right) and the gondola hanging under the launch vehicle (left) just before the launch.
The scientific objective of this flight has been two-fold: One goal has been validation of the space experiments ENVISAT and SMILES. The other goal has been to measure the time-dependent chemistry of chlorine and bromine, and to achieve the closure of chemical families (NOy, Cly, Bry, HOx). The measurements have been performed using remote sensing spectroscopic techniques covering the spectral range from the UV via the IR to the MW. Altogether these techniques allow the measurement of more than 30 atmospheric species.
The vortex situation on 24 January 2010 at 30 hPa (~22 km), the coldest levels.
The balloon trajectory of the MIPAS-B/TELIS/mini-DOAS flight.
The balloon reached the float level of 34 km at around 05:00, heading towards the Baltic sea for several hours before it almost stopped and turned around into Finland. Around 13:00 the valve was opened for a slow descent down to 25 km, then the gondola was cut at 14:40 and safely landed in Finland.
The gondola after touchdown in Finland.
Early morning two days later the gondola was back to Esrange in good shape. All systems could be switched on and were working again.
First evaluation of the flight:
The balloon was launched right into the centre of the cold chlorine-activated vortex. Thanks to the meteorological situation and the timing of the balloon operations enabling more than 12 hours of measurements the following tasks could be achieved:
(1) to measure the time-dependent chemistry of activated chlorine (ClO and ClOOCl) from the night-time equilibrium until day
(2) to measure the almost complete partitioning and budget of the NOy and Cly families
(3) to match the overpasses of the ENVISAT and SMILES satellite observations
(4) to observe the same air masses as the Geophysica aircraft on the same day.
Both MIPAS and TELIS worked well, and the quick-look at the recorded spectra is very promising. Power problems prevented the mini-DOAS to measure well into daytime, unfortunately.
From a quick-look at the spectra we summarize qualitatively:
a) a significant redistribution of HNO3 pointing at denitrification above about 20 km and renitrification below
b) a strong chlorine activation with very little amounts of ClONO2 and enhanced ClO
c) a relatively slow build-up of ClO after sunrise.
MIPAS-STR participates in RECONCILE campaign
Research flights have been conducted between January 17 and February 2, 2010, each dedicated to specific scientific issues, such as PSC microphysics, chlorine activation, kinetics of the ClO dimer, NAT rock formation, de-/renitrification, and ozone loss. A second campaign phase was performed between February 27 and March 10, 2010.
For more information on how measurements are taken with the aircraft version of MIPAS and how the data are analysed, see: http://www.imk-asf.kit.edu/english/534.php
For more information on the RECONCILE field campaign and the related EU project, see: https://www.fp7-reconcile.eu/index.html
Christof Piesch, member of the MIPAS-STR team, pointing at a Polar Stratospheric Cloud (PSC) at the start of the
RECONCILE campaign. Such PSCs form at very cold temperatures of below -85°C at altitudes of about 17 to 28 km.
The Russian Geophysica aircraft, capable to fly up to 20 km altitude, in front of the Arena Arctica, a huge hangar at
Kiruna airport, designed for accommodating big aircraft and equipped with labs for a large number of scientific groups.
The MIPAS aircraft instrument is mounted on top of the aircraft between the wings. During flight the instrument is covered
by a dome. MIPAS-STR is capable of measuring cross sections of atmospheric constituents relevant for ozone and climate
research, such as O3, N2O, CH4, HNO3, ClONO2, and CFCs.
