TY  - JOUR
AU  - Griessbach, Sabine
AU  - Hoffmann, Lars
AU  - Spang, Reinhold
AU  - von Hobe, Marc
AU  - Müller, Rolf
AU  - Riese, Martin
TI  - Infrared limb emission measurements of aerosol in the troposphere and stratosphere
JO  - Atmospheric measurement techniques
VL  - 9
IS  - 9
SN  - 1867-8548
CY  - Katlenburg-Lindau
PB  - Copernicus
M1  - FZJ-2016-04696
SP  - 4399 - 4423
PY  - 2016
AB  - Altitude-resolved aerosol detection in the upper troposphere and lower stratosphere (UTLS) is a challenging task for remote sensing instruments. Infrared limb emission measurements provide vertically resolved global measurements at day- and nighttime in the UTLS. For high-spectral-resolution infrared limb instruments we present here a new method to detect aerosol and separate between ice and non-ice particles. The method is based on an improved aerosol–cloud index that identifies infrared limb emission spectra affected by non-ice aerosol or ice clouds. For the discrimination between non-ice aerosol and ice clouds we employed brightness temperature difference correlations. The discrimination thresholds for this method were derived from radiative transfer simulations (including scattering) and Michelson Interferometer for Passive Atmospheric Sounding (MIPAS)/Envisat measurements obtained in 2011. We demonstrate the value of this approach for observations of volcanic ash and sulfate aerosol originating from the Grímsvötn (Iceland, 64° N), Puyehue–Cordón Caulle (Chile, 40° S), and Nabro (Eritrea, 13° N) eruptions in May and June 2011 by comparing the MIPAS volcanic aerosol detections with Atmospheric Infrared Sounder (AIRS) volcanic ash and SO2 measurements.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000383964700002
DO  - DOI:10.5194/amt-9-4399-2016
UR  - https://juser.fz-juelich.de/record/818205
ER  -