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Verlagsausgabe
DOI: 10.5445/IR/1000085881
Veröffentlicht am 24.09.2018

Mercury distribution in the upper troposphere and lowermost stratosphere according to measurements by the IAGOS-CARIBIC observatory: 2014-2016

Slemr, F.; Weigelt, A.; Ebinghaus, R.; Bieser, J.; Brenninkmeijer, C. A. M.; Rauthe-Schöch, A.; Hermann, M.; Martinsson, B. G.; Van Velthoven, P.; Bönisch, H.; Neumaier, M.; Zahn, A.; Ziereis, H.

Abstract:
Mercury was measured onboard the IAGOSCARIBIC passenger aircraft from May 2005 until February 2016 during near monthly sequences of mostly four intercontinental flights from Germany to destinations in North and South America, Africa and South and East Asia. Most of these mercury data were obtained using an internal default signal integration procedure of the Tekran instrument but since April 2014 more precise and accurate data were obtained using post-flight manual integration of the instrument raw signal. In this paper we use the latter data. Increased upper tropospheric total mercury (TM) concentrations due to large scale biomass burning were observed in the upper troposphere (UT) at the equator and southern latitudes during the flights to Latin America and South Africa in boreal autumn (SON) and boreal winter (DJF). TM concentrations in the lowermost stratosphere (LMS) decrease with altitude above the thermal tropopause but the gradient is less steep than reported before. Seasonal variation of the vertical TM distribution in the UT and LMS is similar to that of other trace gases with surface sources and stratospheric sinks. Speci ... mehr


Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 1680-7316, 1680-7324
URN: urn:nbn:de:swb:90-858813
KITopen ID: 1000085881
Erschienen in Atmospheric chemistry and physics
Band 18
Heft 16
Seiten 12329-12343
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