Project Details
Projekt
Tracer measurements with HAGAR-V during the HALO mission ASCCI to investigate chemical composition and transport in the Arctic springtime UTLS
Applicant
Professor C. Michael Volk, Ph.D.
Subject Area
Atmospheric Science
Term
since 2025
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 552861904
In the frame of this project we propose i) in situ measurements of a suite of tracers with the HAGAR-V instrument during the HALO ASCCI mission in the Arctic UTLS in early spring 2025 and ii) analysis of the obtained HAGAR-V tracer data toward the scientific goals of that mission. HAGAR-V combines a fast CO2 measurement by NDIR analyzer, a 2-channel GC/ECD-system measuring long-lived tracers (SF6 and F12 every 40 s; Halon-1211, F11 and F113 every 80 s) and a 2-channel GC/MS system targeting a suite of 29 tracer species every 120 s, including very short-lived NMHC (C2H2, C6H6, iso-/n-C4H10, iso-/n-C5H12), short-lived halocarbons (CH2Cl2, CHCl3, C2Cl4, CH5Cl, CH2Br2, CH3I) and further long-lived halocarbons (HFC-125, HFC-134a, HFC-32, F114, F115, CCl4, HCFC-22, HCFC-141b, HCFC-142b, Halon-2402, CHCl3, CH3Br). HAGAR-V thus covers most major chlorine and bromine source gases as well as the most important chlorinated VSLS, and also provides biomass burning tracers (C2H2, C6H6 and CH3Cl), further tracers for anthropogenic pollution (CH2Cl2, C2Cl4) and the classical stratospheric age tracers (SF6 and CO2). Local lifetimes of these species at the midlatitude tropopause range from several days to many years. The analysis of the highly resolved and precise HAGAR-V tracer data will contribute to the scientific themes of ASCCI by addressing a number of the missions’ objectives related to Arctic stratospheric ozone loss, its impact on the midlatitude UTLS by transport and mixing, and the role of chemistry and tropospheric pollution for ozone in the Arctic upper troposphere and lowermost stratosphere.
DFG Programme
Infrastructure Priority Programmes
