VSLS measurementsin the tropical East Atlantic
Steffen Fuhlbrügge, Kirstin Krüger, Birgit Quack, Elliot Atlas,Helmke Hepach, Franziska Wittke and the DRIVE-Poseidon Team
14.07.2011
DRIVE: HySplit 10-day backward trajectories
HySplit calculations-- start of the cruise-- end of the cruise
Air sample analysis: Elliot AtlasFlux calculations: Helmke Hepach, PhD thesis
CHBr3:atmospheric concentrations [ppt]and air-sea flux (pmol/(m²*hr)]
Leg 2 CHBr3: atmospheric concentration Leg 2 CHBr3: air-sea fluxpptpmol
(m²*hr)
Leg 3 CHBr3: atmospheric concentration ppt
Air sample analysis: Elliot AtlasFlux calculations: Helmke Hepach, PhD thesis
CH2Br2:atmospheric concentrations [ppt]and air-sea flux (pmol/(m²*hr)]
Leg 3 CH2Br2: atmospheric concentration ppt
Leg 2 CH2Br2: atmospheric concentration Leg 2 CH2Br2: air-sea fluxpptpmol
(m²*hr)
Air sample analysis: Elliot AtlasFlux calculations: Helmke Hepach, PhD thesis
CH3I:atmospheric concentrations
[ppt]
Leg 2 CH3I: atmospheric concentration ppt
Leg 3 CH3I: atmospheric concentration ppt
CHBr3:MLH = -0.94CH2Br2:MLH = -0.94
CH3I:MLH = -0.54CHBr3:CH2Br2 = 0.97
CHBr3:CH3I = 0.69CH3I:CH2Br2 = 0.74
Correlations:
Date= 24 h station
Comparison/Correlation of trace gases and mixing layer height
Air mass classification: Open ocean5-day backward trajectories
1. station 2. station 3. station
CHBr
3
Air mass classification: Coast1-day backward trajectories
4. station 5. station 6. station
CHBr
3pp
t
1
rwd = 0.85
= 24 h station
Lower values ≈ younger sources