This document presents global observations of δD(H2) from multiple background stations and highlights new datasets that reveal seasonal and latitudinal variations in H2 levels. It discusses the impact of stratospheric processing on H2 mixing ratios and delves into isotope data's role in enhancing atmospheric models. The findings may also indicate potential new H2 sources over regions like India.

1. Global scale observations of δD(H2)
Anneke M. Batenburg
Gerben Pieterse, Sylvia Walter, Ingeborg Levin, Martina Schmidt, Armin
Jordan, Samuel Hammer, Camille Yver,
Tanja J. Schuck, Angela K. Baker, Andreas Zahn, Carl A. M. Brenninkmeijer,
and Thomas Röckmann

2. Introduction H2 sources and sinks

3. H2 budget with isotope
signatures
Introduction

4. Two new δD(H2) datasets
Time series from six globally
distributed background
stations
(Batenburg et al., Atmos. Chem. Phys., 11, 6985-6999, 2011)
Observations in the tropopause
region
(Batenburg et al., Atmos. Chem. Phys., 12, 4633-4646, 2012)

5. Background station time series The EUROHYDROS network

6. Background station time series Time series

7. Background station time series Highlight: Alert

8. Background station time series Latitudinal gradients

9. Background station time series Relative sink contribution

10. Two new δD(H2) datasets
Time series from six globally
distributed background stations
(Batenburg et al., Atmos. Chem. Phys., 11, 6985-6999, 2011)
Observations in the
tropopause region
(Batenburg et al., Atmos. Chem. Phys., 12, 4633-4646, 2012)

11. Observations around the TP In the stratosphere
Röckmann et al. (2003)

12. Observations around the TP In the stratosphere

13. In the stratosphere
Rahn et al. (2003)
Observations around the TP

14. Observations around the TP In the stratosphere
Result of
stratospheric
processing:
• H2 mixing ratio
changes little
• δD increases
dramatically.

15. Observations around the TP Stratospheric input
Pieterse et al., Atmos. Chem. Phys., 11, 7001-7026, 2011

16. Observations around the TP Geographical coverage

17. Observations around the TP Example: Caracas flights

18. Observations around the TP Stratospheric samples

19. Observations around the TP Stratospheric samples

20. Observations around the TP Stratospheric samples

21. Observations around the TP Monsoon samples

22. To sum up:
Ground station δD(H2) data
• show variation with season and latitude.
• contain source/sink information.
δD(H2) data from TP region
• yield better parameterization of δD(H2) in STE
• may show new source over India

23. Latest TM5 results
Isotope data help in
δD(H2) in models
distinguishing
between different
plausible scenarios
Pieterse et al., Reassessing
the variability in atmospheric
H2 using the two-way nested
TM5 model, submitted to
JGR

24. δD(H2) in models Improved budget

27. Introduction Future H2 use and leakage

28. Introduction Isotope δ notation
The δD(H2) value represents the deuterium-to-
hydrogen ratio in the H2 relative to a standard
(Vienna Standard Mean Ocean Water
(VSMOW)).

29. CARIBIC measurement container
Mass 1.5 ton Deployment monthly
Observations around the TP
Cargo door
Airbus
A 340-600
D-AIHE
Air inlet system
Permanent part

30. Observations around the TP Monsoon samples