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Volume 17, issue 15
Atmos. Chem. Phys., 17, 9645–9663, 2017
https://doi.org/10.5194/acp-17-9645-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Atmos. Chem. Phys., 17, 9645–9663, 2017
https://doi.org/10.5194/acp-17-9645-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 10 Aug 2017

Research article | 10 Aug 2017

Importance of the Saharan heat low in controlling the North Atlantic free tropospheric humidity budget deduced from IASI δD observations

Jean-Lionel Lacour et al.

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AR by Jean-Lionel Lacour on behalf of the Authors (09 Jul 2017)  Author's response    Manuscript
ED: Publish subject to technical corrections (10 Jul 2017) by Heini Wernli
AR by Jean-Lionel Lacour on behalf of the Authors (10 Jul 2017)  Author's response    Manuscript
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Short summary
We present temporal and spatial δD distributions derived from IASI obtained above the North Atlantic in the vicinity of West Africa. We show that the seasonality of δD in the North Atlantic is closely associated with the influence of the Saharan heat low (SHL). We provide an interpretation of the temporal and spatial variations in δD and show that the interactions between the large-scale subsidence, the ITCZ, and the SHL can be disentangled thanks to the added information contained in δD.
We present temporal and spatial δD distributions derived from IASI obtained above the North...
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