Articles | Volume 16, issue 7
https://doi.org/10.5194/acp-16-4251-2016
https://doi.org/10.5194/acp-16-4251-2016
Research article
 | 
05 Apr 2016
Research article |  | 05 Apr 2016

Detecting moisture transport pathways to the subtropical North Atlantic free troposphere using paired H2O-δD in situ measurements

Yenny González, Matthias Schneider, Christoph Dyroff, Sergio Rodríguez, Emanuel Christner, Omaira Elena García, Emilio Cuevas, Juan Jose Bustos, Ramon Ramos, Carmen Guirado-Fuentes, Sabine Barthlott, Andreas Wiegele, and Eliezer Sepúlveda

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Short summary
Measurements of water vapour isotopologues, dust, and a back trajectory model were used to identify moisture pathways in the subtropical North Atlantic. Dry air masses, from condensation at low temperatures, are transported from high altitudes and latitudes. The humid sources are related to the mixture, with lower and more humid air during transport. Rain re-evaporation was an occasional source of moisture. In summer, an important humidity source is the strong dry convection over the Sahara.
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