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Earth System Dynamics An interactive open-access journal of the European Geosciences Union

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Earth Syst. Dynam., 9, 611-625, 2018
https://doi.org/10.5194/esd-9-611-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
23 May 2018
A new pattern of the moisture transport for precipitation related to the drastic decline in Arctic sea ice extent
Luis Gimeno-Sotelo1, Raquel Nieto2, Marta Vázquez2, and Luis Gimeno2 1Facultade de Matemáticas, Universidade de Santiago de Compostela, Santiago de Compostela, 15782 Spain
2Environmental Physics Laboratory (EphysLab), Universidade de Vigo, Ourense, 32004, Spain
Abstract. In this study we use the term moisture transport for precipitation for a target region as the moisture coming to this region from its major moisture sources resulting in precipitation over the target region (MTP). We have identified changes in the pattern of moisture transport for precipitation over the Arctic region, the Arctic Ocean, and its 13 main subdomains concurrent with the major sea ice decline that occurred in 2003. The pattern consists of a general decrease in moisture transport in summer and enhanced moisture transport in autumn and early winter, with different contributions depending on the moisture source and ocean subregion. The pattern is statistically significant and consistent with changes in the vertically integrated moisture fluxes and frequency of circulation types. The results of this paper also reveal that the assumed and partially documented enhanced poleward moisture transport from lower latitudes as a consequence of increased moisture from climate change seems to be less simple and constant than typically recognised in relation to enhanced Arctic precipitation throughout the year in the present climate.
Citation: Gimeno-Sotelo, L., Nieto, R., Vázquez, M., and Gimeno, L.: A new pattern of the moisture transport for precipitation related to the drastic decline in Arctic sea ice extent, Earth Syst. Dynam., 9, 611-625, https://doi.org/10.5194/esd-9-611-2018, 2018.
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Short summary
We have identified changes in the pattern of moisture transport for precipitation over the Arctic region, the Arctic Ocean, and its 13 main subdomains concurrent with the major sea ice decline that occurred in 2003. The pattern consists of a general decrease in moisture transport in summer and enhanced moisture transport in autumn and early winter, with different contributions depending on the moisture source and ocean subregion.
We have identified changes in the pattern of moisture transport for precipitation over the...
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