A Source–Receptor Perspective on the Polar Hydrologic Cycle: Sources, Seasonality, and Arctic–Antarctic Parity in the Hydrologic Cycle Response to CO 2 Doubling

Singh, Hansi K. A.; Bitz, Cecilia M.; Donohoe, Aaron; Rasch, Philip J.

doi:10.1175/JCLI-D-16-0917.1

Title: A Source–Receptor Perspective on the Polar Hydrologic Cycle: Sources, Seasonality, and Arctic–Antarctic Parity in the Hydrologic Cycle Response to CO ₂ Doubling

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Abstract

Numerical water tracers implemented in a global climate model are used to study how polar hydroclimate responds to CO ₂ -induced warming from a source–receptor perspective. Although remote moisture sources contribute substantially more to polar precipitation year-round in the mean state, an increase in locally sourced moisture is crucial to the winter season polar precipitation response to greenhouse gas forcing. In general, the polar hydroclimate response to CO ₂ -induced warming is strongly seasonal: over both the Arctic and Antarctic, locally sourced moisture constitutes a larger fraction of the precipitation in winter, while remote sources become even more dominant in summer. Increased local evaporation in fall and winter is coincident with sea ice retreat, which greatly augments local moisture sources in these seasons. In summer, however, larger contributions from more remote moisture source regions are consistent with an increase in moisture residence times and a longer moisture transport length scale, which produces a robust hydrologic cycle response to CO ₂ -induced warming globally. The critical role of locally sourced moisture in the hydrologic cycle response of both the Arctic and Antarctic is distinct from controlling factors elsewhere on the globe; for this reason, great care should be taken in interpretingmore »« less

Authors:

Singh, Hansi K. A. ^[1]; Bitz, Cecilia M. ^[2]; Donohoe, Aaron ^[3]; Rasch, Philip J. ^[1]

Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, Washington
Department of Atmospheric Sciences, University of Washington, Seattle, Washington
Applied Physics Laboratory, University of Washington, Seattle, Washington

Publication Date:: 2017-12-01

Sponsoring Org.:: USDOE Office of Science (SC), Biological and Environmental Research (BER)

OSTI Identifier:: 1409718

Grant/Contract Number:: Linus Pauling Distinguished Postdoctoral Fellowship

Resource Type:: Published Article

Journal Name:: Journal of Climate

Additional Journal Information:: Journal Name: Journal of Climate Journal Volume: 30 Journal Issue: 24; Journal ID: ISSN 0894-8755

Publisher:: American Meteorological Society

Country of Publication:: United States

Language:: English

Citation Formats


                    Singh, Hansi K. A., Bitz, Cecilia M., Donohoe, Aaron, and Rasch, Philip J. A Source–Receptor Perspective on the Polar Hydrologic Cycle: Sources, Seasonality, and Arctic–Antarctic Parity in the Hydrologic Cycle Response to CO 2 Doubling.  United States: N. p., 2017. 
Web.  doi:10.1175/JCLI-D-16-0917.1.

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                    Singh, Hansi K. A., Bitz, Cecilia M., Donohoe, Aaron, & Rasch, Philip J. A Source–Receptor Perspective on the Polar Hydrologic Cycle: Sources, Seasonality, and Arctic–Antarctic Parity in the Hydrologic Cycle Response to CO 2 Doubling.  United States.  https://doi.org/10.1175/JCLI-D-16-0917.1

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                    Singh, Hansi K. A., Bitz, Cecilia M., Donohoe, Aaron, and Rasch, Philip J. Fri .  
"A Source–Receptor Perspective on the Polar Hydrologic Cycle: Sources, Seasonality, and Arctic–Antarctic Parity in the Hydrologic Cycle Response to CO 2 Doubling".  United States.  https://doi.org/10.1175/JCLI-D-16-0917.1.

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@article{osti_1409718,

  title        = {A Source–Receptor Perspective on the Polar Hydrologic Cycle: Sources, Seasonality, and Arctic–Antarctic Parity in the Hydrologic Cycle Response to CO 2 Doubling},

  author       = {Singh, Hansi K. A. and Bitz, Cecilia M. and Donohoe, Aaron and Rasch, Philip J.},

  abstractNote = {Numerical water tracers implemented in a global climate model are used to study how polar hydroclimate responds to CO 2 -induced warming from a source–receptor perspective. Although remote moisture sources contribute substantially more to polar precipitation year-round in the mean state, an increase in locally sourced moisture is crucial to the winter season polar precipitation response to greenhouse gas forcing. In general, the polar hydroclimate response to CO 2 -induced warming is strongly seasonal: over both the Arctic and Antarctic, locally sourced moisture constitutes a larger fraction of the precipitation in winter, while remote sources become even more dominant in summer. Increased local evaporation in fall and winter is coincident with sea ice retreat, which greatly augments local moisture sources in these seasons. In summer, however, larger contributions from more remote moisture source regions are consistent with an increase in moisture residence times and a longer moisture transport length scale, which produces a robust hydrologic cycle response to CO 2 -induced warming globally. The critical role of locally sourced moisture in the hydrologic cycle response of both the Arctic and Antarctic is distinct from controlling factors elsewhere on the globe; for this reason, great care should be taken in interpreting polar isotopic proxy records from climate states unlike the present.},

  doi          = {10.1175/JCLI-D-16-0917.1},

  journal      = {Journal of Climate},

  number       = 24,

  volume       = 30,

  place        = {United States},

  year         = {2017},

  month        = {12}

}

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Title: A Source–Receptor Perspective on the Polar Hydrologic Cycle: Sources, Seasonality, and Arctic–Antarctic Parity in the Hydrologic Cycle Response to CO 2 Doubling

Abstract

Citation Formats

Title: A Source–Receptor Perspective on the Polar Hydrologic Cycle: Sources, Seasonality, and Arctic–Antarctic Parity in the Hydrologic Cycle Response to CO ₂ Doubling