Evaluating a Moist Isentropic Framework for Poleward Moisture Transport: Implications for Water Isotopes Over Antarctica
Abstract
The ability to identify moisture source regions and sinks, and to model the transport pathways that link them in simple yet physical ways, is critical for our understanding of climate today and in the past. Using water tagging and isotopic tracer experiments in the Community Earth System Model, combined with theoretical arguments, this work provides compelling evidence of the utility of a moist isentropic view of poleward moisture transport. Importantly, because conservation of moist entropy requires that air masses trade sensible and latent heat for potential energy, the moist isentropic framework provides strong energetic constraints on the atmosphere's effective rainout, which the isotope ratios of water vapor and precipitation record. The analysis confirms not only that distinct zonal bands supply moisture to high- and low-elevation polar sites, but also that changes in these source regions are inextricably linked to changes in temperature and rainout.
- Authors:
-
[1];
[2];
[3]
- National Center for Atmospheric Research, Boulder, CO (United States)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Univ. of Victoria, Victoria, British Columbia (Canada). School of Earth and Ocean Sciences
- NASA Goddard Inst. for Space Studies, New York, NY (United States); Columbia Univ., New York, NY (United States). Center for Climate Systems Research
- Publication Date:
- Research Org.:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1571490
- Report Number(s):
- PNNL-SA-142244
Journal ID: ISSN 0094-8276
- Grant/Contract Number:
- AC05-76RL01830
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Geophysical Research Letters
- Additional Journal Information:
- Journal Volume: 46; Journal Issue: 13; Journal ID: ISSN 0094-8276
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 54 ENVIRONMENTAL SCIENCES; moist entropy; moisture transport; moisture sources and sinks; water isotopes; water tags; Antarctica
Citation Formats
Bailey, Adriana, Singh, Hansi K. A., and Nusbaumer, Jesse. Evaluating a Moist Isentropic Framework for Poleward Moisture Transport: Implications for Water Isotopes Over Antarctica. United States: N. p., 2019.
Web. doi:10.1029/2019GL082965.
Bailey, Adriana, Singh, Hansi K. A., & Nusbaumer, Jesse. Evaluating a Moist Isentropic Framework for Poleward Moisture Transport: Implications for Water Isotopes Over Antarctica. United States. https://doi.org/10.1029/2019GL082965
Bailey, Adriana, Singh, Hansi K. A., and Nusbaumer, Jesse. Thu .
"Evaluating a Moist Isentropic Framework for Poleward Moisture Transport: Implications for Water Isotopes Over Antarctica". United States. https://doi.org/10.1029/2019GL082965. https://www.osti.gov/servlets/purl/1571490.
@article{osti_1571490,
title = {Evaluating a Moist Isentropic Framework for Poleward Moisture Transport: Implications for Water Isotopes Over Antarctica},
author = {Bailey, Adriana and Singh, Hansi K. A. and Nusbaumer, Jesse},
abstractNote = {The ability to identify moisture source regions and sinks, and to model the transport pathways that link them in simple yet physical ways, is critical for our understanding of climate today and in the past. Using water tagging and isotopic tracer experiments in the Community Earth System Model, combined with theoretical arguments, this work provides compelling evidence of the utility of a moist isentropic view of poleward moisture transport. Importantly, because conservation of moist entropy requires that air masses trade sensible and latent heat for potential energy, the moist isentropic framework provides strong energetic constraints on the atmosphere's effective rainout, which the isotope ratios of water vapor and precipitation record. The analysis confirms not only that distinct zonal bands supply moisture to high- and low-elevation polar sites, but also that changes in these source regions are inextricably linked to changes in temperature and rainout.},
doi = {10.1029/2019GL082965},
journal = {Geophysical Research Letters},
number = 13,
volume = 46,
place = {United States},
year = {Thu Jun 20 00:00:00 EDT 2019},
month = {Thu Jun 20 00:00:00 EDT 2019}
}
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Works referencing / citing this record:
Influence of sea-ice anomalies on Antarctic precipitation using source attribution in the Community Earth System Model
journal, January 2020
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