| Autor: |
Good SP; Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, United States of America., Mallia DV; Department of Atmospheric Sciences, University of Utah, Salt Lake City, Utah, United States of America., Lin JC; Department of Atmospheric Sciences, University of Utah, Salt Lake City, Utah, United States of America., Bowen GJ; Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, United States of America. |
| Jazyk: |
angličtina |
| Zdroj: |
PloS one [PLoS One] 2014 Mar 11; Vol. 9 (3), pp. e91117. Date of Electronic Publication: 2014 Mar 11 (Print Publication: 2014). |
| DOI: |
10.1371/journal.pone.0091117 |
| Abstrakt: |
Extra-tropical cyclones, such as 2012 Superstorm Sandy, pose a significant climatic threat to the northeastern United Sates, yet prediction of hydrologic and thermodynamic processes within such systems is complicated by their interaction with mid-latitude water patterns as they move poleward. Fortunately, the evolution of these systems is also recorded in the stable isotope ratios of storm-associated precipitation and water vapor, and isotopic analysis provides constraints on difficult-to-observe cyclone dynamics. During Superstorm Sandy, a unique crowdsourced approach enabled 685 precipitation samples to be obtained for oxygen and hydrogen isotopic analysis, constituting the largest isotopic sampling of a synoptic-scale system to date. Isotopically, these waters span an enormous range of values (> 21‰ for δ(18)O, > 160‰ for δ(2)H) and exhibit strong spatiotemporal structure. Low isotope ratios occurred predominantly in the west and south quadrants of the storm, indicating robust isotopic distillation that tracked the intensity of the storm's warm core. Elevated values of deuterium-excess (> 25‰) were found primarily in the New England region after Sandy made landfall. Isotope mass balance calculations and Lagrangian back-trajectory analysis suggest that these samples reflect the moistening of dry continental air entrained from a mid-latitude trough. These results demonstrate the power of rapid-response isotope monitoring to elucidate the structure and dynamics of water cycling within synoptic-scale systems and improve our understanding of storm evolution, hydroclimatological impacts, and paleo-storm proxies. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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