The Isotopic Composition of Precipitation from Two Extratropical Cyclones

Gedzelman, Stanley David; Lawrence, J. R.

doi:10.1175/1520-0493(1990)118<0495:ticopf>2.0.co;2

Cited by 61 publications

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“…Stable water isotope ratios in our samples for Hurricane Sandy were much more depleted than the typical frontal and convective precipitation events that we sampled. Similar differences have been previously reported for large extratropical systems (Gedzelman & Lawrence, ) and were explained by their long lifetime and large size of the clouds. A study by Good, Mallia, Lin, and Bowen (), which focused on assessing variations in rainwater stable isotopes during Hurricane Sandy over northeastern United States, included a dataset on isotopic composition in precipitation from State College (PA, USA), which is located 20 km from our sampling site.…”

Section: Resultssupporting

confidence: 90%

Variability of dissolved organic carbon in precipitation during storms at the Shale Hills Critical Zone Observatory

Iavorivska

Boyer

Grimm

et al. 2017

Hydrological Processes

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Organic compounds are removed from the atmosphere and deposited to the Earth's surface via precipitation. In this study, we quantified variations of dissolved organic carbon (DOC) in precipitation during storm events at the Shale Hills Critical Zone Observatory, a forested watershed in central Pennsylvania (USA). Precipitation samples were collected consecutively throughout the storm during 13 events, which spanned a range of seasons and synoptic meteorological conditions, including a hurricane. Further, we explored factors that affect the temporal variability by considering relationships of DOC in precipitation with atmospheric and storm characteristics. Concentrations and chemical composition of DOC changed considerably during storms, with the magnitude of change within individual events being comparable or higher than the range of variation in average event composition among events. Although some previous studies observed that concentrations of other elements in precipitation typically decrease over the course of individual storm events, results of this study show that DOC concentrations in precipitation are highly variable. During most storm events, concentrations decreased over time, possibly as a result of washing out of the below‐cloud atmosphere. However, increasing concentrations that were observed in the later stages of some storm events highlight that DOC removal with precipitation is not merely a dilution response. Increases in DOC during events could result from advection of air masses, local emissions during breaks in precipitation, or chemical transformations in the atmosphere that enhance solubility of organic carbon compounds. This work advances understanding of processes occurring during storms that are relevant to studies of atmospheric chemistry, carbon cycling, and ecosystem responses.

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Section: Resultssupporting

confidence: 90%

Variability of dissolved organic carbon in precipitation during storms at the Shale Hills Critical Zone Observatory

Iavorivska

Boyer

Grimm

et al. 2017

Hydrological Processes

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“…Finally, diffusive exchange of isotopes causes rain to scavenge heavy isotopes from the ambient vapor [Miyake et al, 1968], thereby reducing isotope ratios both in and downwind from regions of organized precipitation [Gedzelman and Lawrence, 1990].…”

Section: Principles Of Stable Isotope Meteorologymentioning

confidence: 99%

Stable isotopic composition of water vapor in the tropics

et al. 2004

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“…Gedzelman and Lawrence (1990) (in the following referred to as GL90) collected the precipitation at more than 20 stations (see Fig. 1) between 06:00 UTC 18 January 1986 and 06:00 UTC 21 January 1986 with mostly three-hourly, at some stations six-hourly time resolution.…”

Section: Introductionmentioning

confidence: 99%

The isotopic composition of precipitation from a winter storm – a case study with the limited-area model COSMO<sub>iso</sub>

2012

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Abstract. Stable water isotopes are valuable tracers of the atmospheric water cycle, and potentially provide useful information also on weather-related processes. In order to further explore this potential, the water isotopes H 18 2 O and HDO are incorporated into the limited-area model COSMO. In a first case study, the new COSMO iso model is used for simulating a winter storm event in January 1986 over the eastern United States associated with intense frontal precipitation. The modelled isotope ratios in precipitation and water vapour are compared to spatially distributed δ 18 O observations. COSMO iso very accurately reproduces the statistical distribution of δ 18 O in precipitation, and also the synopticscale spatial pattern and temporal evolution agree well with the measurements. Perpendicular to the front that triggers most of the rainfall during the event, the model simulates a gradient in the isotopic composition of the precipitation, with high δ 18 O values in the warm air and lower values in the cold sector behind the front. This spatial pattern is created through an interplay of large scale air mass advection, removal of heavy isotopes by precipitation at the front and microphysical interactions between rain drops and water vapour beneath the cloud base. This investigation illustrates the usefulness of high resolution, event-based model simulations for understanding the complex processes that cause synoptic-scale variability of the isotopic composition of atmospheric waters. In future research, this will be particularly beneficial in combination with laser spectrometric isotope observations with high temporal resolution.

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The Isotopic Composition of Precipitation from Two Extratropical Cyclones

Cited by 61 publications

References 0 publications

Variability of dissolved organic carbon in precipitation during storms at the Shale Hills Critical Zone Observatory

Variability of dissolved organic carbon in precipitation during storms at the Shale Hills Critical Zone Observatory

Stable isotopic composition of water vapor in the tropics

The isotopic composition of precipitation from a winter storm – a case study with the limited-area model COSMO<sub>iso</sub>

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The Isotopic Composition of Precipitation from Two Extratropical Cyclones

Cited by 61 publications

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Variability of dissolved organic carbon in precipitation during storms at the Shale Hills Critical Zone Observatory

Variability of dissolved organic carbon in precipitation during storms at the Shale Hills Critical Zone Observatory

Stable isotopic composition of water vapor in the tropics

The isotopic composition of precipitation from a winter storm – a case study with the limited-area model COSMO&lt;sub&gt;iso&lt;/sub&gt;

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The isotopic composition of precipitation from a winter storm – a case study with the limited-area model COSMO<sub>iso</sub>