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Rivers as Sources of Freshwater Ice-...

Knackstedt, Kathryn.

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Rivers as Sources of Freshwater Ice-Nucleating Particles.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Rivers as Sources of Freshwater Ice-Nucleating Particles./
Author:	Knackstedt, Kathryn.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
Description:	61 p.
Notes:	Source: Masters Abstracts International, Volume: 56-06.
Contained By:	Masters Abstracts International56-06(E).
Subject:	Aquatic sciences. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10645262
ISBN:	9780355184266

Rivers as Sources of Freshwater Ice-Nucleating Particles.
Knackstedt, Kathryn.

Rivers as Sources of Freshwater Ice-Nucleating Particles. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 61 p.

Source: Masters Abstracts International, Volume: 56-06.

Thesis (M.S.)--Bowling Green State University, 2017.

Ice nucleating particles (INP) are a neglected, but integral component of the water cycle. Preliminary evidence is presented showing that rivers possess high numbers of warm temperature biological INP and that these may become airborne. Whereas recent efforts characterizing marine INPs are beginning to inform circulation models to predict weather patterns, the contribution of freshwater INPs to the water cycle has been largely overlooked. Evidence is presented showing that rivers possess high numbers of warm temperature (≥-10 °C) INP whose abundance may be several orders of magnitude higher than marine sources. Focusing on the Maumee River, situated in a predominantly agricultural watershed and which serves as the largest tributary to Lake Erie, a seasonal analysis of surface water INP revealed a strong positive relationship between INP abundance and river discharge with INP abundance varying by three orders of magnitude between low river discharge in summer and early fall and high discharge in winter and spring. Assessing the potential of INP to become aerosolized, INP abundance was consistently higher in air sampled near engineered features promoting turbulence compared to controls located away from direct influence of the river. The analysis also indicates that the vast majority of the INP in river surface waters are subcellular and so not attributable to known INP classes. Apart from seasonally-resolved surveys of the Maumee River, a small focused study was conducted at the University of Michigan Biological Station (UMBS) Stream Research Facility. This served as a way to engineer different turbulent river features on a smaller scale to determine aerosolization of warm temperature INP. Combined with recent surveys of other major US rivers, there is growing consensus that the presence of abundant warm temperature INP is a common, if not ubiquitous feature of fresh water systems.

ISBN: 9780355184266Subjects--Topical Terms:

3174300
Aquatic sciences.

Rivers as Sources of Freshwater Ice-Nucleating Particles.
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