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Impacts of Cloud Microphysics on Ext...

Charn, Alexander B.

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Impacts of Cloud Microphysics on Extreme Precipitation and Lightning.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Impacts of Cloud Microphysics on Extreme Precipitation and Lightning./
Author:	Charn, Alexander B.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
Description:	100 p.
Notes:	Source: Dissertations Abstracts International, Volume: 82-05, Section: B.
Contained By:	Dissertations Abstracts International82-05B.
Subject:	Atmospheric sciences. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28090498
ISBN:	9798691237393

Impacts of Cloud Microphysics on Extreme Precipitation and Lightning.
Charn, Alexander B.

Impacts of Cloud Microphysics on Extreme Precipitation and Lightning. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 100 p.

Source: Dissertations Abstracts International, Volume: 82-05, Section: B.

Thesis (Ph.D.)--University of California, Berkeley, 2020.

This item must not be sold to any third party vendors.

The microphysical processes involving water droplets and ice crystals in clouds are too small to be explicitly simulated by climate and weather models. Nevertheless, they play a critical role in the large-scale energy balance of the Earth and its atmosphere, as well as smaller-scale phenomena such as storms. This dissertation examines the impact of microphysics on the latter, specifically extreme precipitation and lightning. Climate change threatens to exacerbate such events, making the understanding of such extremes crucial.We focus primarily on the effects of microphysical processes as they are simulated in a superparameterized climate model, which is better suited to studying clouds and the associated extreme weather events than conventional models. We find statistically significant differences in extreme precipitation rates via two separate mechanisms when replacing one commonly used microphysics parameterization with another. We also find that the sign of changes in lightning flash rates with global warming depends on the microphysics representation used. Finally, we employ observations to address a longstanding question about the necessity of ice as a precursor of lightning. With the data available it is concluded that there is insufficient evidence to suggest that thunderstorm electrification can occur in the absence of ice.

ISBN: 9798691237393Subjects--Topical Terms:

3168354
Atmospheric sciences.
Subjects--Index Terms:

Lightning

Impacts of Cloud Microphysics on Extreme Precipitation and Lightning.
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245 1 0 $a Impacts of Cloud Microphysics on Extreme Precipitation and Lightning.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2020
300 $a 100 p.
500 $a Source: Dissertations Abstracts International, Volume: 82-05, Section: B.
500 $a Advisor: Collins, William D.
502 $a Thesis (Ph.D.)--University of California, Berkeley, 2020.
506 $a This item must not be sold to any third party vendors.
520 $a The microphysical processes involving water droplets and ice crystals in clouds are too small to be explicitly simulated by climate and weather models. Nevertheless, they play a critical role in the large-scale energy balance of the Earth and its atmosphere, as well as smaller-scale phenomena such as storms. This dissertation examines the impact of microphysics on the latter, specifically extreme precipitation and lightning. Climate change threatens to exacerbate such events, making the understanding of such extremes crucial.We focus primarily on the effects of microphysical processes as they are simulated in a superparameterized climate model, which is better suited to studying clouds and the associated extreme weather events than conventional models. We find statistically significant differences in extreme precipitation rates via two separate mechanisms when replacing one commonly used microphysics parameterization with another. We also find that the sign of changes in lightning flash rates with global warming depends on the microphysics representation used. Finally, we employ observations to address a longstanding question about the necessity of ice as a precursor of lightning. With the data available it is concluded that there is insufficient evidence to suggest that thunderstorm electrification can occur in the absence of ice.
590 $a School code: 0028.
650 4 $a Atmospheric sciences. $3 3168354
650 4 $a Climate change. $2 bicssc $3 2079509
650 4 $a Meteorology. $3 542822
653 $a Lightning
653 $a Microphysics
653 $a Precipitation
653 $a Clouds
690 $a 0725
690 $a 0404
690 $a 0557
710 2 $a University of California, Berkeley. $b Earth & Planetary Science. $3 1035733
773 0 $t Dissertations Abstracts International $g 82-05B.
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791 $a Ph.D.
792 $a 2020
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28090498