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Land-Atmosphere Interactions Over Ci...

Vo, Thuy Trang,

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Land-Atmosphere Interactions Over Cities: Urban Effects on Tree Canopy Temperature and Local Cloud Patterns /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Land-Atmosphere Interactions Over Cities: Urban Effects on Tree Canopy Temperature and Local Cloud Patterns // Thuy Trang Vo.
Author:	Vo, Thuy Trang,
Description:	1 electronic resource (231 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 86-06, Section: B.
Contained By:	Dissertations Abstracts International86-06B.
Subject:	Atmospheric sciences. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31564538
ISBN:	9798346763192

Land-Atmosphere Interactions Over Cities: Urban Effects on Tree Canopy Temperature and Local Cloud Patterns /
Vo, Thuy Trang,

Land-Atmosphere Interactions Over Cities: Urban Effects on Tree Canopy Temperature and Local Cloud Patterns /Thuy Trang Vo. - 1 electronic resource (231 pages)

Source: Dissertations Abstracts International, Volume: 86-06, Section: B.

Understanding land-atmosphere (L-A) interactions is critical for predicting Earth's system and its functionality. This dissertation advances knowledge in three aspects involving L-A interactions at different scales. The first study asks how city-wide tree canopy temperatures vary diurnally, and what environmental factors and to what extent they contribute to its spatiotemporal variation. Despite the importance of urban trees' surface temperature in assessing micro-climate interactions between trees and the surrounding environment, their diurnal evolution has been largely understudied at a city-wide scale. The research highlights the more important role of the greenspace coverage in controlling the daytime canopy temperature, while, surrounding buildings modulate canopy temperature asymmetrically diurnally: reduced daytime warming and reduced nocturnal cooling. The second study unveils how cities modify local cloud patterns and how regional climate and local urban properties influence the diurnal and seasonal changes of urban cloud patterns. Cloud is one of the critical components in regulating urban hydrometeorological cycles but remains less understood in urban-atmospheric systems. The research reveals that most cities experience enhanced cloudiness in the summertime diurnally, while, asymmetric diurnal effects in the wintertime. City size and stronger surface heating are primarily responsible for summer local cloud enhancement diurnally; while moisture and energy background control the urban cloud cover anomalies seasonally. The last study improves understanding of 40yr spatiotemporal dynamics of cloud pattern changes across CONUS and its sub-regions. There is a lack of long-term knowledge of spatial and temporal dynamics of cloud trends and variability at sub-regional scales due to a lack of effective cloud datasets. Cloud representation remains challenging in climate modeling. The cloud climatological analysis built on observation-validated advanced model simulations suggests that overall cloud frequency has been declining in the first three decades and slightly increased in the most recent decade at an average rate of −0.06%yr−1 across CONUS, and there is a more rapid changing rate over sunny regions. The long-term decreasing trends were found for all three cloud types (high, mid, and low clouds) across CONUS, but, their relative changes to total clouds are rather different. Improved understanding of such phenomena in L-A interactions extends our knowledge of the critical processes and helps to untangle the complex interactions in the climate system.

English

ISBN: 9798346763192Subjects--Topical Terms:

3168354
Atmospheric sciences.
Subjects--Index Terms:

Climatology

Land-Atmosphere Interactions Over Cities: Urban Effects on Tree Canopy Temperature and Local Cloud Patterns /
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502 $b Ph.D. $c The University of Alabama in Huntsville $d 2024.
520 $a Understanding land-atmosphere (L-A) interactions is critical for predicting Earth's system and its functionality. This dissertation advances knowledge in three aspects involving L-A interactions at different scales. The first study asks how city-wide tree canopy temperatures vary diurnally, and what environmental factors and to what extent they contribute to its spatiotemporal variation. Despite the importance of urban trees' surface temperature in assessing micro-climate interactions between trees and the surrounding environment, their diurnal evolution has been largely understudied at a city-wide scale. The research highlights the more important role of the greenspace coverage in controlling the daytime canopy temperature, while, surrounding buildings modulate canopy temperature asymmetrically diurnally: reduced daytime warming and reduced nocturnal cooling. The second study unveils how cities modify local cloud patterns and how regional climate and local urban properties influence the diurnal and seasonal changes of urban cloud patterns. Cloud is one of the critical components in regulating urban hydrometeorological cycles but remains less understood in urban-atmospheric systems. The research reveals that most cities experience enhanced cloudiness in the summertime diurnally, while, asymmetric diurnal effects in the wintertime. City size and stronger surface heating are primarily responsible for summer local cloud enhancement diurnally; while moisture and energy background control the urban cloud cover anomalies seasonally. The last study improves understanding of 40yr spatiotemporal dynamics of cloud pattern changes across CONUS and its sub-regions. There is a lack of long-term knowledge of spatial and temporal dynamics of cloud trends and variability at sub-regional scales due to a lack of effective cloud datasets. Cloud representation remains challenging in climate modeling. The cloud climatological analysis built on observation-validated advanced model simulations suggests that overall cloud frequency has been declining in the first three decades and slightly increased in the most recent decade at an average rate of −0.06%yr−1 across CONUS, and there is a more rapid changing rate over sunny regions. The long-term decreasing trends were found for all three cloud types (high, mid, and low clouds) across CONUS, but, their relative changes to total clouds are rather different. Improved understanding of such phenomena in L-A interactions extends our knowledge of the critical processes and helps to untangle the complex interactions in the climate system.
546 $a English
590 $a School code: 0278
650 4 $a Atmospheric sciences. $3 3168354
650 4 $a Urban forestry. $3 704817
650 4 $a Urban planning. $3 2122922
650 4 $a Geophysics. $3 535228
650 4 $a Climate change. $2 bicssc $3 2079509
653 $a Climatology
653 $a Clouds
653 $a Tree temperature
653 $a Urban heat island
653 $a Land-atmosphere interactions
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690 $a 0281
690 $a 0999
690 $a 0404
690 $a 0373
710 2 $a The University of Alabama in Huntsville. $b Atmospheric Science. $e degree granting institution. $3 3821041
720 1 $a Hu, Leiqiu $e degree supervisor.
773 0 $t Dissertations Abstracts International $g 86-06B.
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791 $a Ph.D.
792 $a 2024
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