Interactions Between Tropical Cyclones and the Midlatitude Waveguide: Downstream Impacts and the Role of Convective Processes
Significant amplification to the waveguide can occur when a recurving tropical cyclone (TC) interacts with the midlatitude flow, leading to significant downstream impacts. To this point in time, TC-midlatitude waveguide interactions have been conceptualized as primarily being driven by large-scale p...
Main Author: | |
---|---|
Format: | Text |
Language: | unknown |
Published: |
UWM Digital Commons
2022
|
Subjects: | |
Online Access: | https://dc.uwm.edu/etd/3063 https://dc.uwm.edu/context/etd/article/4068/viewcontent/Prince_uwm_0263D_13313.pdf |
id |
ftunivwisconmil:oai:dc.uwm.edu:etd-4068 |
---|---|
record_format |
openpolar |
spelling |
ftunivwisconmil:oai:dc.uwm.edu:etd-4068 2023-07-02T03:33:08+02:00 Interactions Between Tropical Cyclones and the Midlatitude Waveguide: Downstream Impacts and the Role of Convective Processes Prince, Kevin 2022-07-01T07:00:00Z application/pdf https://dc.uwm.edu/etd/3063 https://dc.uwm.edu/context/etd/article/4068/viewcontent/Prince_uwm_0263D_13313.pdf unknown UWM Digital Commons https://dc.uwm.edu/etd/3063 https://dc.uwm.edu/context/etd/article/4068/viewcontent/Prince_uwm_0263D_13313.pdf Theses and Dissertations Convection Cyclone Tropical Waveguide Atmospheric Sciences text 2022 ftunivwisconmil 2023-06-13T18:32:41Z Significant amplification to the waveguide can occur when a recurving tropical cyclone (TC) interacts with the midlatitude flow, leading to significant downstream impacts. To this point in time, TC-midlatitude waveguide interactions have been conceptualized as primarily being driven by large-scale processes, with convective-scale contributions having been parameterized or neglected. This three-part study diagnoses the impact TC-midlatitude waveguide interactions have on the intensity evolution of downstream TCs and the role convective-scale processes play in TC-midlatitude waveguide interactions. Recurving TCs in both the North Atlantic and western North Pacific basins frequently interact favorably with upstream troughs, where a favorable interaction entails the tightening of a pre-existing potential vorticity (PV) gradient on the eastern flank of the trough, leading to subsequent downstream flow amplification in the vicinity of a downstream TC. In the Atlantic, weakening downstream TCs are closer to the midlatitude waveguide on the southeastern edge of the amplified midlatitude ridge, whereas strengthening downstream TCs are further from the waveguide and equatorward of the amplified midlatitude ridge. Conversely, western North Pacific strengthening and weakening secondary TCs are primarily stratified by latitude, with weakening secondary TCs located poleward of their strengthening secondary TC counterparts. Convective-scale processes are shown to potentially play a role in determining the strength and downstream evolution of TC-midlatitude waveguide interactions. This importance of convective-scale processes on the large-scales is accomplished by way of an inverse energy cascade supported by the filamentation of intensely negative PV generated by deep, moist convection. These negative PV anomalies are generated by intense horizonal gradients of diabatic warming and exist primarily in the middle- to upper-troposphere. While preliminary sensitivity simulations suggest that convective-scale processes in ... Text North Atlantic University of Wisconsin-Milwaukee: UWM Digital Commons Pacific |
institution |
Open Polar |
collection |
University of Wisconsin-Milwaukee: UWM Digital Commons |
op_collection_id |
ftunivwisconmil |
language |
unknown |
topic |
Convection Cyclone Tropical Waveguide Atmospheric Sciences |
spellingShingle |
Convection Cyclone Tropical Waveguide Atmospheric Sciences Prince, Kevin Interactions Between Tropical Cyclones and the Midlatitude Waveguide: Downstream Impacts and the Role of Convective Processes |
topic_facet |
Convection Cyclone Tropical Waveguide Atmospheric Sciences |
description |
Significant amplification to the waveguide can occur when a recurving tropical cyclone (TC) interacts with the midlatitude flow, leading to significant downstream impacts. To this point in time, TC-midlatitude waveguide interactions have been conceptualized as primarily being driven by large-scale processes, with convective-scale contributions having been parameterized or neglected. This three-part study diagnoses the impact TC-midlatitude waveguide interactions have on the intensity evolution of downstream TCs and the role convective-scale processes play in TC-midlatitude waveguide interactions. Recurving TCs in both the North Atlantic and western North Pacific basins frequently interact favorably with upstream troughs, where a favorable interaction entails the tightening of a pre-existing potential vorticity (PV) gradient on the eastern flank of the trough, leading to subsequent downstream flow amplification in the vicinity of a downstream TC. In the Atlantic, weakening downstream TCs are closer to the midlatitude waveguide on the southeastern edge of the amplified midlatitude ridge, whereas strengthening downstream TCs are further from the waveguide and equatorward of the amplified midlatitude ridge. Conversely, western North Pacific strengthening and weakening secondary TCs are primarily stratified by latitude, with weakening secondary TCs located poleward of their strengthening secondary TC counterparts. Convective-scale processes are shown to potentially play a role in determining the strength and downstream evolution of TC-midlatitude waveguide interactions. This importance of convective-scale processes on the large-scales is accomplished by way of an inverse energy cascade supported by the filamentation of intensely negative PV generated by deep, moist convection. These negative PV anomalies are generated by intense horizonal gradients of diabatic warming and exist primarily in the middle- to upper-troposphere. While preliminary sensitivity simulations suggest that convective-scale processes in ... |
format |
Text |
author |
Prince, Kevin |
author_facet |
Prince, Kevin |
author_sort |
Prince, Kevin |
title |
Interactions Between Tropical Cyclones and the Midlatitude Waveguide: Downstream Impacts and the Role of Convective Processes |
title_short |
Interactions Between Tropical Cyclones and the Midlatitude Waveguide: Downstream Impacts and the Role of Convective Processes |
title_full |
Interactions Between Tropical Cyclones and the Midlatitude Waveguide: Downstream Impacts and the Role of Convective Processes |
title_fullStr |
Interactions Between Tropical Cyclones and the Midlatitude Waveguide: Downstream Impacts and the Role of Convective Processes |
title_full_unstemmed |
Interactions Between Tropical Cyclones and the Midlatitude Waveguide: Downstream Impacts and the Role of Convective Processes |
title_sort |
interactions between tropical cyclones and the midlatitude waveguide: downstream impacts and the role of convective processes |
publisher |
UWM Digital Commons |
publishDate |
2022 |
url |
https://dc.uwm.edu/etd/3063 https://dc.uwm.edu/context/etd/article/4068/viewcontent/Prince_uwm_0263D_13313.pdf |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Theses and Dissertations |
op_relation |
https://dc.uwm.edu/etd/3063 https://dc.uwm.edu/context/etd/article/4068/viewcontent/Prince_uwm_0263D_13313.pdf |
_version_ |
1770272968597831680 |