Revisiting the Diurnal Pulses of Tropical Cyclones Over the Northwest Pacific Ocean
Abstract This study investigates the characteristics and mechanisms of diurnal pulses (DPs) in tropical cyclones (TCs) over the Northwest Pacific. Previous studies have noted discontinuities in DP propagation with respect to radius, but lacked an explanation for this phenomenon. Our findings reveal...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2025-07-01
|
| Series: | Geophysical Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2025GL116554 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849245741365592064 |
|---|---|
| author | Jinjing Zhang Yu Du |
| author_facet | Jinjing Zhang Yu Du |
| author_sort | Jinjing Zhang |
| collection | DOAJ |
| description | Abstract This study investigates the characteristics and mechanisms of diurnal pulses (DPs) in tropical cyclones (TCs) over the Northwest Pacific. Previous studies have noted discontinuities in DP propagation with respect to radius, but lacked an explanation for this phenomenon. Our findings reveal that this discontinuity results from the superposition of an outward‐propagating mode driven by inertial‐gravity waves and quasi‐phase‐locked signals associated with the diurnal variations in the TC secondary circulation. DP occurrence exhibits strong latitude dependence. DPs occur more frequently within 0°–30°N latitude, likely driven by inertial‐gravity waves originating from the TC inner core at the tropopause. North of 30°N, DP propagation is primarily influenced by the TC outflow winds, with the DP propagation speed strongly correlated to outflow strength. Additionally, DPs share similarities in characteristics and mechanisms with the offshore propagation of coastal rainfall, both governed by inertial‐gravity waves in lower latitudes and by wind advection at higher latitudes. |
| format | Article |
| id | doaj-art-3efd2f14b2cb401398a6e1fafbdef2d3 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-3efd2f14b2cb401398a6e1fafbdef2d32025-08-20T03:58:44ZengWileyGeophysical Research Letters0094-82761944-80072025-07-015214n/an/a10.1029/2025GL116554Revisiting the Diurnal Pulses of Tropical Cyclones Over the Northwest Pacific OceanJinjing Zhang0Yu Du1School of Atmospheric Sciences Sun Yat‐sen University, and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) Zhuhai ChinaSchool of Atmospheric Sciences Sun Yat‐sen University, and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) Zhuhai ChinaAbstract This study investigates the characteristics and mechanisms of diurnal pulses (DPs) in tropical cyclones (TCs) over the Northwest Pacific. Previous studies have noted discontinuities in DP propagation with respect to radius, but lacked an explanation for this phenomenon. Our findings reveal that this discontinuity results from the superposition of an outward‐propagating mode driven by inertial‐gravity waves and quasi‐phase‐locked signals associated with the diurnal variations in the TC secondary circulation. DP occurrence exhibits strong latitude dependence. DPs occur more frequently within 0°–30°N latitude, likely driven by inertial‐gravity waves originating from the TC inner core at the tropopause. North of 30°N, DP propagation is primarily influenced by the TC outflow winds, with the DP propagation speed strongly correlated to outflow strength. Additionally, DPs share similarities in characteristics and mechanisms with the offshore propagation of coastal rainfall, both governed by inertial‐gravity waves in lower latitudes and by wind advection at higher latitudes.https://doi.org/10.1029/2025GL116554diurnal pulsetropical cycloneinertial‐gravity wavediurnal cycleoffshore propagation |
| spellingShingle | Jinjing Zhang Yu Du Revisiting the Diurnal Pulses of Tropical Cyclones Over the Northwest Pacific Ocean Geophysical Research Letters diurnal pulse tropical cyclone inertial‐gravity wave diurnal cycle offshore propagation |
| title | Revisiting the Diurnal Pulses of Tropical Cyclones Over the Northwest Pacific Ocean |
| title_full | Revisiting the Diurnal Pulses of Tropical Cyclones Over the Northwest Pacific Ocean |
| title_fullStr | Revisiting the Diurnal Pulses of Tropical Cyclones Over the Northwest Pacific Ocean |
| title_full_unstemmed | Revisiting the Diurnal Pulses of Tropical Cyclones Over the Northwest Pacific Ocean |
| title_short | Revisiting the Diurnal Pulses of Tropical Cyclones Over the Northwest Pacific Ocean |
| title_sort | revisiting the diurnal pulses of tropical cyclones over the northwest pacific ocean |
| topic | diurnal pulse tropical cyclone inertial‐gravity wave diurnal cycle offshore propagation |
| url | https://doi.org/10.1029/2025GL116554 |
| work_keys_str_mv | AT jinjingzhang revisitingthediurnalpulsesoftropicalcyclonesoverthenorthwestpacificocean AT yudu revisitingthediurnalpulsesoftropicalcyclonesoverthenorthwestpacificocean |