Meso-scale photospheric convection during chromospheric fan-shaped surge on light bridge
Abstract Recently, intermittent and aperiodic fan-shaped chromospheric surges have attracted significant attention, though their related photospheric dynamic signals remain unclear. This study examines seven such surges and their potential photospheric signals along a light bridge (LB) in NOAA AR 12...
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Springer
2025-04-01
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| Series: | Discover Applied Sciences |
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| Online Access: | https://doi.org/10.1007/s42452-025-06873-x |
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| author | Yuzong Zhang Jun Zhang Wenda Cao Shuhong Yang Yunfei Yang Jiangtao Su Reizaburo Kitai Xinjie Mao Ding Yuan Xin Huang Xiaoshuai Zhu Chunlan Jin Suo Liu Qiao Song Baolin Tan Kaifan Ji |
| author_facet | Yuzong Zhang Jun Zhang Wenda Cao Shuhong Yang Yunfei Yang Jiangtao Su Reizaburo Kitai Xinjie Mao Ding Yuan Xin Huang Xiaoshuai Zhu Chunlan Jin Suo Liu Qiao Song Baolin Tan Kaifan Ji |
| author_sort | Yuzong Zhang |
| collection | DOAJ |
| description | Abstract Recently, intermittent and aperiodic fan-shaped chromospheric surges have attracted significant attention, though their related photospheric dynamic signals remain unclear. This study examines seven such surges and their potential photospheric signals along a light bridge (LB) in NOAA AR 12371 over a period of 100 min using BBSO/GST observations. Each surge displays as dark, jet-like structures with nearly uniform amplitudes, aligned closely along the LB to form a long smooth upper edge. Simultaneously, the photospheric LB exhibits dynamic grains, including bright points and granules. Adjacent grains brighten, expand, and merge into a ‘grain group’ (GG), which span LB’s cross-section. As GG moves along the LB, its leading edge develops an arched structure. During GG formation, the local horizontal magnetic field direction undergoes significant deflection. Within the 100-min interval, 10 GGs were recorded, occurring intermittently and aperiodically. Notably, three photospheric GG-free intervals corresponded to three chromospheric surge-free intervals, with a temporal delay (80–712 s) between GG reappearance and surge recurrence. Our findings suggest that meso-scale photospheric GGs, larger than individual granules but smaller than the full extent of the LB, are closely related to chromospheric surges. A conceptual model integrating inverse turbulent cascades and flux tube interactions is proposed, unifying multi-scale energy transfer from photospheric convection to chromospheric reconnection. |
| format | Article |
| id | doaj-art-710fd22ea6b74f8fb806e40f85d6ccc7 |
| institution | OA Journals |
| issn | 3004-9261 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Springer |
| record_format | Article |
| series | Discover Applied Sciences |
| spelling | doaj-art-710fd22ea6b74f8fb806e40f85d6ccc72025-08-20T02:30:27ZengSpringerDiscover Applied Sciences3004-92612025-04-017511710.1007/s42452-025-06873-xMeso-scale photospheric convection during chromospheric fan-shaped surge on light bridgeYuzong Zhang0Jun Zhang1Wenda Cao2Shuhong Yang3Yunfei Yang4Jiangtao Su5Reizaburo Kitai6Xinjie Mao7Ding Yuan8Xin Huang9Xiaoshuai Zhu10Chunlan Jin11Suo Liu12Qiao Song13Baolin Tan14Kaifan Ji15National Astronomical Observatories, Chinese Academy of SciencesSchool of Astronomy and Space Science, Chinese Academy of SciencesBig Bear Solar Observatory, New Jersey Institute of TechnologyNational Astronomical Observatories, Chinese Academy of SciencesFaculty of Information Engineering and Automation, Kunming University of Science and TechnologyNational Astronomical Observatories, Chinese Academy of SciencesRitsumeikan UniversityDepartment of Astronomy, Beijing Normal UniversityState Key Laboratory of Solar Activity and Space Weather, National Space Science CenterState Key Laboratory of Solar Activity and Space Weather, National Space Science CenterState Key Laboratory of Solar Activity and Space Weather, National Space Science CenterNational Astronomical Observatories, Chinese Academy of SciencesNational Astronomical Observatories, Chinese Academy of SciencesKey Laboratory of Space Weather, China Meteorological AdministrationNational Astronomical Observatories, Chinese Academy of SciencesYunnan ObservatoriesAbstract Recently, intermittent and aperiodic fan-shaped chromospheric surges have attracted significant attention, though their related photospheric dynamic signals remain unclear. This study examines seven such surges and their potential photospheric signals along a light bridge (LB) in NOAA AR 12371 over a period of 100 min using BBSO/GST observations. Each surge displays as dark, jet-like structures with nearly uniform amplitudes, aligned closely along the LB to form a long smooth upper edge. Simultaneously, the photospheric LB exhibits dynamic grains, including bright points and granules. Adjacent grains brighten, expand, and merge into a ‘grain group’ (GG), which span LB’s cross-section. As GG moves along the LB, its leading edge develops an arched structure. During GG formation, the local horizontal magnetic field direction undergoes significant deflection. Within the 100-min interval, 10 GGs were recorded, occurring intermittently and aperiodically. Notably, three photospheric GG-free intervals corresponded to three chromospheric surge-free intervals, with a temporal delay (80–712 s) between GG reappearance and surge recurrence. Our findings suggest that meso-scale photospheric GGs, larger than individual granules but smaller than the full extent of the LB, are closely related to chromospheric surges. A conceptual model integrating inverse turbulent cascades and flux tube interactions is proposed, unifying multi-scale energy transfer from photospheric convection to chromospheric reconnection.https://doi.org/10.1007/s42452-025-06873-xPhotosphereChromosphereSunspotLight bridgeGrainDynamics |
| spellingShingle | Yuzong Zhang Jun Zhang Wenda Cao Shuhong Yang Yunfei Yang Jiangtao Su Reizaburo Kitai Xinjie Mao Ding Yuan Xin Huang Xiaoshuai Zhu Chunlan Jin Suo Liu Qiao Song Baolin Tan Kaifan Ji Meso-scale photospheric convection during chromospheric fan-shaped surge on light bridge Discover Applied Sciences Photosphere Chromosphere Sunspot Light bridge Grain Dynamics |
| title | Meso-scale photospheric convection during chromospheric fan-shaped surge on light bridge |
| title_full | Meso-scale photospheric convection during chromospheric fan-shaped surge on light bridge |
| title_fullStr | Meso-scale photospheric convection during chromospheric fan-shaped surge on light bridge |
| title_full_unstemmed | Meso-scale photospheric convection during chromospheric fan-shaped surge on light bridge |
| title_short | Meso-scale photospheric convection during chromospheric fan-shaped surge on light bridge |
| title_sort | meso scale photospheric convection during chromospheric fan shaped surge on light bridge |
| topic | Photosphere Chromosphere Sunspot Light bridge Grain Dynamics |
| url | https://doi.org/10.1007/s42452-025-06873-x |
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