Search

Your search keyword '"Sung, Mi Kyung"' showing total 567 results
Start Over Author "Sung, Mi Kyung"
567 results on '"Sung, Mi Kyung"'

15. Basin-dependent response of Northern Hemisphere winter blocking frequency to CO2 removal

Author

National Research Foundation of Korea, Korea Institute of Science and Technology, Japan Society for the Promotion of Science, Ministerio de Ciencia e Innovación (España), 0009-0009-2514-7109, 0000-0003-2982-9501, 0000-0002-2370-6765, 0000-0002-7659-6571, 0000-0001-6476-944X, 0000-0002-0003-429X, 0000-0003-4549-1686, 0000-0002-6749-010X, 0000-0003-2251-2579, 0000-0002-3199-7646, Hwang, Jaeyoung, Son, Seok Woo, Martineau, Patrick, Sung, Mi Kyung, Barriopedro, David, An, Soon Il, Yeh, Sang Wook, Min, Seung Ki, Kug, Jong Seong, Shin, Jongsoo, National Research Foundation of Korea, Korea Institute of Science and Technology, Japan Society for the Promotion of Science, Ministerio de Ciencia e Innovación (España), 0009-0009-2514-7109, 0000-0003-2982-9501, 0000-0002-2370-6765, 0000-0002-7659-6571, 0000-0001-6476-944X, 0000-0002-0003-429X, 0000-0003-4549-1686, 0000-0002-6749-010X, 0000-0003-2251-2579, 0000-0002-3199-7646, Hwang, Jaeyoung, Son, Seok Woo, Martineau, Patrick, Sung, Mi Kyung, Barriopedro, David, An, Soon Il, Yeh, Sang Wook, Min, Seung Ki, Kug, Jong Seong, and Shin, Jongsoo

Abstract

Atmospheric blocking has been identified as one of the key elements of the extratropical atmospheric variabilities, controlling extreme weather events in mid-latitudes. Future projections indicate that Northern Hemisphere winter blocking frequency may decrease as CO2 concentrations increase. Here, we show that such changes may not be reversed when CO2 concentrations return to the current levels. Blocking frequency instead exhibits basin-dependent changes in response to CO2 removal. While the North Atlantic blocking frequency recovers gradually from the CO2-induced eastward shift, the North Pacific blocking frequency under the CO2 removal remains lower than its initial state. These basin-dependent blocking frequency changes result from background flow changes and their interactions with high-frequency eddies. Both high-frequency eddy and background flow changes determine North Atlantic blocking changes, whereas high-frequency eddy changes dominate the slow recovery of North Pacific blocking. Our results indicate that blocking-related extreme events in the Northern Hemisphere winter may not monotonically respond to CO2 removal.

Published
2024

19. Basin-dependent response of Northern Hemisphere winter blocking frequency to CO2 removal.

Author

Hwang, Jaeyoung, Son, Seok-Woo, Martineau, Patrick, Sung, Mi-Kyung, Barriopedro, David, An, Soon-Il, Yeh, Sang-Wook, Min, Seung-Ki, Kug, Jong-Seong, and Shin, Jongsoo

Subjects
EXTREME weather, WEATHER control, EDDIES
Abstract

Atmospheric blocking has been identified as one of the key elements of the extratropical atmospheric variabilities, controlling extreme weather events in mid-latitudes. Future projections indicate that Northern Hemisphere winter blocking frequency may decrease as CO2 concentrations increase. Here, we show that such changes may not be reversed when CO2 concentrations return to the current levels. Blocking frequency instead exhibits basin-dependent changes in response to CO2 removal. While the North Atlantic blocking frequency recovers gradually from the CO2-induced eastward shift, the North Pacific blocking frequency under the CO2 removal remains lower than its initial state. These basin-dependent blocking frequency changes result from background flow changes and their interactions with high-frequency eddies. Both high-frequency eddy and background flow changes determine North Atlantic blocking changes, whereas high-frequency eddy changes dominate the slow recovery of North Pacific blocking. Our results indicate that blocking-related extreme events in the Northern Hemisphere winter may not monotonically respond to CO2 removal. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

20. Phase dependence of growth mechanisms in the daily energetics of the North Atlantic Oscillation.

Author

Kim, Minju, Sung, Mi‐Kyung, and Yoo, Changhyun

Subjects
*NORTH Atlantic oscillation, *ENERGY conversion, *KINETIC energy, *VERTICAL motion, *EDDY flux
Abstract

The North Atlantic Oscillation (NAO) is a dominant atmospheric variability in the Northern Hemisphere that has a substantial impact on weather and climate on various time scales. Here, we investigate the role of energy conversion terms day‐by‐day during the NAO life cycle. The relative timing and contribution of the energy conversion terms are quantified by projecting the terms onto the eddy total energy, eddy kinetic energy (EKE), and eddy available potential energy (EAPE) patterns associated with the NAO. The results show a remarkable phase dependence in the growth and maintenance mechanisms. For positive NAOs, the initial growth is driven by the barotropic interactions between the eddies propagating over North America. This suggests that a non‐local growth mechanism plays an important role in the initiation of positive NAOs. In contrast, it is the baroclinic processes that initiate negative NAOs. The conversion of the mean APE into the EAPE and then into the EKE, processes which include eddy heat fluxes and vertical motions, results in the relatively local growth of negative NAOs. During the mature phase, the largest source of energy is the conversion of the mean APE into EAPE. Part of this is converted to EKE, making a substantial contribution to the maintenance of the EKE. This process is particularly important for negative NAOs. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results