https://repository.kopri.re.kr/handle/201206/13382 2026-04-29T13:48:15Z 2026-04-29T13:48:15Z Kim, Seong-Joong https://repository.kopri.re.kr/handle/201206/14587 2023-08-17T06:53:55Z 2023-08-16T00:00:00Z

Title: Understanding of Antarctic climate and environment and assessments of global influence Authors: Kim, Seong-Joong

2023-08-16T00:00:00Z Lee, Ji-Yi https://repository.kopri.re.kr/handle/201206/14526 2023-08-17T01:53:49Z 2023-07-26T00:00:00Z

Title: A study on the carbon fraction and organic speciation of aerosol in the Antarctic atmosphere Authors: Lee, Ji-Yi

2023-07-26T00:00:00Z 김기애 최나래 유하영 Jang, Eunho Yoon, Young Jun Park, Jiyeon 정창훈 김용표 Park, Ki-Tae 이지이 https://repository.kopri.re.kr/handle/201206/14242 2023-01-09T16:37:10Z 2023-01-01T00:00:00Z

Title: Atmospheric saccharide composition and its possible linkage with marine phytoplankton from North Pacific to the Antarctic regions Authors: 김기애; 최나래; 유하영; Jang, Eunho; Yoon, Young Jun; Park, Jiyeon; 정창훈; 김용표; Park, Ki-Tae; 이지이 Abstract: Saccharide compounds can distinguish the influence of both biogenic emissions and anthropogenic sources. In this study, the spatial distribution of 10 saccharide compounds was observed to determine the major factor for the production of organic aerosols in the pristine marine regions from the North Pacific Ocean to the Antarctic Ocean. The pristine marine atmospheric PM2.5 (Particle matter with an aerodynamic diameter equal to or less than nominal 2.5 μm) samples were collected using a high-volume air sampler connected to a wind sector controller installed in the Korean Ice-breaking Research Vessel (IBRV) during the cruise through the Pacific Ocean: from the Yellow Sea, Korea on 31 October 2018 to the Antarctic Ocean on 14 December 2018. In the pristine marine region, the total saccharides concentrations varied greatly from 0.16 to 16.57 ng/m3 (mean: 3.02 ± 4.76 ng/m3). The compositions of 10 saccharide compounds in each PM2.5 sample changed when the marine geographic characteristics changed. The contribution of levoglucosan in the sample collected near land was higher than the sample collected in the open ocean. In addition, saccharides concentrations had a strong positive correlation with OC (Organic carbon), indicating that the increase of saccharides concentrations strongly contributes to the increase in OC concentration in the pristine marine region. The highest concentration of saccharides was observed near the New Zealand coast, which also showed highest air mass exposure to marine biology. We also found that the spatial distribution of saccharide composition was correlated with the spatial distribution of phytoplankton. From these observations, we concluded that 1) marine phytoplankton can be a significant source of organic aerosol production and 2) the type of phytoplankton in a region affects the change of saccharides composition in PM2.5.

2023-01-01T00:00:00Z Atiqah Azhar Sheeba Nettukandy Chenoli Azizan Abu Samah Kim, Seong-Joong Nuncio Murukesh https://repository.kopri.re.kr/handle/201206/14461 2023-05-31T16:37:06Z 2023-01-01T00:00:00Z

Title: The mechanism linking the variability of the Antarctic sea ice extent in the Indian Ocean sector to Indian summer monsoon rainfall Authors: Atiqah Azhar; Sheeba Nettukandy Chenoli; Azizan Abu Samah; Kim, Seong-Joong; Nuncio Murukesh Abstract: The study investigates the mechanism of teleconnection between the variability of sea ice extent (SIE) in the Indian Ocean sector of the Southern Ocean and the variability of Indian summer monsoon rainfall. We utilized reanalysis, satellite, in-situ observation data, and model output from the coupled model intercomparison project phase 5 (CMIP5) from 1979 to 2013. The reanalysis data revealed that the Indian Ocean sector SIE during April-May-June (AMJ) significantly correlated with the Indian summer monsoon rainfall over Peninsular India. Changes in the SIE in the Indian Ocean sector excite meridional wave train responses along the Indian Ocean. Anomalous meridional circulations contribute to the strengthening (weakening) of the Polar, Ferrel, and Hadley cells, inducing strong (weak) convective activity over the Indian latitudes during high (low) sea ice phases. The strong (weak) convective activity over the Indian region leads to more (less) rainfall over the Indian region, mainly western Peninsular India, during high (low) sea ice phase years. Furthermore, a stronger (weaker) polar jet during the high (low) sea ice phase is also noted. The selected CMIP5 models captured certain atmospheric teleconnection features found in the reanalysis. During AMJ, the SIE simulated by the NorESM1-M model significantly positively correlated with Indian summer monsoon rainfall, whereas the IPSL-CM54-LR model showed a negative correlation.

2023-01-01T00:00:00Z