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  • 1
    Online Resource
    Online Resource
    A 9-Year Comparison of Dementia Prevalence in Korea: Results of NaSDEK 2008 and 2017
    IOS Press ; 2021
    In:  Journal of Alzheimer's Disease Vol. 81, No. 2 ( 2021-05-18), p. 821-831
    Details
    In: Journal of Alzheimer's Disease, IOS Press, Vol. 81, No. 2 ( 2021-05-18), p. 821-831
    Abstract: Background: In many high-income Western countries, the prevalence of dementia had been reduced over the past decades. Objective: We investigated whether the prevalence of all-cause dementia, Alzheimer’s disease, vascular dementia, and mild cognitive impairment (MCI) had changed in Korea from 2008 to 2017. Methods: Nationwide Survey on Dementia Epidemiology of Korea (NaSDEK) in 2008 and 2017 was conducted on representative elderly populations that were randomly sampled across South Korea. Both surveys employed a two-stage design (screening and diagnostic phases) and diagnosed dementia and MCI according to the fourth edition of the Diagnostic and Statistical Manual of Mental Disorders and the consensus criteria from the International Working Group, respectively. The numbers of participants aged 65 years or older in the screening and diagnostic phases were 6,141 and 1,673 in the NaSDEK 2008 and 2,972 and 474 in the NaSDEK 2017, respectively. Results: The age- and sex-standardized prevalence of all-cause dementia and Alzheimer’s disease showed nonsignificant decrease (12.3% to 9.8%, odds ratio [OR] = 0.89, 95% confidence interval [CI] = 0.54–1.48 for all-cause dementia; 7.6% to 6.8%, OR [95% CI] = 0.91 [0.58–1.42] for Alzheimer’s disease). Vascular dementia decreased in the young-old population aged less than 75 years (2.7% to 0.001%, OR [95% CI] = 0.04 [0.01–0.15] ) and in women (1.9% to 0.5%, OR [95% CI] = 0.27 [0.10–0.72] ) while MCI remained stable (25.3% to 26.2%, OR [95% CI] = 1.08 [0.67–1.73] ). Conclusion: We found that the prevalence of dementia in Korea showed a nonsignificant decrease between 2008 and 2017.
    Type of Medium: Online Resource
    ISSN: 1387-2877 , 1875-8908
    URL: Article
    DOI: 10.3233/JAD-201588
    Language: Unknown
    Publisher: IOS Press
    Publication Date: 2021
    detail.hit.zdb_id: 2070772-1
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    Online Resource
  • 2
    Online Resource
    Online Resource
    The Impact of Arctic Winter Infrared Radiation on Early Summer Sea Ice
    American Meteorological Society ; 2015
    In:  Journal of Climate Vol. 28, No. 15 ( 2015-08-01), p. 6281-6296
    Details
    In: Journal of Climate, American Meteorological Society, Vol. 28, No. 15 ( 2015-08-01), p. 6281-6296
    Abstract: The Arctic summer sea ice area has been rapidly decreasing in recent decades. In addition to this trend, substantial interannual variability is present, as is highlighted by the recovery in sea ice area in 2013 following the record minimum in 2012. This interannual variability of the Arctic summer sea ice area has been attributed to the springtime weather disturbances. Here, by utilizing reanalysis- and satellite-based sea ice data, this study shows that summers with unusually small sea ice area are preceded by winters with anomalously strong downward longwave radiation over the Eurasian sector of the Arctic Ocean. This anomalous wintertime radiative forcing at the surface is up to 10–15 W m−2, which is about twice as strong than that during the spring. During the same winters, the poleward moisture and warm-air intrusions into the Eurasian sector of the Arctic Ocean are anomalously strong and the resulting moisture convergence field closely resembles positive anomalies in column-integrated water vapor and tropospheric temperature. Climate model simulations support the above-mentioned findings and further show that the anomalously strong wintertime radiative forcing can decrease sea ice thickness over wide areas of the Arctic Ocean, especially over the Eurasian sector. During the winters preceding the anomalously small summer sea ice area, the upper ocean of the model is anomalously warm over the Barents Sea, indicating that the upper-ocean heat content contributes to winter sea ice thinning. Finally, mass divergence by ice drift in the preceding winter and spring contributes to the thinning of sea ice over the East Siberian and Chukchi Seas, where radiative forcing and upper-ocean heat content anomalies are relatively weak.
    Type of Medium: Online Resource
    ISSN: 0894-8755 , 1520-0442
    URL: Article
    DOI: 10.1175/JCLI-D-14-00773.1
    RVK:
    UA 4548
    Language: English
    Publisher: American Meteorological Society
    Publication Date: 2015
    detail.hit.zdb_id: 246750-1
    detail.hit.zdb_id: 2021723-7
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    Online Resource
  • 3
    Online Resource
    Online Resource
    How Does Indian Monsoon Regulate the Northern Hemisphere Stationary Wave Pattern?
    Frontiers Media SA ; 2021
    In:  Frontiers in Earth Science Vol. 8 ( 2021-1-20)
    Details
    In: Frontiers in Earth Science, Frontiers Media SA, Vol. 8 ( 2021-1-20)
    Abstract: The Northern Hemisphere summer climate isstrongly affected by a circumglobal stationary Rossby wave train, which can be manifested by the first EOF mode of the geopotential height at 200 hPa. Interannual variation of this Northern Hemisphere wave (NHW) pattern has a significant impact on remarkably warm surface temperature anomalies over the North Atlantic, Northeast Europe, East Asia to Central-North Pacific, and America, particularly in 2018 and 2010. The NHW pattern is likely generated by atmospheric diabatic heating and vorticity forcing: diabatic heating is mainly confined in the Indian summer monsoon (ISM) precipitation region, whereas the anti-cyclonic vorticity forcing is distributed in the globe. The ISM is a well-known diabatic heat source; however, the main source of vorticity forcing has not been established. In general, the tropical vorticity anomaly comes from diabatic heating-induced atmospheric waves and randomly generated inherent internal waves. The linear baroclinic model experiment reveals that the NHW pattern can be generated by the westward propagating tropical waves generated by the ISM diabatic heat forcing.
    Type of Medium: Online Resource
    ISSN: 2296-6463
    URL: Article
    DOI: 10.3389/feart.2020.599745
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2021
    detail.hit.zdb_id: 2741235-0
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  • 4
    Online Resource
    Online Resource
    The Impact of Poleward Moisture and Sensible Heat Flux on Arctic Winter Sea Ice Variability*
    American Meteorological Society ; 2015
    In:  Journal of Climate Vol. 28, No. 13 ( 2015-07-01), p. 5030-5040
    Details
    In: Journal of Climate, American Meteorological Society, Vol. 28, No. 13 ( 2015-07-01), p. 5030-5040
    Abstract: The surface warming in recent decades has been most rapid in the Arctic, especially during the winter. Here, by utilizing global reanalysis and satellite datasets, it is shown that the northward flux of moisture into the Arctic during the winter strengthens the downward infrared radiation (IR) by 30–40 W m−2 over 1–2 weeks. This is followed by a decline of up to 10% in sea ice concentration over the Greenland, Barents, and Kara Seas. A climate model simulation indicates that the wind-induced sea ice drift leads the decline of sea ice thickness during the early stage of the strong downward IR events, but that within one week the cumulative downward IR effect appears to be dominant. Further analysis indicates that strong downward IR events are preceded several days earlier by enhanced convection over the tropical Indian and western Pacific Oceans. This finding suggests that sea ice predictions can benefit from an improved understanding of tropical convection and ensuing planetary wave dynamics.
    Type of Medium: Online Resource
    ISSN: 0894-8755 , 1520-0442
    URL: Article
    URL: Article
    DOI: 10.1175/JCLI-D-15-0074.1
    DOI: 10.1175/JCLI-D-15-0074.s1
    RVK:
    UA 4548
    Language: English
    Publisher: American Meteorological Society
    Publication Date: 2015
    detail.hit.zdb_id: 246750-1
    detail.hit.zdb_id: 2021723-7
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  • 5
    Online Resource
    Online Resource
    The Role of the Central Asian Mountains on the Midwinter Suppression of North Pacific Storminess
    American Meteorological Society ; 2010
    In:  Journal of the Atmospheric Sciences Vol. 67, No. 11 ( 2010-11-01), p. 3706-3720
    Details
    In: Journal of the Atmospheric Sciences, American Meteorological Society, Vol. 67, No. 11 ( 2010-11-01), p. 3706-3720
    Abstract: The role of the central Asian mountains on North Pacific storminess is examined using an atmospheric general circulation model by varying the height and the areas of the mountains. A series of model integrations show that the presence of the central Asian mountains suppresses the North Pacific storminess by 20%–30% during boreal winter. Their impact on storminess is found to be small during other seasons. The mountains amplify stationary waves and effectively weaken the high-frequency transient eddy kinetic energy in boreal winter. Two main causes of the reduced storminess are diagnosed. First, the decrease in storminess appears to be associated with a weakening of downstream eddy development. The mountains disorganize the zonal coherency of wave packets and refract them more equatorward. As the zonal traveling distance of wave packets gets substantially shorter, downstream eddy development gets weaker. Second, the central Asian mountains suppress the global baroclinic energy conversion. The decreased baroclinic energy conversion, particularly over the eastern Eurasian continent, decreases the number of eddy disturbances entering into the western North Pacific. The “barotropic governor” does not appear to explain the reduced storminess in our model simulations.
    Type of Medium: Online Resource
    ISSN: 1520-0469 , 0022-4928
    URL: Article
    DOI: 10.1175/2010JAS3349.1
    RVK:
    UA 4800
    Language: English
    Publisher: American Meteorological Society
    Publication Date: 2010
    detail.hit.zdb_id: 218351-1
    detail.hit.zdb_id: 2025890-2
    SSG: 16,13
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  • 6
    Online Resource
    Online Resource
    The Relationship Between the Zonal Index and Annular Mode Index in Reanalysis and CMIP5 Models
    Springer Science and Business Media LLC ; 2022
    In:  Asia-Pacific Journal of Atmospheric Sciences Vol. 58, No. 1 ( 2022-02), p. 117-126
    Details
    In: Asia-Pacific Journal of Atmospheric Sciences, Springer Science and Business Media LLC, Vol. 58, No. 1 ( 2022-02), p. 117-126
    Type of Medium: Online Resource
    ISSN: 1976-7633 , 1976-7951
    URL: Article
    DOI: 10.1007/s13143-021-00244-3
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2022
    detail.hit.zdb_id: 2545937-5
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    Online Resource
  • 7
    Online Resource
    Online Resource
    Evaluation of Deep-Learning-Based Very Short-Term Rainfall Forecasts in South Korea
    Springer Science and Business Media LLC ; 2023
    In:  Asia-Pacific Journal of Atmospheric Sciences Vol. 59, No. 2 ( 2023-05), p. 239-255
    Details
    In: Asia-Pacific Journal of Atmospheric Sciences, Springer Science and Business Media LLC, Vol. 59, No. 2 ( 2023-05), p. 239-255
    Type of Medium: Online Resource
    ISSN: 1976-7633 , 1976-7951
    URL: Article
    DOI: 10.1007/s13143-022-00310-4
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2023
    detail.hit.zdb_id: 2545937-5
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  • 8
    Online Resource
    Online Resource
    Effective training strategies for deep-learning-based precipitation nowcasting and estimation
    Elsevier BV ; 2022
    In:  Computers & Geosciences Vol. 161 ( 2022-04), p. 105072-
    Details
    In: Computers & Geosciences, Elsevier BV, Vol. 161 ( 2022-04), p. 105072-
    Type of Medium: Online Resource
    ISSN: 0098-3004
    URL: Article
    DOI: 10.1016/j.cageo.2022.105072
    RVK:
    RA 1000
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2022
    detail.hit.zdb_id: 1499977-8
    SSG: 16,13
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  • 9
    Online Resource
    Online Resource
    Long‐term change of summer mean and extreme precipitations in Korea and East Asia
    Wiley ; 2023
    In:  International Journal of Climatology Vol. 43, No. 7 ( 2023-06-15), p. 3476-3492
    Details
    In: International Journal of Climatology, Wiley, Vol. 43, No. 7 ( 2023-06-15), p. 3476-3492
    Abstract: The change of the precipitation characteristics over South Korea is investigated using long‐term (60 years) hourly precipitation records from surface stations focusing on extended summer (June–September) and rainy season (Changma). The precipitation characteristics including extreme events ( 〉 30 mm·h −1 or 〉 100 mm·day −1 ) are also compared for the past (1961–1990) and recent (1991–2020) climatology. The amount of summer precipitation shows a notable increase over South Korea (2.6 mm·day −1 ·century −1 ) during the last 60 years (1961–2020) although it is smaller than recent 48‐year trend measured in North Korea (9.7 mm·day −1 ·century −1 ). Precipitation amounts are significantly increased than past climatology particularly in 70–100 and 200 mm·day −1 intensity ranges. The frequency of extreme precipitation also exhibits an increasing trend (1.0 frequency·century −1 ) during the last 60 years over South Korea. The frequency of extreme precipitation has been doubled in the recent climatology compared to the past climatology. Daily precipitations in top 1 percentile present clear increasing trends during the extended summer and Changma season in South Korea. Further investigation using gridded precipitation reveals that the similar mean and extreme precipitation increases are observed over the wider regions in East Asia, including central China and southern Japan. This result implies that the long‐term precipitation change over South Korea is related to a large‐scale circulation change in the East Asian summer monsoon.
    Type of Medium: Online Resource
    ISSN: 0899-8418 , 1097-0088
    URL: Issue
    URL: Article
    DOI: 10.1002/joc.v43.7
    DOI: 10.1002/joc.8039
    RVK:
    RA 1000
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 1491204-1
    SSG: 14
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  • 10
    Online Resource
    Online Resource
    A Deep‐Learning Ensemble Method to Detect Atmospheric Rivers and Its Application to Projected Changes in Precipitation Regime
    American Geophysical Union (AGU) ; 2023
    In:  Journal of Geophysical Research: Atmospheres Vol. 128, No. 12 ( 2023-06-27)
    Details
    In: Journal of Geophysical Research: Atmospheres, American Geophysical Union (AGU), Vol. 128, No. 12 ( 2023-06-27)
    Abstract: An ensemble method with multiple deep‐learning algorithms is established to detect atmospheric rivers (ARs) The ensemble method outperforms individual deep‐learning algorithms in AR detection The increase in AR‐related precipitation largely determines the future increase in heavy and extremely heavy precipitation in midlatitudes
    Type of Medium: Online Resource
    ISSN: 2169-897X , 2169-8996
    URL: Article
    DOI: 10.1029/2022JD037041
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2023
    detail.hit.zdb_id: 710256-2
    detail.hit.zdb_id: 2016800-7
    detail.hit.zdb_id: 2969341-X
    SSG: 16,13
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