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Volumn 31, Issue 4, 2008, Pages 463-476

Characteristics of anomalous precipitation events over eastern China during the past five centuries

Author keywords

Anomalous precipitation events; Drought; Eastern China; Flood; Spatial pattern

Indexed keywords

ANTHROPOGENIC EFFECT; CLIMATE CHANGE; CLIMATE FORCING; DROUGHT; FLOOD; PRECIPITATION (CLIMATOLOGY); VOLCANIC ERUPTION;

EID: 47349121100     PISSN: 09307575     EISSN: 14320894     Source Type: Journal    
DOI: 10.1007/s00382-007-0323-0     Document Type: Conference Paper
Times cited : (57)

References (58)
  • 1
    • 0344011979 scopus 로고    scopus 로고
    • Proxy evidence for an El nino-like response to volcanic forcing
    • Adams JB, Mann ME, Ammann CM (2003) Proxy evidence for an El nino-like response to volcanic forcing. Nature 426:274-278
    • (2003) Nature , vol.426 , pp. 274-278
    • Adams, J.B.1    Mann, M.E.2    Ammann, C.M.3
  • 2
    • 47349103526 scopus 로고    scopus 로고
    • Reconstructing the East Asian monsoon response to major volcanic eruptions: A test of model skill with instrumental and paleoclimate data
    • PhD dissertation, University of Massachusetts
    • Bradbury JA (2006) Reconstructing the East Asian monsoon response to major volcanic eruptions: A test of model skill with instrumental and paleoclimate data. PhD dissertation, University of Massachusetts, p 254
    • (2006) , pp. 254
    • Bradbury, J.A.1
  • 3
    • 0032482418 scopus 로고    scopus 로고
    • Influence of volcanic eruptions on northern hemisphere summer temperature over the past 600 years
    • Briffa KR, Jones PD, Schweingruber FH, Osborn TJ (1998) Influence of volcanic eruptions on northern hemisphere summer temperature over the past 600 years. Nature 393:450-455
    • (1998) Nature , vol.393 , pp. 450-455
    • Briffa, K.R.1    Jones, P.D.2    Schweingruber, F.H.3    Osborn, T.J.4
  • 4
    • 0034670341 scopus 로고    scopus 로고
    • Interanual and interdecadal variation of the East Asian summer monsoon rainfall and tropical SSTs: Part 1, roles of the subtropical ridge
    • Chang CP, Zhang Y, Li T (2000) Interanual and interdecadal variation of the East Asian summer monsoon rainfall and tropical SSTs: Part 1, roles of the subtropical ridge. J Climatol 13:4310-4325
    • (2000) J Climatol , vol.13 , pp. 4310-4325
    • Chang, C.P.1    Zhang, Y.2    Li, T.3
  • 5
    • 0034829497 scopus 로고    scopus 로고
    • Losses caused by weather and climate extremes: A national index for the United States
    • Changnon SA, Changnon JM, Hewings GD (2001) Losses caused by weather and climate extremes: A national index for the United States. Physical Geogr 22:1-27
    • (2001) Physical Geogr , vol.22 , pp. 1-27
    • Changnon, S.A.1    Changnon, J.M.2    Hewings, G.D.3
  • 6
    • 0141572313 scopus 로고    scopus 로고
    • The use of geographical information systems in climatology and meteorology
    • Chapman L, Thornes JE (2003) The use of geographical information systems in climatology and meteorology. Progr Phys Geogr 27:313-330
    • (2003) Progr Phys Geogr , vol.27 , pp. 313-330
    • Chapman, L.1    Thornes, J.E.2
  • 7
    • 0013340341 scopus 로고
    • Yearly charts of dryness/wetness in China for the last 500-year period
    • CNMA (Chinese National Meteorological Administration) Chinese Cartographic Publishing House, Beijing
    • CNMA (Chinese National Meteorological Administration) (1981) Yearly charts of dryness/wetness in China for the last 500-year period, Chinese Cartographic Publishing House, Beijing
    • (1981)
  • 8
    • 85040956496 scopus 로고
    • Monsoons over China
    • Kluwer Academic Publishers, Dordrecht
    • Ding Y (1991) Monsoons over China. Kluwer Academic Publishers, Dordrecht, p 419
    • (1991) , pp. 419
    • Ding, Y.1
  • 10
    • 4744362040 scopus 로고    scopus 로고
    • Can human induced land-cover change modify the monsoon system?
    • In: Steffan W, Jager J, Carson WJ, Bradshaw C (eds) Springer, Berlin
    • Fu C (2002) Can human induced land-cover change modify the monsoon system? In: Steffan W, Jager J, Carson WJ, Bradshaw C (eds) Challenges of a changing earth. Springer, Berlin, pp 133-136
    • (2002) Challenges of a Changing Earth , pp. 133-136
    • Fu, C.1
  • 11
    • 0038170376 scopus 로고    scopus 로고
    • Impacts of human-induced land cover change on East Asia monsoon
    • Fu C (2003) Impacts of human-induced land cover change on East Asia monsoon. Glob Planet Change 37:219-229
    • (2003) Glob Planet Change , vol.37 , pp. 219-229
    • Fu, C.1
  • 12
    • 0142135341 scopus 로고    scopus 로고
    • Winter half-year temperature reconstruction for the middle and lower reaches of the Yellow River and Yangtze River, China, during the past 2000 years
    • Ge Q, Zheng J, Fang X, Man Z, Zhang X, Zhang P, Wang WC (2003) Winter half-year temperature reconstruction for the middle and lower reaches of the Yellow River and Yangtze River, China, during the past 2000 years. Holocene 13:933-940
    • (2003) Holocene , vol.13 , pp. 933-940
    • Ge, Q.1    Zheng, J.2    Fang, X.3    Man, Z.4    Zhang, X.5    Zhang, P.6    Wang, W.C.7
  • 13
    • 0034634183 scopus 로고    scopus 로고
    • Severe summer rainfall in China associated with enhanced global warming
    • Gong D, Wang S (2000a) Severe summer rainfall in China associated with enhanced global warming. Clim Res 16:51-59
    • (2000) Clim Res , vol.16 , pp. 51-59
    • Gong, D.1    Wang, S.2
  • 14
    • 0004083998 scopus 로고
    • Tree-ring reconstructions of climate and fire history at El Malpais National Monument, New Mexico
    • Dissertation. University of Arizona, Tucson, Arizona, USA
    • Grissino-Mayer H (1995) Tree-ring reconstructions of climate and fire history at El Malpais National Monument, New Mexico. Dissertation. University of Arizona, Tucson, Arizona, USA
    • (1995)
    • Grissino-Mayer, H.1
  • 15
    • 0040494726 scopus 로고
    • The variations of summer monsoon in East Asia and the rainfall over China
    • Guo Q (1985) The variations of summer monsoon in East Asia and the rainfall over China. J Tropical Meteor 1:44-52
    • (1985) J Tropical Meteor , vol.1 , pp. 44-52
    • Guo, Q.1
  • 16
    • 47349132596 scopus 로고
    • In: Ding Y (ed) Asian monsoon, China Meteorology Press, Beijing
    • Guo Q (1994) Monsoon and droughts/floods in China. In: Ding Y (ed) Asian monsoon, China Meteorology Press, Beijing, pp 65-75
    • (1994) Monsoon and Droughts/floods in China , pp. 65-75
    • Guo, Q.1
  • 17
    • 47349130004 scopus 로고    scopus 로고
    • In: Shi Y, Zhang P (eds) Historical climate change in China, Shandong Science and Technology Press, Jinan
    • Guo Q, Sha W (1996) Relationship between precipitation and temperature changes. In: Shi Y, Zhang P (eds) Historical climate change in China, Shandong Science and Technology Press, Jinan, pp 464-467
    • (1996) Relationship Between Precipitation and Temperature Changes , pp. 464-467
    • Guo, Q.1    Sha, W.2
  • 18
    • 0004827339 scopus 로고    scopus 로고
    • Monitoring drought using the standardized precipitation index
    • In: Wilhite DA (ed) A global assessment, Routledge, London
    • Hayes M, Svoboda M, Wilhite DA (2000) Monitoring drought using the standardized precipitation index. In: Wilhite DA (ed) Drought, vol I, A global assessment, Routledge, London, pp 168-180
    • (2000) Drought , vol.1 , pp. 168-180
    • Hayes, M.1    Svoboda, M.2    Wilhite, D.A.3
  • 19
    • 23044434101 scopus 로고    scopus 로고
    • Connection of summer rainfall variations in South and East Asia: Role of El nino/southern oscillation
    • Hu Z, Wu R, Kinter J, Yang S (2005) Connection of summer rainfall variations in South and East Asia: Role of El nino/southern oscillation. Int J Climatol 25:1279-1289
    • (2005) Int J Climatol , vol.25 , pp. 1279-1289
    • Hu, Z.1    Wu, R.2    Kinter, J.3    Yang, S.4
  • 20
    • 0142199359 scopus 로고    scopus 로고
    • The progresses of recent studies on the variability of the East Asian monsoon and their causes
    • Huang R, Zhou L, Chen W (2003) The progresses of recent studies on the variability of the East Asian monsoon and their causes. Adv Atmos Sci 20:55-69
    • (2003) Adv Atmos Sci , vol.20 , pp. 55-69
    • Huang, R.1    Zhou, L.2    Chen, W.3
  • 21
    • 36248976698 scopus 로고    scopus 로고
    • Workshop report of Intergovernmental panel on climate change
    • IPCC Workshop on changes in extreme weather and climate events, Beijing
    • IPCC (2002) Workshop report of Intergovernmental panel on climate change. Workshop on changes in extreme weather and climate events, Beijing, p 107
    • (2002) , pp. 107
  • 22
    • 4444301308 scopus 로고    scopus 로고
    • Climate over past millennia
    • Jones PD, Mann ME (2004) Climate over past millennia. Rev Geophys 42:1-42
    • (2004) Rev Geophys , vol.42 , pp. 1-42
    • Jones, P.D.1    Mann, M.E.2
  • 23
    • 27744581742 scopus 로고    scopus 로고
    • Features of cross-Pacific climate shown in the variability of China and US precipitation
    • Li Q, Yang S, Kousky VE, Higgins RW, Lau KM, Xie P (2005) Features of cross-Pacific climate shown in the variability of China and US precipitation. Int J Climatol 25:1675-1696
    • (2005) Int J Climatol , vol.25 , pp. 1675-1696
    • Li, Q.1    Yang, S.2    Kousky, V.E.3    Higgins, R.W.4    Lau, K.M.5    Xie, P.6
  • 24
    • 0347935708 scopus 로고    scopus 로고
    • Ability of NCAR RegCM2 in producing the dominant physical processes during anomalous rainfall episodes in the summer of 1991 over the Yangtze-Haihe Valley
    • Luo Y, Zhao Z, Ding Y (2002) Ability of NCAR RegCM2 in producing the dominant physical processes during anomalous rainfall episodes in the summer of 1991 over the Yangtze-Haihe Valley. Adv Atmos Sci. 19:200-208
    • (2002) Adv Atmos Sci. , vol.19 , pp. 200-208
    • Luo, Y.1    Zhao, Z.2    Ding, Y.3
  • 25
    • 0036275275 scopus 로고    scopus 로고
    • The Pacific decadal oscillation
    • Mantua NJ, Hare SR (2002) The Pacific decadal oscillation. J Oceanogr 58:35-44
    • (2002) J Oceanogr , vol.58 , pp. 35-44
    • Mantua, N.J.1    Hare, S.R.2
  • 26
    • 0037183904 scopus 로고    scopus 로고
    • Climate effects of black carbon aerosols in China and India
    • Menon S, Hansen J, Nazarenko L, Luo Y (2002) Climate effects of black carbon aerosols in China and India. Science 297:2250-2253
    • (2002) Science , vol.297 , pp. 2250-2253
    • Menon, S.1    Hansen, J.2    Nazarenko, L.3    Luo, Y.4
  • 27
    • 27744509902 scopus 로고    scopus 로고
    • Regional trends in recent precipitation indices in China
    • Qian W, Lin X (2005) Regional trends in recent precipitation indices in China. Meteorol Atmos Phys 90:193-207
    • (2005) Meteorol Atmos Phys , vol.90 , pp. 193-207
    • Qian, W.1    Lin, X.2
  • 28
    • 0041941191 scopus 로고    scopus 로고
    • Centennial-scale dry-wet variation in East Asia
    • Qian W, Hu Q, Zhu Y, Lee DK (2003a) Centennial-scale dry-wet variation in East Asia. Clim Dyn 21:77-89
    • (2003) Clim Dyn , vol.21 , pp. 77-89
    • Qian, W.1    Hu, Q.2    Zhu, Y.3    Lee, D.K.4
  • 29
    • 0348226013 scopus 로고    scopus 로고
    • Temporal and spatial variability of dryness/wetness in China during the last 530 years
    • Qian W, Chen D, Zhu Y, Shen H (2003b) Temporal and spatial variability of dryness/wetness in China during the last 530 years. Theor Appl Climatol 76:13-29
    • (2003) Theor. Appl Climatol , vol.76 , pp. 13-29
    • Qian, W.1    Chen, D.2    Zhu, Y.3    Shen, H.4
  • 30
    • 0038383009 scopus 로고    scopus 로고
    • Responses of China's summer monsoon climate to snow anomaly over the Tibetan Plateau
    • Qian Y, Zheng Y, Zhang Y, Miao M (2003c) Responses of China's summer monsoon climate to snow anomaly over the Tibetan Plateau. Int J Climatol 23:593-613
    • (2003) Int J Climatol , vol.23 , pp. 593-613
    • Qian, Y.1    Zheng, Y.2    Zhang, Y.3    Miao, M.4
  • 31
    • 0034887785 scopus 로고    scopus 로고
    • Climate change in China from 1880 to 1998 and its impact on the environmental condition
    • Qian W, Zhu Y (2001) Climate change in China from 1880 to 1998 and its impact on the environmental condition. Clim Change 50:419-444
    • (2001) Clim Change , vol.50 , pp. 419-444
    • Qian, W.1    Zhu, Y.2
  • 32
    • 0028315166 scopus 로고
    • The volcanic signal in Goddard Institute for Space Studies three-dimensional model simulations
    • Robock A, Liu Y (1994) The volcanic signal in Goddard Institute for Space Studies three-dimensional model simulations. J Climatol 7:44-55
    • (1994) J Climatol , vol.7 , pp. 44-55
    • Robock, A.1    Liu, Y.2
  • 33
    • 1642562705 scopus 로고    scopus 로고
    • Land surface conditions over Eurasia and Indian summer monsoon rainfall
    • doi: 10.1029/2002JD002286
    • Robock A, Mu M, Vinnikov K, Robinson D (2003) Land surface conditions over Eurasia and Indian summer monsoon rainfall. J Geophys Res 108(D4):4131. doi: 10.1029/2002JD002286
    • (2003) J Geophys Res , vol.108 , Issue.D4 , pp. 4131
    • Robock, A.1    Mu, M.2    Vinnikov, K.3    Robinson, D.4
  • 34
    • 0023510513 scopus 로고
    • Climate patterns derived from Chinese proxy precipitation records: An evaluation of the station networks and statistical techniques
    • Ronberg B, Wang WC (1987) Climate patterns derived from Chinese proxy precipitation records: An evaluation of the station networks and statistical techniques. J Climatol 7:391-416
    • (1987) J Climatol , vol.7 , pp. 391-416
    • Ronberg, B.1    Wang, W.C.2
  • 35
    • 0033052173 scopus 로고    scopus 로고
    • The monsoon rainband over China and relationships with the Eurasian circulation
    • Samel AN, Wang WC, Liang XZ (1999) The monsoon rainband over China and relationships with the Eurasian circulation. J Climatol 12:115-131
    • (1999) J Climatol , vol.12 , pp. 115-131
    • Samel, A.N.1    Wang, W.C.2    Liang, X.Z.3
  • 36
    • 0003147133 scopus 로고    scopus 로고
    • Decadal climate variations in Guliya ice core and a comparison with historical records over eastern China during the last 2,000 years
    • Shi Y, Yao T, Yang B (1999) Decadal climate variations in Guliya ice core and a comparison with historical records over eastern China during the last 2,000 years. Sci Chin D 29(suppl):79-86
    • (1999) Sci Chin D , vol.29 , Issue.SUPPL. , pp. 79-86
    • Shi, Y.1    Yao, T.2    Yang, B.3
  • 37
    • 0033884086 scopus 로고    scopus 로고
    • Changes in dryness/wetness in China during the last 529 years
    • Song J (2000) Changes in dryness/wetness in China during the last 529 years. Int J Climatol 20:1003-1015
    • (2000) Int J Climatol , vol.20 , pp. 1003-1015
    • Song, J.1
  • 38
    • 0031872202 scopus 로고    scopus 로고
    • Change trends of extreme climate events in China
    • Sun A, Liu X, Gao B (1998) Change trends of extreme climate events in China. Acta Meteor Sin 12:129-141
    • (1998) Acta Meteor Sin , vol.12 , pp. 129-141
    • Sun, A.1    Liu, X.2    Gao, B.3
  • 40
    • 36248963232 scopus 로고    scopus 로고
    • The study of major droughts in China during the past 500 years
    • Tan X (2003) The study of major droughts in China during the past 500 years. J Disaster Prev Mitigation Eng 23:77-83
    • (2003) J Disaster Prev Mitigation Eng , vol.23 , pp. 77-83
    • Tan, X.1
  • 41
    • 0019645301 scopus 로고
    • Droughts and floods in China, 1470-1979
    • In: Wigley TML, Ingram MJ, Farmer G (eds) Cambridge University Press, Cambridge
    • Wang S, Zhao Z (1981) Droughts and floods in China, 1470-1979. In: Wigley TML, Ingram MJ, Farmer G (eds) Climate and history. Cambridge University Press, Cambridge, pp 271-288
    • (1981) Climate and History , pp. 271-288
    • Wang, S.1    Zhao, Z.2
  • 42
    • 0034044074 scopus 로고    scopus 로고
    • Pacific-East Asian teleconnection: How does ENSO affect East Asian climate?
    • Wang B, Wu R, Fu X (2000a) Pacific-East Asian teleconnection: How does ENSO affect East Asian climate? J Climatol 13:1517-1536
    • (2000) J Climatol , vol.13 , pp. 1517-1536
    • Wang, B.1    Wu, R.2    Fu, X.3
  • 43
    • 1542369464 scopus 로고    scopus 로고
    • Predictability of drought in China
    • In: Wilhite DA (ed) A global assessment. Routledge, London
    • Wang S, Ye J, Qian W (2000b) Predictability of drought in China. In: Wilhite DA (ed) Drought, vol I. A global assessment. Routledge, London, pp 100-112
    • (2000) Drought , vol.1 , pp. 100-112
    • Wang, S.1    Ye, J.2    Qian, W.3
  • 44
    • 0042346359 scopus 로고    scopus 로고
    • The relation between the Tibetan winter snow and the Asian summer monsoon and rainfall: An observational investigation
    • Wu T, Qian Z (2003) The relation between the Tibetan winter snow and the Asian summer monsoon and rainfall: An observational investigation. J Climatol 16:2038-2051
    • (2003) J Climatol , vol.16 , pp. 2038-2051
    • Wu, T.1    Qian, Z.2
  • 45
    • 17144421228 scopus 로고    scopus 로고
    • Observational relationships between summer and winter monsoons over East Asia, part II: Results
    • Wu MC, Chan JCL (2005) Observational relationships between summer and winter monsoons over East Asia, part II: Results. Int J Climatol 25:453-468
    • (2005) Int J Climatol , vol.25 , pp. 453-468
    • Wu, M.C.1    Chan, J.C.L.2
  • 46
    • 32544454648 scopus 로고    scopus 로고
    • Moisture conditions and climate trends in China during the period 1971-2000
    • Wu S, Yin Y, Zheng D, Yang Q (2006) Moisture conditions and climate trends in China during the period 1971-2000. Int J Climatol 26:193-206
    • (2006) Int J Climatol , vol.26 , pp. 193-206
    • Wu, S.1    Yin, Y.2    Zheng, D.3    Yang, Q.4
  • 47
    • 0034854957 scopus 로고    scopus 로고
    • Abrupt change of the mid-summer climate in central east China by the influence of atmospheric pollution
    • Xu Q (2001) Abrupt change of the mid-summer climate in central east China by the influence of atmospheric pollution. Atmos Environ 35:5029-5040
    • (2001) Atmos Environ , vol.35 , pp. 5029-5040
    • Xu, Q.1
  • 48
    • 0026472423 scopus 로고
    • Climatic jumps in the flood/drought historical chronology of central China
    • Yan Z, Ye D, Wang C (1992) Climatic jumps in the flood/drought historical chronology of central China. Clim Dyn 6:153-160
    • (1992) Clim Dyn , vol.6 , pp. 153-160
    • Yan, Z.1    Ye, D.2    Wang, C.3
  • 49
    • 9744260335 scopus 로고    scopus 로고
    • Trend and variability of China precipitation in spring and summer: Linkage to sea-surface temperatures
    • Yang F, Lau KM (2004) Trend and variability of China precipitation in spring and summer: Linkage to sea-surface temperatures. Int J Climatol 24:1625-1644
    • (2004) Int J Climatol , vol.24 , pp. 1625-1644
    • Yang, F.1    Lau, K.M.2
  • 51
    • 17744364686 scopus 로고    scopus 로고
    • Trends in total precipitation and frequency of daily precipitation extremes over China
    • Zhai PM, Zhang X, Wan H, Pan X (2005) Trends in total precipitation and frequency of daily precipitation extremes over China. J Climatol 18:1096-1108
    • (2005) J Climatol , vol.18 , pp. 1096-1108
    • Zhai, P.M.1    Zhang, X.2    Wan, H.3    Pan, X.4
  • 52
    • 0013367685 scopus 로고
    • The method for reconstruction of the dryness/wetness series in China for the last 500 years and its reliability
    • In: Zhang J (ed) Science, Beijing
    • Zhang D (1988) The method for reconstruction of the dryness/wetness series in China for the last 500 years and its reliability. In: Zhang J (ed) The reconstruction of climate in china for historical times. Science, Beijing, pp 18-31
    • (1988) The Reconstruction of Climate in China for Historical Times , pp. 18-31
    • Zhang, D.1
  • 53
    • 0001204339 scopus 로고
    • Historical climate records in China and reconstruction of past climates (1470-1970)
    • Zhang J, Crowley TJ (1989) Historical climate records in China and reconstruction of past climates (1470-1970). J Climatol 2:833-849
    • (1989) J Climatol , vol.2 , pp. 833-849
    • Zhang, J.1    Crowley, T.J.2
  • 54
    • 47349083818 scopus 로고
    • The relation between large volcanic eruption in the world and the drought/flood in summer in China
    • Zhang F, Zhang X (1994) The relation between large volcanic eruption in the world and the drought/flood in summer in China. J Nat Disasters 3:40-46
    • (1994) J Nat Disasters , vol.3 , pp. 40-46
    • Zhang, F.1    Zhang, X.2
  • 55
    • 33645613813 scopus 로고    scopus 로고
    • Supplement of yearly charts of dryness/wetness in China for the last 500-year period, 1993-2000
    • Zhang D, Li X, Liang Y (2003) Supplement of yearly charts of dryness/ wetness in China for the last 500-year period, 1993-2000. J Appl Meteor Sci 14:379-389
    • (2003) J Appl Meteor Sci , vol.14 , pp. 379-389
    • Zhang, D.1    Li, X.2    Liang, Y.3
  • 56
    • 4043064160 scopus 로고    scopus 로고
    • Decadal change of the spring snow depth over the Tibetan Plateau: The associated circulation and influence on the East Asian summer monsoon
    • Zhang YS, Li T, Wang B (2004) Decadal change of the spring snow depth over the Tibetan Plateau: The associated circulation and influence on the East Asian summer monsoon. J Climatol 17:2780-2793
    • (2004) J Climatol , vol.17 , pp. 2780-2793
    • Zhang, Y.S.1    Li, T.2    Wang, B.3
  • 57
    • 0022823150 scopus 로고
    • Historical evidence of climate instability above normal in cool period in China
    • Zheng S, Feng L (1986) Historical evidence of climate instability above normal in cool period in China. Sci Sin B29:441-448
    • (1986) Sci Sin , vol.B29 , pp. 441-448
    • Zheng, S.1    Feng, L.2
  • 58
    • 0009802943 scopus 로고    scopus 로고
    • 80a-oscillation of summer rainfall over the east part of China and East Asia monsoon
    • Zhu W, Wang S (2001) 80a-oscillation of summer rainfall over the east part of China and East Asia monsoon. Adv Atmos Sci 18:1043-1051
    • (2001) Adv Atmos Sci , vol.18 , pp. 1043-1051
    • Zhu, W.1    Wang, S.2


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