| Item type |
紀要論文 / Departmental Bulletin Paper(1) |
| 公開日 |
2010-11-30 |
| タイトル |
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|
タイトル |
Drought/flood variations in eastern china during the colder (1610-1719) and warmer (1880-1989) periods and their relations with the southern oscillation |
| 言語 |
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|
言語 |
eng |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
drought/flood index |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
eastern China |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
colder and warmer periods |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
drought/flood variation |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
the Southern Oscillation |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
departmental bulletin paper |
| 著者 |
Bao, Zhenhao
Mikami, Takehiko
Masuda, Kooiti
|
| 著者(ヨミ) |
ミカミ, タケヒコ
マスダ, コウイチ
|
| 抄録 |
|
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内容記述タイプ |
Abstract |
|
内容記述 |
The drought/flood index in eastern China, with five drought/flood grades which are 1 (very wet), 2 (wet), 3 (normal), 4 (dry) and 5 (very dry), is used to explore and compare interannual and decadal drought/flood changes in 1610-1719 and 1880-1989. The period 1610-1719 is the coldest epoch during the Little Ice Age and the period 1880-1989 is a relatively warmer epoch in the recent 400 years. The annual rates of long-term tendency in 1610-1719 in the middle-upper reaches of the Yellow River, the down reaches of the Yangtze Valley and Huabei (the north part of eastern China) are -0.35%, -0.09% and -0.41% respectively. The annual rates of long-term tendency in 1880-1989 in the three regions are 0.24%, 0.42% and 0.49% respectively. The largest lagged-one auto-correlation for drought/flood index in 1610-1719 was found in the middle-upper reaches of the Yellow River. The interdecadal changes show that the strongest fluctuations can be detected around 1645 in eastern China during 1610-1719 and around 1895 in Huabei and the down reaches of the Yangtze Valley during 1880-1989. The interdecadal changes for drought/flood index in Huabei in the two periods better correspond to large-scale coldness/warmth variability. The Southern Oscillation Index (SOI) with the upper quartile (SOI-UQ) in summer and autumn (the latter half year) is closely associated with wet conditions in eastern China in 1904-1989, especially in Huabei. While the SOI-UQ occurred in the latter half year, their average drought/flood indices in the middle-upper reaches of the Yellow River, the down reaches of the Yangtze Valley and Huabei are 2.59, 2.73 and 2.31, respectively. The drought/flood variability in Huabei was correlated with seasonal sea level pressure (SLP) at Darwin in March-April-May (MAM). The drought/flood index in the down reaches of the Yangtze Valley is related to the SLP at Darwin in the following September-October-November (SON). |
| 書誌情報 |
Geographical Reports of Tokyo Metropolitan University
号 33,
p. 1-19,
発行日 1998
|
| ISSN |
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収録物識別子タイプ |
ISSN |
|
収録物識別子 |
03868710 |
| 書誌レコードID |
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収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA00200173 |
| 著者版フラグ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 出版者 |
|
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出版者 |
Department of Geography, Tokyo Metropolitan University |
20005-33-001.pdf (800.2 kB)
