Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.yqres.2008.12.001 |
The effect of climate change on the mobility and stability of coastal sand dunes in Ceara State (NE Brazil) | |
Tsoar, Haim1; Levin, Noam2; Porat, Naomi3; Maia, Luis P.4; Herrmann, Hans.5; Tatumi, Sonia H.6; Claudino-Sales, Vanda7 | |
通讯作者 | Tsoar, Haim |
来源期刊 | QUATERNARY RESEARCH
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ISSN | 0033-5894 |
出版年 | 2009 |
卷号 | 71期号:2页码:217-226 |
英文摘要 | The coast of Ceara State in NE Brazil is covered by vast fields of active and stabilized coastal sand dunes. Its tropical climate is characterized by two seasons, wet and dry, with wind intensity determined by the meridional shift of the Intertropical Convergence Zone. The wind power is negatively correlated with precipitation, and precipitation is negatively correlated with the difference between sea surface temperatures of the tropical Atlantic north and south of the equator. We present a model suggesting that during the Late Pleistocene wind power determined the mobility and stability of the dunes. Sand dunes accumulated during periods of high wind power (as it is today) and stabilized when wind power was low. Once the dunes were stabilized by vegetation they Could not be activated even by increased wind power. Samples that were taken for luminescence dating from 25 stabilized dunes along the coasts of Ceara gave ages ranging from 135 ka to < 100 yr. We postulate that these luminescence ages fall at the beginning of wet periods in NE Brazil characterized by low wind power. These paleoclimatic wet periods correlate well with the cold periods of stades in Greenland ice-core records. (c) 2008 University of Washington. All rights reserved. |
英文关键词 | Coastal sand dunes Mobility Stability Climate change NE Brazil |
类型 | Article |
语种 | 英语 |
国家 | Israel ; Brazil ; Switzerland |
收录类别 | SCI-E |
WOS记录号 | WOS:000263883500013 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; NORTHEASTERN BRAZIL ; TROPICAL ATLANTIC ; AUSTRALIA ; DESERT ; MIGRATION ; EVENTS ; SINGLE ; QUARTZ ; TIME |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Physical Geography ; Geology |
来源机构 | Ben-Gurion University of the Negev ; Hebrew University of Jerusalem |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/162372 |
作者单位 | 1.Ben Gurion Univ Negev, Dept Geog & Environm Dev, IL-84105 Beer Sheva, Israel; 2.Hebrew Univ Jerusalem, Dept Geog, IL-91905 Jerusalem, Israel; 3.Geol Survey Israel, IL-95301 Jerusalem, Israel; 4.Inst Ciencias Mar, LABOMAR, Fortaleza, Ceara, Brazil; 5.ETH Honggerberg, Inst Baustoffe IfB, Swiss Fed Inst Technol, CH-8093 Zurich, Switzerland; 6.Fac Tecnol Sao Paulo, Ctr Estadual Educ Tecnol, Lab Vidros & Datacao, Sao Paulo, Brazil; 7.Univ Fed Ceara, Dept Geog, BR-60451970 Fortaleza, Ceara, Brazil |
推荐引用方式 GB/T 7714 | Tsoar, Haim,Levin, Noam,Porat, Naomi,et al. The effect of climate change on the mobility and stability of coastal sand dunes in Ceara State (NE Brazil)[J]. Ben-Gurion University of the Negev, Hebrew University of Jerusalem,2009,71(2):217-226. |
APA | Tsoar, Haim.,Levin, Noam.,Porat, Naomi.,Maia, Luis P..,Herrmann, Hans..,...&Claudino-Sales, Vanda.(2009).The effect of climate change on the mobility and stability of coastal sand dunes in Ceara State (NE Brazil).QUATERNARY RESEARCH,71(2),217-226. |
MLA | Tsoar, Haim,et al."The effect of climate change on the mobility and stability of coastal sand dunes in Ceara State (NE Brazil)".QUATERNARY RESEARCH 71.2(2009):217-226. |
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