The effect of climate change on the mobility and stability of coastal sand dunes in Ceará State (NE Brazil)
Abstract The coast of Ceará 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 neg...
Published in: | Quaternary Research |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2009
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1016/j.yqres.2008.12.001 http://api.elsevier.com/content/article/PII:S0033589408001464?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589408001464?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400005780 |
id |
crcambridgeupr:10.1016/j.yqres.2008.12.001 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1016/j.yqres.2008.12.001 2024-06-23T07:53:21+00:00 The effect of climate change on the mobility and stability of coastal sand dunes in Ceará State (NE Brazil) Tsoar, Haim Levin, Noam Porat, Naomi Maia, Luis P. Herrmann, Hans J. Tatumi, Sonia H. Claudino-Sales, Vanda 2009 http://dx.doi.org/10.1016/j.yqres.2008.12.001 http://api.elsevier.com/content/article/PII:S0033589408001464?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589408001464?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400005780 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 71, issue 2, page 217-226 ISSN 0033-5894 1096-0287 journal-article 2009 crcambridgeupr https://doi.org/10.1016/j.yqres.2008.12.001 2024-06-12T04:02:19Z Abstract The coast of Ceará 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 Ceará gave ages ranging from135 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. Article in Journal/Newspaper Greenland Greenland ice core ice core Cambridge University Press Greenland Quaternary Research 71 2 217 226 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract The coast of Ceará 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 Ceará gave ages ranging from135 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. |
format |
Article in Journal/Newspaper |
author |
Tsoar, Haim Levin, Noam Porat, Naomi Maia, Luis P. Herrmann, Hans J. Tatumi, Sonia H. Claudino-Sales, Vanda |
spellingShingle |
Tsoar, Haim Levin, Noam Porat, Naomi Maia, Luis P. Herrmann, Hans J. Tatumi, Sonia H. Claudino-Sales, Vanda The effect of climate change on the mobility and stability of coastal sand dunes in Ceará State (NE Brazil) |
author_facet |
Tsoar, Haim Levin, Noam Porat, Naomi Maia, Luis P. Herrmann, Hans J. Tatumi, Sonia H. Claudino-Sales, Vanda |
author_sort |
Tsoar, Haim |
title |
The effect of climate change on the mobility and stability of coastal sand dunes in Ceará State (NE Brazil) |
title_short |
The effect of climate change on the mobility and stability of coastal sand dunes in Ceará State (NE Brazil) |
title_full |
The effect of climate change on the mobility and stability of coastal sand dunes in Ceará State (NE Brazil) |
title_fullStr |
The effect of climate change on the mobility and stability of coastal sand dunes in Ceará State (NE Brazil) |
title_full_unstemmed |
The effect of climate change on the mobility and stability of coastal sand dunes in Ceará State (NE Brazil) |
title_sort |
effect of climate change on the mobility and stability of coastal sand dunes in ceará state (ne brazil) |
publisher |
Cambridge University Press (CUP) |
publishDate |
2009 |
url |
http://dx.doi.org/10.1016/j.yqres.2008.12.001 http://api.elsevier.com/content/article/PII:S0033589408001464?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589408001464?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400005780 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice core ice core |
genre_facet |
Greenland Greenland ice core ice core |
op_source |
Quaternary Research volume 71, issue 2, page 217-226 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1016/j.yqres.2008.12.001 |
container_title |
Quaternary Research |
container_volume |
71 |
container_issue |
2 |
container_start_page |
217 |
op_container_end_page |
226 |
_version_ |
1802644956452487168 |