國立虎尾科技大學 |

The use of coastal lagoon sediments to track the long-term hurricane history of Jamaica, West Indies.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	The use of coastal lagoon sediments to track the long-term hurricane history of Jamaica, West Indies./
Author:	Heller, Charlotte.
Description:	1 online resource (46 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 75-01C.
Subject:	Environmental studies. -
Online resource:	click for full text (PQDT)

The use of coastal lagoon sediments to track the long-term hurricane history of Jamaica, West Indies.
Heller, Charlotte.

The use of coastal lagoon sediments to track the long-term hurricane history of Jamaica, West Indies. - 1 online resource (46 pages)

Source: Dissertation Abstracts International, Volume: 75-01C.

Thesis (Ph.D.)--Queen's University (Canada), 2017.

Includes bibliographical references

Long-term data are needed to properly assess the influence of anthropogenic climate change on Atlantic hurricane frequency, however hurricane records are inconsistent prior to the development of modern monitoring techniques. Paleolimnological investigations from coastal Caribbean lagoons can be used to track changes in Atlantic hurricane activity because coastal lagoons can become inundated with seawater during hurricane events, which leaves distinct biological and geochemical signals in their sediments. This study analyzes changes in fossil diatom assemblages and chlorophyll-alpha (chl-alpha) concentrations of a ~1,500 year old sediment core from Grape Tree Pond, a coastal lagoon located in southern Jamaica. The diatom and chl-a profiles were used to evaluate overall changes in salinity and primary production, as well as to identify potential periods of enhanced hurricane activity. The results of this research identified three periods of pronounced hurricane activity around 1350, 1725-1785, and 1900-1925 CE, which were indicated by mixed-salinity diatom assemblages and distinct changes in chl-a concentrations. Additionally, two periods of drought occurring during 1650-1725 and ~1785-1900 were identified by low diatom abundance and decreased chl-a concentrations. These changes in the diatom assemblage and chl-a concentrations show that climate variability has increased following the onset of the Little Ice Age (~1450-1850 CE), however it is difficult to distinguish the impacts of recent anthropogenic climate warming on hurricane activity from those of natural Atlantic climate regimes, such as ENSO. This study is one of the first to report on the diatom species found in Jamaica, and demonstrates the potential of using fossil diatoms from coastal lagoons to track past storm activity.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

Subjects--Topical Terms:

1180247
Environmental studies.
Index Terms--Genre/Form:

554714
Electronic books.

The use of coastal lagoon sediments to track the long-term hurricane history of Jamaica, West Indies.
LDR:02901ntm a2200289K 4500 001 912369
005 20180608141652.5
006 m o u
007 cr mn||||a|a||
008 190606s2017 xx obm 000 0 eng d
035 $a (MiAaPQ)AAI10593499
035 $a (MiAaPQ)QueensUCan197415658
035 $a AAI10593499
040 $a MiAaPQ $b eng $c MiAaPQ
100 1 $a Heller, Charlotte. $3 1184703
245 1 4 $a The use of coastal lagoon sediments to track the long-term hurricane history of Jamaica, West Indies.
264 0 $c 2017
300 $a 1 online resource (46 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertation Abstracts International, Volume: 75-01C.
502 $a Thesis (Ph.D.)--Queen's University (Canada), 2017.
504 $a Includes bibliographical references
520 $a Long-term data are needed to properly assess the influence of anthropogenic climate change on Atlantic hurricane frequency, however hurricane records are inconsistent prior to the development of modern monitoring techniques. Paleolimnological investigations from coastal Caribbean lagoons can be used to track changes in Atlantic hurricane activity because coastal lagoons can become inundated with seawater during hurricane events, which leaves distinct biological and geochemical signals in their sediments. This study analyzes changes in fossil diatom assemblages and chlorophyll-alpha (chl-alpha) concentrations of a ~1,500 year old sediment core from Grape Tree Pond, a coastal lagoon located in southern Jamaica. The diatom and chl-a profiles were used to evaluate overall changes in salinity and primary production, as well as to identify potential periods of enhanced hurricane activity. The results of this research identified three periods of pronounced hurricane activity around 1350, 1725-1785, and 1900-1925 CE, which were indicated by mixed-salinity diatom assemblages and distinct changes in chl-a concentrations. Additionally, two periods of drought occurring during 1650-1725 and ~1785-1900 were identified by low diatom abundance and decreased chl-a concentrations. These changes in the diatom assemblage and chl-a concentrations show that climate variability has increased following the onset of the Little Ice Age (~1450-1850 CE), however it is difficult to distinguish the impacts of recent anthropogenic climate warming on hurricane activity from those of natural Atlantic climate regimes, such as ENSO. This study is one of the first to report on the diatom species found in Jamaica, and demonstrates the potential of using fossil diatoms from coastal lagoons to track past storm activity.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Environmental studies. $3 1180247
655 7 $a Electronic books. $2 local $3 554714
690 $a 0477
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a Queen's University (Canada). $3 1148613
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10593499 $z click for full text (PQDT)