The influences of the AMO and NAO on the sedimentary infill in an Azores Archipelago lake since ca. 1350 CE
The location of the Azores Archipelago in the North Atlantic makes this group of islands an excellent setting to study the long-term behavior of large oceanic and atmospheric climate dynamic patterns, such as the Atlantic Multidecadal Oscillation (AMO) and the North Atlantic Oscillation (NAO). Here,...
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Online Access: | http://hdl.handle.net/10261/151768 https://doi.org/10.1016/j.gloplacha.2017.05.007 https://doi.org/10.13039/501100003329 https://doi.org/10.13039/501100002809 |
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ftcsic:oai:digital.csic.es:10261/151768 2024-02-11T10:06:21+01:00 The influences of the AMO and NAO on the sedimentary infill in an Azores Archipelago lake since ca. 1350 CE Hernández, Armand Rull, Valentí Rubio de Inglés, Maria Jesús Sánchez-López, Guiomar Giralt, Santiago Ministerio de Economía y Competitividad (España) Generalitat de Catalunya 2017-06 http://hdl.handle.net/10261/151768 https://doi.org/10.1016/j.gloplacha.2017.05.007 https://doi.org/10.13039/501100003329 https://doi.org/10.13039/501100002809 en eng Elsevier https://doi-org.sire.ub.edu/10.1016/j.gloplacha.2017.05.007 Sí Global and Planetary Change, 154: 61-74 (2017) 0921-8181 http://hdl.handle.net/10261/151768 doi:10.1016/j.gloplacha.2017.05.007 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/501100002809 open Climate modes Paleoclimatology Paleolimnology Oceanic Islands Last millennium artículo http://purl.org/coar/resource_type/c_6501 2017 ftcsic https://doi.org/10.1016/j.gloplacha.2017.05.00710.13039/50110000332910.13039/501100002809 2024-01-16T10:24:04Z The location of the Azores Archipelago in the North Atlantic makes this group of islands an excellent setting to study the long-term behavior of large oceanic and atmospheric climate dynamic patterns, such as the Atlantic Multidecadal Oscillation (AMO) and the North Atlantic Oscillation (NAO). Here, we present the impacts of these patterns on Lake Empadadas (Azores Archipelago) from the Medieval Climate Anomaly (MCA) - Little Ice Age (LIA) transition to the present based on sedimentological, geochemical and biological characterizations of the sedimentary record. Multivariate analyses of a number of proxies including X-ray fluorescence (XRF), X-ray diffraction (XRD), total organic and inorganic carbon (TOC and TIC) and diatom life forms abundance reveal that the sedimentary infill evolution has been controlled by (i) fluctuations in the lake level and (ii) variations in organic matter accumulation. Both processes are governed by climate variability and modulated by anthropogenic activities associated with changes on the lake catchment. Changes in these two sedimentary processes have been used to infer five stages: (i) the MCA-LIA transition (ca. 1350–1450 CE) was characterized by a predominantly positive AMO phase, which led to intermediate lake levels and high organic matter concentration; (ii) the first half of the LIA (ca. 1450–1600 CE) was characterized by predominant lowstand conditions and intermediate organic matter deposition mainly related to negative AMO phases; (iii) the second half of the LIA (ca. 1600–1850 CE) was characterized by negative AMO and NAO phases, implying intermediate lake levels and high organic matter deposition; (iv) the Industrial era (ca. 1850–1980 CE) was characterized by the lowest lake level and organic matter accumulation associated with negative AMO phases; and (v) the period spanning between 1980 CE and the present reveals the highest lake levels and low organic matter deposition, being associated with very positive AMO conditions. At decadal-to-centennial scales, the ... Article in Journal/Newspaper North Atlantic North Atlantic oscillation Digital.CSIC (Spanish National Research Council) Global and Planetary Change 154 61 74 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Climate modes Paleoclimatology Paleolimnology Oceanic Islands Last millennium |
spellingShingle |
Climate modes Paleoclimatology Paleolimnology Oceanic Islands Last millennium Hernández, Armand Rull, Valentí Rubio de Inglés, Maria Jesús Sánchez-López, Guiomar Giralt, Santiago The influences of the AMO and NAO on the sedimentary infill in an Azores Archipelago lake since ca. 1350 CE |
topic_facet |
Climate modes Paleoclimatology Paleolimnology Oceanic Islands Last millennium |
description |
The location of the Azores Archipelago in the North Atlantic makes this group of islands an excellent setting to study the long-term behavior of large oceanic and atmospheric climate dynamic patterns, such as the Atlantic Multidecadal Oscillation (AMO) and the North Atlantic Oscillation (NAO). Here, we present the impacts of these patterns on Lake Empadadas (Azores Archipelago) from the Medieval Climate Anomaly (MCA) - Little Ice Age (LIA) transition to the present based on sedimentological, geochemical and biological characterizations of the sedimentary record. Multivariate analyses of a number of proxies including X-ray fluorescence (XRF), X-ray diffraction (XRD), total organic and inorganic carbon (TOC and TIC) and diatom life forms abundance reveal that the sedimentary infill evolution has been controlled by (i) fluctuations in the lake level and (ii) variations in organic matter accumulation. Both processes are governed by climate variability and modulated by anthropogenic activities associated with changes on the lake catchment. Changes in these two sedimentary processes have been used to infer five stages: (i) the MCA-LIA transition (ca. 1350–1450 CE) was characterized by a predominantly positive AMO phase, which led to intermediate lake levels and high organic matter concentration; (ii) the first half of the LIA (ca. 1450–1600 CE) was characterized by predominant lowstand conditions and intermediate organic matter deposition mainly related to negative AMO phases; (iii) the second half of the LIA (ca. 1600–1850 CE) was characterized by negative AMO and NAO phases, implying intermediate lake levels and high organic matter deposition; (iv) the Industrial era (ca. 1850–1980 CE) was characterized by the lowest lake level and organic matter accumulation associated with negative AMO phases; and (v) the period spanning between 1980 CE and the present reveals the highest lake levels and low organic matter deposition, being associated with very positive AMO conditions. At decadal-to-centennial scales, the ... |
author2 |
Ministerio de Economía y Competitividad (España) Generalitat de Catalunya |
format |
Article in Journal/Newspaper |
author |
Hernández, Armand Rull, Valentí Rubio de Inglés, Maria Jesús Sánchez-López, Guiomar Giralt, Santiago |
author_facet |
Hernández, Armand Rull, Valentí Rubio de Inglés, Maria Jesús Sánchez-López, Guiomar Giralt, Santiago |
author_sort |
Hernández, Armand |
title |
The influences of the AMO and NAO on the sedimentary infill in an Azores Archipelago lake since ca. 1350 CE |
title_short |
The influences of the AMO and NAO on the sedimentary infill in an Azores Archipelago lake since ca. 1350 CE |
title_full |
The influences of the AMO and NAO on the sedimentary infill in an Azores Archipelago lake since ca. 1350 CE |
title_fullStr |
The influences of the AMO and NAO on the sedimentary infill in an Azores Archipelago lake since ca. 1350 CE |
title_full_unstemmed |
The influences of the AMO and NAO on the sedimentary infill in an Azores Archipelago lake since ca. 1350 CE |
title_sort |
influences of the amo and nao on the sedimentary infill in an azores archipelago lake since ca. 1350 ce |
publisher |
Elsevier |
publishDate |
2017 |
url |
http://hdl.handle.net/10261/151768 https://doi.org/10.1016/j.gloplacha.2017.05.007 https://doi.org/10.13039/501100003329 https://doi.org/10.13039/501100002809 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
https://doi-org.sire.ub.edu/10.1016/j.gloplacha.2017.05.007 Sí Global and Planetary Change, 154: 61-74 (2017) 0921-8181 http://hdl.handle.net/10261/151768 doi:10.1016/j.gloplacha.2017.05.007 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/501100002809 |
op_rights |
open |
op_doi |
https://doi.org/10.1016/j.gloplacha.2017.05.00710.13039/50110000332910.13039/501100002809 |
container_title |
Global and Planetary Change |
container_volume |
154 |
container_start_page |
61 |
op_container_end_page |
74 |
_version_ |
1790603995183579136 |