A century of climate variability in central Dronning Maud Land, East Antarctica, and its relation to Southern Annular Mode and El Nino-Southern Oscillation
Stable isotope records of oxygen and hydrogen were studied from a 65 m long ice core retrieved from central Dronning Maud Land, East Antarctica, in order to reconstruct the coastal Antarctic climate variability during the last century and its relation to the Southern Annular Mode (SAM) and El Nino -...
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ftnio:oai:dsr.nio.org:2264/3702 2023-05-15T13:59:28+02:00 A century of climate variability in central Dronning Maud Land, East Antarctica, and its relation to Southern Annular Mode and El Nino-Southern Oscillation Naik, S.S. Thamban, M. Laluraj, C.M. Redkar, B.L. Chaturvedi, A. 2010 http://drs.nio.org/drs/handle/2264/3702 en eng American Geophysical Union An edited version of this paper was published by AGU. Copyright [2010] AGU. To view the published version & open abstract, go to http://dx.doi.org/10.1029/2009JD013268 climatic changes oxygen isotopes El Nino southern oscillation Journal Article 2010 ftnio 2012-08-25T20:09:44Z Stable isotope records of oxygen and hydrogen were studied from a 65 m long ice core retrieved from central Dronning Maud Land, East Antarctica, in order to reconstruct the coastal Antarctic climate variability during the last century and its relation to the Southern Annular Mode (SAM) and El Nino - Southern Oscillation (ENSO). The delta sup(18)O records showed a significant relation to the SAM with a dominant approx. 4 years variability, except during specific periods (1918-1927, 1938-1947, and 1989-2005) when ENSO teleconnection was established through the in-phase relation between SAM and Southern Oscillation Index (SOI). The combined influence of ENSO and SAM was seen on surface air temperatures in this region mainly during the austral summer season from 1989 to 2005. Further, a significant relationship between delta sup(18)O and SAM was observed on a decadal scale, which overrides the intermittent influence of ENSO. Major shifts in the deuterium excess record were observed during periods of ENSO teleconnections, which support a shift in moisture source regions during the periods of stronger ENSO teleconnections. Surface air temperatures estimated using the delta sup(18)O -T spatial slope for this region depicted a significant warming of 1 degrees C for the past century. The study reveals that throughout the last century, SAM was the dominant mode of climatic variability in the coastal region of central Dronning Maud Land on a decadal scale Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica ice core National Institute of Oceanography, India: Digital Repository Service (DRS@nio) Antarctic Austral Dronning Maud Land East Antarctica Soi ENVELOPE(30.704,30.704,66.481,66.481) |
institution |
Open Polar |
collection |
National Institute of Oceanography, India: Digital Repository Service (DRS@nio) |
op_collection_id |
ftnio |
language |
English |
topic |
climatic changes oxygen isotopes El Nino southern oscillation |
spellingShingle |
climatic changes oxygen isotopes El Nino southern oscillation Naik, S.S. Thamban, M. Laluraj, C.M. Redkar, B.L. Chaturvedi, A. A century of climate variability in central Dronning Maud Land, East Antarctica, and its relation to Southern Annular Mode and El Nino-Southern Oscillation |
topic_facet |
climatic changes oxygen isotopes El Nino southern oscillation |
description |
Stable isotope records of oxygen and hydrogen were studied from a 65 m long ice core retrieved from central Dronning Maud Land, East Antarctica, in order to reconstruct the coastal Antarctic climate variability during the last century and its relation to the Southern Annular Mode (SAM) and El Nino - Southern Oscillation (ENSO). The delta sup(18)O records showed a significant relation to the SAM with a dominant approx. 4 years variability, except during specific periods (1918-1927, 1938-1947, and 1989-2005) when ENSO teleconnection was established through the in-phase relation between SAM and Southern Oscillation Index (SOI). The combined influence of ENSO and SAM was seen on surface air temperatures in this region mainly during the austral summer season from 1989 to 2005. Further, a significant relationship between delta sup(18)O and SAM was observed on a decadal scale, which overrides the intermittent influence of ENSO. Major shifts in the deuterium excess record were observed during periods of ENSO teleconnections, which support a shift in moisture source regions during the periods of stronger ENSO teleconnections. Surface air temperatures estimated using the delta sup(18)O -T spatial slope for this region depicted a significant warming of 1 degrees C for the past century. The study reveals that throughout the last century, SAM was the dominant mode of climatic variability in the coastal region of central Dronning Maud Land on a decadal scale |
format |
Article in Journal/Newspaper |
author |
Naik, S.S. Thamban, M. Laluraj, C.M. Redkar, B.L. Chaturvedi, A. |
author_facet |
Naik, S.S. Thamban, M. Laluraj, C.M. Redkar, B.L. Chaturvedi, A. |
author_sort |
Naik, S.S. |
title |
A century of climate variability in central Dronning Maud Land, East Antarctica, and its relation to Southern Annular Mode and El Nino-Southern Oscillation |
title_short |
A century of climate variability in central Dronning Maud Land, East Antarctica, and its relation to Southern Annular Mode and El Nino-Southern Oscillation |
title_full |
A century of climate variability in central Dronning Maud Land, East Antarctica, and its relation to Southern Annular Mode and El Nino-Southern Oscillation |
title_fullStr |
A century of climate variability in central Dronning Maud Land, East Antarctica, and its relation to Southern Annular Mode and El Nino-Southern Oscillation |
title_full_unstemmed |
A century of climate variability in central Dronning Maud Land, East Antarctica, and its relation to Southern Annular Mode and El Nino-Southern Oscillation |
title_sort |
century of climate variability in central dronning maud land, east antarctica, and its relation to southern annular mode and el nino-southern oscillation |
publisher |
American Geophysical Union |
publishDate |
2010 |
url |
http://drs.nio.org/drs/handle/2264/3702 |
long_lat |
ENVELOPE(30.704,30.704,66.481,66.481) |
geographic |
Antarctic Austral Dronning Maud Land East Antarctica Soi |
geographic_facet |
Antarctic Austral Dronning Maud Land East Antarctica Soi |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica ice core |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica ice core |
op_rights |
An edited version of this paper was published by AGU. Copyright [2010] AGU. To view the published version & open abstract, go to http://dx.doi.org/10.1029/2009JD013268 |
_version_ |
1766268033871904768 |