Modern rates of glacial sediment accumulation along a 15° S‐N transect in fjords from the Antarctic Peninsula to southern Chile
Identifieur interne : 002909 ( Istex/Corpus ); précédent : 002908; suivant : 002910Modern rates of glacial sediment accumulation along a 15° S‐N transect in fjords from the Antarctic Peninsula to southern Chile
Auteurs : Katherine V. Boldt ; Charles A. Nittrouer ; Bernard Hallet ; Michele N. Koppes ; Brittany K. Forrest ; Julia S. Wellner ; John B. AndersonSource :
- Journal of Geophysical Research: Earth Surface [ 2169-9003 ] ; 2013-12.
Abstract
Rates of glacial erosion in temperate climates rank among the highest worldwide, and the sedimentary products of such erosion record climatic and tectonic signals in many glaciated settings, as well as temporal changes in glacier behavior. Glacial sediment yields are expected to decrease with increasing latitude because decreased temperature and meltwater production reduce glacial sliding, erosion, and sediment transfer; however, this expectation lacks a solid supportive database. Herein we present modern 210Pb‐derived sediment accumulation rates on decadal to century time scales for 12 fjords spanning 15° of latitude from the Antarctic Peninsula to southern Chile and interpret the results in light of glacimarine sediment accumulation worldwide. 210Pb records from the Antarctic Peninsula show surprisingly steady sediment accumulation throughout the past century at rates of 1–7 mm yr−1, despite rapid warming and glacial retreat. Cores from the South Shetland Islands reveal accelerated sediment accumulation over the past few decades, likely due to changes in the thermal state of the glaciers in this region, which straddles the boundary between subpolar and temperate conditions. In Patagonia and Tierra del Fuego, sediment accumulates faster (11–24 mm yr−1), and previously collected seismic profiles show that rates reach meters per year close to the glacier termini. This increase in sediment accumulation rates with decreasing latitude reflects the gradient from subpolar to temperate climates and is consistent with glacial erosion being much faster in the temperate climate of southern Chile than in the polar climate of the Antarctic Peninsula.
Url:
DOI: 10.1002/jgrf.20145
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Anderson</name><affiliation><mods:affiliation>Department of Earth Science, Rice University, Texas, Houston, USA</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Geophysical Research: Earth Surface</title><title level="j" type="abbrev">J. Geophys. Res. Earth Surf.</title><idno type="ISSN">2169-9003</idno><idno type="eISSN">2169-9011</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2013-12">2013-12</date><biblScope unit="volume">118</biblScope><biblScope unit="issue">4</biblScope><biblScope unit="page" from="2072">2072</biblScope><biblScope unit="page" to="2088">2088</biblScope></imprint><idno type="ISSN">2169-9003</idno></series><idno type="istex">47DE47930ECF0D8B706073979DF63AF3F43FE2A8</idno><idno type="DOI">10.1002/jgrf.20145</idno><idno type="ArticleID">JGRF20145</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">2169-9003</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">Rates of glacial erosion in temperate climates rank among the highest worldwide, and the sedimentary products of such erosion record climatic and tectonic signals in many glaciated settings, as well as temporal changes in glacier behavior. Glacial sediment yields are expected to decrease with increasing latitude because decreased temperature and meltwater production reduce glacial sliding, erosion, and sediment transfer; however, this expectation lacks a solid supportive database. Herein we present modern 210Pb‐derived sediment accumulation rates on decadal to century time scales for 12 fjords spanning 15° of latitude from the Antarctic Peninsula to southern Chile and interpret the results in light of glacimarine sediment accumulation worldwide. 210Pb records from the Antarctic Peninsula show surprisingly steady sediment accumulation throughout the past century at rates of 1–7 mm yr−1, despite rapid warming and glacial retreat. Cores from the South Shetland Islands reveal accelerated sediment accumulation over the past few decades, likely due to changes in the thermal state of the glaciers in this region, which straddles the boundary between subpolar and temperate conditions. In Patagonia and Tierra del Fuego, sediment accumulates faster (11–24 mm yr−1), and previously collected seismic profiles show that rates reach meters per year close to the glacier termini. This increase in sediment accumulation rates with decreasing latitude reflects the gradient from subpolar to temperate climates and is consistent with glacial erosion being much faster in the temperate climate of southern Chile than in the polar climate of the Antarctic Peninsula.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Katherine V. Boldt</name><affiliations><json:string>School of Oceanography, University of Washington, Washington, Seattle, USA</json:string><json:string>E-mail: kboldt@uw.edu</json:string></affiliations></json:item><json:item><name>Charles A. 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Wellner</name><affiliations><json:string>Department of Earth and Atmospheric Sciences, University of Houston, Texas, Houston, USA</json:string></affiliations></json:item><json:item><name>John B. Anderson</name><affiliations><json:string>Department of Earth Science, Rice University, Texas, Houston, USA</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>sediments</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>210‐Pb geochronology</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>glacial erosion</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>regional warming</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Antarctic Peninsula</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Patagonia</value></json:item></subject><articleId><json:string>JGRF20145</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><qualityIndicators><score>9.404</score><pdfVersion>1.6</pdfVersion><pdfPageSize>612 x 792 pts (letter)</pdfPageSize><refBibsNative>true</refBibsNative><abstractCharCount>1666</abstractCharCount><pdfWordCount>10723</pdfWordCount><pdfCharCount>67143</pdfCharCount><pdfPageCount>17</pdfPageCount><abstractWordCount>242</abstractWordCount></qualityIndicators><title>Modern rates of glacial sediment accumulation along a 15° S‐N transect in fjords from the Antarctic Peninsula to southern Chile</title><genre><json:string>article</json:string></genre><host><title>Journal of Geophysical Research: Earth Surface</title><language><json:string>unknown</json:string></language><doi><json:string>10.1002/(ISSN)2169-9011</json:string></doi><issn><json:string>2169-9003</json:string></issn><eissn><json:string>2169-9011</json:string></eissn><publisherId><json:string>JGRF</json:string></publisherId><volume>118</volume><issue>4</issue><pages><first>2072</first><last>2088</last><total>17</total></pages><genre><json:string>journal</json:string></genre><subject><json:item><value>CRYOSPHERE</value></json:item><json:item><value>Glaciers</value></json:item><json:item><value>GEOCHEMISTRY</value></json:item><json:item><value>Sedimentary geochemistry</value></json:item><json:item><value>GEOCHRONOLOGY</value></json:item><json:item><value>Sedimentary geochronology</value></json:item><json:item><value>GEODESY AND GRAVITY</value></json:item><json:item><value>Global change from geodesy</value></json:item><json:item><value>GLOBAL CHANGE</value></json:item><json:item><value>Impacts of global change</value></json:item><json:item><value>OCEANOGRAPHY: GENERAL</value></json:item><json:item><value>Arctic and Antarctic oceanography</value></json:item><json:item><value>NATURAL HAZARDS</value></json:item><json:item><value>Climate impact</value></json:item><json:item><value>GEOGRAPHIC LOCATION</value></json:item><json:item><value>Antarctica</value></json:item><json:item><value>Regular Article</value></json:item></subject></host><publicationDate>2013</publicationDate><copyrightDate>2013</copyrightDate><doi><json:string>10.1002/jgrf.20145</json:string></doi><id>47DE47930ECF0D8B706073979DF63AF3F43FE2A8</id><fulltext><json:item><extension>pdf</extension><original>true</original><mimetype>application/pdf</mimetype><uri>https://api-v5.istex.fr/document/47DE47930ECF0D8B706073979DF63AF3F43FE2A8/fulltext/pdf</uri></json:item><json:item><extension>zip</extension><original>false</original><mimetype>application/zip</mimetype><uri>https://api-v5.istex.fr/document/47DE47930ECF0D8B706073979DF63AF3F43FE2A8/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api-v5.istex.fr/document/47DE47930ECF0D8B706073979DF63AF3F43FE2A8/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Modern rates of glacial sediment accumulation along a 15° S‐N transect in fjords from the Antarctic Peninsula to southern Chile</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>Blackwell Publishing Ltd</publisher><availability><p>©2013. American Geophysical Union. All Rights Reserved.©2013. American Geophysical Union. All Rights Reserved.</p></availability><date>2013-09-19</date></publicationStmt><notesStmt><note>National Science Foundation Office of Polar Programs - No. NSF/OPP 03–38137;</note></notesStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Modern rates of glacial sediment accumulation along a 15° S‐N transect in fjords from the Antarctic Peninsula to southern Chile</title><author xml:id="author-1"><persName><forename type="first">Katherine V.</forename><surname>Boldt</surname></persName><email>kboldt@uw.edu</email><affiliation>School of Oceanography, University of Washington, Washington, Seattle, USA</affiliation></author><author xml:id="author-2"><persName><forename type="first">Charles A.</forename><surname>Nittrouer</surname></persName><affiliation>School of Oceanography, University of Washington, Seattle, Washington, USA</affiliation><affiliation>Department of Earth and Space Sciences and Quaternary Research Center, University of Washington, Washington, Seattle, USA</affiliation></author><author xml:id="author-3"><persName><forename type="first">Bernard</forename><surname>Hallet</surname></persName><affiliation>Department of Earth and Space Sciences and Quaternary Research Center, University of Washington, Washington, Seattle, USA</affiliation></author><author xml:id="author-4"><persName><forename type="first">Michele N.</forename><surname>Koppes</surname></persName><affiliation>Department of Geography, University of British Columbia, British Columbia, Vancouver, Canada</affiliation></author><author xml:id="author-5"><persName><forename type="first">Brittany K.</forename><surname>Forrest</surname></persName><affiliation>School of Oceanography, University of Washington, Washington, Seattle, USA</affiliation></author><author xml:id="author-6"><persName><forename type="first">Julia S.</forename><surname>Wellner</surname></persName><affiliation>Department of Earth and Atmospheric Sciences, University of Houston, Texas, Houston, USA</affiliation></author><author xml:id="author-7"><persName><forename type="first">John B.</forename><surname>Anderson</surname></persName><affiliation>Department of Earth Science, Rice University, Texas, Houston, USA</affiliation></author></analytic><monogr><title level="j">Journal of Geophysical Research: Earth Surface</title><title level="j" type="abbrev">J. Geophys. Res. Earth Surf.</title><idno type="pISSN">2169-9003</idno><idno type="eISSN">2169-9011</idno><idno type="DOI">10.1002/(ISSN)2169-9011</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2013-12"></date><biblScope unit="volume">118</biblScope><biblScope unit="issue">4</biblScope><biblScope unit="page" from="2072">2072</biblScope><biblScope unit="page" to="2088">2088</biblScope></imprint></monogr><idno type="istex">47DE47930ECF0D8B706073979DF63AF3F43FE2A8</idno><idno type="DOI">10.1002/jgrf.20145</idno><idno type="ArticleID">JGRF20145</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2013-09-19</date></creation><langUsage><language ident="en">en</language></langUsage><abstract><p>Rates of glacial erosion in temperate climates rank among the highest worldwide, and the sedimentary products of such erosion record climatic and tectonic signals in many glaciated settings, as well as temporal changes in glacier behavior. Glacial sediment yields are expected to decrease with increasing latitude because decreased temperature and meltwater production reduce glacial sliding, erosion, and sediment transfer; however, this expectation lacks a solid supportive database. Herein we present modern 210Pb‐derived sediment accumulation rates on decadal to century time scales for 12 fjords spanning 15° of latitude from the Antarctic Peninsula to southern Chile and interpret the results in light of glacimarine sediment accumulation worldwide. 210Pb records from the Antarctic Peninsula show surprisingly steady sediment accumulation throughout the past century at rates of 1–7 mm yr−1, despite rapid warming and glacial retreat. Cores from the South Shetland Islands reveal accelerated sediment accumulation over the past few decades, likely due to changes in the thermal state of the glaciers in this region, which straddles the boundary between subpolar and temperate conditions. In Patagonia and Tierra del Fuego, sediment accumulates faster (11–24 mm yr−1), and previously collected seismic profiles show that rates reach meters per year close to the glacier termini. This increase in sediment accumulation rates with decreasing latitude reflects the gradient from subpolar to temperate climates and is consistent with glacial erosion being much faster in the temperate climate of southern Chile than in the polar climate of the Antarctic Peninsula.</p></abstract><abstract style="short"><p>Sediment accumulation rates measured in temperate to subpolar glacial fjords Accumulation rates in Patagonia are significantly greater than those in Antarctica Steady accumulation during rapid climate change along the Antarctic Peninsula</p></abstract><textClass><keywords scheme="keyword"><list><head>keywords</head><item><term>sediments</term></item><item><term>210‐Pb geochronology</term></item><item><term>glacial erosion</term></item><item><term>regional warming</term></item><item><term>Antarctic Peninsula</term></item><item><term>Patagonia</term></item></list></keywords></textClass><textClass><keywords scheme="Journal Subject"><list><head>index-terms</head><item><term>CRYOSPHERE</term></item><item><term>Glaciers</term></item><item><term>GEOCHEMISTRY</term></item><item><term>Sedimentary geochemistry</term></item><item><term>GEOCHRONOLOGY</term></item><item><term>Sedimentary geochronology</term></item><item><term>GEODESY AND GRAVITY</term></item><item><term>Global change from geodesy</term></item><item><term>GLOBAL CHANGE</term></item><item><term>Impacts of global change</term></item><item><term>OCEANOGRAPHY: GENERAL</term></item><item><term>Arctic and Antarctic oceanography</term></item><item><term>NATURAL HAZARDS</term></item><item><term>Climate impact</term></item><item><term>GEOGRAPHIC LOCATION</term></item><item><term>Antarctica</term></item></list></keywords></textClass><textClass><keywords scheme="Journal Subject"><list><head>article-category</head><item><term>Regular Article</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2013-01-24">Received</change><change when="2013-09-09">Registration</change><change when="2013-09-19">Created</change><change when="2013-12">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api-v5.istex.fr/document/47DE47930ECF0D8B706073979DF63AF3F43FE2A8/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component type="serialArticle" version="2.0" xml:lang="en" xml:id="jgrf20145"><header><publicationMeta level="product"><doi>10.1002/(ISSN)2169-9011</doi><issn type="print">2169-9003</issn><issn type="electronic">2169-9011</issn><idGroup><id type="product" value="JGRF"></id></idGroup><titleGroup><title type="main" sort="JOURNAL OF GEOPHYSICAL RESEARCH: EARTH SURFACE">Journal of Geophysical Research: Earth Surface</title><title type="short">J. Geophys. Res. Earth Surf.</title></titleGroup></publicationMeta><publicationMeta level="part" position="40"><doi>10.1002/jgrf.v118.4</doi><copyright>©2013. American Geophysical Union. All Rights Reserved.</copyright><numberingGroup><numbering type="journalVolume" number="118">118</numbering><numbering type="journalIssue">4</numbering></numberingGroup><coverDate startDate="2013-12">December 2013</coverDate></publicationMeta><publicationMeta level="unit" position="50" type="article" status="forIssue"><doi>10.1002/jgrf.20145</doi><idGroup><id type="unit" value="JGRF20145"></id><id type="society" value="2013JF002736"></id></idGroup><countGroup><count type="pageTotal" number="17"></count></countGroup><titleGroup><title type="articleCategory">Regular Article</title><title type="tocHeading1">Regular Articles</title></titleGroup><copyright ownership="publisher">©2013. American Geophysical Union. All Rights Reserved.</copyright><eventGroup><event type="manuscriptReceived" date="2013-01-24"></event><event type="manuscriptRevised" date="2013-09-05"></event><event type="manuscriptAccepted" date="2013-09-09"></event><event type="xmlCreated" agent="SPi Global" date="2013-09-19"></event><event type="publishedOnlineAccepted" date="2013-09-13"></event><event type="publishedOnlineEarlyUnpaginated" date="2013-10-10"></event><event type="publishedOnlineFinalForm" date="2014-01-17"></event><event type="firstOnline" date="2013-10-10"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.7.5 mode:FullText" date="2016-01-22"></event></eventGroup><numberingGroup><numbering type="pageFirst">2072</numbering><numbering type="pageLast">2088</numbering></numberingGroup><correspondenceTo>Corresponding author: K. V. Boldt, School of Oceanography, University of Washington, Box 357940, Seattle, WA 98195, USA. (<email>kboldt@uw.edu</email>)</correspondenceTo><subjectInfo><subject href="http://psi.agu.org/taxonomy5/0700">CRYOSPHERE</subject><subjectInfo><subject href="http://psi.agu.org/taxonomy5/0720">Glaciers</subject></subjectInfo><subject href="http://psi.agu.org/taxonomy5/1000">GEOCHEMISTRY</subject><subjectInfo><subject href="http://psi.agu.org/taxonomy5/1051">Sedimentary geochemistry</subject></subjectInfo><subject href="http://psi.agu.org/taxonomy5/1100">GEOCHRONOLOGY</subject><subjectInfo><subject href="http://psi.agu.org/taxonomy5/1165">Sedimentary geochronology</subject></subjectInfo><subject href="http://psi.agu.org/taxonomy5/1200" role="crossTerm">GEODESY AND GRAVITY</subject><subjectInfo><subject href="http://psi.agu.org/taxonomy5/1225" role="crossTerm">Global change from geodesy</subject></subjectInfo><subject href="http://psi.agu.org/taxonomy5/1600">GLOBAL CHANGE</subject><subjectInfo><subject href="http://psi.agu.org/taxonomy5/1630">Impacts of global change</subject></subjectInfo><subject href="http://psi.agu.org/taxonomy5/4200" role="crossTerm">OCEANOGRAPHY: GENERAL</subject><subjectInfo><subject href="http://psi.agu.org/taxonomy5/4207" role="crossTerm">Arctic and Antarctic oceanography</subject></subjectInfo><subject href="http://psi.agu.org/taxonomy5/4300" role="crossTerm">NATURAL HAZARDS</subject><subjectInfo><subject href="http://psi.agu.org/taxonomy5/4321" role="crossTerm">Climate impact</subject></subjectInfo><subject href="http://psi.agu.org/taxonomy5/9300">GEOGRAPHIC LOCATION</subject><subjectInfo><subject href="http://psi.agu.org/taxonomy5/9310">Antarctica</subject></subjectInfo></subjectInfo><selfCitationGroup><citation type="self" xml:id="jgrf20145-cit-0000"><author><familyName>Boldt</familyName>, <givenNames>K. V.</givenNames></author>, <author><givenNames>C. A.</givenNames><familyName>Nittrouer</familyName></author>, <author><givenNames>B.</givenNames><familyName>Hallet</familyName></author>, <author><givenNames>M. N.</givenNames><familyName>Koppes</familyName></author>, <author><givenNames>B. K.</givenNames><familyName>Forrest</familyName></author>, <author><givenNames>J. S.</givenNames><familyName>Wellner</familyName></author>, and <author><givenNames>J. B.</givenNames><familyName>Anderson</familyName></author> (<pubYear year="2013">2013</pubYear>), <articleTitle>Modern rates of glacial sediment accumulation along a 15° S‐N transect in fjords from the Antarctic Peninsula to southern Chile</articleTitle>, <journalTitle>J. Geophys. Res. Earth Surf.</journalTitle>, <vol number="118">118</vol>, <pageFirst>2072</pageFirst>–<pageLast>2088</pageLast>, doi:<accessionId ref="info:doi/10.1002/jgrf.20145">10.1002/jgrf.20145</accessionId>.</citation></selfCitationGroup><linkGroup><link type="toTypesetVersion" href="file:JGRF.JGRF20145.pdf"></link></linkGroup></publicationMeta><contentMeta><titleGroup><title type="main">Modern rates of glacial sediment accumulation along a 15° S‐N transect in fjords from the Antarctic Peninsula to southern Chile</title><title type="short">FJORD GLACIAL SEDIMENT ACCUMULATION</title><title type="shortAuthors">BOLDT ET AL.</title></titleGroup><creators><creator creatorRole="author" xml:id="jgrf20145-cr-0001" affiliationRef="#jgrf20145-aff-0001" corresponding="yes"><personName><givenNames>Katherine V.</givenNames><familyName>Boldt</familyName></personName></creator><creator creatorRole="author" xml:id="jgrf20145-cr-0002" affiliationRef="#jgrf20145-aff-0001 #jgrf20145-aff-0002"><personName><givenNames>Charles A.</givenNames><familyName>Nittrouer</familyName></personName></creator><creator creatorRole="author" xml:id="jgrf20145-cr-0003" affiliationRef="#jgrf20145-aff-0002"><personName><givenNames>Bernard</givenNames><familyName>Hallet</familyName></personName></creator><creator creatorRole="author" xml:id="jgrf20145-cr-0004" affiliationRef="#jgrf20145-aff-0003"><personName><givenNames>Michele N.</givenNames><familyName>Koppes</familyName></personName></creator><creator creatorRole="author" xml:id="jgrf20145-cr-0005" affiliationRef="#jgrf20145-aff-0001"><personName><givenNames>Brittany K.</givenNames><familyName>Forrest</familyName></personName></creator><creator creatorRole="author" xml:id="jgrf20145-cr-0006" affiliationRef="#jgrf20145-aff-0004"><personName><givenNames>Julia S.</givenNames><familyName>Wellner</familyName></personName></creator><creator creatorRole="author" xml:id="jgrf20145-cr-0007" affiliationRef="#jgrf20145-aff-0005"><personName><givenNames>John B.</givenNames><familyName>Anderson</familyName></personName></creator></creators><affiliationGroup><affiliation countryCode="US" type="organization" xml:id="jgrf20145-aff-0001"><orgDiv>School of Oceanography</orgDiv><orgName>University of Washington</orgName><address><city>Seattle</city><countryPart>Washington</countryPart><country>USA</country></address></affiliation><affiliation countryCode="US" type="organization" xml:id="jgrf20145-aff-0002"><orgDiv>Department of Earth and Space Sciences and Quaternary Research Center</orgDiv><orgName>University of Washington</orgName><address><city>Seattle</city><countryPart>Washington</countryPart><country>USA</country></address></affiliation><affiliation countryCode="CA" type="organization" xml:id="jgrf20145-aff-0003"><orgDiv>Department of Geography</orgDiv><orgName>University of British Columbia</orgName><address><city>Vancouver</city><countryPart>British Columbia</countryPart><country>Canada</country></address></affiliation><affiliation countryCode="US" type="organization" xml:id="jgrf20145-aff-0004"><orgDiv>Department of Earth and Atmospheric Sciences</orgDiv><orgName>University of Houston</orgName><address><city>Houston</city><countryPart>Texas</countryPart><country>USA</country></address></affiliation><affiliation countryCode="US" type="organization" xml:id="jgrf20145-aff-0005"><orgDiv>Department of Earth Science</orgDiv><orgName>Rice University</orgName><address><city>Houston</city><countryPart>Texas</countryPart><country>USA</country></address></affiliation></affiliationGroup><keywordGroup type="author"><keyword xml:id="jgrf20145-kwd-0001">sediments</keyword><keyword xml:id="jgrf20145-kwd-0002">210‐Pb geochronology</keyword><keyword xml:id="jgrf20145-kwd-0003">glacial erosion</keyword><keyword xml:id="jgrf20145-kwd-0004">regional warming</keyword><keyword xml:id="jgrf20145-kwd-0005">Antarctic Peninsula</keyword><keyword xml:id="jgrf20145-kwd-0006">Patagonia</keyword></keywordGroup><fundingInfo><fundingAgency>National Science Foundation Office of Polar Programs</fundingAgency><fundingNumber>NSF/OPP 03–38137</fundingNumber></fundingInfo><abstractGroup><abstract type="main"><title type="main">Abstract</title><p label="1">Rates of glacial erosion in temperate climates rank among the highest worldwide, and the sedimentary products of such erosion record climatic and tectonic signals in many glaciated settings, as well as temporal changes in glacier behavior. Glacial sediment yields are expected to decrease with increasing latitude because decreased temperature and meltwater production reduce glacial sliding, erosion, and sediment transfer; however, this expectation lacks a solid supportive database. Herein we present modern <sup>210</sup>Pb‐derived sediment accumulation rates on decadal to century time scales for 12 fjords spanning 15° of latitude from the Antarctic Peninsula to southern Chile and interpret the results in light of glacimarine sediment accumulation worldwide. <sup>210</sup>Pb records from the Antarctic Peninsula show surprisingly steady sediment accumulation throughout the past century at rates of 1–7 mm yr<sup>−1</sup>, despite rapid warming and glacial retreat. Cores from the South Shetland Islands reveal accelerated sediment accumulation over the past few decades, likely due to changes in the thermal state of the glaciers in this region, which straddles the boundary between subpolar and temperate conditions. In Patagonia and Tierra del Fuego, sediment accumulates faster (11–24 mm yr<sup>−1</sup>), and previously collected seismic profiles show that rates reach meters per year close to the glacier termini. This increase in sediment accumulation rates with decreasing latitude reflects the gradient from subpolar to temperate climates and is consistent with glacial erosion being much faster in the temperate climate of southern Chile than in the polar climate of the Antarctic Peninsula.</p></abstract><abstract type="short"><title type="main">Key Points</title><p><list style="bulleted" xml:id="jgrf20145-list-0001"><listItem xml:id="jgrf20145-li-0001">Sediment accumulation rates measured in temperate to subpolar glacial fjords</listItem><listItem xml:id="jgrf20145-li-0002">Accumulation rates in Patagonia are significantly greater than those in Antarctica</listItem><listItem xml:id="jgrf20145-li-0003">Steady accumulation during rapid climate change along the Antarctic Peninsula</listItem></list></p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Modern rates of glacial sediment accumulation along a 15° S‐N transect in fjords from the Antarctic Peninsula to southern Chile</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>FJORD GLACIAL SEDIMENT ACCUMULATION</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Modern rates of glacial sediment accumulation along a 15° S‐N transect in fjords from the Antarctic Peninsula to southern Chile</title></titleInfo><name type="personal"><namePart type="given">Katherine V.</namePart><namePart type="family">Boldt</namePart><affiliation>School of Oceanography, University of Washington, Washington, Seattle, USA</affiliation><affiliation>E-mail: kboldt@uw.edu</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Charles A.</namePart><namePart type="family">Nittrouer</namePart><affiliation>School of Oceanography, University of Washington, Seattle, Washington, USA</affiliation><affiliation>Department of Earth and Space Sciences and Quaternary Research Center, University of Washington, Washington, Seattle, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Bernard</namePart><namePart type="family">Hallet</namePart><affiliation>Department of Earth and Space Sciences and Quaternary Research Center, University of Washington, Washington, Seattle, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Michele N.</namePart><namePart type="family">Koppes</namePart><affiliation>Department of Geography, University of British Columbia, British Columbia, Vancouver, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Brittany K.</namePart><namePart type="family">Forrest</namePart><affiliation>School of Oceanography, University of Washington, Washington, Seattle, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Julia S.</namePart><namePart type="family">Wellner</namePart><affiliation>Department of Earth and Atmospheric Sciences, University of Houston, Texas, Houston, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">John B.</namePart><namePart type="family">Anderson</namePart><affiliation>Department of Earth Science, Rice University, Texas, Houston, USA</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><dateIssued encoding="w3cdtf">2013-12</dateIssued><dateCreated encoding="w3cdtf">2013-09-19</dateCreated><dateCaptured encoding="w3cdtf">2013-01-24</dateCaptured><dateValid encoding="w3cdtf">2013-09-09</dateValid><edition>Boldt, K. V., C. A. Nittrouer, B. Hallet, M. N. Koppes, B. K. Forrest, J. S. Wellner, and J. B. Anderson (2013), Modern rates of glacial sediment accumulation along a 15° S‐N transect in fjords from the Antarctic Peninsula to southern Chile, J. Geophys. Res. Earth Surf., 118, 2072–2088, doi:10.1002/jgrf.20145.</edition><copyrightDate encoding="w3cdtf">2013</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract>Rates of glacial erosion in temperate climates rank among the highest worldwide, and the sedimentary products of such erosion record climatic and tectonic signals in many glaciated settings, as well as temporal changes in glacier behavior. Glacial sediment yields are expected to decrease with increasing latitude because decreased temperature and meltwater production reduce glacial sliding, erosion, and sediment transfer; however, this expectation lacks a solid supportive database. Herein we present modern 210Pb‐derived sediment accumulation rates on decadal to century time scales for 12 fjords spanning 15° of latitude from the Antarctic Peninsula to southern Chile and interpret the results in light of glacimarine sediment accumulation worldwide. 210Pb records from the Antarctic Peninsula show surprisingly steady sediment accumulation throughout the past century at rates of 1–7 mm yr−1, despite rapid warming and glacial retreat. Cores from the South Shetland Islands reveal accelerated sediment accumulation over the past few decades, likely due to changes in the thermal state of the glaciers in this region, which straddles the boundary between subpolar and temperate conditions. In Patagonia and Tierra del Fuego, sediment accumulates faster (11–24 mm yr−1), and previously collected seismic profiles show that rates reach meters per year close to the glacier termini. This increase in sediment accumulation rates with decreasing latitude reflects the gradient from subpolar to temperate climates and is consistent with glacial erosion being much faster in the temperate climate of southern Chile than in the polar climate of the Antarctic Peninsula.</abstract><abstract type="short">Sediment accumulation rates measured in temperate to subpolar glacial fjords Accumulation rates in Patagonia are significantly greater than those in Antarctica Steady accumulation during rapid climate change along the Antarctic Peninsula</abstract><note type="funding">National Science Foundation Office of Polar Programs - No. NSF/OPP 03–38137; </note><subject><genre>keywords</genre><topic>sediments</topic><topic>210‐Pb geochronology</topic><topic>glacial erosion</topic><topic>regional warming</topic><topic>Antarctic Peninsula</topic><topic>Patagonia</topic></subject><relatedItem type="host"><titleInfo><title>Journal of Geophysical Research: Earth Surface</title></titleInfo><titleInfo type="abbreviated"><title>J. Geophys. Res. Earth Surf.</title></titleInfo><genre type="journal">journal</genre><subject><genre>index-terms</genre><topic authorityURI="http://psi.agu.org/taxonomy5/0700">CRYOSPHERE</topic><topic authorityURI="http://psi.agu.org/taxonomy5/0720">Glaciers</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1000">GEOCHEMISTRY</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1051">Sedimentary geochemistry</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1100">GEOCHRONOLOGY</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1165">Sedimentary geochronology</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1200">GEODESY AND GRAVITY</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1225">Global change from geodesy</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1600">GLOBAL CHANGE</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1630">Impacts of global change</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4200">OCEANOGRAPHY: GENERAL</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4207">Arctic and Antarctic oceanography</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4300">NATURAL HAZARDS</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4321">Climate impact</topic><topic authorityURI="http://psi.agu.org/taxonomy5/9300">GEOGRAPHIC LOCATION</topic><topic authorityURI="http://psi.agu.org/taxonomy5/9310">Antarctica</topic></subject><subject><genre>article-category</genre><topic>Regular Article</topic></subject><identifier type="ISSN">2169-9003</identifier><identifier type="eISSN">2169-9011</identifier><identifier type="DOI">10.1002/(ISSN)2169-9011</identifier><identifier type="PublisherID">JGRF</identifier><part><date>2013</date><detail type="volume"><caption>vol.</caption><number>118</number></detail><detail type="issue"><caption>no.</caption><number>4</number></detail><extent unit="pages"><start>2072</start><end>2088</end><total>17</total></extent></part></relatedItem><identifier type="istex">47DE47930ECF0D8B706073979DF63AF3F43FE2A8</identifier><identifier type="DOI">10.1002/jgrf.20145</identifier><identifier type="ArticleID">JGRF20145</identifier><accessCondition type="use and reproduction" contentType="copyright">©2013. 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