Vegetation Canopy and Radiation Controls on Permafrost Plateau Evolution within the Discontinuous Permafrost Zone, Northwest Territories, Canada
Identifieur interne : 000070 ( Istex/Curation ); précédent : 000069; suivant : 000071Vegetation Canopy and Radiation Controls on Permafrost Plateau Evolution within the Discontinuous Permafrost Zone, Northwest Territories, Canada
Auteurs : L. Chasmer [Canada] ; W. Quinton [Canada] ; C. Hopkinson [Canada] ; R. Petrone [Canada] ; P. Whittington [Canada]Source :
- Permafrost and Periglacial Processes [ 1045-6740 ] ; 2011-07.
Abstract
This study examines the links between the spatial distribution of three‐dimensional vegetation structural characteristics and historical permafrost plateau area changes using airborne light detection and ranging and aerial photography. The results show that vegetation is prone to reduced canopy fractional cover (by up to 50%) and reduced canopy heights (by 16−30%) at the edges of plateaus. Reduced biomass may cause a positive feedback, whereby diminished within‐ and below‐canopy shadowing (by 1 h of shadow time per day) results in increased radiation incident on the ground surface (16% greater at open‐ vs closed‐canopy plateau sites) and increased longwave radiation losses (74% greater at open‐ vs closed‐canopy plateau sites). Increased incident shortwave radiation may result in augmented thawing of permafrost and increased meltwater runoff, which further inhibits vegetation and permafrost persistence. Edge influences on ground thaw cause vegetation to die over several years (confirmed using historical aerial photography), thereby exacerbating thaw and plateau area reduction (plateau area reduction = ~27% over 60 years). Permafrost degradation is also evidenced by the increasingly fragmented characteristics of the landscape. Copyright © 2011 John Wiley & Sons, Ltd.
Url:
DOI: 10.1002/ppp.724
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: Pour aller vers cette notice dans l'étape Curation :000070
Links to Exploration step
ISTEX:C8A4C07B2E6BC0CD03E487BA537CA9A46E6ABF28Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Vegetation Canopy and Radiation Controls on Permafrost Plateau Evolution within the Discontinuous Permafrost Zone, Northwest Territories, Canada</title>
<author><name sortKey="Chasmer, L" sort="Chasmer, L" uniqKey="Chasmer L" first="L." last="Chasmer">L. Chasmer</name>
<affiliation wicri:level="1"><mods:affiliation>Cold Regions Research Centre, Wilfrid Laurier University, ON, Waterloo, Canada</mods:affiliation>
<country xml:lang="fr">Canada</country>
<wicri:regionArea>Cold Regions Research Centre, Wilfrid Laurier University, ON, Waterloo</wicri:regionArea>
</affiliation>
<affiliation wicri:level="1"><mods:affiliation>E-mail: lechasme@yahoo.ca</mods:affiliation>
<country wicri:rule="url">Canada</country>
</affiliation>
</author>
<author><name sortKey="Quinton, W" sort="Quinton, W" uniqKey="Quinton W" first="W." last="Quinton">W. Quinton</name>
<affiliation wicri:level="1"><mods:affiliation>Cold Regions Research Centre, Wilfrid Laurier University, ON, Waterloo, Canada</mods:affiliation>
<country xml:lang="fr">Canada</country>
<wicri:regionArea>Cold Regions Research Centre, Wilfrid Laurier University, ON, Waterloo</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Hopkinson, C" sort="Hopkinson, C" uniqKey="Hopkinson C" first="C." last="Hopkinson">C. Hopkinson</name>
<affiliation wicri:level="1"><mods:affiliation>Applied Geomatics Research Group, NSCC, NS, Lawrencetown, Canada</mods:affiliation>
<country xml:lang="fr">Canada</country>
<wicri:regionArea>Applied Geomatics Research Group, NSCC, NS, Lawrencetown</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Petrone, R" sort="Petrone, R" uniqKey="Petrone R" first="R." last="Petrone">R. Petrone</name>
<affiliation wicri:level="1"><mods:affiliation>Cold Regions Research Centre, Wilfrid Laurier University, ON, Waterloo, Canada</mods:affiliation>
<country xml:lang="fr">Canada</country>
<wicri:regionArea>Cold Regions Research Centre, Wilfrid Laurier University, ON, Waterloo</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Whittington, P" sort="Whittington, P" uniqKey="Whittington P" first="P." last="Whittington">P. Whittington</name>
<affiliation wicri:level="1"><mods:affiliation>Department of Geography, University of Waterloo, Waterloo, ON, Canada</mods:affiliation>
<country xml:lang="fr">Canada</country>
<wicri:regionArea>Department of Geography, University of Waterloo, Waterloo, ON</wicri:regionArea>
</affiliation>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">ISTEX</idno>
<idno type="RBID">ISTEX:C8A4C07B2E6BC0CD03E487BA537CA9A46E6ABF28</idno>
<date when="2011" year="2011">2011</date>
<idno type="doi">10.1002/ppp.724</idno>
<idno type="url">https://api-v5.istex.fr/document/C8A4C07B2E6BC0CD03E487BA537CA9A46E6ABF28/fulltext/pdf</idno>
<idno type="wicri:Area/Istex/Corpus">000070</idno>
<idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000070</idno>
<idno type="wicri:Area/Istex/Curation">000070</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Vegetation Canopy and Radiation Controls on Permafrost Plateau Evolution within the Discontinuous Permafrost Zone, Northwest Territories, Canada</title>
<author><name sortKey="Chasmer, L" sort="Chasmer, L" uniqKey="Chasmer L" first="L." last="Chasmer">L. Chasmer</name>
<affiliation wicri:level="1"><mods:affiliation>Cold Regions Research Centre, Wilfrid Laurier University, ON, Waterloo, Canada</mods:affiliation>
<country xml:lang="fr">Canada</country>
<wicri:regionArea>Cold Regions Research Centre, Wilfrid Laurier University, ON, Waterloo</wicri:regionArea>
</affiliation>
<affiliation wicri:level="1"><mods:affiliation>E-mail: lechasme@yahoo.ca</mods:affiliation>
<country wicri:rule="url">Canada</country>
</affiliation>
</author>
<author><name sortKey="Quinton, W" sort="Quinton, W" uniqKey="Quinton W" first="W." last="Quinton">W. Quinton</name>
<affiliation wicri:level="1"><mods:affiliation>Cold Regions Research Centre, Wilfrid Laurier University, ON, Waterloo, Canada</mods:affiliation>
<country xml:lang="fr">Canada</country>
<wicri:regionArea>Cold Regions Research Centre, Wilfrid Laurier University, ON, Waterloo</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Hopkinson, C" sort="Hopkinson, C" uniqKey="Hopkinson C" first="C." last="Hopkinson">C. Hopkinson</name>
<affiliation wicri:level="1"><mods:affiliation>Applied Geomatics Research Group, NSCC, NS, Lawrencetown, Canada</mods:affiliation>
<country xml:lang="fr">Canada</country>
<wicri:regionArea>Applied Geomatics Research Group, NSCC, NS, Lawrencetown</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Petrone, R" sort="Petrone, R" uniqKey="Petrone R" first="R." last="Petrone">R. Petrone</name>
<affiliation wicri:level="1"><mods:affiliation>Cold Regions Research Centre, Wilfrid Laurier University, ON, Waterloo, Canada</mods:affiliation>
<country xml:lang="fr">Canada</country>
<wicri:regionArea>Cold Regions Research Centre, Wilfrid Laurier University, ON, Waterloo</wicri:regionArea>
</affiliation>
</author>
<author><name sortKey="Whittington, P" sort="Whittington, P" uniqKey="Whittington P" first="P." last="Whittington">P. Whittington</name>
<affiliation wicri:level="1"><mods:affiliation>Department of Geography, University of Waterloo, Waterloo, ON, Canada</mods:affiliation>
<country xml:lang="fr">Canada</country>
<wicri:regionArea>Department of Geography, University of Waterloo, Waterloo, ON</wicri:regionArea>
</affiliation>
</author>
</analytic>
<monogr></monogr>
<series><title level="j">Permafrost and Periglacial Processes</title>
<title level="j" type="abbrev">Permafrost and Periglac. Process.</title>
<idno type="ISSN">1045-6740</idno>
<idno type="eISSN">1099-1530</idno>
<imprint><publisher>John Wiley & Sons, Ltd</publisher>
<pubPlace>Chichester, UK</pubPlace>
<date type="published" when="2011-07">2011-07</date>
<biblScope unit="volume">22</biblScope>
<biblScope unit="issue">3</biblScope>
<biblScope unit="page" from="199">199</biblScope>
<biblScope unit="page" to="213">213</biblScope>
</imprint>
<idno type="ISSN">1045-6740</idno>
</series>
<idno type="istex">C8A4C07B2E6BC0CD03E487BA537CA9A46E6ABF28</idno>
<idno type="DOI">10.1002/ppp.724</idno>
<idno type="ArticleID">PPP724</idno>
</biblStruct>
</sourceDesc>
<seriesStmt><idno type="ISSN">1045-6740</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass></textClass>
<langUsage><language ident="en">en</language>
</langUsage>
</profileDesc>
</teiHeader>
<front><div type="abstract">This study examines the links between the spatial distribution of three‐dimensional vegetation structural characteristics and historical permafrost plateau area changes using airborne light detection and ranging and aerial photography. The results show that vegetation is prone to reduced canopy fractional cover (by up to 50%) and reduced canopy heights (by 16−30%) at the edges of plateaus. Reduced biomass may cause a positive feedback, whereby diminished within‐ and below‐canopy shadowing (by 1 h of shadow time per day) results in increased radiation incident on the ground surface (16% greater at open‐ vs closed‐canopy plateau sites) and increased longwave radiation losses (74% greater at open‐ vs closed‐canopy plateau sites). Increased incident shortwave radiation may result in augmented thawing of permafrost and increased meltwater runoff, which further inhibits vegetation and permafrost persistence. Edge influences on ground thaw cause vegetation to die over several years (confirmed using historical aerial photography), thereby exacerbating thaw and plateau area reduction (plateau area reduction = ~27% over 60 years). Permafrost degradation is also evidenced by the increasingly fragmented characteristics of the landscape. Copyright © 2011 John Wiley & Sons, Ltd.</div>
</front>
</TEI>
</record>
Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Canada/explor/ParkinsonCanadaV1/Data/Istex/Curation
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000070 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Istex/Curation/biblio.hfd -nk 000070 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien |wiki= Wicri/Canada |area= ParkinsonCanadaV1 |flux= Istex |étape= Curation |type= RBID |clé= ISTEX:C8A4C07B2E6BC0CD03E487BA537CA9A46E6ABF28 |texte= Vegetation Canopy and Radiation Controls on Permafrost Plateau Evolution within the Discontinuous Permafrost Zone, Northwest Territories, Canada }}
![]() | This area was generated with Dilib version V0.6.29. | ![]() |