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climate changephysical sciences
permafrost
tree rings
ice wedges
Holocene
fire
dendrochronology
tree ring
mercury
ancient plants
stable isotopes
4 Dossier(s) trouvé(s) pour le chercheur principal "Porter, Trevor" (les projets pluriannuels sont regroupés):
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Long-term changes in climate and fire activity in the Mackenzie Delta region
chercheur principal: Porter, Trevor
Année(s) de permis: 2023 2022
Résumé: This licence has been issued for the scientific research application No.5487. During the 2022 field season, the main objectives are to collect tree-ring and wedge-ice samples that will be studied to better understand changes in climate over the last 11,700 years and to identify lake sites that will be suitable for lake-sediment coring in the early spring field season. This fieldwork will focus ...
Année(s) de permis: 2023 2022
Résumé: This licence has been issued for the scientific research application No.5487. During the 2022 field season, the main objectives are to collect tree-ring and wedge-ice samples that will be studied to better understand changes in climate over the last 11,700 years and to identify lake sites that will be suitable for lake-sediment coring in the early spring field season. This fieldwork will focus ...
A 2,000 year record of climate change from white spruce tree-rings
chercheur principal: Porter, Trevor
Année(s) de permis: 2019
Résumé: This fieldwork aims to collect ‘disk’ samples from dead trees found on the surface or partially buried in sediments. Previous research in the Campbell Dolomite Upland area reported deadwood samples dating back to AD 1060. This area is well-drained, which is the ideal environment for preserving deadwood over long periods. The research team will return to this area to search for older specimens dati...
Année(s) de permis: 2019
Résumé: This fieldwork aims to collect ‘disk’ samples from dead trees found on the surface or partially buried in sediments. Previous research in the Campbell Dolomite Upland area reported deadwood samples dating back to AD 1060. This area is well-drained, which is the ideal environment for preserving deadwood over long periods. The research team will return to this area to search for older specimens dati...
Long-term reconstructions of cold-season climate and atmospheric Hg deposition from ice wedges in the Mackenzie Delta region
chercheur principal: Porter, Trevor
Année(s) de permis: 2017
Résumé: This purpose of this research is to better understand long-term changes in winter temperatures and atmospheric mercury (Hg) in the Mackenzie Delta area over the last 11,700 years, a period known as the Holocene. The fieldwork aims to sample 20-30 ice wedges that represent a range of Holocene time. Precipitation stable hydrogen isotopes (a temperature proxy) and elemental Hg archived in the wedge i...
Année(s) de permis: 2017
Résumé: This purpose of this research is to better understand long-term changes in winter temperatures and atmospheric mercury (Hg) in the Mackenzie Delta area over the last 11,700 years, a period known as the Holocene. The fieldwork aims to sample 20-30 ice wedges that represent a range of Holocene time. Precipitation stable hydrogen isotopes (a temperature proxy) and elemental Hg archived in the wedge i...
Water and leaf wax isotopes in permafrost
chercheur principal: Porter, Trevor
Année(s) de permis: 2014
Résumé: The primary objectives of this research project are to collect frozen core samples from the top of permafrost and soil from the active layer. Boreal sites will be targeted. The stable isotope compositions of ice and leaf waxes from the samples will be measured. Samples collected from NWT will be added to a much larger Yukon dataset, and the relations between regional climate and the proxies will b...
Année(s) de permis: 2014
Résumé: The primary objectives of this research project are to collect frozen core samples from the top of permafrost and soil from the active layer. Boreal sites will be targeted. The stable isotope compositions of ice and leaf waxes from the samples will be measured. Samples collected from NWT will be added to a much larger Yukon dataset, and the relations between regional climate and the proxies will b...
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