Modern pollen data from the Canadian Arctic, 1972-1973

Area of Science:

• Paleoecology
• Climate Science
• Arctic Ecology

Background:

• Baseline pollen deposition data from 1972-73 in the Canadian Arctic.
• Focus on the arctic tree-line and its potential fluctuations.
• Unique geographical extent for assessing climate change effects.

Purpose of the Study:

• Aid interpretation of Holocene pollen diagrams.
• Assess modern climate change impacts on northern ecosystems.
• Document pollen deposition patterns across diverse arctic landscapes.

Main Methods:

• Repeated sampling along a 3,200 km transect from Boreal Forest to High Arctic (29 interior, 5 coastal sites).
• Utilized static pollen samplers to capture local and long-distance (Boreal Forest) pollen.
• Collected multi-year pollen fallout using moss and lichen polsters for sampler validation.
• Recorded local vegetation at each sampling site.

Main Results:

• Comprehensive dataset of modern pollen deposition across a vast Canadian Arctic transect.
• Data includes site/sample information, raw and processed pollen counts from over 500 samples.
• Established baseline for assessing long-term ecological changes and climate impacts.

Conclusions:

• The collected pollen data serves as a foundational resource for paleoecological reconstructions.
• Provides critical insights into the sensitivity of arctic ecosystems, particularly the tree-line, to climate change.
• Archived data at World Data Center PANGAEA ensures accessibility for future research.