التفاصيل البيبلوغرافية
| العنوان: |
New Northern Snowpack Classification Linked to Vegetation Cover on a Latitudinal Mega-Transect Across Northeastern Canada |
| المؤلفون: |
Alain Royer, Florent Domine, Alexandre Roy, Alexandre Langlois, Nicolas Marchand, Gautier Davesne |
| المساهمون: |
Alain Royer, Florent Domine, Alexandre Roy, Alexandre Langlois, Nicolas Marchand, Gautier Davesne |
| المصدر: |
https://doi.org/10.1080/11956860.2021.1898775. |
| بيانات النشر: |
Centre d'études nordiques, Université Laval |
| سنة النشر: |
2021 |
| المجموعة: |
BioOne Online Journals |
| مصطلحات موضوعية: |
classification de la couverture de neige, interactions neige-végétation, propriétés de la neige, snow cover classification, snowpack properties, snow–vegetation interaction |
| جغرافية الموضوع: |
world |
| الوصف: |
Changes in mass, extent, duration, and physical properties of snow are key elements for studying associated climate change feedbacks in northern regions. In this study, we analyzed snowpack physical properties along a ‘mega’ transect from 47°N to 83°N (4,000 km) in northeastern Canada, which includes marked transitions between ecozones from boreal forest to subarctic and arctic ecosystems. Our unique dataset of 391 detailed snowpits acquired over the last 20 years, complemented with snow data from weather stations, shows that snowpack properties such as snow water equivalent, snow depth, density, grain size and basal depth hoar fraction (DHF) are strongly linked to vegetation type. Based on these results, we propose an updated classification of snow types in three classes: boreal forest snow (47–58°N), tundra snow (58–74°N) and polar desert snow (74–83°N), which is more appropriate to the study area than the general north hemisphere classification commonly used. We also show that shrub presence along the transect contributes to a significant increase in DHF development which contributes most strongly to the thermal insulation properties of the snowpack. Overall, our analysis suggests that snow–vegetation interactions have a positive feedback effect on warming at northern latitudes. |
| نوع الوثيقة: |
text |
| وصف الملف: |
text/HTML |
| اللغة: |
English |
| DOI: |
10.1080/11956860.2021.1898775 |
| الاتاحة: |
https://doi.org/10.1080/11956860.2021.1898775 |
| Rights: |
All rights reserved. |
| رقم الانضمام: |
edsbas.4335D8A |
| قاعدة البيانات: |
BASE |