Capability of the Canapi algorithm to derive shrub structural parameters from satellite imagery in the Alaskan Arctic
Bibliographic Data
| ID | 9219987 |
|---|---|
| Authors | Rocio R Duchesne (0000-0001-9874-8882, University of Wisconsin–Whitewater), Mark Chopping (0000-0001-9622-2772, Montclair State University), Mark J Chopping, Ken D Tape (0000-0002-1039-6868, University of Alaska Fairbanks) |
| Year | 2016 |
| Volume | 52 |
| Issue | 2 |
| Pages | 124-133 |
| Publication date | 2016-03-01 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Polar Record (JOURNAL) |
| Journal identifiers | ISSN: 0032-2474 • E-ISSN: 1475-3057 |
| Publisher | Cambridge University Press (CUP) (PUBLISHER) |
| DOI | 10.1017/s0032247415000509 |
| OpenAlex | W2263245762 |
| Language | EN |
| References cited | 38 |
The observed greening of Arctic vegetation and the expansion of shrubs in the last few decades probably have profound implications for the tundra ecosystem, including feedbacks to climate. Uncertainty surrounding this vegetation shift and its implications calls for monitoring of vegetation structural parameters, such as fractional cover of shrubs. In this study, CANAPI, a semi-automated image interpretation algorithm that identifies and traces crowns by locating its crescent-shaped sunlit portion, was evaluated for its ability to derive structural data for tall (> 0.5 m) shrubs in the Arctic. CANAPI estimates of shrub canopy parameters were obtained from high-resolution imagery at 26 sites (250 m x 250 m each) by adjusting the algorithm's parameters and filter settings for each site, such that the number of crowns delineated by CANAPI roughly matched those observed in the high-resolution imagery. The CANAPI estimates were then compared with field measurements to evaluate the algorithm's performance. CANAPI successfully retrieved fractional cover (R 2 = 0.83, P 2 = 0.81, P 2 = 0.54, P
Algorithm · Arctic · Geography · Physical geography · Remote sensing · Shrub · Tundra · Vegetation (pathology) · Climate change and permafrost · Cryospheric studies and observations · Ecology · Environmental Science · Geology · Geology and Paleoclimatology Research · Mathematics · Oceanography
Late Quaternary History of Tundra Vegetation in Northwestern Alaska
Evidence and Implications of Recent Climate Change in Northern Alaska and Other Arctic Regions
Increased plant growth in the northern high latitudes from 1981 to 1991
Russian Arctic warming and ‘greening’ are closely tracked by tundra shrub willows
Increasing shrub abundance in the Arctic
The evidence for shrub expansion in Northern Alaska and the Pan‐Arctic
Role of Land-Surface Changes in Arctic Summer Warming
The response of Arctic vegetation to the summer climate
Does NDVI reflect variation in the structural attributes associated with increasing shrub dominance in arctic tundra
Shrub expansion in tundra ecosystems
A boreal invasion in response to climate change? Range shifts and community effects in the borderland between forest and tundra
| Citation velocity | historical |
|---|---|
| Highly cited | No |