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RYAN ENGSTROM results 4 · Newest (Page 1/1, per page 25)
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Towards a scalable and transferable approach to map deprived areas using Sentinel-2 images and machine learningNARA Subscribed
Computers, Environment and Urban Systems · 2024 · Vol. 109 · Pergamon
Maxwell Owusu; Arathi Nair; Amir Jafari; Dana Thomson; Monika Kuffer; Ryan Engstrom
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Circumpolar arctic tundra biomass and productivity dynamics in response to projected climate change and herbivoryNARA Subscribed
Global Change Biology · 2017 · Vol. 23 · Issue 9 · Wiley
Qin Yu; Howard Epstein; Ryan Engstrom; Donald Walker
Satellite remote sensing data have indicated a general ‘greening’ trend in the arctic tundra biome. However, the observed changes based on remote sensing are the result of multiple environmental drivers, and the effects of individual controls such as warming, herbivory, and other disturbances on changes in vegetation biomass, community structure, and ecosystem function remain unclear. We apply ArcVeg, an arctic tundra vegetati...
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Spatial refinement of census population distribution using remotely sensed estimates of impervious surfaces in HaitiNARA Subscribed
International Journal of Remote Sensing · 2010 · Vol. 31 · Issue 21 · Taylor & Francis
Derek Azar; Jordan Graesser; Ryan Engstrom; Joshua Comenetz; Robert M. Leddy; Nancy G. Schechtman; Theresa Andrews
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Spatial variation in regional CO 2 exchange for the Kuparuk River Basin, Alaska over the summer growing seasonNARA Subscribed
Global Change Biology · 2003 · Vol. 9 · Issue 6 · Wiley
GEORGE L. VOURLITIS; JOSEPH VERFAILLIE; WALTER C. OECHEL; ALLEN HOPE; DOUGLAS STOW; RYAN ENGSTROM
The spatial and temporal patterns in CO 2 flux for the Kuparuk River Basin, a 9200‐km 2 watershed located in NE Alaska were estimated using the Regional Arctic CO 2 Exchange Simulator (RACES) for the 1994–1995 growing seasons. RACES uses non‐linear models and a Geographical Information System database (GIS) consisting of the normalized difference vegetation index (NDVI) and dynamic temperature and radiation maps. The spatial a...
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