BGS Seminar Series: Time series remote sensing perspectives on the influence of land cover change on ecosystem function: studies in urban and Arctic-Boreal ecosystems

About

Date: 

02/19/2020 - 12:00pm to 02/20/2020 - 11:45am

PI/Speaker: 

Dr. Jonathan Wang
Please join BGS today, Wednesday Feb. 19th, at noon in the Ellison 6th floor conference room (ERI, rm. 6824), for a talk by Dr. Jonathan Wang of UC Irvine:
 
Jonathan Wang
Postdoctoral Scholar at UC Irvine, Dept of Earth System Science
Randerson and Goulden labs
 

Title: Time series remote sensing perspectives on the influence of land cover change on ecosystem function: studies in urban and Arctic-Boreal ecosystems

 

Abstract: Land cover change processes are transforming terrestrial ecosystems across the globe, and accurate characterization of these changes remains a major unknown in Earth science. Since land cover and climate both change simultaneously, characterizing these changes and their impacts on ecosystem function is an essential part of ultimately understanding the feedbacks between climate change and the carbon cycle. Here I will present two modes of rapid ecosystem change – urbanization and Arctic-Boreal disturbances - and what we can learn about them from an ever expanding archive of time series remote sensing data. In Boston, we characterized the spatiotemporal patterns of the urban heat island effect and estimated its impacts on the phenology and carbon flux of urban vegetation. In Arctic-Boreal ecosystems, as part of NASA’s ABoVE project, we characterized land cover change at multi-decadal and continental scales to evaluate the impact that fires, logging, and other disturbances have on northern high-latitude greening trends and biomass stocks.  I will conclude by previewing some preliminary work exploring the extent and rate of fire, management, and drought-induced forest loss in California’s mountains. As the archive of NASA’s Earth Observation satellites continues to expand, time series remote sensing data can be increasingly used to characterize both past and present changes in land cover and ecosystem function.