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Zhiqiang Yang

Computer Scientist

Ogden, UT
Contact Zhiqiang Yang


Saarela, Svetlana; Holm, Soren; Healey, Sean P.; Patterson, Paul L.; Yang, Zhiqiang; Andersen, Hans-Erik; Dubayah, Ralph O.; Qi, Wenlu; Duncanson, Laura I; Armston, John D.; Gobakken, Terje; Naesset, Erik; Ekstrom, Magnus; Stahl, Goran , 2022. Comparing frameworks for biomass prediction for the Global Ecosystem Dynamics Investigation
Dubayah, Ralph; Armston, John; Healey, Sean P.; Bruening, Jamis M.; Patterson, Paul L.; Kellner, James R.; Duncanson, Laura; Saarela, Svetlana; Stahl, Goran; Yang, Zhiqiang; Tang, Hao; Blair, J. Bryan; Fatoyinbo, Lola; Goetz, Scott; Hancock, Steven; Hansen, Matthew; Hofton, Michelle; Hurtt, George; Luthcke, Scott , 2022. GEDI launches a new era of biomass inference from space
Witt, Christopher; Davis, Raymond J.; Yang, Zhiqiang; Ganey, Joseph L.; Gutierrez, R. J.; Healey, Sean P.; Hedwall, Shaula; Hoagland, Serra J.; Maes, Ron; Malcolm, Karl; Sanderlin, Jamie S.; Seamans, Mark; Jones, Gavin , 2022. Linking robust spatiotemporal datasets to assess and monitor habitat attributes of a threatened species
Shang, Rong; Zhu, Zhe; Zhang, Junxue; Qiu, Shi; Yang, Zhiqiang; Li, Tian; Yang, Xiucheng , 2022. Near-real-time monitoring of land disturbance with harmonized Landsats 7-8 and Sentinel-2 data
Davis, Raymond J.; Bell, David M.; Gregory, Matthew J.; Yang, Zhiqiang; Gray, Andrew N.; Healey, Sean P.; Stratton, Andrew E. , 2022. Northwest Forest Plan—the first 25 years (1994–2018): status and trends of late-successional and old-growth forests
Davis, Raymond J.; Lesmeister, Damon B.; Yang, Zhiqiang; Hollen, Bruce; Tuerler, Bridgette; Hobson, Jeremy; Guetterman, John; Stratton, Andrew , 2022. Northwest Forest Plan—the first 25 years (1994–2018): status and trends of northern spotted owl habitats
Bullock, Eric; Healey, Sean P.; Yang, Zhiqiang; Houborg, Rasmus; Gorelick, Noel; Tang, Xiaojing; Andrianirina, Carole , 2022. Timeliness in forest change monitoring: A new assessment framework demonstrated using Sentinel-1 and a continuous change detection algorithm
Moris, Jose V; Reilly, Matthew J.; Yang, Zhiqiang; Cohen, Warren B.; Motta, Renzo; Ascol, Davide , 2022. Using a trait‑based approach to assess fire resistance in forest landscapes of the Inland Northwest, USA
Zolkos, Scott; Fiske, Greg; Windholz, Tiffany; Duran, Gabriel; Yang, Zhiqiang; Olenchenko, Vladimir; Faguet, Alexey; Natali, Susan M. , 2021. Detecting and mapping gas emission craters on the Yamal and Gydan Peninsulas, Western Siberia
Lesmeister, Damon B.; Davis, Raymond J.; Sovern, Stan G.; Yang, Zhiqiang , 2021. Northern spotted owl nesting forests as fire refugia: a 30-year synthesis of large wildfires
Bullock, Eric; Healey, Sean P.; Yang, Zhiqiang; Oduor, Phoebe; Gorelick, Noel; Omondi, Steve; Ouko, Edward; Cohen, Warren B. , 2021. Three decades of land cover change in East Africa
Zhu, Zhe; Zhang, Junxue; Yang, Zhiqiang; Aljaddani, Amal H.; Cohen, Warren B.; Qiu, Shi; Zhou, Congliang , 2020. Continuous monitoring of land disturbance based on Landsat time series
Cohen, Warren B.; Healey, Sean P.; Yang, Zhiqiang; Zhu, Zhe; Gorelick, Noel , 2020. Diversity of algorithm and spectral band inputs improves Landsat monitoring of forest disturbance
Betts, Matthew G.; Northrup, Joseph M.; Bailey Guerrero, Jennifer A.; Adrean, Lindsay J.; Nelson, S. Kim; Fisher, Jennifer L.; Gerber, Brian D.; Garcia-Heras, Marie-Sophie; Yang, Zhiqiang; Roby, Daniel D.; Rivers, James W. , 2020. Squeezed by a habitat split: Warm ocean conditions and old-forest loss interact to reduce long-term occupancy of a threatened seabird
Bost, Drew S.; Reilly, Matthew J.; Jules, Erik S.; DeSiervo, Melissa H.; Yang, Zhiqiang; Butz, Ramona J. , 2019. Assessing spatial and temporal patterns of canopy decline across a diverse montane landscape in the Klamath Mountains, CA, USA using a 30-year Landsat time series
Phalan, Benjamin T.; Northrup, Joseph M.; Yang, Zhiqiang; Deal, Robert L.; Rousseau, Josée S.; Spies, Thomas A.; Betts, Matthew G. , 2019. Impacts of the northwest forest plan on forest composition and bird populations
Gray, Andrew N.; Cohen, Warren B.; Yang, Zhiqiang; Pfaff, Eric , 2019. Integrating TimeSync disturbance detection and repeat forest inventory to predict carbon flux
Betts, Matthew G.; Illan, Javier Gutierrez; Yang, Zhiqiang; Shirley, Susan M.; Thomas, Chris D. , 2019. Synergistic effects of climate and land-cover change on long-term bird population trends of the western USA: A test of modeled predictions
Northrup, Joseph M.; Rivers, James W.; Yang, Zhiqiang; Betts, Matthew G. , 2019. Synergistic effects of climate and land‐use change influence broad‐scale avian population declines
Halstead, Katherine E.; Alexander, John D.; Hadley, Adam S.; Stephens, Jaime L.; Yang, Zhiqiang; Betts, Matthew G. , 2019. Using a species-centered approach to predict bird community responses to habitat fragmentation
Zhao, Feng; Huang, Chengquan; Goward, Samuel N.; Schleeweis, Karen G.; Rishmawi, Khaldoun; Lindsey, Mary A.; Denning, Elaine; Keddell, Louis; Cohen, Warren B.; Yang, Zhiqiang; Dungan, Jennifer L.; Michaelis, Andrew , 2018. Development of Landsat-based annual US forest disturbance history maps (1986-2010) in support of the North American Carbon Program (NACP)
Arellano-Perez, Stefano; Castedo-Dorado, Fernando; Lopez-Sanchez, Carlos Antonio; Gonzalez-Ferreiro, Eduardo; Yang, Zhiqiang; Díaz-Varela, Ramon Alberto; Alvarez-Gonzalez, Juan Gabriel; Vega, Jose Antonio; Ruiz-Gonzalez, Ana Daria. , 2018. Potential of Sentinel-2A data to model surface and canopy fuel characteristics in relation to crown fire hazard
Cohen, Warren B.; Yang, Zhiqiang; Stehman, Stephen V; Schroeder, Todd A.; Bell, David M.; Masek, Jeffrey G.; Huang, Chengquan; Meigs, Garrett W. , 2016. Forest disturbance across the conterminous United States from 1985-2012: The emerging dominance of forest decline
Map showing three hotspots
Population growth rates in Sub-Saharan East Africa are among the highest in the world, which is increasing pressure for land cover conversion. We investigated land cover trends in collaboration with experts from seven East African countries and through a series of data collection and technology transfer workshops. Our results show that between 1988 and 2017 the area of cropland and settlements grew by 35% and 44%, respectively, displacing over 18 million hectares of natural land and resulting in a vast reduction in woody vegetation. 
Researchers and managers have partnered to create cutting-edge, high-resolution, high-accuracy maps of Mexican spotted owl habitat - as well as long-term habitat trends - that can be updated annually as new data become available. An interactive Google Earth Engine experimental app allows end-users to explore mapped products. 
Storage of atmospheric carbon is an important ecosystem service of healthy forests and woodlands because it mitigates the effects of anthropogenic greenhouse gas emissions. International reporting of this service places a premium on the specificity and precision of monitoring data used to estimate carbon storage or emission. An inventory of land cover change is a critical component of most national-level accounting systems, and the Landsat series of satellites is a uniquely positioned to provide this land cover change “activity data.” In Eastern Africa, there are already high-quality Landsat-based cover maps for 2 or 3 points in time. However, these maps do not provide the annual land cover change information needed for higher-tier IPCC reporting, and land cover changes inferred from independent maps at different dates cannot easily be assigned a level of uncertainty.
Rocky Mountain Research Station (RMRS) scientists have been at the forefront of efforts to understand the ecology of the threatened Mexican spotted owls (Strix occidentalis lucida) for more than 25 years. These scientists and their cooperators have produced most of the existing scientific information on this species. Today, RMRS scientists continue to be actively involved in developing new knowledge on this owl, synthesizing existing information, and working with managers to integrate habitat requirements for the owl and its important prey species into land management plans.
NASA just released the first global biomass map resulting from the Global Ecosystem Dynamics Investigation (GEDI) mission. The new map uses 120 weeks of laser canopy height measurements from around the world. RMRS scientists led development of GEDI’s innovative biomass estimation methods.