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Thermal Imaging In Plant And Ecosystem Ecology: Applications And Challenges

by Christopher Still - May 20, 2021

Temperature is a primary environmental control on ecological systems and processes at a range of spatial and temporal scales. The surface temperature of organisms is often more relevant for ecological… More

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Imaging Canopy Temperature: Shedding (Thermal) Light On Ecosystem Processes

by Christopher Still - May 20, 2021

Canopy temperature Tcan is a key driver of plant function that emerges as a result of interacting biotic and abiotic processes and properties. However, understanding controls on Tcan and forecasting… More

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Greenness Indices From Digital Cameras Predict The Timing And Seasonal Dynamics Of Canopy-Scale Photosynthesis

by W. Stephen Chan - November 7, 2019

The proliferation of digital cameras co‐located with eddy covariance instrumentation provides new opportunities to better understand the relationship between canopy phenology and the seasonality of canopy photosynthesis. In this paper… More

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Does Vapor Pressure Deficit Drive The Seasonality Of δ13C Of The Net Land-Atmosphere Co2 Exchange Across The United States?

by W. Stephen Chan - November 7, 2019

The seasonal pattern of the carbon isotope content (δ13C) of atmospheric CO2 depends on local and nonlocal land‐atmosphere exchange and atmospheric transport. Previous studies suggested that the δ13C of the… More

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Ecosystem Fluxes Of Carbonyl Sulfide In An Old-Growth Forest: Temporal Dynamics And Responses To Diffuse Radiation And Heat Waves

by - December 24, 2018

Carbonyl sulfide (OCS) has recently emerged as a tracer for terrestrial carbon uptake. While physiological studies relating OCS fluxes to leaf stomatal dynamics have been established at leaf and branch… More

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Large Uptake Of Atmospheric Ocs Observed At A Moist Old Growth Forest: Controls And Implications For Carbon Cycle Applications

by - December 24, 2018

Diurnal and vertical patterns of carbonyl sulfide (OCS) and CO2 mixing ratios above and within a 60‐m‐tall old‐growth temperate forest are presented. Canopy air from four different heights was sampled… More

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Temporal Dynamics Of Aerodynamic Canopy Height Derived From Eddy Covariance Momentum Flux Data Across North American Flux Networks

by Housen Chu - October 4, 2018

Aerodynamic canopy height (ha) is the effective height of vegetation canopy for its influence on atmospheric fluxes and is a key parameter of surface‐atmosphere coupling. However, methods to estimate ha… More

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Radiocarbon-based partitioning of soil respiration in an old-growth coniferous forest

by Sonia Wharton - February 17, 2017

Temperate forests play an important role in the global carbon cycle, and are thought to currently be a sink for atmospheric CO2. However,we lack understanding of the drivers of forest… More

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Is soil respiration a major contributor to the carbon budget within a Pacific Northwest old-growth forest?

by Sonia Wharton - February 17, 2017

Carbon dioxide (CO2) exchange was measured above the forest floor of a temperate Douglas-fir (Pseudotsuga menziesii (Mirbel) Franco) and Western Hemlock (Tsuga heterophylla (Raf.) Sarg.) old-growth forest in southern Washington… More

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Stand-level gas-exchange responses to seasonal drought in very young versus old Douglas-fir forests of the Pacific Northwest

by Sonia Wharton - February 17, 2017

This study examines how stand age affects ecosystem mass and energy exchange response to seasonal drought in three adjacent Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) forests. The sites include two early… More

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