scholarly journals Photovoltaic Effects in CuPc/C60and ZnPc/C60Depending on the Organic Layer Thickness

2005 ◽  
Vol 6 (3) ◽  
pp. 115-118
Author(s):  
Joon-Ho Ahn ◽  
Joon-Ung Lee ◽  
Won-Jae Lee
Keyword(s):  
Layer Thickness ◽  
Organic Layer ◽  
Photovoltaic Effects

scholarly journals Active Layer Stratigraphy and Organic Layer Thickness at a Thermokarst Site in Arctic Alaska Identified Using Ground Penetrating Radar

2015 ◽  
Vol 47 (2) ◽  
pp. 195-202 ◽  
Author(s):  
Alessio Gusmeroli ◽  
Lin Liu ◽  
Kevin Schaefer ◽  
Tingjun Zhang ◽  
Timothy Schaefer ◽  
...  
Keyword(s):  
Layer Thickness ◽  
Active Layer ◽  
Ground Penetrating Radar ◽  
Organic Layer ◽  
Arctic Alaska ◽  
Ground Penetrating

scholarly journals Effect of Organic Layer Thickness on Black Spruce Aging Mistakes in Canadian Boreal Forests

Forests ◽  
2016 ◽  
Vol 7 (12) ◽  
pp. 69 ◽  
Author(s):  
Ahmed Laamrani ◽  
Annie DesRochers ◽  
Line Blackburn
Keyword(s):  
Layer Thickness ◽  
Boreal Forests ◽  
Black Spruce ◽  
Organic Layer

scholarly journals Short-term and Residual Effects of Laccase Application on Creeping Bentgrass Thatch Layer

HortScience ◽  
2019 ◽  
Vol 54 (9) ◽  
pp. 1610-1620
Author(s):  
Sudeep S. Sidhu ◽  
Qingguo Huang ◽  
Robert N. Carrow ◽  
Paul L. Raymer
Keyword(s):  
Layer Thickness ◽  
Treatment Initiation ◽  
Accumulation Rate ◽  
Creeping Bentgrass ◽  
Residual Effects ◽  
Organic Layer ◽  
Short Term ◽  
Second Year ◽  
Laccase Enzyme ◽  
Application Protocols

Organic layer formation in the form of thatch is a major problem in managed turfgrass systems. Biweekly application of laccase enzyme has been well-documented to facilitate the degradation of thatch and reduce the accumulation rate of organic matter in ‘Crenshaw’ creeping bentgrass (Agrostis stolonifera L.). A field experiment involving creeping bentgrass was conducted to evaluate the residual effects on thatch accumulation after ceasing laccase applications. A significant reduction in thatch layer thickness was observed at 6, 12, and 18 months after treatment initiation when laccase was applied at different rates and frequencies. Residual effects of laccase application were observed for thatch layer thickness, but no additional accumulation of thatch was observed 6 months after treatment cessation. At 18 months after treatment initiation, a significant increase in the thatch layer was observed where treatments had been ceased for 12 months, but no thatch accumulation was observed for laccase treatment for a second 6-month period during the second year. This information is critical to turf practitioners when developing laccase application protocols. Limiting laccase applications for a period of 6 months during 1 year was shown to be effective for thatch control.

Climate warming and active layer thaw in the boreal and tundra environments of the Mackenzie Valley

2007 ◽  
Vol 44 (6) ◽  
pp. 733-743 ◽  
Author(s):  
Ming-ko Woo ◽  
Michael Mollinga ◽  
Sharon L Smith
Keyword(s):  
Layer Thickness ◽  
Active Layer ◽  
Climate Warming ◽  
Probability Distributions ◽  
Organic Layer ◽  
Active Layer Thickness ◽  
Near Surface ◽  
Ground Temperatures ◽  
Thaw Depth ◽  
Mineral Soils

The variability of maximum active layer thickness in boreal and tundra environments has important implications for hydrological processes, terrestrial and aquatic ecosystems, and the integrity of northern infrastructure. For most planning and management purposes, the long-term probability distribution of active layer thickness is of primary interest. A robust method is presented to calculate maximum active layer thickness, employing the Stefan equation to compute phase change of moisture in soils and using air temperature as the sole climatic forcing variable. Near-surface ground temperatures (boundary condition for the Stefan equation) were estimated based on empirical relationships established for several sites in the Mackenzie valley. Simulations were performed for typically saturated mineral soils, overlain with varying thickness of peat in boreal and tundra environments. The probability distributions of simulated maximum active layer thickness encompass the range of measured thaw depths provided by field data. The effects of climate warming under A2 and B2 scenarios for 2050 and 2100 were investigated. Under the A2 scenario in 2100, the simulated median thaw depth under a thin organic cover may increase by 0.3 m, to reach 1 m depth for a tundra site and 1.6 m depth for a boreal site. The median thaw depth in 2100 is dampened by about 50% under a 1 m thick organic layer. Without an insulating organic cover, thaw penetration can increase to reach 1.7 m at the tundra site. The simulations provide quantitative support that future thaw penetration in permafrost terrain will deepen differentially depending on location and soil.

Distribution and landscape controls of organic layer thickness and carbon within the Alaskan Yukon River Basin

Geoderma ◽  
2014 ◽  
Vol 230-231 ◽  
pp. 79-94 ◽  
Author(s):  
Neal J. Pastick ◽  
Matthew Rigge ◽  
Bruce K. Wylie ◽  
M. Torre Jorgenson ◽  
Joshua R. Rose ◽  
...  
Keyword(s):  
Layer Thickness ◽  
River Basin ◽  
Organic Layer ◽  
Yukon River ◽  
Yukon River Basin
Sign in / Sign up

Export Citation Format

Share Document