Mass and energy exchanges over a black spruce forest during key periods of BOREAS 1994

1997 ◽  
Vol 102 (D24) ◽  
pp. 28967-28975 ◽  
Author(s):  
E. Pattey ◽  
R. L. Desjardins ◽  
G. St-Amour
Keyword(s):  
Black Spruce ◽  
Spruce Forest ◽  
Energy Exchanges

Seasonal variation of carbon dioxide, water vapor, and energy exchanges of a boreal black spruce forest

1997 ◽  
Vol 102 (D24) ◽  
pp. 28953-28966 ◽  
Author(s):  
P. G. Jarvis ◽  
J. M. Massheder ◽  
S. E. Hale ◽  
J. B. Moncrieff ◽  
M. Rayment ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Seasonal Variation ◽  
Water Vapor ◽  
Black Spruce ◽  
Spruce Forest ◽  
Energy Exchanges

scholarly journals A long-term record of carbon exchange in a boreal black spruce forest: means, responses to interannual variability, and decadal trends

2007 ◽  
Vol 13 (3) ◽  
pp. 577-590 ◽  
Author(s):  
ALLISON L. DUNN ◽  
CAROL C. BARFORD ◽  
STEVEN C. WOFSY ◽  
MICHAEL L. GOULDEN ◽  
BRUCE C. DAUBE
Keyword(s):  
Interannual Variability ◽  
Black Spruce ◽  
Spruce Forest ◽  
Carbon Exchange

Net Ecosystem Production of Two Contrasting Boreal Black Spruce Forest Communities

Ecosystems ◽  
2003 ◽  
Vol 6 (3) ◽  
pp. 248-260 ◽  
Author(s):  
Kari E. B. O'Connell ◽  
Stith T. Gower ◽  
John M. Norman
Keyword(s):  
Black Spruce ◽  
Net Ecosystem Production ◽  
Spruce Forest ◽  
Forest Communities ◽  
Ecosystem Production

scholarly journals Study of Fuel-Smoke Dynamics in a Prescribed Fire of Boreal Black Spruce Forest through Field-Deployable Micro Sensor Systems

Fire ◽  
2020 ◽  
Vol 3 (3) ◽  
pp. 30
Author(s):  
Quamrul Huda ◽  
David Lyder ◽  
Marty Collins ◽  
Dave Schroeder ◽  
Dan K. Thompson ◽  
...  
Keyword(s):  
Prescribed Fire ◽  
Half Life ◽  
Black Spruce ◽  
Wildland Fire ◽  
Near Field ◽  
Balance Model ◽  
Sensor Systems ◽  
Spruce Forest ◽  
Combustion Dynamics ◽  
Micro Sensor

Understanding the combustion dynamics of fuels, and the generation and propagation of smoke in a wildland fire, can inform short-range and long-range pollutant transport models, and help address and mitigate air quality concerns in communities. Smoldering smoke can cause health issues in nearby valley bottoms, and can create hazardous road conditions due to low-visibility. We studied near-field smoke dynamics in a prescribed fire of 3.4 hectares of land in a boreal black spruce forest in central Alberta. Smoke generated from the fire was monitored through a network of five field-deployable micro sensor systems. Sensors were placed within 500–1000 m of the fire area at various angles in downwind. Smoke generated from flaming and smoldering combustions showed distinct characteristics. The propagation rates of flaming and smoldering smoke, based on the fine particulate (PM2.5) component, were 0.8 and 0.2 m/s, respectively. The flaming smoke was characterized by sharp rise of PM2.5 in air with concentrations of up to 940 µg/m3, followed by an exponential decay with a half-life of ~10 min. Smoldering combustion related smoke contributed to PM2.5 concentrations above 1000 µg/m3 with slower decay half-life of ~18 min. PM2.5 emissions from the burn area during flaming and smoldering phases, integrated over the combustion duration of 2.5 h, were ~15 and ~16 kilograms, respectively, as estimated by our mass balance model.

Comparison of Net Primary Production and Light-use Dynamics of Two Boreal Black Spruce Forest Communities

Ecosystems ◽  
2003 ◽  
Vol 6 (3) ◽  
pp. 236-247 ◽  
Author(s):  
Kari E. B. O'Connell ◽  
Stith T. Gower ◽  
John M. Norman
Keyword(s):  
Primary Production ◽  
Black Spruce ◽  
Net Primary Production ◽  
Spruce Forest ◽  
Forest Communities

Vegetation–soil relationships along a spruce forest transect in interior Alaska

1979 ◽  
Vol 57 (23) ◽  
pp. 2644-2656 ◽  
Author(s):  
C. T. Dyrness ◽  
D. F. Grigal
Keyword(s):  
Forest Floor ◽  
Narrow Band ◽  
Black Spruce ◽  
White Spruce ◽  
Spruce Forest ◽  
Forest Communities ◽  
Soil Series ◽  
Highly Correlated ◽  
Forest Transect ◽  
Upper Slope

Five distinct forest communities were recognized along a 3-km transect. These are, listed in order of decreasing elevation: (i) open black spruce/feathermoss - Cladonia, (ii) closed black spruce/feathermoss, (iii) open black spruce/Sphagnum, (iv) black spruce woodland/Eriophorum, and (v) white spruce/alder/Calamagrostis (restricted to a narrow band adjacent to a stream). Several techniques of ordination were used to recognize these five forest communities plus two intergrades: (open black spruce/feathermoss - Cladonia) - (Sphagnum) and open black spruce/Sphagnum - woodland/Eriophorum.The distribution of two-thirds of the plant species was highly correlated with vegetation–slope zones. Results of the fit of Gaussian curves also suggest that vegetation boundaries were well placed. The distribution of the four soil series in the area was well correlated with vegetation–slope zones: three were limited to one zone each. Permafrost, absent from the soil on the ridgetop and upper slope, was generally within 40 to 50 cm of the surface elsewhere and tended to be at shallower depths as elevation decreased. The most striking differences in forest floor properties were found in the white spruce zone compared with the six black spruce dominated zones. The white spruce forest floor was markedly thinner and had higher levels of nutrients. In the six black spruce dominated zones, forest floor thickness and concentrations of N and Mg tended to increase with distance downslope, and P and K decreased.

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