Temperature Response of Carbon Dioxide Exchange of Cladonia rangiferina from the Wisconsin Pine Barrens, and Comparison with an Alpine Population

1971 ◽  
Vol 86 (1) ◽  
pp. 224 ◽  
Author(s):  
Michael S. Adams
Keyword(s):  
Carbon Dioxide ◽  
Temperature Response ◽  
Carbon Dioxide Exchange ◽  
Pine Barrens ◽  
Alpine Population ◽  
Cladonia Rangiferina

Effects of pretreatment temperature on carbon dioxide exchange in alfalfa

1972 ◽  
Vol 50 (9) ◽  
pp. 1925-1930 ◽  
Author(s):  
C. J. Pearson ◽  
L. A. Hunt
Keyword(s):  
Carbon Dioxide ◽  
Temperature Response ◽  
Day Length ◽  
Carbon Dioxide Exchange ◽  
Response Curves ◽  
Free Atmosphere ◽  
Pretreatment Temperature ◽  
Higher Temperature ◽  
Increasing Temperature ◽  
The Relationship

The temperature response curves for net carbon dioxide exchange are described for plants of cultivars (cvs.) Vernal and Moapa alfalfa (Medicago sativa L.) grown at day/night temperatures of 30/25C and 20/15C, an irradiance of 25 nE cm−2 s−1 (400–700 nm), and a day length of 15.5 h. Net carbon dioxide intake (NCI) of the tops decreased with increasing temperature from 20 mg dm−2 h−1 at 10C to 5 mg dm−2 h−1 at 40C. The nature of the NCI-temperature response curve was affected by pretreatment temperature, with NCI being lower at all temperatures except 10C after growth at 20/15C. Photorespiration, which reached its maximum value at a higher temperature (20–30C) than that required for maximum NCI, accounted for 22% of the gross carbon dioxide intake (net carbon dioxide exchange in an oxygen-free atmosphere) at 10C and 55% at 40C. Pretreatment affected the relationship between net carbon dioxide output (NCO) and temperature, with NCO being higher at 10C but lower at 30C after growth at 20/15C as compared to 30/25C.

scholarly journals Carbon dioxide exchange and biomass productivity of the herbaceous layer of a managed tropical humid savanna ecosystem in western Kenya

2012 ◽  
Vol 6 (4) ◽  
pp. 286-297 ◽  
Author(s):  
G. O. K'Otuto ◽  
D. O. Otieno ◽  
B. Seo ◽  
H. O. Ogindo ◽  
J. C. Onyango
Keyword(s):  
Carbon Dioxide ◽  
Biomass Productivity ◽  
Carbon Dioxide Exchange ◽  
Herbaceous Layer ◽  
Western Kenya ◽  
Humid Savanna

Carbon dioxide exchange of plants in natural environments

1972 ◽  
Vol 38 (3) ◽  
pp. 455-469 ◽  
Author(s):  
Harold A. Mooney
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Exchange ◽  
Natural Environments

scholarly journals The HAMMONIA Chemistry Climate Model: Sensitivity of the Mesopause Region to the 11-Year Solar Cycle and CO2 Doubling

2006 ◽  
Vol 19 (16) ◽  
pp. 3903-3931 ◽  
Author(s):  
H. Schmidt ◽  
G. P. Brasseur ◽  
M. Charron ◽  
E. Manzini ◽  
M. A. Giorgetta ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Solar Cycle ◽  
General Circulation ◽  
Climate Model ◽  
Temperature Response ◽  
Circulation Model ◽  
Max Planck ◽  
Dynamical Processes ◽  
Mesopause Region ◽  
Height Range

Abstract This paper introduces the three-dimensional Hamburg Model of the Neutral and Ionized Atmosphere (HAMMONIA), which treats atmospheric dynamics, radiation, and chemistry interactively for the height range from the earth’s surface to the thermosphere (approximately 250 km). It is based on the latest version of the ECHAM atmospheric general circulation model of the Max Planck Institute for Meteorology in Hamburg, Germany, which is extended to include important radiative and dynamical processes of the upper atmosphere and is coupled to a chemistry module containing 48 compounds. The model is applied to study the effects of natural and anthropogenic climate forcing on the atmosphere, represented, on the one hand, by the 11-yr solar cycle and, on the other hand, by a doubling of the present-day concentration of carbon dioxide. The numerical experiments are analyzed with the focus on the effects on temperature and chemical composition in the mesopause region. Results include a temperature response to the solar cycle by 2 to 10 K in the mesopause region with the largest values occurring slightly above the summer mesopause. Ozone in the secondary maximum increases by up to 20% for solar maximum conditions. Changes in winds are in general small. In the case of a doubling of carbon dioxide the simulation indicates a cooling of the atmosphere everywhere above the tropopause but by the smallest values around the mesopause. It is shown that the temperature response up to the mesopause is strongly influenced by changes in dynamics. During Northern Hemisphere summer, dynamical processes alone would lead to an almost global warming of up to 3 K in the uppermost mesosphere.

Large interannual variability in net ecosystem carbon dioxide exchange of a disturbed temperate peatland

2016 ◽  
Vol 554-555 ◽  
pp. 192-202 ◽  
Author(s):  
Guler Aslan-Sungur ◽  
Xuhui Lee ◽  
Fatih Evrendilek ◽  
Nusret Karakaya
Keyword(s):  
Carbon Dioxide ◽  
Interannual Variability ◽  
Carbon Dioxide Exchange ◽  
Ecosystem Carbon
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