The Interaction of Elevated CO2, Drought and UV-B Stress on Maize

Paper Reviewed Wijewardana, C., Henry, W.B., Gao, W. and Reddy, K.R. 2016. Interactive effects of CO2, drought, and ultraviolet-B radiation on maize growth and development. Journal of Photochemistry & Photobiology, B: Biology 160: 198-209. Introducing their important new work, Wijewardana et al. (2016) write that maize (Zea mays) “is the third most important agricultural crop 

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Indirect Effects of Rising CO2 Levels on Ecosystems More Important than Previously Thought

The indirect effects of rising atmospheric carbon dioxide (CO2) levels, such as changes in soil moisture and plant structure, can have a bigger impact on ecosystems than previously thought. Understanding the importance of these indirect effects, in comparison to the direct effects, will improve our understanding of how ecosystems respond to climate change. A study, 

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No Access Observed and simulated fingerprints of multidecadal climate variability, and their contributions to periods of global SST stagnation.

By Monika J. Barcikowska1,*, Thomas R. Knutson2, and Rong Zhang2 1 Princeton University, Princeton, NJ 08544. 2 Geophysical Fluid Dynamics Laboratory/NOAA, Princeton, NJ 08544 This study investigates spatio-temporal features of multidecadal climate variability, using observations and climate model simulation. Aside from a long-term warming trend, observational SST and atmospheric circulation records are dominated by a 

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Plant growth responses to elevated atmospheric CO2 are increased by phosphorus sufficiency but not by arbuscular mycorrhizas

By Iver Jakobsen et al. Capturing the full growth potential in crops under future elevated CO2 (eCO2) concentrations would be facilitated by improved understanding of eCO2 effects on uptake and use of mineral nutrients. This study investigates interactions of eCO2, soil phosphorus (P), and arbuscular mycorrhizal (AM) symbiosis in Medicago truncatula and Brachypodium distachyon grown 

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18 New Papers Link High Solar Activity To Medieval And Modern Warmth, Low Solar Activity To Little Ice Age Cooling

By Kenneth Richard It is generally accepted that the climate warms during periods of strong solar activity (e.g., the Medieval Warm Period) and cools during periods of low solar activity (e.g., the Little Ice Age).” —Lyu et al., 2016 Within the last 1,000 years, global-scale surface temperatures underwent a warm period during Medieval times, centennial-scale 

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The Case Against a U.S. Carbon Tax

By Robert P. Murphy, Patrick J. Michaels, and Paul C. “Chip” Knappenberger Some proponents of federal policies to combat climate change are arguing for a federal carbon tax (or similar type of “carbon price”). Within conservative and libertarian circles, some proponents claim that a revenue-neutral carbon tax “swap” could deliver a double dividend, reducing climate 

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CO2 and greening observations indicate increasing light-use efficiency in northern terrestrial ecosystems

By Rebecca T. Thomas et al. Abstract. Observations show an increasing amplitude in the seasonal cycle of CO2 (ASC) north of 45° N of 56 ± 9.8% over the last 50 years and an increase in vegetation greenness of 7.5-15% in high northern latitudes since the 1980’s. However the causes of these changes remain uncertain. Historical 

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