Weather, pollution and biotic factors drive net forest – atmosphere exchange of CO2 at different temporal scales in a temperate-zone mixed forest

By Joanna A. Horemans, et al. Highlights • Daytime C sink capacity of the Brasschaat forest increased between 1999 and 2014. • Daytime NEE was most strongly correlated to atmospheric CO2 levels and soil solution pH. • Long term trend in night respiration was strongly correlated to ground water level. • Random variation in day/night NEE 

Continue Reading…

The Role of Agriculture in Ensuring Food Security in Developing Countries: Considerations in the Context of the Problem of Sustainable Food Production

By Karolina Pawlak and Malgorzata Kolodziejczak Abstract Ensuring food security has become an issue of key importance to countries with different degrees of economic development, while the agricultural sector plays a strategic role in improving food availability. The aim of this paper is to identify relationships between the undernourishment scale and selected characteristics describing the 

Continue Reading…

Equilibrium Climate Sensitivity is Over-estimated in a Key CMIP6 Model

Paper ReviewedZhu, J., Poulsen, C.J. and Otto-Bliesner, B.L. 2020. High climate sensitivity in CMIP6 model not supported by paleoclimate. Nature Climate Change 10: 378-379. The magnitude of long-term warming predicted in response to a given rise in atmospheric CO2 defines a model’s equilibrium climate sensitivity (ECS). Over the past four decades, the range of ECS predicted by various versions of 

Continue Reading…

No Need To Panic: Leading Scientists See Little Global Warming In The Works – Due To “Natural Variability”

By P. Gosselin A commentary titled “‘Just don’t panic – also about climate change’” by Prof. Fritz Vahrenholt appearing at German site achgut.com tells us there’s no need for panic with respect to climate change, as leading scientists dial back earlier doomsday projections. No warming until 2050 Vahrenholt claims a negative Atlantic oscillation is ahead of us 

Continue Reading…

Major new paleoclimatology study shows (claims) global warming has upended 6,500 years of cooling

Over the past 150 years, global warming has more than undone the global cooling that occurred over the past six millennia, according to a major study published June 30 in Nature Research’s Scientific Data, “Holocene global mean surface temperature, a multi-method reconstruction approach.” The findings show that the millennial-scale global cooling began approximately 6,500 years ago 

Continue Reading…

Mass spectrometry and climate science. Part II

By Roland Hirsch New technologies in mass spectrometry are advancing research in climate science This is the second of a two-part posting based on a presentation prepared for the American Chemical Society’s National Meeting in March 2020. The meeting was cancelled, but the key points in that presentation (plus a couple of added examples based 

Continue Reading…

The effects of constant and fluctuating elevated pCO2 levels on oxygen uptake rates of coral reef fishes

Highlights • Coral reefs exhibit natural, diel pCO2 fluctuations that are expected to increase. • Few studies have examined effects of fluctuating pCO2 on adult coral reef fishes. • We measured swimming, O2 uptake rates, aerobic scope, and various blood parameters. • Performing under fluctuating pCO2 conditions may be less energetically-costly. • Studies should use 

Continue Reading…

Interactive Effects of CO2 and Temperature on Cassava

Paper ReviewedForbes, S.J., Cernusak, L.A., Northfield, T.D., Gleadow, R.M., Lambert, S. and Cheesman, A.W. 2020. Elevated temperature and carbon dioxide alter resource allocation to growth, storage and defense in cassava (Manihot esculenta). Environmental and Experimental Botany 173: 103997. Cassava (Manihot esculenta) is an important food crop known for its edible roots. According to Forbes et al. (2020), it 

Continue Reading…