Paper ReviewedRahman, M., Islam, M., Gebrekirstos, A. and Bräuning, A. 2020. Disentangling the effects of atmospheric CO2 and climate on intrinsic water-use efficiency in South Asian tropical moist forest trees. Tree Physiology 40: 904-916. Numerous scientific studies have been conducted in both laboratory and field environments to examine the impact of rising atmospheric CO2 on plant water use efficiency
By Colin Goldblatt, Victoria L. McDonald and Kelly E. McCusker Abstract The Sun was dimmer earlier in Earth’s history, but glaciation was rare in the Precambrian: this is the ‘faint young Sun problem’. Most solutions rely on changes to the chemical composition of the atmosphere to compensate via a stronger greenhouse effect, whereas physical feedbacks
For decades, climate change researchers and activists have used dramatic forecasts to attempt to influence public perception of the problem and as a call to action on climate change. These forecasts have frequently been for events that might be called “apocalyptic,” because they predict cataclysmic events resulting from climate change. In a new paper published
By P. Gosselin Looking at NASA’s Vegetation Index data, the news is good: the globe has greened 10% so far this century. That’s good news because we know this ultimately means greater crop production area and forest expansion. Ironically, what many “experts claim to be a huge problem (CO2) is in fact one of the
By Jiao Zhang et al. Abstract In the present study, the effect of high pressure CO2 (HPCD) pretreatment on the browning of reducing sugar-preserved orange peel was evaluated. Fresh orange peel cubes were subjected to different pressures (4, 7.4 and 9 MPa; 31 °C; 20 min). The changes in the browning-related components during the processing
Paper ReviewedFoo, S.A., Koweek, D.A., Munari, M., Gambi, M.C., Byrne, M. and Caldeira, K. 2020. Responses of sea urchin larvae to field and laboratory acidification. Science of the Total Environment 723: 138003, doi.org/10.1016/j.scitoenv.2020.138003. Writing as background for their study, Foo et al. (2020) state that most so-called ocean acidification studies on marine calcifiers “have been conducted in a
During glacial periods, the sea level falls, because vast quantities of water are stored in the massive inland glaciers. To date, however, computer models have been unable to reconcile sea-level height with the thickness of the glaciers. Using innovative new calculations, a team of climate researchers led by the Alfred Wegener Institute has now managed
By Guixian Deng et al. Highlights Methane reforming with O2-containing CO2 can directly use CO2 captured from air as raw material. Ni-based catalysts optimized by CeO2-ZrO2 has smaller Ni particle size and higher Ni dispersion. The interaction among Ni, CeO2 and ZrO2 results in high reforming activity. The optimized Ni-based catalyst owns dual active for methane and CO2 conversion.
The Impact of Carbon Dioxide Concentrations and Low to Adequate Photosynthetic Photon Flux Density on Growth, Physiology and Nutrient Use Efficiency of Juvenile Cacao Genotypes
By Virupax C. Baligar et al. Abstract Cacao (Theobroma cacao L.) was grown as an understory tree in agroforestry systems where it received inadequate to adequate levels of photosynthetic photon flux density (PPFD). As atmospheric carbon dioxide steadily increased, it was unclear what impact this would have on cacao growth and development at low PPFD.
Like its chemical relative carbon dioxide (CO2), nitrous oxide (N2O) is an important greenhouse gas and the dominant ozone-depleting substance emitted in the 21st Century. Consequently, strategies for limiting its emissions and its catalytic decomposition with metals are being developed. A recent study indicates that nitrous oxide can bind to metals similarly to carbon dioxide,