scholarly journals Is the global rise of asthma an early impact of anthropogenic climate change?

2006 ◽  
Vol 11 (3) ◽  
pp. 745-752 ◽  
Author(s):  
Paul John Beggs ◽  
Hilary Jane Bambrick
Keyword(s):  
Climate Change ◽  
Carbon Dioxide ◽  
Atmospheric Carbon Dioxide ◽  
Health Effect ◽  
Carbon Dioxide Concentration ◽  
Anthropogenic Climate Change ◽  
Asthma Incidence ◽  
Pollen Quantity ◽  
Climate Exposure ◽  
Early Health

The increase in asthma incidence, prevalence, and morbidity over recent decades presents a significant challenge to public health. Pollen is an important trigger of some types of asthma, and both pollen quantity and season depend on climatic and meteorological variables. Over the same period as the global rise in asthma, there have been considerable increases in atmospheric carbon dioxide concentration and global average surface temperature. We hypothesize anthropogenic climate change as a plausible contributor to the rise in asthma. Greater concentrations of carbon dioxide and higher temperatures may increase pollen quantity and induce longer pollen seasons. Pollen allergenicity can also increase as a result of these changes in climate. Exposure in early life to a more allergenic environment may also provoke the development of other atopic conditions, such as eczema and allergic rhinitis. Although the etiology of asthma is complex, the recent global rise in asthma could be an early health effect of anthropogenic climate change.

scholarly journals INVESTIGATING THE HISTORICAL CORRELATION BETWEEN ATMOSPHERIC CARBON DIOXIDE CONCENTRATION AND GLOBAL TEMPERATURE CHANGE

2021 ◽  
pp. 5-16
Author(s):  
Kneev Sharma ◽  
Dimitre Karamanev
Keyword(s):  
Climate Change ◽  
Carbon Dioxide ◽  
Temperature Rise ◽  
Atmospheric Carbon Dioxide ◽  
Carbon Dioxide Concentration ◽  
Co2 Concentration ◽  
Global Temperature ◽  
Atmospheric Carbon Dioxide Concentration ◽  
Important Relationship ◽  
Atmospheric Carbon

Understanding the fundamental relationship between atmospheric carbon dioxide concentration and temperature rise is essential for tackling the problem of climate change that faces us today. Misconceptions regarding the relationship are widespread due to media and political influences. This investigation aims to address the popular misconception that CO2 concentration directly and naturally leads to global temperature rise. While anthropogenic CO2 emissions seem to affect the rising global atmospheric temperature with a confidence of 95%, it falters when the historical relationship using ice core data is studied. This investigation uses two statistical approaches to determine an accurate range and direction for this important relationship. Through a combined approach, it was found that historically CO2 concentration in the last 650 000 years lags global temperature rise by 1020-1080 years with a maximum correlation coefficient of 0.8371-0.8372. This result is important for the investigation of climate change.

Potential impact of elevated atmospheric carbon dioxide and climate change on Victorian wheat marketing grades and value

2019 ◽  
Vol 70 (11) ◽  
pp. 926
Author(s):  
Chris J. Korte ◽  
Patrick Wilson ◽  
Brian Kearns ◽  
Glenn J. Fitzgerald ◽  
Joe F. Panozzo ◽  
...  
Keyword(s):  
Climate Change ◽  
Carbon Dioxide ◽  
Atmospheric Carbon Dioxide ◽  
Carbon Dioxide Concentration ◽  
Future Climate ◽  
Wheat Crop ◽  
Yield Reduction ◽  
Elevated Atmospheric Carbon Dioxide ◽  
Potential Impact ◽  
Atmospheric Carbon

The potential impact of elevated atmospheric carbon dioxide concentration ([CO2]) and future climate predicted for 2050 on wheat marketing grades and grain value was evaluated for Victoria, Australia. This evaluation was based on measured grain yield and quality from the Australian Grains FACE program and commercial grain delivery data from Victoria for five seasons (2009–13). Extrapolation of relationships derived from field experimentation under elevated [CO2] to the Victorian wheat crop indicated that 34% of grain would be downgraded by one marketing grade (range 1–62% depending on season and region) because of reduced protein concentration; and that proportions of high-protein wheat grades would reduce and proportions of lower protein grades would increase, with the largest increase in the Australian Standard White (ASW1) grade. Simulation modelling with predicted 2050 [CO2] and future climate indicated reduced wheat yields compared with 2009–13 but higher and lower grain quality depending on region. The Mallee Region was most negatively affected by climate change, with a predicted 43% yield reduction and 43% of grain downgraded by one marketing grade. Using 2016 prices, the value of Victorian wheat grain was influenced mainly by production in the different scenarios, with quality changes in different scenarios having minimal impact on grain value.

scholarly journals Short Review of Climate Change in Support of Greta Thunberg and Fridays for Future

2019 ◽  
Author(s):  
Rainer Walter Kühne
Keyword(s):  
Climate Change ◽  
Carbon Dioxide ◽  
Atmospheric Carbon Dioxide ◽  
Ice Core ◽  
Carbon Dioxide Concentration ◽  
Short Review ◽  
Present Value ◽  
Core Data ◽  
The Past ◽  
Natural Climate

I review the evidence of natural climate change as given by the Greenland ice core data of the past 120,000 years and the Antarctica ice core data of the past 900,000 years. These data show that the atmospheric carbon dioxide concentration newer exceeded 300 ppm (parts per million by volume) during the 650,000 years which preceded AD 1900. Only around 1900 did the concentration reach 300 ppm. Afterwards it increased continuously until the present value of over 400 ppm, where since AD 2000 it increases by 2 ppm per year. I predict that within the next one hundred years the global temperature will increase by further 3.6°C only because of the carbon dioxide concentration that is already at present in the atmosphere.

Communication: Photoinduced Carbon Dioxide Binding with Surface-Functionalized Silicon Quantum Dots

2018 ◽  
Author(s):  
Oscar A. Douglas-Gallardo ◽  
Cristián Gabriel Sánchez ◽  
Esteban Vöhringer-Martinez
Keyword(s):  
Carbon Dioxide ◽  
Quantum Dots ◽  
Atmospheric Carbon Dioxide ◽  
Density Functional ◽  
Tight Binding ◽  
Carbon Dioxide Concentration ◽  
Research Area ◽  
Silicon Quantum Dots ◽  
Dependent Model ◽  
Photoinduced Charge

<div> <div> <div> <p>Nowadays, the search of efficient methods able to reduce the high atmospheric carbon dioxide concentration has turned into a very dynamic research area. Several environmental problems have been closely associated with the high atmospheric level of this greenhouse gas. Here, a novel system based on the use of surface-functionalized silicon quantum dots (sf -SiQDs) is theoretically proposed as a versatile device to bind carbon dioxide. Within this approach, carbon dioxide trapping is modulated by a photoinduced charge redistribution between the capping molecule and the silicon quantum dots (SiQDs). Chemical and electronic properties of the proposed SiQDs have been studied with Density Functional Theory (DFT) and Density Functional Tight-Binding (DFTB) approach along with a Time-Dependent model based on the DFTB (TD-DFTB) framework. To the best of our knowledge, this is the first report that proposes and explores the potential application of a versatile and friendly device based on the use of sf -SiQDs for photochemically activated carbon dioxide fixation. </p> </div> </div> </div>

The rate of dissolution of calcium carbonate from the surface of deep-ocean turbidite sediments

1990 ◽  
Vol 331 (1616) ◽  
pp. 41-49 ◽  
Keyword(s):  
Carbon Dioxide ◽  
Atmospheric Carbon Dioxide ◽  
Bottom Water ◽  
Natural Radionuclide ◽  
Carbon Dioxide Concentration ◽  
Deep Ocean ◽  
Sediment Surface ◽  
Carbonate Sediments ◽  
Sedimentary Record ◽  
Atmospheric Carbon

It is known that past periods of high atmospheric carbon dioxide concentration are associated with poor carbonate preservation in the deep-ocean sedimentary record. Bottom water can become more aggressive towards carbonate sediments during such periods. To interpret the sedimentary record more exactly, and to predict future atmospheric carbon dioxide levels, it is necessary to know the rate of solution of carbonate for a given degree of bottom-water undersaturation. In parts of the Atlantic Ocean, turbidite sedimentation mechanisms have emplaced carbonate-rich material in contact with undersaturated bottom water. The time of the emplacement event can be determined from natural radionuclide distributions, and the degree of carbonate dissolution in this time can be measured. This provides a direct measurement of dissolution rate from a natural sediment surface at a known degree of undersaturation. The range of applicability of the method is explored with a mathematical model, and field data from a 5430 m depth Atlantic site are presented.

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