scholarly journals A link between physical and chemical climate change: the enhancement of vegetative water loss by atmospheric aerosols

2018 ◽  
Vol 219 (1) ◽  
pp. 9-11 ◽  
Author(s):  
Arthur H. Chappelka ◽  
Howard S. Neufeld
Keyword(s):  
Climate Change ◽  
Atmospheric Aerosols ◽  
Water Loss ◽  
Chemical Climate ◽  
Physical And Chemical

A strategy for the regional analysis of the effects of physical and chemical climate change on biogeochemical cycles in northeastern (U.S.) forests

1993 ◽  
Vol 67 (1) ◽  
pp. 37-47 ◽  
Author(s):  
John D. Aber ◽  
Charles Driscoll ◽  
C.Anthony Federer ◽  
Richard Lathrop ◽  
Gary Lovett ◽  
...  
Keyword(s):  
Climate Change ◽  
Regional Analysis ◽  
Biogeochemical Cycles ◽  
Chemical Climate ◽  
Physical And Chemical

Back to the Future: Reducing Atmospheric Particulate Matter Levels to Improve Human Health

2021 ◽  
Author(s):  
Spyros Pandis
Keyword(s):  
Particulate Matter ◽  
Atmospheric Aerosols ◽  
Atmospheric Chemistry ◽  
Control Strategy ◽  
Atmospheric Particulate Matter ◽  
Anthropogenic Emissions ◽  
The Us ◽  
Negative Impacts ◽  
Predictive Understanding ◽  
Physical And Chemical

<p>The human development of our planet has a variety of negative impacts on the composition of its atmosphere at every scale – locally, regionally, and even globally. One of these dramatic changes has been the increase in the mass concentrations of sub-micrometer particles by one to sometimes two orders of magnitude over populated areas in the Northern Hemisphere. These atmospheric aerosols can cause serious health problems, reduce visibility, contribute to acidic deposition and material damage, but are also cooling the planet by reflecting sunlight back to space. Atmospheric chemistry occurs within a fabric of complicated atmospheric dynamics and physics. This interplay often results in nonlinear and often counterintuitive changes of the system when anthropogenic emissions change. A major goal of our research has been to gain a predictive understanding of the physical and chemical processes that govern the dynamics, size, and chemical composition of atmospheric aerosols.</p><p>To illustrate the advances in the experimental techniques and theoretical tools in atmospheric aerosol science, we will go back to the beginning of the 21<sup>st</sup> century and we will revisit the design a particulate matter control strategy for the Eastern US based on the data, knowledge, and tools available at that time. We will then look at the effects of the parts of this control strategy that have been materialized and their effects on public health using the current understanding. Finally, we will look forward in ways of further improving air quality in the US and Europe.</p>

Investigating the effects of climate change on structural resistance and actions

2021 ◽  
Author(s):  
Andre Orcesi ◽  
Emilio Bastidas-Arteaga ◽  
Olga Markogiannaki ◽  
Yue Li ◽  
Franck Schoefs ◽  
...  
Keyword(s):  
Climate Change ◽  
Climate Variability ◽  
Natural Hazards ◽  
Extreme Events ◽  
Performance Indicator ◽  
Design Life ◽  
Structural Durability ◽  
Structural Resistance ◽  
Physical And Chemical ◽  
Life Function

<p>One major issue when considering the effects of climate change is to understand, qualify and quantify how natural hazards and the changing climate will likely impact infrastructure assets and services as it strongly depends on current and future climate variability, location, asset design life, function and condition. So far, there is no well-defined and agreed performance indicator that isolates the effects of climate change for structures. Rather, one can mention some key considerations on how climate change may produce changes of vulnerability due to physical and chemical actions affecting structural durability or changes of the exposure in terms of intensity/frequency of extreme events. This paper considers these two aspects and associated challenges, considering some recent activities of members of the IABSE TG6.1.</p>

scholarly journals Grapevine berry shrivelling, water loss and cell death: an increasing challenge for growers in the context of climate change

2021 ◽  
Author(s):  
Alain Deloire ◽  
Suzy Rogiers ◽  
Katja Šuklje ◽  
Guillaume Antalick ◽  
Xiao Zeyu ◽  
...  
Keyword(s):  
Climate Change ◽  
Cell Death ◽  
Economic Impact ◽  
Water Loss ◽  
Water Budget ◽  
Heat Waves ◽  
Grape Berry ◽  
Back Flow ◽  
Grapevine Berry ◽  
Berry Composition

Late ripening berry dehydration is an important phenomenon that occurs through grape berry water loss due to the alteration of the fruit water budget when transpiration and potential water back flow to the plant exceed the import of water into the berry through the phloem and xylem. Berry shrivelling can have a significant economic impact, reducing yields by ≥25 % with consequences on berry composition and the resulting wine. Its occurrence and consequences are expected to increase due to predicted climate change, shifting grape development and ripening into warmer periods (i.e., heat waves and drought events).

scholarly journals The Photocatalytic Activity of Cement in Reducing Air Pollutants

2019 ◽  
Vol 8 (6S3) ◽  
pp. 1422-1424
Keyword(s):  
Climate Change ◽  
Air Pollution ◽  
Global Warming ◽  
Photocatalytic Activity ◽  
Ion Chromatography ◽  
Air Pollutants ◽  
Experimental Conditions ◽  
Open Environment ◽  
Physical And Chemical ◽  
The Ideal

Air pollution is the major concern in the recent years because of causing imbalance to the ecosystem and also increases global warming and climate change. This paper, tries to investigate the applicability of photo catalytic cement in removing the pollutants under partially controlled and simpler experimental conditions such that it mimics the ideal state of its use, that is the natural open environment where it always is susceptible to complex physical and chemical interactions. It also gives an overview of the concentrations of the contaminants reduced not limiting to NOx residues alone, by employing Ion Chromatography instead of NOx analyzers.

scholarly journals Climate Change and Aerosol Sciences

2021 ◽  
pp. 1-13
Author(s):  
Kehan Li
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Particulate Matter ◽  
Environmental Policy ◽  
Solar Radiation ◽  
Greenhouse Gases ◽  
Atmospheric Aerosols ◽  
Environmental Policies ◽  
Modern Times

Climate change is of great importance in modern times and global warming is considered as a significant part of climate change. It is proved that human’s emissions such as greenhouse gases are one of the main sources of global warming (IPCC, 2018). Apart from greenhouse gases, there is another kind of matter being released in quantity via emissions from industries and transportations and playing an important role in global warming, which is aerosol. However, atmospheric aerosols have the net effect of cooling towards global warming. In this paper, climate change with respect to global warming is briefly introduced and the role of aerosols in the atmosphere is emphasized. Besides, properties of aerosols including dynamics and thermodynamics of aerosols as well as interactions with solar radiation are concluded. In the end, environmental policies and solutions are discussed. Keywords: Climate change, Global warming, Atmospheric aerosols, Particulate matter, Radiation, Environmental policy.

Future building water loss projections posed by climate change

2011 ◽  
Vol 2011 (1) ◽  
pp. 1-20 ◽  
Author(s):  
Ola Haug ◽  
Xeni K. Dimakos ◽  
Jofrid F. Vårdal ◽  
Magne Aldrin ◽  
Elisabeth Meze-Hausken
Keyword(s):  
Climate Change ◽  
Water Loss

scholarly journals An Overview of Dynamic Heterogeneous Oxidations in the Troposphere

Environments ◽  
2018 ◽  
Vol 5 (9) ◽  
pp. 104 ◽  
Author(s):  
Elizabeth Pillar-Little ◽  
Marcelo Guzman
Keyword(s):  
Atmospheric Aerosols ◽  
Atmospheric Transport ◽  
Cloud Condensation Nuclei ◽  
Complex Mixture ◽  
Organic Aerosols ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
The Impact ◽  
And Chemical Properties

Due to the adverse effect of atmospheric aerosols on public health and their ability to affect climate, extensive research has been undertaken in recent decades to understand their sources and sinks, as well as to study their physical and chemical properties. Atmospheric aerosols are important players in the Earth’s radiative budget, affecting incoming and outgoing solar radiation through absorption and scattering by direct and indirect means. While the cooling properties of pure inorganic aerosols are relatively well understood, the impact of organic aerosols on the radiative budget is unclear. Additionally, organic aerosols are transformed through chemical reactions during atmospheric transport. The resulting complex mixture of organic aerosol has variable physical and chemical properties that contribute further to the uncertainty of these species modifying the radiative budget. Correlations between oxidative processing and increased absorptivity, hygroscopicity, and cloud condensation nuclei activity have been observed, but the mechanisms behind these phenomena have remained unexplored. Herein, we review environmentally relevant heterogeneous mechanisms occurring on interfaces that contribute to the processing of aerosols. Recent laboratory studies exploring processes at the aerosol–air interface are highlighted as capable of generating the complexity observed in the environment. Furthermore, a variety of laboratory methods developed specifically to study these processes under environmentally relevant conditions are introduced. Remarkably, the heterogeneous mechanisms presented might neither be feasible in the gas phase nor in the bulk particle phase of aerosols at the fast rates enabled on interfaces. In conclusion, these surface mechanisms are important to better understand how organic aerosols are transformed in the atmosphere affecting the environment.

Dynamics of physical and chemical properties of soil after agricultural abandonment in a karst region in Southwest China

2021 ◽  
Author(s):  
Ke Wang ◽  
Zhigang Wang ◽  
Jiale Wang ◽  
Jianming Li ◽  
Bei Sun ◽  
...  
Keyword(s):  
Soil Quality ◽  
Water Loss ◽  
Chemical Properties ◽  
Soil Sampling ◽  
Physical And Chemical Properties ◽  
Rocky Desertification ◽  
Rock Outcrops ◽  
Physical And Chemical ◽  
Properties Of Soil ◽  
And Chemical Properties

&lt;p&gt;Rocky desertification induced by severe deforestation has caused the water loss and soil erosion in karst regions in southeast China, limiting local social and economic developments. To prevent further rocky desertification, the farmland which had obtained by deforestation were abandoned for recovery. As soil quality improved by agriculture abandonment should be examined, it is necessary to investigate the dynamics of physical and chemical properties of soil in different ages after abandonment. In this study, 38 investigation sites were selected for soil sampling on the slopes in Longtan trough valley in Youyang County, Chongqing Municipality, China. The dominant plant species of the investigation sites were also noted during soil sampling. The sites were divided into seven age classes according to their abandonment time. Dynamics of water content, bulk density, pH, and concentration of available potassium, available phosphorus, available nitrogen, total nitrogen and organic matters were examined. It suggests that soil quality might be deteriorated right after abandonment and then improved from around 20 years after abandonment. Deterioration of soil quality may be induced by lack of plant coverage and exposure of rock outcrops which may accelerate water loss and swelling and shrinkage cycles of soil. After the formation of plant communities and litter layer above the ground, soil quality was then apparently improved. These findings can provide a potential guideline for recovery management in karst regions in southwest of China.&lt;/p&gt;

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