Relationship between atmospheric BC concentration and vehicular traffic in high mountain locations, case of study: Portillo, Chilean Central Andes

Black carbon (BC) has been pointed as the second largest contributor to climate change after greenhouse gases due to its superior ability to absorb solar radiation. This characteristic is particularly relevant in cryospheric environments, where the presence of BC has been related to a decrease in the albedo of ice/snow surfaces and the acceleration of their melting. In this sense, determination and quantification of BC levels in remote areas can be useful when defining and differentiating emission sources from which they come, considering the importance that the resources of the cryosphere mean for the surrounding populations for drinking water supply, agriculture, hydropower, mining, etc.In this work, measurements of atmospheric BC from August 2016 to November 2019, carried out in Portillo, Chilean Central Andes, in the "Nunatak" laboratory-refuge (32&#176;50&#8217;43&#8217;&#8217;S, 70&#176;07&#8217;47&#8217;&#8217;W, 3000 m.a.s.l) are presented. This site, located in the highest altitude sector of the Andes mountain range, is very close to &#8220;Los Libertadores&#8221;, the border between Chile and Argentina. The road connecting both countries has a very high traffic density, with many passenger cars and trucks traveling in both directions. Due to weather, this route has a seasonal operating schedule. During the austral summer (September 1 - May 31) vehicular traffic is allowed 24 hours a day, while in winter (June 1 - August 31) traffic is allowed only from 8 am to 8 pm. Additionally, during heavy snowfalls, the access for vehicles is banned. To establish the impact of vehicular traffic on the atmospheric BC levels in the area, BC concentrations were continuously monitored by a Multi-Angle Absorption Photometer (MAAP) (Model 5012, Thermo). BC was measured in PM2.5, sampled on a glass filter tape an inlet air flow of 1.0 m3 h&#8722;1. Measurements were based on the optical attenuation at a wavelength of 637 nm. Data were originally sampled in one-minute resolution, but hourly and monthly means were extracted for further analysis. Results showed a markedly seasonal profile. Summer months presented the highest levels of BC for all the studied years, when the max. values were observed during the night and early morning hours, reaching 2.1 &#181;g m-3. In turn, during the day there were significant declines in BC concentrations, with min. BC values of 0.2 &#181;g m-3. Conversely, for all the years studied, winter months had lower average BC values than the summer months, with a markedly different hourly profile, since the max. values (up to 1.7 &#181;g m-3) were reached in noon and afternoon hours, while the min. values fell up to 0.1 &#181;g m-3 during night and early morning hours. Furthermore, BC concentration levels in Portillo were measured at an altitude where the main glaciers of central Andes are, showing the impact that BC could cause in the nearby glaciers. This marked seasonal pattern is in line with the traffic operational schedule above-mentioned, suggesting that in the study area, vehicular traffic is the main emission source of atmospheric BC. These findings are key pieces to identifying and implementing successful strategies for mitigation and adaptation on climate change.

Influence of climate change on soil erosion in high mountain area: a case study of upper Heihe river basin

10.5194/ismc2021-71 ◽

2021 ◽

Author(s):

Li Wang ◽

Fan Zhang ◽

Guanxing Wang

Keyword(s):

Climate Change ◽

Soil Erosion ◽

River Basin ◽

Effect Of Temperature ◽

Heihe River ◽

High Mountain ◽

Mountain Area ◽

Impact Of Climate Change ◽

High Mountain Area ◽

The impact of climate change on soil erosion is pronounced in high mountain area. In this study, the revised universal soil loss equation (RUSLE) model was improved for better calculation of soil erosion during snowmelt period by integrating a distributed hydrological model in upper Heihe river basin (UHRB). The results showed that the annual average soil erosion rate from 1982 to 2015 in the study area was 8.1 t ha-1 yr-1, belonging to the light grade. To evaluate the influence of climate change on soil erosion, detrended analysis of precipitation, temperature and NDVI was conducted. It was found that in detrended analysis of precipitation and temperature, the soil erosion of UHRB would decrease 26.5% and 3.0%, respectively. While in detrended analysis of NDVI, soil erosion would increase 9.9%. Compared with precipitation, the effect of temperature on total soil erosion was not significant, but the detrended analysis of temperature showed that the effect of temperature on soil erosion during snowmelt period can reach 70%. These finding were helpful for better understanding of the impact of climate change on soil erosion and provide a scientific basis for soil management in high mountain area under climate change in the future.

Bias correction of extreme values of high resolution climate simulations for risk analysis.

10.21203/rs.3.rs-264479/v1 ◽

2021 ◽

Author(s):

luis Augusto sanabria ◽

Xuerong Qin ◽

Jin Li ◽

Robert Peter Cechet

Keyword(s):

Climate Change ◽

Bias Correction ◽

Extreme Values ◽

The Body ◽

Future Climate ◽

Return Periods ◽

Climate Conditions ◽

Climate Simulations ◽

Abstract Most climatic models show that climate change affects natural perils' frequency and severity. Quantifying the impact of future climate conditions on natural hazard is essential for mitigation and adaptation planning. One crucial factor to consider when using climate simulations projections is the inherent systematic differences (bias) of the modelled data compared with observations. This bias can originate from the modelling process, the techniques used for downscaling of results, and the ensembles' intrinsic variability. Analysis of climate simulations has shown that the biases associated with these data types can be significant. Hence, it is often necessary to correct the bias before the data can be reliably used for further analysis. Natural perils are often associated with extreme climatic conditions. Analysing trends in the tail end of distributions are already complicated because noise is much more prominent than that in the mean climate. The bias of the simulations can introduce significant errors in practical applications. In this paper, we present a methodology for bias correction of climate simulated data. The technique corrects the bias in both the body and the tail of the distribution (extreme values). As an illustration, maps of the 50 and 100-year Return Period of climate simulated Forest Fire Danger Index (FFDI) in Australia are presented and compared against the corresponding observation-based maps. The results show that the algorithm can substantially improve the calculation of simulation-based Return Periods. Forthcoming work will focus on the impact of climate change on these Return Periods considering future climate conditions.

Assessing the Potential Contribution of Pfumvudza Towards Climate Smart Agriculture in Zimbabwe: A Review

10.20944/preprints202101.0619.v1 ◽

2021 ◽

Author(s):

Never Mujere

Keyword(s):

Climate Change ◽

Nitrous Oxide ◽

Food Security ◽

Nitrous Oxide Emissions ◽

Household Food Security ◽

Potential Contribution ◽

Household Food ◽

Smart Agriculture ◽

Concerns of food and environmental security have increased enormously in recent years due to the vagaries of climate change and variability. Efforts to promote food security and environmental sustainability often reinforce each other and enable farmers to adapt to and mitigate the impact of climate change and other stresses. Some of these efforts are based on appropriate technologies and practices that restore natural ecosystems and improve the resilience of farming systems, thus enhancing food security. Climate smart agriculture (CSA) principles, for example, translate into a number of locally-devised and applied practices that work simultaneously through contextualised crop-soil-water-nutrient-pest-ecosystem management at a variety of scales. The purpose of this paper is to review concisely the current state-of-the-art literature and ascertain the potential of the Pfumvudza concept to enhance household food security, climate change mitigation and adaptation as it is promoted in Zimbabwe. The study relied heavily on data from print and electronic media. Datasets pertaining to carbon, nitrous oxide and methane storage in soils and crop yield under zero tillage and conventional tillage were compiled. Findings show that, compared to conventional farming, Pfumvudza has great potential to contribute towards household food security and reducing carbon emissions if implemented following the stipulated recommendations. These include among others, adequate land preparation and timely planting and acquiring inputs. However, nitrous oxide emissions tend to increase with reduced tillage and, the use of artificial fertilizers, pesticides and herbicides is environmentally unfriendly.

Amazing Glacier Stuff

Glaciers ◽

10.1093/oso/9780199367252.003.0013 ◽

2015 ◽

Author(s):

Jorge Daniel Taillant

Keyword(s):

Climate Change ◽

Rocky Mountains ◽

Central Andes ◽

Mountain Range ◽

Outburst Floods ◽

The World ◽

Industrial Use ◽

Mitigating Circumstances ◽

Story Building ◽

At Home

This chapter is about what glaciers—and particularly what glacial and periglacial melt—mean to people and communities around the world. We often don’t realize that people interact daily with glaciers. Some go to visit and hike on glaciers or to photograph them for their magnificent beauty. Some ski on glaciers. Others extract water from glaciers for personal and industrial use. Others fear glaciers for their potent fury and destruction. People and communities are adapting to climate change and its impacts on glaciers, sometimes without even knowing it. Others are very aware of glacier vulnerability and are taking measures to address the changing cryosphere. They are mitigating circumstances and are adapting to impacts. In this chapter, we share stories and facts about glaciers and periglacial environments, which most people are probably unfamiliar with, and we explain how lives in these environments are changing due to climate change. Few people have heard of glacier tsunamis, but they exist, they’re real, they’re ferocious, and they can kill. Scientists call them glacier lake outburst floods (GLOFs). And as climate change deepens, more and more GLOF phenomena can be expected. Imagine you live at the foot of a mountain range like the Rocky Mountains, the Himalayas, or the Central Andes. On a nice sunny day, you can see the snow-capped mountains in the distance, maybe 20 or 30 km (12–18 mi) out, maybe even more. You are sitting at home when all of a sudden you feel shaking and hear a rumble. People start screaming. You look out the window and see people running frantically and erratically about. Then a woman yells, “The mountain! It’s coming! Run!” Imagine a large glacier the size of a dozen or so city blocks, perched atop a mountain. It’s 180 meters thick (600 ft), which is as tall as a sixty-story building. Below it, time and climate have formed a lake, a glacier lake occupying the same spot where the glacier once rested, pushing rock and earth out and forward as the glacier flowed downhill when it was solidly frozen and healthy.

Managing the Water-Energy Nexus within a Climate Change Context—Lessons from the Experience of Cuenca, Ecuador

Sustainability ◽

10.3390/su11215918 ◽

2019 ◽

Vol 11 (21) ◽

pp. 5918

Author(s):

Gianoli ◽

Bhatnagar

Keyword(s):

Climate Change ◽

Energy Saving ◽

Rainwater Harvesting ◽

Secondary Data ◽

Resource Planning ◽

Primary Data ◽

Water Energy Nexus ◽

The Impact ◽

Metabolic Cycle

The impact of climate change dynamics has a multiplicative effect when the interlinkages between water and energy are considered. This also applies to climate change co-benefits that derive from adaptation and mitigation initiatives implemented at the urban level and that address the water-energy nexus. A better understanding of the water-energy nexus is a precondition for integrated resource planning that optimizes the use of scarce resources. Against this background, the paper assesses the potential impact of water-energy saving technologies (WEST) on the water-energy nexus of Cuenca, Ecuador, focusing on how vulnerability to climate change may affect the water metabolic cycle of the urban area. Water-energy saving technologies such as rainwater harvesting, solar water heaters, and micro water turbines, reduce water-related energy consumption and mitigate greenhouse gases emissions; thereby illustrating the potential to generate climate change mitigation and adaptation co-benefits. The paper relies on primary data collected through interviews and a survey as well as secondary data in order to assess the extent to which water-energy saving technologies influence the water-energy nexus in Cuenca’s urban water metabolic cycle. Within the context of climate change, the paper develops a business-as-usual scenario and assesses how this is modified by the implementation of water-energy saving technologies.

Climate change mitigation and adaptation by biochar: mechanisms and regulatory trend in the rhizosphere

10.5194/egusphere-egu2020-22654 ◽

2020 ◽

Author(s):

Ali Feizi ◽

Bahar Razavi

Keyword(s):

Climate Change ◽

Climate Change Mitigation ◽

High Efficiency ◽

C Sequestration ◽

Alkaline Soil ◽

The Impact ◽

Change Mitigation ◽

Biochar Amendment ◽

Impacts Of Climate Change

Climate change represents a key challenge to the sustainability of global ecosystems and human prosperity in the twenty-first century. The impacts of climate change combined with natural climate variability are predominantly adverse, and often exacerbate other environmental challenges such as degradation of ecosystems, loss of biodiversity, and air, water and land pollution. Besides, rapid industrialization and increasing adaption of agrochemical based crop production practices since green revolution have considerably increased the heavy metal contaminations in the environment.Assessing the impacts of climate change on our planet and addressing risks and opportunities is essential for taking decisions that will remain robust under future conditions, when many climate change impacts are expected to become more significant.Here, we established a review survey to assess the impact of biochar amendment and agroforstry system on CO2 sequestration and methaloid remediation.Our data base showed that Agroforestry-based solutions for carbon dioxide capture and sequestration for climate change mitigation and adaptation in long-term is more practical and realistic options for a sustainable ecosystem and decreasing negative effect of climate change. This was more supported in arid and semi-arid regions as well as area with saline and alkaline soil (20%).From a soil remediation standpoint, the general trend has been shifting from reduction of the total concentration to reduction of the physic-chemically and/or biologically available fractions of metals. This regulatory shift represents a tremendous saving in remediation cost. While metals are not degradable, their speciation and binding with soil through biochar amending reduced their solubility, mobility, and bioavailability. While agroforestry showed high efficiency in C sequestration (32%), biochar amendment raveled significant mitigation in heavymetals bioavailability (42%). However, studies which coupled both approaches are limited. Thus, we conclude that combined Agroforestry and biochar amendment regulates C sequestration and metalloids remediation more efficiently.

Climate change and biodiversity; impacts, vulnerability and mitigation in Indian perspective : A review

Journal of Applied and Natural Science ◽

10.31018/jans.v9i1.1243 ◽

2017 ◽

Vol 9 (1) ◽

pp. 632-638

Author(s):

D. K. Soni ◽

Farid Ansari

Keyword(s):

Climate Change ◽

Sustainable Development ◽

Environmental Concern ◽

Anthropogenic Activities ◽

Current Trend ◽

Green Energy ◽

Transport Sector ◽

Natural Habitats ◽

As per the nature of law, changes are bound to be happening in the system if any component of the system gets altered by any means. Change of climate and subsequently loss of biodiversity threatens the existence of human being. The loss of biodiversity, which has been happening worldwide, poses a serious threat to the anthro-pological system. An investigation of the current trend and future scenario shows that this loss is likely to continue in the foreseeable times. India has a huge variety of biodiversity and in the last few decades, its biodiversity has come under threat from climate change which accelerated by the anthropogenic activities of various sources of pollution. The review shows that climate change is a serious environmental challenge that undermines the determination for sustainable development. Climate change has become the most crucial environmental concern of the decade. Much attention is rightly focused on reducing carbon emissions and greenhouse gases from industrial, energy and transport sector through reduction in fuel consumption and use of renewable/green energy. However, as countries are looking for mitigation and adaptation processes, protection of natural habitats is a key factor of climate change strategies. Strengthened support for protected areas and more sustainable resource management can contribute to strategies as well as for protection of the biological resources and ecosystem. Climate change is developing as one of the greatest threats to biodiversity, increasing pressures on genetic resources, species and populations. Biodiver-sity conservation and sustainable development are the possible ways to curtail the impact of climate change. Although, adequate efforts have been made worldwide to tackle the environmental challenges, the adverse effects of climate change are still accelerating and the rate of loss of biodiversity is continuing globally.

34 Warming Waters and Souring Seas: Climate Change and Ocean Acidification

10.1093/law/9780198715481.003.0034 ◽

2015 ◽

Author(s):

Stephens Tim

Keyword(s):

Climate Change ◽

Ocean Acidification ◽

Global Climate ◽

Law Of The Sea ◽

Climate Mitigation ◽

Sea Levels ◽

Rising Sea Levels ◽

This chapter examines the impact of climate change and ocean acidification on the oceans and their implications for the international law of the sea. In particular, it assesses the implications of rising sea levels for territorial sea baselines, the seawards extent of maritime zones, and maritime boundaries. It also considers the restrictions placed by the UN Nations Convention on the Law of the Sea (LOSC) upon States in pursuing climate mitigation and adaptation policies, such as attempts to ‘engineer’ the global climate by artificially enhancing the capacity of the oceans to draw CO2 from the atmosphere. The chapter analyzes the role of the LOSC, alongside other treaty regimes, in addressing the serious threat of ocean acidification.

The Effect of Climate Change on Spring Maize (Zea mays L.) Suitability across China

Sustainability ◽

10.3390/su10103804 ◽

2018 ◽

Vol 10 (10) ◽

pp. 3804 ◽

Cited By ~ 4

Author(s):

Yuhe Ji ◽

Guangsheng Zhou ◽

Qijin He ◽

Lixia Wang

Keyword(s):

Climate Change ◽

Zea Mays ◽

Zea Mays L ◽

Threshold Value ◽

Affected Area ◽

Spring Maize ◽

New Perspective ◽

Abrupt Shifts ◽

Spring maize (Zea mays L.) is a thermophilic C4 crop which is sensitive to climate change. This paper provides a detailed assessment of the effect of climate change on the crop from a new perspective, by predicting the probability of the potential distribution of spring maize across China. The affected area of spring maize suitability was identified, and then the affected area was subdivided into the improved area and the deteriorated area. Our results confirmed that there was a detrimental consequence for spring maize suitability under observed climate change from 1961–1990 to 1981–2010. However, our results revealed that warming scenarios of 1.5 °C and 2 °C were helpful for the suitable area expansion of spring maize. The affected area was smaller under warming scenarios than under historical climate change, revealing that temperature rise alone was not enough to trigger a “tipping point” (a threshold value after which abrupt shifts occur) for spring maize, even if warming is 2 °C above the level of 1961–1990. Our results not only benefit China in the design of mitigation and adaptation strategies, but also provide a theoretical judgement that the impact of global warming on the crop ecosystem is not serious if other climate factors remain unchanged.

Understanding the impacts of climate change on high mountain practices: the case of the Mont Blanc massif through an interdisciplinary approach

10.5194/egusphere-egu21-1729 ◽

2021 ◽

Author(s):

Emmanuel Salim ◽

Jacques Mourey ◽

Ludovic Ravanel ◽

Pierre-Alain Duvillard ◽

Maëva Cathala ◽

...

Keyword(s):

Climate Change ◽

Environmental Changes ◽

Geographical Area ◽

Interdisciplinary Approach ◽

High Elevation ◽

Western Alps ◽

High Mountain ◽

The Stability ◽

The Impact ◽

Mont Blanc Massif

The intensity of the current climate change has strong consequences on high mountain tourism activities. Winter activities are currently the most studied (ski industry). However, the consequences of environmental changes are also strong in summer, as geomorphological processes are enhanced at high elevation. The Mont Blanc Massif (Western Alps) is a particularly favourable terrain for the development of research about these processes. Emblematic high summits (28 of the 82 peaks > 4000 m of the Alps), dozens of glaciers, strongly developed tourism with summer/winter equivalence, active mountaineering practice, etc. all contribute to the interest of studying this geographical area. A lot of work has been carried out on glaciological and geomorphological issues. These studies, which deal with "physical" impacts of the climate change on the high mountains, are also supplemented by studies of their consequences on human societies, as its impacts on practices such as mountaineering or glacier tourism. Risk-related issues are also taken into account with, for example, the stability of infrastructure (huts, ski lifts) or the impact of glacial shrinkage on the formation of new and potentially hazardous lakes. Accordingly, the aims of our presentation are to show the extent of the research developed on climate change in the Mont Blanc massif and how social and environmental sciences are interlinked to provide a holistic vision of the issues of this territory. As these experiments are not exactly interdisciplinary experiments, this presentation also aims to discuss the points that need to be further developed in order to promote inter- and trans-disciplinary research.