Paleolimnology: The Past Meets the Future

2003 ◽  
Author(s):  
Andrew S. Cohen
Keyword(s):  
Climate Change ◽  
Organic Geochemistry ◽  
Global Climate ◽  
Future Research ◽  
System 2 ◽  
To Come ◽  
Detailed Interpretation ◽  
Past Climate Change ◽  
Automated Tools ◽  
Earth’S Climate

Exciting days lie ahead for paleolimnology. As we embark on a new millennium, the opportunities and challenges in this field are extremely bright. As an epilogue to this book, it seems appropriate to conclude with a few of the developments that seem to me particularly promising for the near future. 1. Increasing application of paleolimnological data to address problems in global climate change. Paleolimnologists need to make governments and societies aware of the importance of high-resolution paleorecords from lakes for providing information about baseline variability of the biosphere, consequences and histories of past climate change events, and past responses of our precious aquatic resources to such changes. Paleolimnology should and will increasingly play a role in providing decision-makers with critical information about earth system history as they formulate policies to cope with these changes. Few, if any, paleoenvironmental records provide earth history records in environments as intimately associated with human activity as lake deposits. Lakes and wetlands are increasingly recognized as potentially important components of the global carbon cycle, especially as environments for sequestering large volumes of carbon, and future research will undoubtedly quantify the magnitude and dynamics of this role. Paleolimnologists will need to work even more closely with climate modelers, hydrologists, and atmospheric scientists in years to come, to insure that the paleorecords we study will help resolve important questions about the earth’s climate system. 2. Advances in geobiology. The rapid developments of new and automated tools in molecular biology and organic geochemistry for analyzing small sample volumes and extracting compound-specific isotopic information from organic compounds have important implications for paleolimnology. In years to come we will increasingly rely on organic geochemistry and microbial geobiology to help decipher the organic record of algal primary producers, decomposers, and other elements of the microbial food web. These are components of a lake’s ecosystem that ecologists recognize as immensely important in biogeochemical cycles and as being on the front line of lake responses to changes in climate and watershed processes, but which have heretofore been largely intractable to any detailed interpretation by paleolimnologists.

From “Inconvenient Truth” to Effective Governance

2018 ◽  
Author(s):  
Richard Passarelli ◽  
David Michel ◽  
William Durch
Keyword(s):  
Climate Change ◽  
Global Climate ◽  
Climate System ◽  
Global Public Good ◽  
Environmental Groups ◽  
Quarter Century ◽  
Effective Governance ◽  
Political Response ◽  
Earth’S Climate ◽  
National Governments

The Earth’s climate system is a global public good. Maintaining it is a collective action problem. This chapter looks at a quarter-century of efforts to understand and respond to the challenges posed by global climate change and why the collective political response, until very recently, has seemed to lag so far behind our scientific knowledge of the problem. The chapter tracks the efforts of the main global, intergovernmental process for negotiating both useful and politically acceptable responses to climate change, the UN Framework Convention on Climate Change, but also highlights efforts by scientific and environmental groups and, more recently, networks of sub-national governments—especially cities—and of businesses to redefine interests so as to meet the dangers of climate system disruption.

Global Climate Change: Real or Myth?

2014 ◽  
Author(s):  
Michael H. Fox
Keyword(s):  
Climate Change ◽  
United Nations ◽  
Greenhouse Gases ◽  
Global Climate Change ◽  
Global Climate ◽  
An Inconvenient Truth ◽  
The World ◽  
The United Nations ◽  
Earth’S Climate ◽  
The One

We, the teeming billions of people on earth, are changing the earth’s climate at an unprecedented rate because we are spewing out greenhouse gases and are heading to a disaster, say most climate scientists. Not so, say the skeptics. We are just experiencing normal variations in earth’s climate and we should all take a big breath, settle down, and worry about something else. Which is it? A national debate has raged for the last several decades about whether anthropogenic (man-made) sources of carbon dioxide (CO2 ) and other so-called “greenhouse gases“ (primarily methane and nitrous oxide) are causing the world to heat up. This phenomenon is usually called “global warming,” but it is more appropriate to call it “global climate change,” since it is not simply an increase in global temperatures but rather more complex changes to the overall climate. Al Gore is a prominent spokesman for the theory that humans are causing an increase in greenhouse gases leading to global climate change. His movie and book, An Inconvenient Truth, gave the message widespread awareness and resulted in a Nobel Peace Prize for him in 2008. However, the message also led to widespread criticism. On the one hand are a few scientists and a large segment of the general American public who believe that there is no connection between increased CO2 in the atmosphere and global climate change, or if there is, it is too expensive to do anything about it, anyway. On the other hand is an overwhelming consensus of climate scientists who have produced enormous numbers of research papers demonstrating that increased CO2 is changing the earth’s climate. The scientific consensus is expressed most clearly in the Fourth Assessment Report in 2007 by the United Nations–sponsored Intergovernmental Panel on Climate Change (IPCC), the fourth in a series of reports since 1990. The IPCC began as a group of scientists meeting in Geneva in November 1988 to discuss global climate issues under the auspices of the World Meteorological Organization and the United Nations Environment Program.

Climate Variability in the Context of Climate Change: El Niño and Other Oscillations

2008 ◽  
Author(s):  
Cynthia Rosenzweig ◽  
Daniel Hillel
Keyword(s):  
Climate Change ◽  
Climate Variability ◽  
North Atlantic ◽  
El Niño ◽  
El Nino ◽  
Global Climate ◽  
Climate System ◽  
The Arctic ◽  
The Pacific ◽  
Earth’S Climate

The climate system envelops our planet, with swirling fluxes of mass, momentum, and energy through air, water, and land. Its processes are partly regular and partly chaotic. The regularity of diurnal and seasonal fluctuations in these processes is well understood. Recently, there has been significant progress in understanding some of the mechanisms that induce deviations from that regularity in many parts of the globe. These mechanisms include a set of combined oceanic–atmospheric phenomena with quasi-regular manifestations. The largest of these is centered in the Pacific Ocean and is known as the El Niño–Southern Oscillation. The term “oscillation” refers to a shifting pattern of atmospheric pressure gradients that has distinct manifestations in its alternating phases. In the Arctic and North Atlantic regions, the occurrence of somewhat analogous but less regular interactions known as the Arctic Oscillation and its offshoot, the North Atlantic Oscillation, are also being studied. These and other major oscillations influence climate patterns in many parts of the globe. Examples of other large-scale interactive ocean–atmosphere– land processes are the Pacific Decadal Oscillation, the Madden-Julian Oscillation, the Pacific/North American pattern, the Tropical Atlantic Variability, the West Pacific pattern, the Quasi-Biennial Oscillation, and the Indian Ocean Dipole. In this chapter we review the earth’s climate system in general, define climate variability, and describe the processes related to ENSO and the other major systems and their interactions. We then consider the possible connections of the major climate variability systems to anthropogenic global climate change. The climate system consists of a series of fluxes and transformations of energy (radiation, sensible and latent heat, and momentum), as well as transports and changes in the state of matter (air, water, solid matter, and biota) as conveyed and influenced by the atmosphere, the ocean, and the land masses. Acting like a giant engine, this dynamic system is driven by the infusion, transformation, and redistribution of energy.

How climate change and regulations can affect the economics of mycotoxins

2016 ◽  
Vol 9 (5) ◽  
pp. 653-663 ◽  
Author(s):  
F. Wu ◽  
N.J. Mitchell
Keyword(s):  
Climate Change ◽  
Climatic Factors ◽  
Global Climate ◽  
Animal Health ◽  
The United States ◽  
Economic Losses ◽  
Regulatory Limits ◽  
Food And Feed ◽  
To Come ◽  
Near Future

In the decades to come, the one factor that will likely have the greatest effect on the economics of the mycotoxin problem is climate change. This article reviews the current state of known science on how the global climate has been changing in recent decades, as well as likely climate change trends in the near future. The article focuses in depth on how climatic variables affect fungal infection and production of specific mycotoxins in food crops, and how near-future climatic changes will shape the prevalence of these mycotoxins in crops in different parts of the world. Because of regulatory limits set on maximum allowable levels of mycotoxins in food and feed, growers will experience economic losses if climatic factors cause certain mycotoxins to become more prevalent. A case study is presented of how maize growers in the United States will experience increased economic losses due to slightly higher aflatoxin levels in maize, even if those levels may still be below regulatory limits. We discuss the overall expected economic impacts of climate change-induced mycotoxin contamination worldwide – not just market-related losses, but also losses to human and animal health and risks to food security. Aflatoxin is the mycotoxin that is most likely to increase under near-future climate scenarios; and thus is likely to pose the greatest amount of economic risk of all the mycotoxins.

scholarly journals CLIMATE CHANGE CHALLENGES FACING SRI LANKA: A LITERATURE REVIEW

2021 ◽  
Author(s):  
S.P.M. Dasandara ◽  
◽  
U. Kulatunga ◽  
M.J.B. Ingirige ◽  
T. Fernando ◽  
...  
Keyword(s):  
Climate Change ◽  
Sri Lanka ◽  
Literature Review ◽  
Climate Change Impacts ◽  
Future Research ◽  
Mitigation And Adaptation ◽  
Adverse Weather ◽  
Temperature Levels ◽  
Earth’S Climate ◽  
The Many

The earth’s climate has changed throughout history and climate change can be identified as an inevitable phenomenon which is being experienced by the whole world. When considering the Sri Lankan context, it is no different to the global context in that the country’s climate has already changed. Sri Lanka, being an island state, is vulnerable to many climate change impacts including high-temperature levels, adverse weather events, sea level rising, and changes in precipitation patterns. The many challenges that arise from these climate-related issues are projected to continue through this century and beyond. Thus, climate change mitigation and adaptation have become the most appropriate ways to restrain these climate change challenges in Sri Lanka. It is paramount to get a broad understanding of how disastrous these climate change challenges are, prior to implementing appropriate responses to overcome them. This urges the need for conducting an in-depth investigation of prevailing climate change challenges in Sri Lanka. Thus, this study presents the prevailing climate change challenges facing Sri Lanka through a conceptual framework, that has been developed based on the existing literature. The developed framework reveals how these prevailing climate changes can lead to a number of challenges. These challenges were identified under three main categories as economic, social, and environmental challenges. The knowledge generated through this literature review will be the focus of future research.

scholarly journals Climate change risk: Challenge for corporate governance

2021 ◽  
Vol 10 (2, special issue) ◽  
pp. 258-268
Author(s):  
Hugh Grove ◽  
Maclyn Clouse ◽  
Tracy Xu
Keyword(s):  
Climate Change ◽  
Corporate Governance ◽  
Global Climate Change ◽  
Boards Of Directors ◽  
Global Climate ◽  
Research Question ◽  
Empirical Studies ◽  
Future Research ◽  
Climate Change Risk ◽  
Climate Change Risks

The major research question of this paper is to analyze climate change risk as a challenge to corporate governance. Climate action failure was the environmental risk most frequently listed in the top ten country risks. It also becomes a major reason that many companies are taking their own initiatives on climate change action which poses an imminent challenge for corporate governance as boards of directors track and assess such initiatives by their own companies. Boards can play a key role in guiding their organizations into the next new normal in the wake of global pandemic, economic disruptions, and ongoing climate change problems. This paper identifies and studies the corporate governance risks and opportunities related to global climate change risk and provides recommendations to boards of directors. The major sections of this paper are global climate change risks, corporate climate change pledges, climate-related financial disclosures, major topics in the Global Climate Change report, whether companies are ready to manage major climate change risks and opportunities, climate-related investment benchmarks, and conclusions. Future research could investigate this climate change risk challenge with case studies or empirical studies.

Global climate changes during the most recent two millennia

2020 ◽  
Author(s):  
Sarah S. Eggleston ◽  
Oliver Bothe ◽  
Nerilie Abram ◽  
Bronwen Konecky ◽  
Hans Linderholm ◽  
...  
Keyword(s):  
Climate Change ◽  
Climate Changes ◽  
Climate Models ◽  
Global Climate ◽  
Climate Science ◽  
High Temporal Resolution ◽  
Past Climate ◽  
Global Climate Changes ◽  
The Past ◽  
Earth’S Climate

<p>The past two thousand years is a key interval for climate science because this period encompasses both the era of human-induced global warming and a much longer interval when changes in Earth's climate were governed principally by natural drivers. This earlier 'pre-industrial' period is particularly important for two reasons. Firstly, we now have a growing number of well-dated, climate sensitive proxy data with high temporal resolution that spans the full period. Secondly, the pre-industrial climate provides context for present-day climate change, sets real-world targets against which to evaluate the performance of climate models, and allows us to address other questions of Earth sciences that cannot be answered using only a century and a half of observational data. </p><p>Here, we first provide several perspectives on the concept of a 'pre-industrial climate'. Then, we highlight the activities of the PAGES 2k Network, an international collaborative effort focused on global climate change during the past two thousand years. We highlight those aspects of pre-industrial conditions (including both past climate changes and past climate drivers) that are not yet well constrained, and suggest potential areas for research during this period that would be relevant to the evolution of Earth's future climate.</p>

2. The climate change debate

2014 ◽  
pp. 12-28
Author(s):  
Mark Maslin
Keyword(s):  
Climate Change ◽  
Global Climate ◽  
Science Research ◽  
Temperature Data ◽  
Climate Modelling ◽  
Data Set ◽  
Global Environmental ◽  
Climate Change Science ◽  
Global Climate Modelling ◽  
Past Climate Change

‘The climate change debate’ describes the combination of factors that led to recognition and acceptance of climate change, including that it was anthropogenic, beginning with climate change science research carried out in the 1950s and early 1960s. The next stages of research into this area came later in the 1980s: the observed upturn in the global temperature data set; the increased knowledge of past climate change; significant advances in global climate modelling; the emergence of global environmental awareness; increased media interest in the confrontational nature of the debate; and finally politicians and economists taking the climate change threat seriously since the late 1990s.

A Regime Paralyzed: An Exploration of Current Climate Politics and the Urgent Need for Reform

2018 ◽  
Author(s):  
Brenna Owen
Keyword(s):  
Climate Change ◽  
Fossil Fuels ◽  
Global Climate ◽  
International System ◽  
Scientific Evidence ◽  
Climate Politics ◽  
International Climate ◽  
Reduce Emissions ◽  
To Come ◽  
Climate Crisis

The science on climate change is in: legitimate scientists have been unable to provide serious scientific evidence that casts doubt on the fact that anthropogenic, that is, human-caused climate change is occurring. Less clear are the speed of climate change and the extent of damages to environmental and human health if emissions from fossil fuels continue unabated. The most recent international conference on the environment, namely the 2013 United Nations Framework Convention on Climate Change (UNFCCC) or Conference of the Parties (COP) 19, was characterized by bitter intergovernmental negotiations and non-committal by major emitters to watered-down agreements. COP 19 exemplifies the inadequacies inherent in the current international system, which render it incapable of effectively addressing climate change; in other words, the international community remains unable to come to an agreement or agreements that mitigate the effects of climate change now, while establishing adaptation mechanisms for the future as the effects of climate change become increasingly pronounced. The efficacy of the current regime is impeded not only by its singular, non-binding approach to emissions reduction, but also by the ability of a small number of major emitters’ ability to hinder agreements. In order to make rising to the challenge of the global climate crisis politically feasible, the international climate regime must abandon the current emissions cap approach and adopt an incremental approach to negotiations, crafting sector-specific agreements that aim to gradually reduce emissions in a viable and equitable manner.

scholarly journals Cosmic rays and space weather: effects on global climate change

2012 ◽  
Vol 30 (1) ◽  
pp. 9-19 ◽  
Author(s):  
L. I. Dorman
Keyword(s):  
Climate Change ◽  
Cosmic Rays ◽  
Global Climate Change ◽  
Energy Input ◽  
Global Climate ◽  
External Factors ◽  
Weather Effects ◽  
Earth’S Climate ◽  
Internal And External Factors ◽  
Solar Energy Input

Abstract. We consider possible effects of cosmic rays and some other space factors on the Earth's climate change. It is well known that the system of internal and external factors formatting the climate is very unstable; decreasing planetary temperature leads to an increase of snow surface, and decrease of the total solar energy input into the system decreases the planetary temperature even more, etc. From this it follows that even energetically small factors may have a big influence on climate change. In our opinion, the most important of these factors are cosmic rays and cosmic dust through their influence on clouds, and thus, on climate.

Sign in / Sign up

Export Citation Format

Share Document