History of the greenhouse effect

1990 ◽  
Vol 14 (1) ◽  
pp. 1-18 ◽  
Author(s):  
M.D.H. Jones ◽  
A. Henderson-Sellers
Keyword(s):  
Sea Level ◽  
Greenhouse Effect ◽  
Climate Models ◽  
Atmospheric Sciences ◽  
Level Change ◽  
Oceanic Response ◽  
New Directions ◽  
History Of ◽  
Increasing Temperature ◽  
The Relationship

The greenhouse effect is now commonly accepted by the scientific community, politicians and the general public. However, the misnomer 'greenhouse effect' has perpetuated, and there are a number of aspects of the effect which are poorly understood outside the atmospheric sciences. On such misconception is that greenhouse research is a recent phenomenon; another is that glasshouses are warmed by the same mechanism as lies at the heart of the greenhouse effect. This review traces the theory as far back as 1827, highlighting new directions and significant advances over that time. Four main themes can be discerned: 1) certain radiatively active gases are responsible for warming the planet ; 2) that humans can inadvertently influence this warming; 3) climate models are designed to permit prediction of the climatic changes in the atmospheric loadings of these gases but that they have not yet achieved this goal of prediction; and 4) many scenarios of changes, and especially of impact, are premised on relatively weak analysis. This latter point is illustrated by an examination of the relationship between increasing temperature and sea level change (the oceanic response to atmospheric warming). Current research suggests that sea-level rise is not likely to be as high as had previously been anticipated.

scholarly journals The relationship between sea-level change, soil formation and stress history of a very soft clay deposit

2019 ◽  
Vol 5 (3) ◽  
pp. 461-479 ◽  
Author(s):  
Fernando A.B. Danziger ◽  
◽  
Graziella M.F. Jannuzzi ◽  
Ian S.M. Martins ◽  
Keyword(s):  
Sea Level ◽  
Soft Clay ◽  
Soil Formation ◽  
Sea Level Change ◽  
Stress History ◽  
Clay Deposit ◽  
Level Change ◽  
History Of ◽  
The Relationship

Phanerozoic Oxygen

2017 ◽  
Author(s):  
Donald Eugene Canfield
Keyword(s):  
Oxygen Consumption ◽  
Organic Carbon ◽  
Sea Level ◽  
Time Scale ◽  
Atmospheric Oxygen ◽  
Sea Level Change ◽  
Oxygen Production ◽  
Level Change ◽  
History Of ◽  
Geologic Processes

This chapter discusses the modeling of the history of atmospheric oxygen. The most recently deposited sediments will also be the most prone to weathering through processes like sea-level change or uplift of the land. Thus, through rapid recycling, high rates of oxygen production through the burial of organic-rich sediments will quickly lead to high rates of oxygen consumption through the exposure of these organic-rich sediments to weathering. From a modeling perspective, rapid recycling helps to dampen oxygen changes. This is important because the fluxes of oxygen through the atmosphere during organic carbon and pyrite burial, and by weathering, are huge compared to the relatively small amounts of oxygen in the atmosphere. Thus, all of the oxygen in the present atmosphere is cycled through geologic processes of oxygen liberation (organic carbon and pyrite burial) and consumption (weathering) on a time scale of about 2 to 3 million years.

scholarly journals Reconciling global mean and regional sea level change in projections and observations

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jinping Wang ◽  
John A. Church ◽  
Xuebin Zhang ◽  
Xianyao Chen
Keyword(s):  
Sea Level ◽  
Climate Models ◽  
Tide Gauge ◽  
Sea Level Change ◽  
Global Network ◽  
Weighted Mean ◽  
Level Change ◽  
Regional Sea Level ◽  
Global Mean ◽  
Regional Sea Level Change

AbstractThe ability of climate models to simulate 20th century global mean sea level (GMSL) and regional sea-level change has been demonstrated. However, the Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report (AR5) and Special Report on the Ocean and Cryosphere in a Changing Climate (SROCC) sea-level projections have not been rigorously evaluated with observed GMSL and coastal sea level from a global network of tide gauges as the short overlapping period (2007–2018) and natural variability make the detection of trends and accelerations challenging. Here, we critically evaluate these projections with satellite and tide-gauge observations. The observed trends from GMSL and the regional weighted mean at tide-gauge stations confirm the projections under three Representative Concentration Pathway (RCP) scenarios within 90% confidence level during 2007–2018. The central values of the observed GMSL (1993–2018) and regional weighted mean (1970–2018) accelerations are larger than projections for RCP2.6 and lie between (or even above) those for RCP4.5 and RCP8.5 over 2007–2032, but are not yet statistically different from any scenario. While the confirmation of the projection trends gives us confidence in current understanding of near future sea-level change, it leaves open questions concerning late 21st century non-linear accelerations from ice-sheet contributions.

scholarly journals Experimental protocol for sealevel projections from ISMIP6 standalone ice sheet models

2020 ◽  
Author(s):  
Sophie Nowicki ◽  
Antony J. Payne ◽  
Heiko Goelzer ◽  
Helene Seroussi ◽  
William H. Lipscomb ◽  
...  
Keyword(s):  
Sea Level ◽  
Climate Models ◽  
Ice Sheet ◽  
Coupled Model ◽  
Sea Level Change ◽  
Model Intercomparison ◽  
Level Change ◽  
Ice Sheet Modeling ◽  
Emissions Scenarios ◽  
Intercomparison Project

Abstract. Projection of the contribution of ice sheets to sea-level change as part of the Coupled Model Intercomparison Project – phase 6 (CMIP6) takes the form of simulations from coupled ice-sheet-climate models and standalone ice sheet models, overseen by the Ice Sheet Model Intercomparison Project for CMIP6 (ISMIP6). This paper describes the experimental setup for process-based sea-level change projections to be performed with standalone Greenland and Antarctic ice sheet models in the context of ISMIP6. The ISMIP6 protocol relies on a suite of polar atmospheric and oceanic CMIP-based forcing for ice sheet models, in order to explore the uncertainty in projected sea-level change due to future emissions scenarios, CMIP models, ice sheet models, and parameterizations for ice-ocean interactions. We describe here the approach taken for defining the suite of ISMIP6 standalone ice sheet simulations, document the experimental framework and implementation, as well as present an overview of the ISMIP6 forcing to be used by participating ice sheet modeling groups.

New Directions in the History of Medicine in European, Colonial and Transimperial Contexts

2016 ◽  
Vol 25 (2) ◽  
pp. 387-399 ◽  
Author(s):  
JENNIFER JOHNSON
Keyword(s):  
History Of Medicine ◽  
Health Policies ◽  
Colonial Medicine ◽  
Colonial Rule ◽  
International Organisations ◽  
Political Factors ◽  
New Directions ◽  
History Of ◽  
Intellectual Networks ◽  
The Relationship

In the late 1970s scholars of Europe and its colonies began probing the relationship between medicine and empire. In the decades since, following the cue of Steven Feierman, John Janzen, Megan Vaughan and Randall Packard, the literature has demonstrated that colonial medicine constructed an African ‘other’ and greatly contributed to harmful practices that did not improve the overall health and welfare of the local populations European administrations claimed to be civilising. Through the 1990s, scholarship concentrated primarily on local agency and socio-economic and political factors that furthered our understanding of how medicine and health care operated in a colonial context. These foundational studies have enabled the most recent wave of research in the history of medicine to turn its attention to questions of public health, especially as it relates to the politics of development, nationalism, and decolonisation. Historians, including Sunil Amrith and Clifford Rosenberg, have emphasised the significant role medicine has played in projecting state power in European colonies and have shown how international organisations became prominent agents in shaping national and global health policies. However, their important work has left unanswered questions about the intellectual networks that formed the elite scientific and medical minds of the day and the legacies of health policies under colonial rule.

HISTORICAL PERSPECTIVES ON ECONOMIC CRISES AND HEALTH

2010 ◽  
Vol 53 (2) ◽  
pp. 477-494 ◽  
Author(s):  
KIRSTY WALKER
Keyword(s):  
Public Health ◽  
Economic Crisis ◽  
Economic Downturn ◽  
Policy Makers ◽  
History Of Public Health ◽  
Historical Perspectives ◽  
The Great Depression ◽  
New Directions ◽  
History Of ◽  
The Relationship

ABSTRACTDuring periods of recession, both historians and policy-makers have tended to revisit the multi-faceted relationship between health and economic crisis. It seems likely that the current economic downturn will trigger a new revival of efforts to gauge its implications for people's health around the world. This review will reflect on aspects of the relationship between health and economic crisis, exploring some of the unanswered questions within the historiography of the Great Depression and health, and suggest new directions that this work might take. Within a broadly transnational framework, I will reassess the diverse historiographies of interwar public health, in order to highlight ways in which the methodologies used could inspire future studies for neglected areas within this field, such as Southeast Asia. In doing so, I will illustrate that the effects of the interwar economic fluctuations on health status remain imprecise and difficult to define, but marked a transitional moment in the history of public health.

scholarly journals An assessment of uncertainties in using volume-area modelling for computing the twenty-first century glacier contribution to sea-level change

2011 ◽  
Vol 5 (3) ◽  
pp. 1655-1695 ◽  
Author(s):  
A. B. A. Slangen ◽  
R. S. W. van de Wal
Keyword(s):  
Mass Balance ◽  
Sea Level ◽  
Climate Models ◽  
Climate Model ◽  
Sea Level Change ◽  
Total Uncertainty ◽  
Ice Caps ◽  
Level Change ◽  
Initial Volume ◽  
Temperature And Precipitation

Abstract. A large part of present-day sea-level change is formed by the melt of glaciers and ice caps (GIC). This study focuses on the uncertainties in the calculation of the GIC contribution on a century timescale. The model used is based on volume-area scaling, combined with the mass balance sensitivity of the GIC. We assess different aspects that contribute to the uncertainty in the prediction of the contribution of GIC to future sea-level rise, such as (1) the volume-area scaling method (scaling constant), (2) the choice of glacier inventory, (3) the imbalance of glaciers with climate, (4) the mass balance sensitivity, and (5) the climate models. Additionally, a comparison of the model results to the 20th century GIC contribution is presented. We find that small variations in the scaling constant cause significant variations in the initial volume of the glaciers, but only limited variations in the glacier volume change. If two existing glacier inventories are tuned such that the initial volume is the same, the GIC sea-level contribution over 100 yr differs by 0.027 m. It appears that the mass balance sensitivity is also important: variations of 20 % in the mass balance sensitivity have an impact of 17 % on the resulting sea-level projections. Another important factor is the choice of the climate model, as the GIC contribution to sea-level change largely depends on the temperature and precipitation taken from climate models. Combining all the uncertainties examined in this study leads to a total uncertainty of 4.5 cm or 30 % in the GIC contribution to global mean sea level. Reducing the variance in the climate models and improving the glacier inventories will significantly reduce the uncertainty in calculating the GIC contributions, and are therefore crucial actions to improve future sea-level projections.

Sign in / Sign up

Export Citation Format

Share Document