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Global warming
\"Describes the current scientific evidence for global warming and the causes and effects of climate change. Includes charts and maps\"--Provided by publisher.
Book
Reconciling controversies about the ‘global warming hiatus’
Between about 1998 and 2012, a time that coincided with political negotiations for preventing climate change, the surface of Earth seemed hardly to warm. This phenomenon, often termed the ‘global warming hiatus’, caused doubt in the public mind about how well anthropogenic climate change and natural variability are understood. Here we show that apparently contradictory conclusions stem from different definitions of ‘hiatus’ and from different datasets. A combination of changes in forcing, uptake of heat by the oceans, natural variability and incomplete observational coverage reconciles models and data. Combined with stronger recent warming trends in newer datasets, we are now more confident than ever that human influence is dominant in long-term warming.
Apparently contradictory conclusions regarding the ‘global warming hiatus’ are reconciled, strengthening the current scientific understanding that long-term global warming is extremely likely to be of anthropogenic origin.
Analysis of a global warming hiatus
After a spike in global-mean temperature associated with the 1998 El Niño, the climate system experienced several years of reduced warming, and perhaps even slight cooling. This period, variously termed the 'hiatus', 'pause' or 'slowdown', should have come as no surprise given our understanding of El Niño and natural climate variability. However, soon after the recognition of the reduced warming, it appeared that models and observations were diverging, raising the question of whether the models were missing important processes. Although global warming has since recommenced, the hiatus sparked an enormous research effort. Iselin Medhaug
et al
. synthesize the literature and reassess the model and observational evidence. Their assessment reconciles the apparent contradictions between models and data and obviates the need to revise our understanding of the underlying physics of climate systems. The hiatus was an episode of natural variability after all.
Journal Article
Carbon criminals, climate crimes
Carbon Criminals, Climate Crimes analyzes the looming threats posed by climate change from a criminological perspective. It advances the field of green criminology through a examination of the criminal nature of catastrophic environmental harms resulting from the release of greenhouse gases. The book describes and explains what corporations in the fossil fuel industry, the U.S. government, and the international political community did, or failed to do, in relation to global warming. Carbon Criminals, Climate Crimes integrates research and theory from a wide variety of disciplines, to analyze four specific state-corporate climate crimes: continued extraction of fossil fuels and rising carbon emissions; political omission (failure) related to the mitigation of these emissions; socially organized climate change denial; and climate crimes of empire, which include militaristic forms of adaptation to climate disruption. The final chapter reviews policies that could mitigate greenhouse gas emissions, adapt to a warming world, and achieve climate justice.
eBook
Sila's revenge
Eighteen-year old Ashley Anowiak is an eco-warrior who is prepared to go to any lengths to bring the world's attention to the plight of Planet Earth. She's already burned down the office for the local oil company. Now she's ready to move out of our her own Arctic community and into the international spotlight. After performing at Carnegie Hall, she and her band, The Dream Drummers, are pirated off to Australia by the powerful James Masters. Now, in front of an audience of half a million, Ashely must put on the performance of a lifetime to save the world.
Book
Potential impact of 1.5 °C and 2 °C global warming on consecutive dry and wet days over West Africa
We examine the impact of +1.5 °C and +2 °C global warming levels above pre-industrial levels on consecutive dry days (CDD) and consecutive wet days (CWD), two key indicators for extreme precipitation and seasonal drought. This is done using climate projections from a multi-model ensemble of 25 regional climate model (RCM) simulations. The RCMs take boundary conditions from ten global climate models (GCMs) under the RCP8.5 scenario. We define CDD as the maximum number of consecutive days with rainfall amount less than 1 mm and CWD as the maximum number of consecutive days with rainfall amount more than 1 mm. The differences in model representations of the change in CDD and CWD, at 1.5 °C and 2 °C global warming, and based on the control period 1971−2000 are reported. The models agree on a noticeable response to both 1.5 °C and 2 °C warming for each index. Enhanced warming results in a reduction in mean rainfall across the region. More than 80% of ensemble members agree that CDD will increase over the Guinea Coast, in tandem with a projected decrease in CWD at both 1.5 °C and 2 °C global warming levels. These projected changes may influence already fragile ecosystems and agriculture in the region, both of which are strongly affected by mean rainfall and the length of wet and dry periods.
Journal Article
Snow children
A story about two snow children who discover the importance of global warming and decide to do something about it.
Book
Discussion of the “warming and wetting” trend and its future variation in the drylands of Northwest China under global warming
Since Shi et al. proposed that the climate in the drylands of Northwest China experienced a significant transition from a “warming and drying” trend to a “warming and wetting” trend in the 1980s, researchers have conducted numerous studies on the variations in precipitation and humidity in the region and even in arid Central Asia. In particular, the process of the “warming and wetting” trend by using obtained measurement data received much attention. However, there remain uncertainties about whether the “warming and wetting” trend has paused and what its future variations may be. In this study, we examined the spatiotemporal variations in temperature, precipitation, the aridity index (AI), vegetation, and runoff during 1950–2019. The results showed that the climate in the drylands of Northwest China and the northern Tibetan Plateau is persistently warming and wetting since the 1980s, with an acceleration since the 1990s. The precipitation/humidity variations in North China, which are mainly influenced by summer monsoon, are generally opposite to those in the drylands of Northwest China. This reverse change is mainly controlled by an anomalous anticyclone over Mongolia, which leads to an anomalous easterly wind, reduced water vapor output, and increased precipitation in the drylands of Northwest China. While it also causes an anomalous descending motion, increased water vapor divergence, and decreased precipitation in North China. Precipitation is the primary controlling factor of humidity, which ultimately forms the spatiotemporal pattern of the “westerlies-dominated climatic regime” of antiphase precipitation/humidity variations between the drylands of Northwest China and monsoonal region of North China. The primary reasons behind the debate of the “warming and wetting” trend in Northwest China were due to the use of different time series lengths, regional ranges, and humidity indices in previous analyses. Since the EC-Earth3 has a good performance for simulating precipitation and humidity in Northwest and North China. By using its simulated results, we found a wetting trend in the drylands of Northwest China under low emission scenarios, but the climate will gradually transition to a “warming and drying” trend as emissions increase. This study suggests that moderate warming can be beneficial for improving the ecological environment in the drylands of Northwest China, while precipitation and humidity in monsoon-dominated North China will persistently increase under scenarios of increased emissions.
Journal Article
The global warming reader : a century of writing about climate change
A collection of writings with opposing viewpoints concerning the phenomenon of global warming, including essays and excerpts by scientists, politicians, novelists, religious leaders and others.
Book
Overconfidence in climate overshoot
Global emission reduction efforts continue to be insufficient to meet the temperature goal of the Paris Agreement
1
. This makes the systematic exploration of so-called overshoot pathways that temporarily exceed a targeted global warming limit before drawing temperatures back down to safer levels a priority for science and policy
2
–
5
. Here we show that global and regional climate change and associated risks after an overshoot are different from a world that avoids it. We find that achieving declining global temperatures can limit long-term climate risks compared with a mere stabilization of global warming, including for sea-level rise and cryosphere changes. However, the possibility that global warming could be reversed many decades into the future might be of limited relevance for adaptation planning today. Temperature reversal could be undercut by strong Earth-system feedbacks resulting in high near-term and continuous long-term warming
6
,
7
. To hedge and protect against high-risk outcomes, we identify the geophysical need for a preventive carbon dioxide removal capacity of several hundred gigatonnes. Yet, technical, economic and sustainability considerations may limit the realization of carbon dioxide removal deployment at such scales
8
,
9
. Therefore, we cannot be confident that temperature decline after overshoot is achievable within the timescales expected today. Only rapid near-term emission reductions are effective in reducing climate risks.
Aiming for declining global temperatures can limit long-term climate risks compared with a mere stabilization of global warming, including sea-level rise and cryosphere changes.
Journal Article