Filtering by Subject: Climate

Large-scale Climate Modes Drive Low-frequency Regional Arctic Sea Ice Variability

Christopher Wyburn-Powell, Alexandra Jahn

Published: 2023-06-02
Subjects: Climate

Summer Arctic sea ice is declining rapidly but with superimposed variability on multiple timescales that introduces large uncertainties into projections of future sea ice loss. To better understand what drives at least part of this variability, we show how a simple linear model can link dominant modes of climate variability to low-frequency regional Arctic sea ice concentration (SIC) anomalies. [...]

Exponential life-threatening rise of the global temperature

Markus Noll

Published: 2023-05-23
Subjects: Atmospheric Sciences, Climate, Nature and Society Relations

Global temperatures are rising. This paper demonstrates for the first time that the global temperature increase has not been linear but is exponential with a doubling time of about 25 years. Both the amount of carbon dioxide produced by the combustion of fossil fuels and the amount of carbon dioxide in the atmosphere have also risen exponentially, with a similar doubling time. The exponential [...]

The Future in Anthropocene Science

Patrick W Keys, Rekha Warrier, Lynn Badia

Published: 2023-05-23
Subjects: Climate, Environmental Studies, Nature and Society Relations, Sustainability

The Anthropocene is the present time of human-caused accelerating global change, and new forms of Anthropocene risk are emerging that society has hitherto never experienced. Science and policy are grappling with the temporal and spatial magnitude of these changes, as well as the diminishing margin between science and policy itself. However, there is a gap in the transparency — and perhaps even in [...]

Strategic Logic of Unilateral Climate Intervention

Curtis M Bell, Patrick W Keys

Published: 2023-05-22
Subjects: Atmospheric Sciences, Climate, International and Area Studies, Other Statistics and Probability, Risk Analysis

Climate change and unabated greenhouse gas emissions are increasing the possibility that the world will turn to climate intervention to curb ever-increasing global temperatures. To date, most work on this topic has imagined that an international organization like the United Nations or an international coalition of states will synchronize their efforts to deploy climate intervention at ideal [...]

Carbon Utilization and Storage through Rehabilitation of Groundwater Wells

Vivek Vidyadhar Patil, Gabriella Basso, Steven Catania, et al.

Published: 2023-05-21
Subjects: Applied Statistics, Civil and Environmental Engineering, Climate, Earth Sciences, Environmental Sciences, Geochemistry, Hydrology, Longitudinal Data Analysis and Time Series, Oil, Gas, and Energy, Statistical Methodology, Statistical Models, Statistics and Probability

According to the Intergovernmental Panel on Climate Change (IPCC) of the United Nations (UN), rise in atmospheric concentration of carbon dioxide (CO2) due to anthropogenic factors is considered as the primary driver for global climate change. With almost every major corporation around the world working towards their “net-zero goals”, it is becoming increasingly important to have more [...]

Carbon Accounting is Making a Canopy Problem Look Like an Energy Problem

Denis de Bernardy

Published: 2023-05-13
Subjects: Agriculture, Climate, Forest Sciences, Soil Science

The climate narrative builds on a misleading carbon accounting framework that is making a canopy problem look like an energy problem. Farmers and loggers have been removing the plants that, until recently, kept the soil fungi alive, broke the wind, and soaked up the inevitable emissions tied to their operations. The result is wide open fields that emit a slow motion plume of carbon dioxide [...]

Spatial optimality and temporal variability in Australia's wind resource

Andrew Gunn, Roger Dargaville, Christian Jakob, et al.

Published: 2023-05-04
Subjects: Climate, Natural Resources Management and Policy

To meet electricity demand using renewable energy supply, wind farm locations should be chosen to minimise variability in output, especially at night when solar photovoltaics cannot be relied upon. Wind farm location must balance grid-proximity, resource potential, and wind correlation between farms. A top-down planning approach for farm locations can mitigate demand unmet by wind supply, yet the [...]

Climate energy balance models: two layers, orders, timescales, or regions?

B. B. Cael, Jonah Bloch-Johnson, Nicholas Lutsko

Published: 2023-04-28
Subjects: Climate

Climate energy balance models (EBMs) – simple energy-balance-based models of climate change – are widely used. The simplest “linear” EBM is deficient in capturing the behavior of complex climate models, so a “two-layer” model with an additional degree of complexity, i.e. two vertical layers, is typically used. Other additional degrees of complexity are equally plausible as well, however, and [...]

Global multi-hazard risk assessment in a changing climate

Zélie Stalhandske, Carmen B. Steinmann, Simona Meiler, et al.

Published: 2023-04-20
Subjects: Applied Statistics, Climate, Numerical Analysis and Scientific Computing, Risk Analysis

Natural hazards pose significant risks to people and assets in many regions of the world. Quantifying associated risks is crucial for many applications such as adaptation option appraisal and insurance pricing. However, traditional risk assessment approaches have focused on the impacts of single hazards, ignoring the effects of multi-hazard risks and potentially leading to underestimations or [...]

Revisiting the Climate Narrative

Denis de Bernardy

Published: 2023-04-06
Subjects: Agriculture, Climate, Ecology and Evolutionary Biology, Environmental Engineering, Environmental Studies, Food Science, Forest Management, Hydrology, Natural Resources and Conservation, Natural Resources Management and Policy, Oil, Gas, and Energy, Other Environmental Sciences, Soil Science, Sustainability, Water Resource Management

The rise in atmospheric carbon dioxide is chiefly tied to land stewardship. Farmers and loggers have removed the plants that, until the industrial era, kept the soil fungi alive, kept soil emissions nearby by breaking the wind, and soaked those up. The result is plumes of carbon dioxide. Putting plants back in would curb these emissions. Farmers and loggers could address biodiversity loss [...]

Steady decline in mean annual air temperatures in the first 30 ka after the Cretaceous-Paleogene boundary

Lauren O'Connor, Emily Dearing Crampton-Flood, Rhodri Jerrett, et al.

Published: 2023-03-06
Subjects: Climate, Earth Sciences, Geochemistry, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics, Stratigraphy

The Cretaceous-Paleogene (K-Pg) boundary marks one of the five major mass extinctions of the Phanerozoic. How the climate system responded to a bolide impact and extensive volcanism at this time over different timescales is highly debated. Here we use the distribution of branched tetraether lipids (brGDGT) from fossil peats at two sites in Saskatchewan, Canada (paleolatitude ~55°N), to generate a [...]

Did hydroclimate conditions contribute to the political dynamics of Majapahit? A preliminary analysis

Sandy Hardian Susanto Herho, Katarina Evelyn Permata Herho, Raden Dwi Susanto

Published: 2023-02-21
Subjects: Atmospheric Sciences, Climate, Earth Sciences, Environmental Studies, Geography, Human Geography, Nature and Society Relations, Physical and Environmental Geography, Physical Sciences and Mathematics, Social and Behavioral Sciences

Majapahit was the largest Hindu-Buddhist empire that ruled the Indonesian archipelago from the late 13th to mid-16th centuries CE. Until recently, there is still a lot of history surrounding the Majapahit era that has yet to be revealed. One is about how environmental factors influenced the political dynamics at that time. This study tries to discuss the influence of hydroclimate regimes using [...]

Soil moisture modulation of midlatitude heat waves

Adam Michael Bauer, Lucas R Vargas Zeppetello, Cristian Proistosescu

Published: 2023-02-11
Subjects: Atmospheric Sciences, Climate, Earth Sciences, Hydrology, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics

Heat waves are broadly expected to increase in severity and frequency under climate change. Case studies highlight a number of physical mechanisms that play a role in present-day heat waves, which typically occur during a coalescence of anomalous atmospheric and land surface conditions. However, a unified model of heat wave physics is lacking, primarily owing to difficulty in disentangling the [...]

An Updated Parametrization of Algorithms to Retrieve the Diffuse Attenuation of Light in the Ocean from Remote Sensing and its Impact on Estimates of Net Primary Productivity

Charlotte Begouen Demeaux, Emmanuel Boss, Toby K. Westberry

Published: 2023-02-10
Subjects: Climate, Oceanography, Oceanography and Atmospheric Sciences and Meteorology, Oil, Gas, and Energy, Other Environmental Sciences

We recently found a significant bias while validating frequently used ocean color algorithms retrieving the spectral diffuse attenuation coefficient (Kd(λ))(Begouen and Boss, 2022). Here we modify existing algorithms for Kd(λ) to remove the observed bias at Kd(490), and evaluate the impact on global and regional estimates of net primary production (NPP) using two different primary production [...]

Internal gravity waves generated by subglacial discharge: implications for tidewater glacier melt

Jesse M Cusack, Rebecca H Jackson, Jonathan D Nash, et al.

Published: 2023-02-03
Subjects: Climate, Oceanography

Submarine melting has been implicated in the accelerated retreat of marine-terminating glaciers globally. Energetic ocean flows, such as subglacial discharge plumes, are known to enhance submarine melting in their immediate vicinity. Using observations and a large eddy simulation, we demonstrate that discharge plumes emit high-frequency internal gravity waves that propagate along glacier termini [...]


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