Sentences with phrase «analyses atmospheric changes»

Not exact matches

This analysis is paired with highly quantitative accounts of the various links between population growth; hunger and poverty; pollution and atmospheric change; the extinction of species; and the effects of militarism.

The increased use of synthetic chemicals, including pesticides and pharmaceuticals to attack unwanted organisms, has outpaced the rates of change in rising atmospheric CO2 concentrations and other agents of global environmental change over the past 45 years, a new Duke - led analysis reveals.

Using published data from the circumpolar arctic, their own new field observations of Siberian permafrost and thermokarsts, radiocarbon dating, atmospheric modeling, and spatial analyses, the research team studied how thawing permafrost is affecting climate change and greenhouse gas emissions.

This comparative analysis of the atmospheric and ground - level temperature readings allowed Kalnay and Cai to isolate the warming effects of agricultural land - use changes and urban sprawl.

A new analysis using changes in cloud cover over the tropical Indo - Pacific Ocean showed that a weakening of a major atmospheric circulation system over the last century is due, in part, to increased greenhouse gas emissions.

For the study, Gentine and Lemordant took Earth system models with decoupled surface (vegetation physiology) and atmospheric (radiative) CO2 responses and used a multi-model statistical analysis from CMIP5, the most current set of coordinated climate model experiments set up as an international cooperation project for the International Panel on Climate Change.

Insect outbreaks such as this represent an important mechanism by which climate change may undermine the ability of northern forests to take up and store atmospheric carbon, and such impacts should be accounted for in large - scale modelling analyses.

Mike's work, like that of previous award winners, is diverse, and includes pioneering and highly cited work in time series analysis (an elegant use of Thomson's multitaper spectral analysis approach to detect spatiotemporal oscillations in the climate record and methods for smoothing temporal data), decadal climate variability (the term «Atlantic Multidecadal Oscillation» or «AMO» was coined by Mike in an interview with Science's Richard Kerr about a paper he had published with Tom Delworth of GFDL showing evidence in both climate model simulations and observational data for a 50 - 70 year oscillation in the climate system; significantly Mike also published work with Kerry Emanuel in 2006 showing that the AMO concept has been overstated as regards its role in 20th century tropical Atlantic SST changes, a finding recently reaffirmed by a study published in Nature), in showing how changes in radiative forcing from volcanoes can affect ENSO, in examining the role of solar variations in explaining the pattern of the Medieval Climate Anomaly and Little Ice Age, the relationship between the climate changes of past centuries and phenomena such as Atlantic tropical cyclones and global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measurements).

His estimate for the surface temperature rise due to a doubling of atmospheric CO2 for the zero feedback case is 0.5 C which is further reduced to 0.3 C due to negative feedback caused by the increase in planetary clouds which is in agreement with Idso's experimental analysis to determine the planet's response to a change in forcing.

The analysis revealed two major factors that could be contributing to the unusually large snowfall in recent winters — changes in atmospheric circulation and changes in atmospheric water vapor content — which are both linked to diminishing Arctic sea ice.

ozone, ozone depletion, dobson spectrophotometer, ozone ground stations, total column ozone, genera linear model, dummy coding, trend analysis, deseasonalized trends, antarctic ozone hole, hydrofluorocarbons, greenhouse gases, climate change, stratosphere, troposphere, atmospheric chemistry

Detailed analysis of the paleo record shows atmospheric CO2 levels have increased and decreased with no change in planetary temperature.

Further analysis reveals that overlying surface evaporation and atmospheric convection are modulated as a result of these forced changes to the temperature of the upper coastal Atlantic Ocean.

Requires the EPA Administrator to report to Congress by July 1, 2013, and every four years thereafter, on an analysis of: (1) key findings based on the latest scientific information relevant to global climate change; (2) capabilities to monitor and verify GHG reductions on a worldwide basis; and (3) the status of worldwide efforts for reducing GHG emission, preventing dangerous atmospheric concentrations of GHGs, preventing significant irreversible consequences of climate change, and reducing vulnerability to the impacts of climate change.

It would have to be shown that the recent temperature record can be statistically significantly distinguished from the statistically significant warming signal, which can be detected when performing an analysis that uses data over multiple decades, from the mid-1970ies to present, or from the mid-1970ies up to the time, when the alleged change in the behavior of the global atmospheric temperature is supposed to have occurred.

«(3) an analysis of the status of worldwide greenhouse gas reduction efforts, including implementation of the Safe Climate Act and other policies, both domestic and international, for reducing greenhouse gas emissions, preventing dangerous atmospheric concentrations of greenhouse gases, preventing significant irreversible consequences of climate change, and reducing vulnerability to the impacts of climate change.

He was never assigned to work on climate change and holds a doctorate in economics, not atmospheric science or climatology, and his comments on the finding were deemed to be the «product of rushed and at times shoddy scholarship,» according to a 2009 analysis by The New York Times.

The latest analysis confirms — as most atmospheric scientists have long held — that the reverse is true: Clouds change in response to temperature changes.

A more complete analysis that includes convection changes the heat balance so that adding CO2 actually causes increased atmospheric cooling.

And this all supports the analysis that the climate is much more sensitive to changes in greenhouse gas emissions and other «forcings» than the IPCC models have been saying and that a doubling of atmospheric concentrations of carbon dioxide from preindustrial levels to 550 ppm will ultimately warm the planet far more than 3 °C, as NASA's James Hansen argues (see «Long - term» climate sensitivity of 6 °C for doubled CO2).

«Whilst there are certainly other potential drivers of changes in the climate we know that over the last century we have greatly increased the CO2 concentration in the atmosphere and, through detection and attribution analyses, we know that the rising levels of atmospheric CO2 and other greenhouse gases have driven the rise in global temperature,» King said.

Climate change doubters used this analysis to support their belief that — despite climatological data which includes 800,000 year ice - core records of atmospheric carbon dioxide — humans have not affected the atmosphere by releasing billions of tons of carbon dioxide per year.

There is growing observational data, physical analysis of possible mechanisms, and model agreement that human - caused climate change is strengthening atmospheric circulation patterns in a way «which implies that the periodic and inevitable droughts California will experience will exhibit more severity...» «there is a traceable anthropogenic warming footprint in the enormous intensity of the anomalous ridge during winter 2013 — 2014 and the associated drought.»

«More and more people working in atmospheric science or on climate or ecology have had to come to grips with the fact that climate change is affecting what they're looking at,» said Dr. Kevin E. Trenberth, the head of the climate analysis division of the National Center for Atmospheric Research in Boulder, Colo., and a lead author of the panel's summary.

In these circumstances, this appears to keep the atmosphere from catastrophic temperature increases in areas where the thresholds are exceeded regardless of likely changes in atmospheric CO2, contrary to the IPCC's analyses.

And in the process, with fancy language and concepts that have little to do with the issue, completely mischaracterize the issue, and ultimately engage in irrational analysis: To wit: The issue is about an observed change that we happen to observe, so we seek to figure out what might be causing it, look to the atmospheric change and see if maybe, ah ha, that might be it...

We also carry out an energy balance analysis which indicates that that on a global scale, surface albedo and atmospheric emmissivity changes dominate over cloud changes.

1950s: Research on military applications of radar and infrared radiation promotes advances in radiative transfer theory and measurements = > Radiation math — Studies conducted largely for military applications give accurate values of infrared absorption by gases = > CO2 greenhouse — Nuclear physicists and chemists develop Carbon - 14 analysis, useful for dating ancient climate changes = > Carbon dates, for detecting carbon from fossil fuels in the atmosphere, and for measuring the rate of ocean turnover = > CO2 greenhouse — Development of digital computers affects many fields including the calculation of radiation transfer in the atmosphere = > Radiation math, and makes it possible to model weather processes = > Models (GCMs)-- Geological studies of polar wandering help provoke Ewing - Donn model of ice ages = > Simple models — Improvements in infrared instrumentation (mainly for industrial processes) allow very precise measurements of atmospheric CO2 = > CO2 greenhouse.

«With an early arrival of monsoon - like atmospheric circulation in June, the heavy precipitation that occurred in northern India was a once - in - a-century event; however, analyses of observed and simulated June precipitation provide evidence that human - caused climate change has increased the likelihood of such an event.»