ScienceCasts: No Turning Back – West Antarctic Glaciers in Irreversible Decline


A 2014 study study led by NASA researchers shows that half-a-dozen key glaciers in the West Antarctic Ice Sheet are in irreversible decline. The melting of these sprawling icy giants will affect global sea levels in the centuries ahead.

Read more http://science.nasa.gov/science-news/science-at-nasa/2014/12may_noturningback/

On the Influence of Carbonic Acid in the Air Upon the Temperature of the Ground

In 1896, Svante Arrhenius published below study on the greenhouse effect, the required carbon dioxide gas concentrations for change, and temperature variations deriving from mean, and processes in the climate system which draw down CO2, and the effects of CO2 on the climate on geological times, and elaborated on possible timescales of climate change. Arrhenius estimated based on the CO2 levels at…

Sea Level Rise Projections until 2100, a nonlinear response?

Past sea level rise is not captured by models yet, in particular the response from ice sheets in Antarctica due to global warming. Projections therefore can often be regarded to potentially underestimate future sea level rise. For example, Overpeck et al. (2006), and Hansen (2007) suggest possibilities which could eventually lead to a nonlinear response…

Climate denial and climate communication #Denial101

ClimateProgress  What’s the best way to show a climate change denier the error of their ways? A new online course answers this question for the masses. Hint: it’s not lobbing an endless stream of scientific evidence that proves human-driven climate change. While this approach may be cathartic, telling those who refuse to accept climate science…

NASA, NOAA Find 2014 Warmest Year in Modern Record

The year 2014 ranks as Earth’s warmest since 1880, according to two separate analyses by NASA and National Oceanic and Atmospheric Administration (NOAA) scientists. The 10 warmest years in the instrumental record, with the exception of 1998, have now occurred since 2000. This trend continues a long-term warming of the planet, according to an analysis…

Royal Society: An introduction to climate change in 60 seconds

Published on Dec 10, 2014: Climate science explained in 60 seconds by the Royal Society and the US National Academy of Sciences. During the last 200 years, human activities such as the burning of fossil fuels have increased concentrations of CO2 in the atmosphere by 40%. If unchecked, continuing emissions will warm up the planet…

ScienceCasts: The Cloudy Future of Arctic Sea Ice

As climate change continues to hammer Arctic sea ice, pushing back its summertime boundaries to record-high latitudes, NASA is flying an innovative airborne mission to find out how these developments will affect worldwide weather. NASA: Oct 15, 2014: Climate change is a global phenomenon, yet Earth scientists are keeping a wary eye on one place…

NASA: Four Decades of Sea Ice From Space

NASA: One of the most visible signs of climate change in recent years was not even visible at all until a few decades ago. The sea ice cap that covers the Arctic Ocean has been changing dramatically, especially in the last 15 years. Its ice is thinner and more vulnerable – and at its summer minimum…

Novel climate proxy reveals CO2 content of Earth’s atmosphere, of the past 400 million years

The study New constraints on atmospheric CO2 concentration for the Phanerozoic (DOI: 10.1002/2014GL060457), by Peter J. Franks, Dana L. Royer, David J. Beerling , Peter K. Van de Water, David J. Cantrill, Margaret M. Barbour, and Joseph A. Berry, estimates CO2 in Earth history based on a new climate proxy. Estimates are in particular based…

Hydroxyl Radicals In Our Atmosphere – An Animated Explanation

Published on Oct 30, 2013 A simple yet effective clip explaining hydroxyl creation in the Earth’s atmosphere, what they do as “nature’s broom” and the benefit of their existence. Related Wikipedia: Hydroxyl RadicalThe hydroxyl radical is often referred to as the “detergent” of the troposphere because it reacts with many pollutants, often acting as the first step to their…

The Albedo Effect Explained With The DaisyWorld Model (NASA)

NASA: A look at how the historic DaisyWorld model illustrates earth science concepts, such as albedo and feedback loops. This webshort was produced as an educational tie-in with the Science on a Sphere feature LOOP. Related Wikipedia: Albedo Earth-orbiting satellites see Arctic surface darkening faster The retreat of Arctic sea ice is diminishing Earth’s albedo, or reflectivity,…