Science & Climate Change

Where does the scientific data confirming Climate Change and Global Warming come from?

NASA’S Goddard Institute for Space Studies

The decade from 2000 to 2009 was the warmest in the modern record. “Piecing Together the Temperature Puzzle” illustrates how NASA satellites enable us to study possible causes of climate change. The video explains what role fluctuations in the solar cycle, changes in snow and cloud cover, and rising levels of heat-trapping gases may play in contributing to climate change.

Each year, scientists at NASA’S Goddard Institute for Space Studies analyze global temperature data. The past year, 2009, tied as the second warmest year since global instrumental temperature records began 130 years ago. Worldwide, the mean temperature was 0.57°C (1.03°F) warmer than the 1951-1980 base period. And January 2000 to December 2009 came out as the warmest decade on record.

Take a look below at NASA’s collection of videos, articles and imagery designed to help tell the story of our warming world.

Our warmest decade! NASA scientists unveil their latest findings on our warming world: 2009 is tied as the second warmest year since modern record keeping began, and 2000-2009 is the hottest decade ever:

Just 5 questions! On the record….about the temperature record. NASA climatologist Gavin Schmidt talks about the Earth’s surface temperature record and the data behind it:

Sea change! The world’s oceans are a mighty force. Their natural rhythms can sometimes hide global warming and sometimes accentuate it. NASA scientists say that ocean effects currently at play could well help make 2010 the warmest year ever:

Do local bouts of cold weather mean global warming is over? No. Read more to learn why cold snaps + global warming do add up:

To read more articles, watch more videos, check interactive graphics and visualizations, you can go here:

Credit for this video: NASA/Goddard Space Flight Center

Hat tip to Best0fScience for pointing me towards this clip. Go subscribe:

You can watch an excellent series debunking Climate Change denialists here:

Climate Crock of the Week with Peter Sinclair produced here (go subscribe):

Duration : 0:5:46

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Science on a Sphere: Plate Tectonics and Paleo Animation

Science On a Sphere® is a large visualization system that uses computers and video projectors to display animated data onto the outside of a sphere. Said another way, SOS is an animated globe that can show dynamic, animated images of the atmosphere, oceans, and land of a planet. NOAA primarily uses SOS as an education and outreach tool to describe the environmental processes of Earth.

This video shows a short piece of Earth’s tectonic evolution.

To download this video and more from Science on a Sphere, go here:

Duration : 0:0:30

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Visualization of Quick sort

This video was created for

It demonstrates two comparison sorting algorithms: Bubble sort and Quick sort.
Comparison sorting algorithms are only allowed to ‘see’ the data through a sequence of pair-wise comparisons, therefore they are applicable to any type of comparable objects: numbers, strings, colored balls, etc

Bubble sort is very simple but has poor performance. A comparison sorting algorithm’s performance is usually measured by the number of comparisons it makes. Bubble sort performs on the order of n^2 comparisons to sort n elements.

Quick sort is only slightly more complicated but usually performs much better (as demonstrated in the video). It performs on average an order of n log(n) comparisons to sort n elements. This is much lower than n^2 for large values of n. However, if the algorithm makes some ‘unlucky’ choices it might require n^2 comparisons after all.

Other algorithms exist that guarantee the number of comparisons will not exceed n log(n), however, in practice Quick sort usually out-performs all other comparison sorting algorithms due to its simplicity.

If other operations other than pair-wise comparisons are allowed, then a broader range of algorithms can be used. Some of them can perform much faster than Quick sort, but they are limited to a particular type of elements, e.g., numbers is a certain range.

Duration : 0:2:56

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