National Climate Assessment Released

Assorted Instrumentation

A few nice Continuous Temperature Measurement images I found:

National Climate Assessment Released
        Continuous Temperature Measurement
Image by NASA Goddard Photo and Video
This NASA visualization for the National Climate Assessment released on May 6 shows how average temperatures in the U.S. will increase 5 to 10 degrees Fahrenheit by the end of the century if carbon dioxide emissions continue current trends. It is based on a NOAA analysis of climate model data.

The National Climate Assessment is specifically focused on providing information about the impacts of climate change on the U.S. NASA supports this effort and contributes a global perspective through its satellite missions and science. NASA scientists study global and U.S. influences on temperature, including greenhouse gases, clouds, fine particle pollution and solar activity.

NASA scientists are also studying how rising temperatures in the U.S. and around the world will impact agriculture, extreme summer heat waves and public health.

Increasing carbon dioxide emissions from human activities remains the primary driver of Earth’s rising temperatures. This summer NASA will launch the Orbiting Carbon Observatory-2 (OCO-2), to make continuous global measurements of atmospheric carbon dioxide.

To read the National Climate Assessment’s take on U.S. temperature trends, visit:…

To learn more about the OCO-2 mission, visit:

To learn more about other NASA missions that contribute to understanding global temperature, visit:

To see a visualization of temperature changes projected by the National Climate Assessment, visit:

To learn more about NASA’s Earth science activities in 2014, visit:

NASA image use policy.

NASA Goddard Space Flight Center enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission.

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StepDown & StepUp
        Continuous Temperature Measurement
Image by GregRob
This is a collection of test shots in which I used to measure the variations in exposure and colour temperature of my QQ250 flash.

The image is a crop from the centre of the shot. The full scene was primarily a black fleece cloth. in the centre was also a small white cloth, and a Kodak 18% gray card.

To generate the images in the first column I stepped the exposure down from full power to 1/16 power. After adjusting the flash power output I dumped the capacitors by pressing the test button prior to taking each photo.

To generate the images in the second column I stepped the exposure up from 1/16 power to full power.

The measurements of % black were done in Photoshop Cs4 using the eyedropper measuring a 31×31 pixel average reading out in gray scale.

The measurements of colour temperature were done in Lightroom using the "White Balance" dropper measure a 9×9 sample from the centre of the grey card. The temperature measurements are given relative to the top left image.

The flash intensity dial is continuous, so there may have been some variation in my settings between the two columns.

Please Note: I am not a professional equipment reviewer, and this is the first and only studio flash I have used, so understand I am not following stringent test guidelines. This data is provided as is to help assist you can make your own decisions.

For my purposes I am finding this flash to be fine, and will likely be purchasing a second one when I can scrape together another 0.

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