Daily Archives: August 7, 2014

How about starting in Iraq to solve the world’s water problems?

These children should not be allowed to die or be killed.

“A humanitarian tragedy is looming in northwestern Iraq, where up to 25,000 children, mostly from the minority Yazidi community, are among those who fled ahead of advancing Islamic State of Iraq and the Levant (ISIS) jihadists and are now stranded without water or supplies in arid, mountainous terrain.” click here

Increase in green house gasses found to decrease longwave infrared radiation

There is a good discussion of this paper here (The Hockeyschtick)

Gero, P. Jonathan, David D. Turner, 2011: Long-Term Trends in Downwelling Spectral Infrared Radiance over the U.S. Southern Great Plains. J. Climate, 24, 4831–4843.  doi: http://dx.doi.org/10.1175/2011JCLI4210.1

A trend analysis was applied to a 14-yr time series of downwelling spectral infrared radiance observations from the Atmospheric Emitted Radiance Interferometer (AERI) located at the Atmospheric Radiation Measurement Program (ARM) site in the U.S. Southern Great Plains. The highly accurate calibration of the AERI instrument, performed every 10 min, ensures that any statistically significant trend in the observed data over this time can be attributed to changes in the atmospheric properties and composition, and not to changes in the sensitivity or responsivity of the instrument. The measured infrared spectra, numbering more than 800 000, were classified as clear-sky, thin cloud, and thick cloud scenes using a neural network method. The AERI data record demonstrates that the downwelling infrared radiance is decreasing over this 14-yr period in the winter, summer, and autumn seasons but it is increasing in the spring; these trends are statistically significant and are primarily due to long-term change in the cloudiness above the site. The AERI data also show many statistically significant trends on annual, seasonal, and diurnal time scales, with different trend signatures identified in the separate scene classifications. Given the decadal time span of the dataset, effects from natural variability should be considered in drawing broader conclusions. Nevertheless, this dataset has high value owing to the ability to infer possible mechanisms for any trends from the observations themselves and to test the performance of climate models.

Click here for full paper (fee).