Climate Letter #1585

Posted on January 3, 2020 by Carl Campbell
Scientists say they can detect fingerprints of climate change in daily weather data (ETH Zurich).  By way of explanation, “there may well be a record low temperature in October in the US. If it is simultaneously warmer than average in other regions, however, this deviation is almost completely eliminated. Uncovering the climate change signal in daily weather conditions calls for a global perspective, not a regional one…..By systematically evaluating the model simulations, they can identify the climate fingerprint in the global measurement data on any single day since spring 2012.”  The full calculation process is quite sophisticated, but it works, and the information is useful.

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Another study shows how information derived from climate change can assist in making more accurate predictions, days in advance, about the strength and size of individual storm events (Stony Brook University).  Predictions made for Hurricane Florence passed the test very well.  “More importantly, this post-storm modeling around climate change illustrates that the impact of climate change on storms is here now and is not something only projected for our future.”
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A new discovery adds to our knowledge of how ocean creatures go about absorbing and sequestering huge amounts of CO2 (Daily Press – Newport News, VA).  “The so-called carbon conveyor belt works like this: CO2 from the atmosphere diffuses into the ocean surface, where microscopic marine plants use it for photosynthesis. Zooplankton eat those plants and retreat back to the ocean deep, where they digest the food and release the carbon when they defecate.”  Phytoplankton production usually increases when ocean surfaces grow warmer, thereby helping to reduce the net effect on climate due to rising emissions from human activity.
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Streaming and social media make heavy demands on power supplies, and are rapidly growing (CBC News).  “It’s not the gadgets themselves that are drawing so much power, it’s the far-flung servers that act as their electronic brains…..The data centres, often bigger than a football field, house endless stacks of servers handling many terabytes (thousands of gigabytes) of digital traffic. Just as laptops tend to warm during heavy usage, servers must be cooled to avoid overheating. And cooling so many machines requires plenty of power.”  The climate impact is said to rival that of the airline industry, and could more than double in the next decade.
Carl

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