Climate worst-case scenarios may not go far enough, cloud data shows

The Guardian publishes another classic: “It’s worse than we thought” story. Modelling suggests climate is considerably more sensitive to carbon emissions than thought Oy Worst-case global heating scenarios may need to be revised upwards in light of a better understanding of the role of clouds, scientists have said. Recent modelling data suggests the climate is…

First-time direct proof of chemical reactions in particulates

Paul Scherrer Institute Researchers at the Paul Scherrer Institute PSI have developed a new method to analyse particulate matter more precisely than ever before. With its help, they disproved an established doctrine: that molecules in aerosols undergo no further chemical transformations because they are enclosed in other suspended particulate matter. In the smog chamber at…

Ice Nucleating Particles Carried From Below a Phytoplankton Bloom to the Arctic Atmosphere

Paper at Geophysical Research Letters. J. M. Creamean J. N. Cross R. Pickart L. McRaven P. Lin A. Pacini R. Hanlon D. G. Schmale J. Ceniceros T. Aydell N. Colombi E. Bolger P. J. DeMott First published: 15 July 2019 https://doi.org/10.1029/2019GL083039 Abstract and Introduction~ctm Abstract As Arctic temperatures rise at twice the global rate, sea…

Persistent plume

Analysis of massive 2017 cloud of wildfire smoke will help calibrate climate models, including modeling of nuclear winter, geoengineering University of Colorado at Boulder Thunderstorms generated by a group of giant wildfires in 2017 injected a small volcano’s worth of aerosol into the stratosphere, creating a smoke plume that lasted for almost nine months. CIRES…

Why climate predictions are so difficult

From Climate Etc. by Judith Curry An insightful interview with Bjorn Stevens. Frank Bosse provided this Google translation of an interview published in Der Spiegel  -Print-Issue 13/2019, p. 99-101.   March 22, 2019 Excerpts provided below, with some minor editing of the translation. begin quote: Global warming forecasts are still surprisingly inaccurate. Supercomputers and artificial intelligence…

Could spraying particles into marine clouds help cool the planet?

From Eurekalert Public Release: 25-Jul-2017 University of Washington The idea of geoengineering, also known as climate engineering, is very controversial. But as greenhouse gases continue to accumulate in our atmosphere, scientists are beginning to look at possible emergency measures. A new University of Washington study looks at the idea of marine cloud brightening, which a…

Silver Ants

Guest Post by Willis Eschenbach I stumbled across a lovely article about the Saharan silver ant over at phys.org. These ants have special hairs that reflect strongly in the visual and radiate strongly in the infrared. They show a photo of the ant hairs under a couple different amounts of magnification: Figure 1. Photograph from the phys.org…

Negative feedback? Declining sea ice to lead to cloudier Arctic

From the AGU weekly highlights Composite image. Data from MODIS. Credit: National Snow and Ice Data Center. See High Resolution Image Key Points: EFA method is valuable in providing quantitative assessment of feedback Decrease in sea ice leads to increase in cloud Further decline in sea ice will likely result in cloudier Arctic Arctic sea…