The Rainmakers

Guest Post by Willis Eschenbach For more than a decade now I’ve been saying something without getting much agreement, which was: “When you cut down the trees, you cut down the clouds”. I based my saying on my own experience, first growing up in a ponderosa pine and fir forest, and later living in a…

Estimating Cloud Feedback Using CERES Data

.Guest Post by Willis Eschenbach As usual, Dr. Judith Curry’s Week In Review – Science Edition contains interesting studies. I took a look at one entitled “Cloud feedback mechanisms and their representation in global climate models“, by Ceppi et al., hereinafter Ceppi2017. The paper looks at the changes in the radiative effects of clouds. From…

Thin tropical clouds cool the climate

From STOCKHOLM UNIVERSITY: Thin clouds at about 5 km altitude are more ubiquitous in the tropics than previously thought and they have a substantial cooling effect on climate. This is shown in a recent study by researchers from Stockholm University and the University of Miami published in Nature Communications. The cooling effect of mid-level clouds is…

Cosmic Disconnections

I read yesterday that someone had supposedly provided evidence in support of Svensmark’s hypothesis that cosmic rays affect the weather. So I went to look it up. The study is called Cloud cover anomalies at middle latitudes: links to troposphere dynamics and solar variability, by S. Veretenenkoa and M. Ogurtsova, paywalled here. Let’s look at this…