Two weeks in the life of a sunspot

Public Release: 4-Aug-2017 From Eurekalert                NASA/Goddard Space Flight Center VIDEO: On July 5, 2017, the Solar Dynamics Observatory watched an active region — an area of intense and complex magnetic fields — rotate into view. During its 13-day trip across… view more   Credit: NASA’s Goddard Space Flight Center/SDO/SOHO/CCMC/SWRC/Genna Duberstein, producer On July 5, 2017,…

Monster Solar Minimum Approaching?

Monster minimum or short solar cycle? Guest essay by David Archibald This recent post was on the fact that the Sun’s EUV emissions had fallen to solar minimum-like levels well ahead of solar minimum. The implication was that the Solar Cycle 24/25 minimum was either going to be very deep and prolonged, or that Solar…

The Solar Harbinger

Guest essay by David Archibald The people of Canberra are the richest in Australia so they voted in a provincial government that proved how virtuous they were by increasing the proportion of their power supply that came from wind and solar sources. As a consequence, the cost of power went up and the people of…

Closely Coupled: Solar Activity and Sea Level

Guest essay by David Archibald From a post a couple of days ago: “an F10.7 flux above 100 causes warming and below that level causes cooling.” Greg asked “Can you prove that?” I already had in this WUWT post from 2012. But it is worth revisiting the subject because it answers the big question –…

Thus It Begins

Guest essay by David Archibald Back in late April, European wine growers were hit by the most damaging frost since 1991. That frost affected vines as far south as Tuscany. More recently it is the western Corn Belt that has been affected by late Spring frost. The following two figures show damage to crops from…

Indirect Effects of the Sun on Earth’s Climate

Guest essay by Mike Jonas “And what might they be?” – Dr. Leif Svalgaard For a long time, I have been bitterly disappointed at the blinkered lopsided attitude of the IPCC and of many climate scientists, by which they readily accepted spurious indirect effects from CO2-driven global warming (the “feedbacks”), yet found a range of…