Category Archives: diffusion processes
Update, 2019-10-28 00:34 ET I have compiled notes from the talks above, and from the audience Q&A and documented these in a Google Jam here.
An article by Suilou Huang for catatrophe modeler AIR-WorldWide of Boston about rejection sampling in CAT modeling got me thinking about pulling together some notes about sampling algorithms of various kinds. There are, of course, books written about this subject, … Continue reading
Drs Carol Anne Clayson and Alec Bogdanoff examined evaporation from the ocean surface and energy exchange at the boundary layer of the ocean surface, respectively. See also the interactive illustration here. (The above is from Dr Carol Anne Clayson’s personal … Continue reading
Response to a paper by Hermann Harde, from Ken Rice at … And Then There’s Physics. Dr Rice cites two other responses as well: One by Gavin Schmidt at RealClimate. One from 2011 by Gavin Cawley from the University of … Continue reading
I have made an important update to an earlier post here, Getting back to 350 ppm CO2: You can’t go home again. The message, essentially based upon recent work Tokarska and Zickfield on one hand, and by The Global Carbon … Continue reading
Your CO2, my CO2 doesn’t remain with you or me, but mixes broadly and thoroughly over the planet at large. So, we all share responsibility for the damage. Credit: NASA And brought to you by OCO-2.
(Update of this piece, included below.) (Major update of this piece included below.) You can’t. It’ll cost much more than 23 times 40 times the Gross World Product to do it. And, in any case, you need to go to … Continue reading
(Click on image to see a bigger version of this figure. Use your browser Back Button to return to this blog.) The town of Sharon, MA, has a water problem. Click on the link and see Paul’s presentation about it. … Continue reading
I’m currently studying random walk and diffusion processes and their connections with random fields. I’m interested in this because at the core of dynamic linear models, Kalman filters, and state-space methods there is a random walk in a parameter space. … Continue reading
Brad Plumer at Vox writes on take-up patterns of rooftop solar based upon a large dataset from SolarCity. The full article is available at the SolarCity site. Mr Plumer combines it with a report on other studies of solar adoption … Continue reading
Excerpt, from NASA: Phytoplankton are the grass of the sea. They are floating, drifting, plant-like organisms that harness the energy of the Sun, mix it with carbon dioxide that they take from the atmosphere, and turn it into carbohydrates and … Continue reading
I have just created the Massachusetts Solar Suburbs Google group. It’s Welcome Message reads: Welcome to the Massachusetts Solar Suburbs! This group exists to provide a forum for owners of solar installations, typically residential, or serving residences, to share their … Continue reading
November Hottest Ever, and Christmas Likely To bring Record Warmth in The East (Dan’s Wild Wild Science Journal; AGU Blogosphere)
The long-range guidance is showing strong indications that the incredible December warmth in the Eastern U.S. will continue to the end of the month. A blast of cold air will arrive later this week,… (Click on image for larger map, … Continue reading
Click the image above to see a video from the GFDL CM2.6 climate model. This is NOT this year’s El Nino. When you start a climate model in which the ocean and the land and atmosphere can inte… Source: El … Continue reading
Good to review the basics once again. Professors Dave Archer and Ray Pierrehumbert do, in my opinion, some of the best introductions: Infrared radiation and planetary temperature.
Originally posted on Climate Denial Crock of the Week:
A nahcolite from the Eocene Green River Formation. Credit: Timothy Lowenstein Phys.org: Ancient climates on Earth may have been more sensitive to carbon dioxide than was previously thought, according to new…
Part 1 of this series introduced the idea of ctDNA and its use for detecting cancers or their resurgence, and proposed a scheme whereby relative concentrations of ctDNA at two or more sites after controlled disturbance might be used to … Continue reading
No turning back: On the effectiveness of artificially removing emitted CO2 from atmosphere for remediating climate disruption
A new paper, by Tokarska and Zickfeld, just published in the Institute Of Physics (“IOP”) Environmental Research Letters examines the question of what happens to climate change and disruption should, at some time, we collectively decide it’s too bad and … Continue reading
New Paper Shows Global Climate Model Errors are Significantly Less Than Thought (Dan’s Wild Wild Science Journal)
New Paper Shows Global Climate Model Errors are Significantly Less Than Thought – Dan's Wild Wild Science Journal – AGU Blogosphere. The paper is here, unfortunately behind a paywall. I wonder if they looked at the temperature distributions’ second moments? … Continue reading
(Hat tip to Susan Stone.) The graphic below shows sea surface temperature anomalies relative to the 1971-2000 baseline First data are courtesy of the Climate Reanalyzer, a joint project of the Climate Change Institute at the University of Maine, and … Continue reading
Regulating Government. This post is about governments — with the advice of big banks — gaming pension accounts so they appear more solvent than they are.
Why decentralized electrical power has to win, no matter what Elon Musk says, and utilities are doomed
NOAA temperature record updates and the ‘hiatus’. No doubt there’ll be, as Dr Schmidt says, a howl of protests that the data are “being manipulated”. There’s more discussion by Professor Mann. But, more to the point, it looks like we’re … Continue reading
This is from Rabett Run. The American Physical Society (“APS”) is working on a draft statement on climate change. Compared to other scientific organizations (and my own primary society, the American Statistical Association), it’s sure taking them a long time. … Continue reading
Today was a big day at the U.S. National Academy of Sciences (“NAS”). The Academy released two important climate reports, each dealing with one of two categories of global countermeasures for the effects of dumping unprecedented amounts of carbon dioxide … Continue reading
Originally posted on …and Then There's Physics:
I thought I might write about the new paper by Jochem Marotzke and Piers Forster called Forcing, feedback and internal variability in global temperature trends. It’s already been discussed in a Carbon…
Stable distributions or Lévy -stable models is a class of probability distributions which contains the Gaussian, the Cauchy (or Lorentz), and the Lévy distribution. They are parameterized by an which is . Values of of 1 or less give distributions … Continue reading