I'm in a tree

HomeProjectsWritingBookPublicationsPresentationsGithub

CHEEREIODatasetsMusicGamesEphemeraCVGoogle Scholar

Disclaimer: this website is composed of symbols and images that do not in themselves carry meaning outside of a total social situation which none of us choose.


Hi, I'm Drew Pendergrass. My low-sodium, fair trade, gluten-free website is lovingly built from whatever I decide to post online. It hosts a variety of projects, resources, and ephemera made over the years, including experimental music, my writing, a video game, a fake startup that sells logs on wheels, a stupid Chrome extension, and esoteric sorting algorithms, as well as my research papers and conference presentations in atmospheric science and related fields.

Currently, I am a doctoral student in Environmental Engineering at Harvard University, studying under Daniel Jacob, and I freelance on the side for publications including Harper's and The Guardian (for writing I can be reached at drew [at] drewpendergrass [dot] com). More importantly, I am not a closed, non-orientable, boundary-free manifold, I have absolutely no intention of running for Senate in the great state of Minnesota, and my mind's eye exists only in a figurative sense.

The latest science!

Pendergrass, D. C., S. Zhai, J. Kim, J-H. Koo, S. Lee, M. Bae, S. Kim, H. Liao, and D. J. Jacob. (2022). Continuous mapping of fine particulate matter (PM2.5) air quality in East Asia at daily 6x6 km2 resolution by application of a random forest algorithm to 2011-2019 GOCI geostationary satellite data. Atmospheric Measurement Techniques, 15, 1075–1091. PDF. Publisher's version (open access). Associated dataset available from Dataverse. Video of 15-minute oral presentation at AGU.

Beijing pollution event zoomed

Figure: Daily PM2.5 concentrations during a pollution event in the North China Plain, around Beijing (December 16-21, 2016). Predictions from the random forest algorithm (background, on 6x6 km2 grid scale) are compared to observations made on the ground (circles). We see that the model is able to reproduce even this extreme level of pollution.


You can learn more about my research on the projects page, or you can read through all of our scientific papers and presentations on their respective pages.

Order our book here!

We can move beyond the crisis Half-Earth Socialism book graphic.
Computer!

Writing spotlight

My feature on dirt, and the scientists who study it, for the June 2020 issue of Harper's Magazine: "Ground Control."

A Brief Q&A

Q. Who are you?

A. Well, to start off, I proudly possess object permanence, I have never commanded an army composed of more than 100,000 soldiers, I keep the old gods, I accept the axiom of choice, and I have no trouble distinguishing my right from my left. If you for some strange reason would like to know something substantial about me, you can check out my projects page or my CV.

Q. How can I contact you?

A. You can follow/DM me on Twitter, but I'm trying to stop using it so much, so it's best to email me at drew [at] drewpendergrass [dot] com (or the academic address in my CV). However, if your email is unpleasant, you should direct it to grievances@drewpendergrass.com, an inbox I definitely read.

Q. Why does this page keep changing?

A. This page is randomly generated by the server on each load. Most of the page's contents are not displayed on one particular load, so for the full experience reload a bunch of times.

Q. Why don't you just host this crap on Github like a normal person?

A. Github only allows static websites. I wanted my website to be different for every visitor. DrewPendergrass.com, like life itself, must always be in flux. You could say I'm an artist.

This website proudly supports Otto Neurath and the ISOTYPE picture language

Neurath

Please represent all social facts pictorially in your correspondence with the owner and proprietor of this website. Do your part to help build a pluralistic and anti-metaphysical theory of knowledge.

Some true statements

I hold no world records ... to my knowledge, there is no portrait of me that ages in my place ... I have never advocated on behalf of, or against, the Free Silver movement ... I appreciate knowledge of the outcome of a given situation ... I am not to my knowledge a victim of a mummy's curse ... I did not orchestrate the Camp David Accords ... you cannot prove I have sympathies for the former state of Burgundy ... I am not reptilian ... I have nothing to do with explosions ... I am not a substitute for a medical doctor ... I am reluctant to resort to black magic ... I have never traveled to an exoplanet ...

A Moving, and Random, Quotation

Maybe it is the nothingness that is real and our entire dream is nonexistent, but in that case we feel that these phrases of music, and these notions that exist in relation to our dream, must also be nothing. We will perish, but we have for hostages these divine captives who will follow us and share our fate. And death in their company is less bitter, less inglorious, and perhaps less probable.

-Marcel Proust, from Swann's Way


Read more here.

Play Alchemy!

"So fun you won't even need friends!"


Box Cover

Bonus Content Zone!

Three Cryptic Messages Regarding Matters of Supreme Importance

  1. Please trivialize your beliefs before they watch your ideas.
  2. The neighbors have been blamed. Soon you must eliminate the gods.
  3. All slogans will be eliminated.

One randomly-generated sorting algorithm, please!

Do you have an unsorted list of N natural numbers? Do you just hate it when programs are guaranteed to terminate? Do you get angry when algorithms do better than factorial time? Then you're in luck! The following algorithm has been generated just for you:

  1. Begin with a gaslighting strategy. Insist to everyone that the list is already in order, even if it is not. If they give up arguing with you, terminate the program. If they insist that you actually sort the list, proceed to the next step.
  2. Uh oh! You've triggered a penalty step. Before you proceed, you must perform a task. Obtain one (1) chess grandmaster. You are generous, so you let them go first. After they move their piece, move a random one of yours to a random cell on the board. If this move violates the rules of chess, flip the board in anger and start again. If it is a legal move, continue playing until either the board is flipped or checkmate. If the grandmaster has won, repeat the game. If you won, proceed to the next step. You've paid the penalty.
  3. Produce N blockbuster action films, each with an advertising budget proportional to a number in the list. For consistency, ensure each film is released in the same theaters at the same time of year. (Practically, this means the list cannot exceed a dozen or so items. If N>12, simply delete all but twelve items from the list). Read off the box office earnings for each film in order, printing the number corresponding to each.

Congratulations! Your list is now sorted. You can find a permalink to this particular algorithm here.

Computer!

Facts about LaTeX or facts about latex?

Click the line you think is about LaTeX!

Example 1

Example 2

Example 3

Score: 0 • Streak: 0

All facts lovingly taken from Wikipedia.

You should google Graham Starr