Nikolai Lofving Hersfeldt

Habitable Zone Charts

Working on some updates to Part IVc and I liked how these hab zone charts came out so I figured I'd preview them. As a quick key:

Dry (high albedo): inner limit for marginal habitability wit...

Hurried Thoughts: Late Tidal-Locking Planets

Another short one on a concept I came across recently

Earth at 0.4 eccentricity (and no tilt)

Starting to look funky

Earth with 0.3 eccentricity (and no tilt)

Weirdly normal-looking isn't it

Earth with 0.2 eccentricity (and no tilt)

Climate Explorations: Day Length

Not a tuesday like usual, but wanted to get this one out before the blackout a lot of subreddits are doing next week

Turns out there's some issue with the 324x day run outputs (the days are ...

Earth with 0.1 eccentricity (and no obliquity)

Now that exoplasim supports higher eccentricity I'm running my set of them and redid this one even though it doesn't seem to have come out much different.

I did complete a 324x day run but I...

Incomplete run with 360x day length

This one crashed repeatedly it reached about 8 C; not sure why, the max temp only got up to around 30 C. I don't think I'll run it any further, though, because on further thought I think for purpos...

Hurried Thoughts: Time Dilation Loop

Something new I thought I'd try every now and then; taking a concept that doesn't quite fit in any existing post or deserves a bit more highlighting and running with it for a little bit, might help...

Update to Part IVb

This is perhaps the most substantial of these updates I'll be doing; I was never quite happy with how sparse the list of surfaces felt before and now it's a lot closer to what I originally intended...

Earth at 30x day length

Earth with 10x day length

green

Climate experiment outputs

I'll link this on the blog somewhere soon, but here's a folder with the netcdf outputs from the previous climate exploration posts, and I'll add to it as I make future posts. To keep the filesize d...

Earth with 2x day length

Earth with 5x Day Length

If you want a rainforest world, this looks like it'd do it.

The 2x day length run borked while I was out of town, so I'll restart that, and I think I said I'd do 4x before but forgot I switc...

Earth with 3-hour days (properly this time)

Finally got this to balance at the right temperature; didn't take much more CO2 (6400 ppm), just tweaking the initial conditions to warm up faster before the big glaciers can set in. Exoplasim does...

Geology and Landforms: Constructing Global Terrain

Finally worked through this one, though it's still a bit of a work in progress; there's still a lot of tweaks and extras I want to investigate, but given how long it's been I figured I'd put out th...

ProjectionPasta

A little bit of software I put together for use in a couple future posts, for reprojecting maps between different aspects and projections. Not quite as user-friendly as something like G.Projector, ...

T85 Experiments

A couple experiments with ExoPlaSim at t85 resolution (128 by 256 cells). The first is one for Earth, done by a friend at cartographer's guild, which shows a somewhat interesting mix of improvement...

Collection of climate maps across the Phanerozoic

I recently ran across this paper https://www.nature.com/articles/s41597-022-01490-4 and realized I could p...

Simulating Star Evolution with Starpasta

For some reason patreon isn't properly embedding the link so here it is:

2022-11-16 01:02:12 +0000 UTC View Post

Earth with 3-hour days (not final)

This is the latest output before I shut down the model for winter. You can see how severely the poleward heat transport has been affected, with the big ice caps cooling the whole planet; the global...

General Progress Update

Because it's been quite a while since the last post in the main series, I figure a general update on how everything's going might be nice:

1, The next major post in the main "apple pie from ...

Earth with 6-hour days

Climate Explorations: Obliquity

Earth with 12-hour days

It turns out removing the "fixedorbit=True" parameter does not actually allow for simulating high eccentricity, it just makes the model ignore the orbital parameters and run with Earth's orbit and ...

Earth at 35 and 40 Obliquity

Ran these two as quick extras to explore the rather stark transition between 30 and 45 degrees in more detail before I write up the obliquity post.

Incidentally, couple of quick tips:
2022-08-08 22:54:13 +0000 UTC View Post

Climate Explorations Supplement

This is just  short supplement explaining the collection of scripts I use for automating the process of running ExoPlaSim models.

Earth at 0.1 eccentricity

This and all the other eccentricity models have zero obliquity. Eventually I want to do some tests with combined eccentricity and obliquity, but it's a ways down the list for now.

Earth at 15, 5, and 0 Obliquity

These all ran pretty quick so here they all are at once. The last one shouldn't have any seasonal zones, but because my automated process ran with the default settings, it shows a couple along bord...