JeopardyTempest

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The Hangar

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JeopardyTempest

Thu 07:34

A question in Earth Science Stack Exchange from a flier wondering whether cloud tops have changed significantly through the years. I answered thoroughly about cumulonimbus, but less informed about altostratus/cirrostratus the poster asks about.
If anyone has any input, the question is: https://earthscience.stackexchange.com/questions/27068/is-the-appearance-of-certain-kinds-of-clouds-at-altitude-of-30000-feet-a-recen

Discussion on answer by EarlGrey: At …

Imported from a comment discussion on earthscience.stackexchan...

JeopardyTempest

Dec 17, 2023 15:05

@EarlGrey you notice humidity, but I'm suggesting your ability to note it is not from the small change in the weight of the air/aerodynamical impacts.

JeopardyTempest

Dec 17, 2023 15:05

If a 1% air mass change were notable, then a 10 mb change in pressure (basically a day with high pressure instead of low pressure) would also feel as notably more difficult simply from the density (as pressure and density are a direct relationship). And you don't feel air resistance, you notice its impacts. Small differences you'd only note in very attentive special situations. A race car, maybe hard biking. But not walking. You don't notice how air resistance is slowing you down or using more gas on a cold day when going 5 mph around town, but it does have a tiny effect on top speed/gas

JeopardyTempest

Dec 17, 2023 15:05

Also note, the highest recorded representative dew point (i.e. the highest temperature there could have been 100% humidity) is 35C. (You'd find higher values only in places like saunas or a closed bathroom running a hot shower) Dew points over 25C are quite rare occurrences meteorologically. So while it's true that water content does increase in a remarkable nonlinear way, you won't experience values nearly significant in mass (in fact, because moist air is only 38% less mass than dry air, even 20C is really only nearer a 0.5% change, and even 20C moisture is never experienced in many places)

JeopardyTempest

Dec 17, 2023 15:05

Sorry, pretty sure there's a lot of issues with this answer. Air decreases in density as moisture is added (see here). And an elevation difference of just 300 ft (90 m) alters density by 1%. So if you're suggesting we can feel that with our skin (not our ear drums)... you're going to have to give concrete evidence of that ability. Because I'm not sure you've gone on a long distance road trip before in which there are very gradually changing elevations?

Discussion on answer by Chris H - UK:…

Imported from a comment discussion on travel.stackexchange.com...

JeopardyTempest

Jul 31, 2023 10:16

To the locals answering, it's probably worth remembering that taking out cash does leave the awkward situation of trying to spend it just right before leaving. So one or two limited card fees may wind up being worth the trouble compared to having cash to try to dwindle just right on your last day. My trip last year matched Araucaria... smaller towns can run into more issues like eliminating your last food options (though that also can happen aside from payment method, had a town where every option was closed by like 8). But in the biggest cities, it's probably easier to work.

Discussion on answer by Matteo: How d…

Imported from a comment discussion on physics.stackexchange.co...

JeopardyTempest

Mar 11, 2023 22:43

(Ops, please don't clean comments until ample time has passed for the thread to be transitioned to his alternative location)

JeopardyTempest

Mar 11, 2023 22:43

I'd expect if you're calculating the transformed path, you'd have both "forces" resulting in the calculation to do so. But please let's stop discussing here, and create your link if you want to go elsewhere so mods can clean up comments once you do :-)

JeopardyTempest

Mar 11, 2023 22:43

@Cleonis feel free to start a thread wherever and copy in the discussion. Then add a comment with the link, and I'd think the mods can delete most of the remaining comments and leave our initial points and the link. It sounds like you're well versed in the topic, and we're probably saying the same thing in different ways... but I don't see the great circle path being evidence of Coriolis, which is what the OP seemed to be trying to understand, but of centrifugal force (again, it would cross the equator for a non-rotating Earth too).

JeopardyTempest

Mar 11, 2023 22:43

@Cleonis: I believe you've mixed Coriolis with Centrifugal Forces, but we'll move the subsequent conversation to chat where I try to show why, and we debated the point further...

JeopardyTempest

Mar 11, 2023 22:43

That said, I am fine with not continuing in chat, will add the next comment to shorten the discussion and request mods to move inbetween comments to chat, but I believe I properly proved my point that Coriolis is a rightward deflection in NH, and Coriolis[/Eotvos] applies to any object moving with respect to the rotating body from the rotating bodies reference frame unless along the rotation axis (up/down at the Pole), and not sure there's much more to say about it. I'm still quite convinced still that Coriolis deflects right in the NH.

JeopardyTempest

Mar 11, 2023 22:43

(Sorry, before reading your comment, I realized an error in what I said on a release from the gravityless Earth... it won't shoot westward and set immediately if released, it'll rise first (because it has the linear momentum it had at the release point). Same elliptical arc, just at a different point in it. Poor error!)

JeopardyTempest

Mar 11, 2023 22:43

... you can see this by the sun's path at (the sadly somewhat defunct, but still workable) Suncalc website (disregard error). The orange arc is sun's path across the sky... if you continue that for after the sun sets behind Earth, the ellipse starts to go N of you after being due W at sunset. Then emerges the next day from the E seemingly heading S (and up into the sky); right turning curved motion. The path idea would be the same with any extra W velocity added by a cannon.) Coriolis deflects right in the NH, which is N for a W initial velocity.

JeopardyTempest

Mar 11, 2023 22:43

(If you had no gravity [and no friction, on equinox, without additional relative motions like Earth's orbit around the sun]... if you released an object from you hand, it would shoot initially west at the opposite of the local rotational speed because its linear momentum (it had from solid body rotation) would stop changing direction, and it would appear to move down into the Earth (Coriolis is 3D, with a vertical component caused by horizontal motion too, sometimes aliased as Eotvos)... but would begin to seem to be moving north immediately because of Earth's rotation...

JeopardyTempest

Mar 11, 2023 22:43

So certainly up to being wrong, and had a lot of head scratching, but I believe Coriolis due to the Earth's rotation still deflects right (in NH) from the Earth-based observer's perspective (where it's valid).

JeopardyTempest

Mar 11, 2023 22:43

At the "high" point (no idea the technical term!) on the orbit (whether + or - inclination (I don't know which is which!)), which would be the point where it's moving due west in this retrograde orbit... it will be hard to tell whether Coriolis shifted left or right (because it subsequently reshows up directly behind you)... but at a point "below" that "high point" in the NH... the next pass it winds up further north of you than the velocity suggested it would (or further south/left in the SH).

JeopardyTempest

Mar 11, 2023 22:43

@Cleonis: (Sorry, my 1st was just as late, 1 yr!) I certainly had to think this over (I'm not too heavily astronomy, only a meteorologist working on long-ago understanding)... and can always be wrong! But after a lot of pondering, I believe the changes in direction you are talking about due to the great circle path are centrifugal forces (they happen regardless of whether the Earth rotated). (If there were no gravitational force, the object would continue off to space rather than change direction centripetally/fugally). The Coriolis causes the shifts in each satellite pass.

JeopardyTempest

Mar 11, 2023 22:43

Just to note for those reading Cleonis' comment... his visual of a giant supercannon doesn't speak to Coriolis (indeed a westward shot in the NH would mean a deflection away from the equator (towards the north))

The Observatory

general chat for astronomy.stackexchange.com

JeopardyTempest

Jan 21, 2023 02:04

Q: What oxidised the soil on Mars?

What exactly was it in the ancient Martian atmosphere that made it red? Was it water, molecular oxygen or something else?

What on Earth?

General discussion for earthscience.stackexchange.com

JeopardyTempest

Jul 29, 2022 08:24

@Universal_learner praying and hoping things get better for you. Keep making good choices and looking for the help that will bring peace. As with many friends the choices to medicate seemed to make things worse. All I can offer to help you is that there is a God, and He does love you and want to make sense of your struggles. Miss when things were a simpler time. And hope your life will improve friend.

JeopardyTempest

Jul 9, 2022 13:07

Here's something neat: timeanddate.com/news/astronomy/…

JeopardyTempest

Jun 12, 2022 07:09

Q: Are the rivers in my fantasy map accurate?

Color legend: The brown shapes are hills, the darker the brown the higher the mountains and the highest peaks I've made white. They are mostly clustered on the east and west edges. The green shows forests and the darker green is jungle. I am creating my first map for a world I am building, but I...

map-making rivers maps

JeopardyTempest

Mar 8, 2022 00:42

Seems a few of the ones who used to participate are gradually leaving, and the quality/passion as a whole is gradually fading :( Oh well, there's more to life indeed! But do know you had some reasonable contributions on occasion, something I certainly lack on many SE sites :)

JeopardyTempest

Mar 5, 2022 03:18

@Universal_learner sad to hear that, though it's best to do what's best for you :) If I knew your Twitter, I'd follow you, though I am more of a lurker than a poster around those parts :) Once again, praying for strength. The living God will see you through yet. Hang in there. You do have friends. And I know it's hard, I'm not in a great place either, and my life often a mess. But we press on, for we still believe better can come of our lives.

JeopardyTempest

Mar 4, 2022 05:30

Stick with it all, praying things get better.

JeopardyTempest

Mar 4, 2022 05:30

Sounds complicated. Hope you can find the peace not to stress over what's happening elsewhere, only because we personally can do very little about it.

JeopardyTempest

Mar 3, 2022 07:00

Praying for you brother.

JeopardyTempest

Mar 3, 2022 07:00

Hang in there.

JeopardyTempest

Mar 3, 2022 07:00

(I've been up for 34 hours or so, so know you're not the only who struggles sometimes. Bit different, but I know what it's like to just struggle to do the basics sometimes :-/ )

Discussion between ecohydrol and Jeop…

Imported from a comment discussion on earthscience.stackexchan...

JeopardyTempest

Jul 28, 2022 19:33

That's always the challenge, the balance for everyone between time and benefit. 6 billion pages of documentation and a 24/7 help desk would be great for every piece of code... but yeah, practicality! But I count SE as a whole a blessing (both as a resource when in need, and for interesting education) even if sometimes imperfect

JeopardyTempest

Jul 28, 2022 19:31

I haven't had a ton of success getting questions answered on the GIS forum. Then again, they're complex, and perhaps poorly formed.

JeopardyTempest

Jul 28, 2022 19:30

I did some fiddling with the river longplot, but got fairly stuck at gis.stackexchange.com/questions/415748/…

JeopardyTempest

Jul 28, 2022 19:30

earthscience.stackexchange.com/questions/13626/… was my question about the plot, which is called a river long plot apparently.

JeopardyTempest

Jul 28, 2022 19:29

earthscience.stackexchange.com/questions/9682/… was my question about the flood translation estimation (got a pretty good answer)

JeopardyTempest

Jul 26, 2022 20:58

Would love to learn more about the basics of hydrology, always found it quite interesting (had a couple questions here somewhat connected, one on rough approximation after dam failure, another on river plots I might someday wish to make in GIS). So will be excited if you stick around for hydrology topics in general... and know well that poor code documentation/answers is a huge hindrance in the sciences, so hopefully it really helps people use your model. Thanks for the positive response :)

JeopardyTempest

Jul 26, 2022 20:58

@ecohydrol glad to try to help :) And glad for once someone chose chat! (I'm always suggesting chat, it's underutilized for back and forth discussion). Yeah, understand that sometimes programming questions don't work out as ideally as hoped... I've been involved with a few myself! I don't think we have much in the way of hydrologists/hydrological scientists on the site, so you exciting for you to join!

JeopardyTempest

Jul 26, 2022 19:27

Either way, answers shouldn't themselves be a chain or back and forth Q/A, nor really should the question keep being heavily revised. It's hard to follow. It was hard for me to understand what was going on with this question for a while. While it's not a hugely common practice, migrating a Q/A solution over from other locations/conversation/etc can be a fair thing, have done so myself, and done well I believe can be a very useful problem solver for people using your code. Or if you guys decide SE isn't really flexible enough for your needs, another option may be Gitter

JeopardyTempest

Jul 26, 2022 19:27

It may seem a pain to separate out the questions like this... but in the long run it'll help more people with their problems. Long complex investigations of very specific problems typically tend to both be less applicable to users, and less likely to be followed by a reader due to the complexity. Separating each out can solve the one user's issue, and many others who may've not ran into the first issue, but have the second, or such. Not all questions work here, and it can take some work to maintain the quality of questions... but I think it could be a great place for such answers.

JeopardyTempest

Jul 26, 2022 19:27

The initial asker could comment the "I had not recalculated the Q/h boundary so now that I did this, it seems to get past the beta error originally mentioned, but I have new problems on water level being exceeded on 9 grid points" on the A... which would include the link to the new question about that. Then there a link to another question about the separate hyperthreading issue.

JeopardyTempest

Jul 26, 2022 19:27

The user could use the results from that to slightly modify the Q with additional details. Or if the results completely change the direction of the Q (for instance a generic error message instead became a much more specific error indicating a complete logic rewrite was needed), or had a bunch of things it itself could be, only one of which is dived down, it might be better to then alter the original Q down to simple basic such as what could an error message like this might mean... then make a separate question more into the intricate details (could add links in each question to the other).

JeopardyTempest

Jul 26, 2022 19:27

@ecohydrol typically here the goal is to keep it to one question and answer, and avoid evolving discussion. So the advice I'd suggest for your example question is: your answer about "Advice given: Try running the MIKE HYDRO model on its own... also check the log file" would likely be a comment to the question as written instead of an answer, as it doesn't provide the solution only a method of investigating the problem. Or could maybe wind up with a separate question about basic techniques to solve errors with the MIKE HYDRO.

Discussion on answer by DJClayworth: …

Imported from a comment discussion on law.stackexchange.com/qu...

JeopardyTempest

Jul 14, 2022 19:52

@manassehkatz-Moving2Codidact: The problem is that... there are often points on a license... ok, trading your integrity for an extremely small chance that you might not get points on your license... the main points are loosely unchanged... that the expected value of withholding the truth is fairly low for an individual, and that the costs of losing integrity personally and to society from such collective attitudes is worse in the long run (in many tangible ways, and maybe even more intangible ones)

Discussion on question by Weiss: Worl…

Imported from a comment discussion on earthscience.stackexchan...

JeopardyTempest

Jun 24, 2022 08:04

It sounds like you're making progress, but long threads of comments and changes will usually be downvoted/closed/not answered in the long run as they tend not be of any help to a wider range of people, so you're a bit lucky. Try to formulate your question well and concisely, persist a little while at solving subsequent problems, and you'll find you may get a bit more response sometimes... though still the most specific questions to high education research and/or your specific situation's challenges sometimes won't get answers because few have expertise or the time :)

JeopardyTempest

Jun 24, 2022 08:04

Stack Exchange isn't a great place for solving real complex issues. You could try the chat. But sometimes you'll need to persevere... I've struggled with that too, but sometimes there just isn't easy/any answers to every need. Drives me nuts too. I'd suggest speaking to others in your department, user groups, or just stumbled upon Gitter, as potential options to more often solve problems like these... though of course if we're always taking and never giving, it can wear on people too!

JeopardyTempest

Jun 24, 2022 08:04

Do try to keep Stack Exchange questions to a more question-answer format rather than an adapt and change and discuss. It's important to try to put key details in the question (ask yourself what others may need to know... I likewise was wondering what resolution you were looking for). I often need help related to topics like these... but get lost in the question because there was so much back and forth and changing question and answer. Add key details others ask for, but please don't update questions with heavily revised code and such :)

JeopardyTempest

Jun 24, 2022 08:04

But keep pressing on. So frustrating each issue, but at least it's a little relief for a moment when you beat each issue... until the next one surfaces!

JeopardyTempest

Jun 24, 2022 08:04

I've only been dabbling with regular shape files recently, so not sure I'm much help there. But I also had a fair bit of frustration trying to install certain packages (some of my trouble ended up being I wasn't downloading the proper wheel for my Python version). Perhaps try asking about it on the computing forums, or are you sure it's unviable? Or maybe can try talking to me and others more about the problems more in the forums... perhaps if there's no other avenue, someone could extract for you if you can't install. I too am trying to work through some projects and keep meeting barriers :-/

JeopardyTempest

Jun 24, 2022 08:04

I too have had use for that, and struggled to get a great resolution dataset I could dl worldwide easily/quickly. But I'd think geotiff will be it, as elevation products I found were generally in that, as it's just point by point data that happens to be in imagery format as far as I understand it. But I think it's fairly easy to extra elevation if you have the geotiffs with like qgis or probably even like python/R/etc.

The Skunk Works

To the optimist, the glass is half full. To the pessimist, the...

JeopardyTempest

Apr 20, 2022 23:37

Q: Effects of Dredging Estuary Channel on Water Flow

Is it possible to make some generalizations about the hydrographic effects of dredging a channel into an estuary? Or is it too complex a problem and each case must be considered independently? Let me pose a what may be a fairly common scenario: an estuary is connected to the ocean via a channel w...

oceanography hydrology tides

JeopardyTempest

Apr 20, 2022 23:37

Someone suggested we cross-note this here in case any ESE members have expertise in such a topic