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garrettdreyfuson Shrinking freshwater availability increasing land contribution to sea level rise

I very much like your categories point here by the way!

garrettdreyfuson Shrinking freshwater availability increasing land contribution to sea level rise

Hi,

I appreciate the effort in your comment. I think upon further reflection my simpler objection is calling freshwater loss the main driver of sea level rise when the journal article and news article don’t. Also I would note this is only one study.

garrettdreyfuson Freshwater loss from land is the lead driver of sea-level rise

Although to your point it does vary alot over different windows of time.

garrettdreyfuson Freshwater loss from land is the lead driver of sea-level rise

See table 9.5

https://www.ipcc.ch/report/ar6/wg1/chapter/chapter-9/

garrettdreyfuson Freshwater loss from land is the lead driver of sea-level rise

The study you cite is talking about sea level rise since 1900 which is a very different story.

The IPCC section “9.6.1.1 Global Mean Sea Level Change Budget in the Pre-satellite Era” says Since SROCC, a new ocean heat content reconstruction (Section 2.3.3.1; Zanna et al., 2019) has allowed global thermosteric sea level change to be estimated over the 20th century. As a result, the sea level budget for the 20th century can now be assessed for the first time. For the periods 1901–1990 and 1901–2018, the assessed very likely range for the sum of components is found to be consistent with the assessed very likely range of observed GMSL change (medium confidence), in agreement with Frederikse et al. (2020b; Table 9.5). This represents a major step forward in the understanding of observed GMSL change over the 20th century, which is dominated by glacier (52%) and Greenland Ice Sheet mass loss (29%) and the effect of ocean thermal expansion (32%), with a negative contribution from the LWS change (–14%). While the combined mass loss for Greenland and glaciers is consistent with SROCC, updates in the underlying datasets lead to differences in partitioning of the mass loss.”

Edit: by a different story I mean a different story from what is the leading driver of sea level rise. Sea level rise from ice melt was larger since 1900 because sea level rise in general was less fast back then and global mean temperature rise was much smaller so thermosteric sea level rise played less of a role. Thermosteric sea level rise is larger than ground water factors, both will be eclipsed by ice melt in the upcoming century.

I would note the authors pointedly do not call it the leading driver of sea level rise.

garrettdreyfuson Shrinking freshwater availability increasing land contribution to sea level rise

Sorry I am referring to HN submission title not the article title

garrettdreyfuson Shrinking freshwater availability increasing land contribution to sea level rise

My reading of Figure 6 https://www.science.org/doi/10.1126/sciadv.adx0298 suggests that this study still has thermosteric effects making up the majority of sea level rise.

I also highly recommend reading up on the GRACE satellite used in this study it is amazing https://gracefo.jpl.nasa.gov/resources/50/how-grace-fo-measu...

garrettdreyfuson Shrinking freshwater availability increasing land contribution to sea level rise

I’m not sure this title is completely correct

“The researchers identified the type of water loss on land, and for the first time, found that 68% came from groundwater alone — contributing more to sea level rise than glaciers and ice caps on land.”

They are saying the leading loss of water loss is from ground water. The largest contributor to sea level rise I would guess is still thermosteric sea level rise due to the ocean becoming warmer and less dense

See ipcc https://www.ipcc.ch/report/ar6/wg1/chapter/chapter-9/

9.6.1 Global and Regional Sea Level Change in the Instrumental Era

In particular, Cross-Chapter 9.1, Figure 1 | Global Energy Inventory and Sea Level Budget. Panel b

EDIT: @dang could the submission title be changed to the article or journal article title?

“New global study shows freshwater is disappearing at alarming rates”

“Unprecedented continental drying, shrinking freshwater availability, and increasing land contributions to sea level rise”

garrettdreyfuson Loss of key US satellite data could send hurricane forecasting back 'decades'

I recommend readng this article https://michaelrlowry.substack.com/p/critical-hurricane-fore...

garrettdreyfuson Loss of key US satellite data could send hurricane forecasting back 'decades'

https://michaelrlowry.substack.com/p/critical-hurricane-fore...

“The ATMS sounder that remains is far inferior to hurricane forecasters than the SSMIS instrument the Department of Defense is discontinuing. Unlike the SSMIS which scans at a continuous resolution, the quality of the ATMS degrades considerably on its edges, rendering the sounder useless for most operational hurricane forecasts. The example below shows the difference between the scans from both instruments for Hurricane Erick last Wednesday, June 18th.”

There is also a useful figure included.

garrettdreyfuson Loss of key US satellite data could send hurricane forecasting back 'decades'

https://www.preventionweb.net/news/which-hurricane-models-sh...

HAFS is often the best

https://www.noaa.gov/news/new-noaa-system-ushers-in-next-gen...

European models assimilate in data from US satellites and vice versa

garrettdreyfuson Mark Cuban offers to fund former 18f employees

This post says very little and you can look up almost all public salaries.

garrettdreyfuson The electronic ocean model (1960)

It is actually a single layer ocean model. It uses what are called the shallow water wave equations.

It can be thought of as a grid of resistors capacitors and inductors through which voltages behave flow similarly to water levels. Different capacitances, resistances, and inductivenesses(?) model the changing wave speed and bottom friction to do the depth and bottom friction at each grid cell you are considering. Voltage=water level

By arranging the circuit into the shape of a real world basin and adding voltages that match real world atmospheric forcings you can predict storm surge

garrettdreyfuson We need to take CO2 out of the sky

>> In a closed system, you can't reverse something by using less energy than that which went into creating it.

>> Basic physics. From that principle there's only one possibly conclusion when it comes to climate change: We can't do a damn thing about it.

I agree that the climate crisis is grim and that geoengineering is not a cure all. I do not think your reasoning makes much sense. Say it takes 100x as much energy to capture C02 as to create it. If the energy it takes does not warm the atmosphere it is not a problem. For example, if solar energy was removed to C02 it would not contribute to the warming of the planet either by directly releasing heat or a greenhouse gas.

garrettdreyfuson Innovative container ship features hemispherical bow

How will this effect Docker?

garrettdreyfuson Waitin' (on Leiningen)

I would just like to thank Swannodette for all the amazing work he has done for Clojure and its community. You are the best.

garrettdreyfuson Cornell to Digitize a Rich Hip Hop Archive

J Dilla is truly a legendary musician.

garrettdreyfuson Cornell to Digitize a Rich Hip Hop Archive

I mean no offense, but it is a very futile and somewhat worthless effort to insult a genre of music and to some extent those who listen to it on a site like Hacker News. I would also encourage you to branch out and listen to different kinds of hip hop, for hip hop like any genre is very diverse (some songs don't event have "mindless unintelligible lyrics"). No harsh feelings but stay classy ;)

garrettdreyfuson Korg volca sample SDK – a sample and sequence encoding library

Yeah preach! This is so awesome!

garrettdreyfuson Ask HN: What are the best music technology forums/blogs?

Equipment and hardware specifically samplers and synths. Thanks for the reply!

garrettdreyfuson Hextris

Hey guys, one of the developers here. We've heard many people talking about the differences in speed. Previously we had based speed on the framerate driven by request animframe. We realised this was a mistake so we've switched to time based now. It just got merged and should be updated in the apps pretty soon.

garrettdreyfuson Hextris

This is fixed on the dev branch we are pushing and rebuilding.

garrettdreyfuson Ask HN: Best way to start with functional programming?

I started Clojure this week. It's really fun and it's syntax doesn't boggle my brain as much as Haskell's.

garrettdreyfuson Just Use Sublime Text

I don't understand the need to write an article which criticizes a matter of preference. EDIT: I am also astonished at the authors attack on those who operate the vim wiki. He suggests that those who operate the site have personality disorders and are robots and emotionless coders. Come on.

garrettdreyfuson Ask HN: Just bought a Pi...now what?

I've been loving this project http://www.woutervanwijk.nl/pimusicbox/. It allows me to stream spotify through my speaker system.

garrettdreyfuson [dead]

This is a fantastic idea especially for those in the news industry. Any thoughts on pursuing it?

garrettdreyfuson Show HN: An open-source, Raspberry-Pi-based Siri alternative

finally a use for the filibuster .

garrettdreyfuson I don't want to be a Real Programmer

I think the only solution is to code if it makes you happy.

garrettdreyfuson Pullup, the site you join via pull request

You can join any satellite by pulling hard enough.

garrettdreyfuson Learn C, Then Learn Computer Science

I learned to program in python, and later in front end web development languages such as js, css, and html. I have recently started to learn about operating systems, with the eventual goal to contribute to the Linux kernel. Before now I had never touched C. I ran into very similar problems. My first C program forked a child, its child initiated a shared memory object, wrote a collatz sequence to it and exited. Then the parent read and printed from the memory object. It took over 2 hours because C was so alien to me.