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Topics - Bernard

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I thought I had already asked, but can't find the subject now. Maybe I only intended to do it?
This is an international scientific forum, which makes two sufficient reasons to forbid local units such as miles, gallons, Fahrenheit etc.
Is it possible to use only units from the International System of Units in all posts in this Forum?

Note that SI will go through a major revision on 20 May 2019  :)
https://www.bipm.org/en/CGPM/db/26/1/

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Science / Underground temperatures trends
« on: January 17, 2019, 12:20:44 AM »
I just posted this, a bit off-topic, on another thread about permafrost warming.
https://forum.arctic-sea-ice.net/index.php/topic,2546.msg186586.html#msg186586
But thought it was worth a topic by itself.

The global warming could also be measured anywhere in underground, whether this underground is frozen or not. At depths around 20m, the temperature is mostly stable year-round, and is close to the mean ground temperature. It's a bit of work to borehole at such depths, but not that much, and there are quite a lot of caves worldwide where the temperature could be measured.
Given the stability of underground temperatures year-round, to have interesting series it would not even be necessary to measure it on a daily basis.

Anyone knows science papers on such topics?

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Developers Corner / Relevancy of Machine Learning to climatic models
« on: December 12, 2016, 04:48:04 PM »
Re-starting a conversation which forked off-topic on the 2016/2017 freezing season thread
https://forum.arctic-sea-ice.net/index.php/topic,1611.msg96388/topicseen.html#msg96388

Let me sum up the question and elements of answers so-far.

Machine Learning has provided spectacular advances some call a paradigm shift in domains as various as image and speech recognition, automatic translation and help to decision to quote a few. Ongoing research is trying to apply Machine Learning approaches to weather forecast and climate models, see e.g., http://www.climateinformatics.org/?q=node/84

Arguments mostly against this approach so far (NeilT, Archimid, epiphyte)

- Not enough quality data to feed the learning, hence Garbage In, Garbage Out most likely.
- We are entering uncharted territories, data we have are irrelevant. The machine would learn about the past only.
- Inscrutability of Machine Learning algorithms, making them difficult to be adopted as scientific method.

The latter point is certainly the most fascinating one. Enthusiastic transhumanists are ready to bleep over that one and trust inscrutable algorithms provided they are efficient. Majority of scientists certainly less so, because science is about understanding how it works, not only making "correct" decisions.

I wrote a small post a while ago which can be relevant although not specific to climate science.

https://bvatant.blogspot.fr/2016/10/i-trust-you-because-i-dont-know-why.html


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Hello all

I'm a daily reader of this forum, mainly lurker. But given the international and scientific level of the debates, is it too much to recommend the use of standard international units, like kilometers instead of miles, Celsius instead of Fahrenheit etc etc. Or make it explicit that is a US dominated forum, and everyone else on Earth is supposed to know what is a mile, a foot an inch, a pound and other oddities.

"In 1927 several million people in the United States sent over 100,000 petitions backed by the Metric Association and The General Federation of Women's Clubs urging Congress to adopt the metric system. The petition was opposed by the manufacturing industry, citing the cost of the conversion." https://en.wikipedia.org/wiki/Metric_system#International_adoption

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Greenland and Arctic Circle / Greenland glaciers in Geonames
« on: June 12, 2014, 07:56:01 PM »
Hello all

I'm often at lost figuring where places which are spoken about here can be. My reference for toponyms in general is http://geonames.org but data quality and coverage for Greenland is suboptimal to say the least. Using the geonames web services I've extracted easily all the features of type "Glacier" in Greenland, with their permanent geonames URI, names and coordinates. The result is shared here http://bit.ly/1oTjRO9. 391 entries, with a lot of duplicates and certainly inaccurate coordinates for many of them. More comments can be added, the document is open in edit mode.
Geonames being a collaborative and open data project, we can certainly here by a collective effort come out with better data to feed back Geonames.
If people are interested in this effort there are two ways to do it :
- Work on the shared documents and push the results to Geonames.
- Work directly on the geonames wiki to move things at their right place, correct names, delete duplicates, add links to Wikipedia articles ...
I've started with Greenland glaciers but of course this effort can be extended if there is interest to other feature types around the Arctic.

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