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Topics - Archimid

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Consequences / Floods
« on: April 13, 2017, 05:44:09 PM »
I did a search and couldn't find a floods topic in the consequences section. If there is one, my apologies.

That said:

How can Peru prepare to withstand more devastating floods and landslides?

https://www.theguardian.com/global-development-professionals-network/2017/apr/13/peru-prevent-floods-landslides-climate-change

Extract:
More than 100 people have died, nearly 158,000 are displaced and 210,000 homes are damaged, according to Peru’s emergency operations centre. The country’s infrastructure took a big hit: 260 bridges collapsed and nearly 3,000km of roads are unusable, cutting off hundreds of villages and towns.

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A user posted this paper over the Melting Season thread. I want to say something about it but I don't want to derail the melting season this paper discussed. This is the discussion so far:

Does anyone have any comments on the paper that came out on Monday in Nature Climate Change, "Influence of high-latitude atmospheric circulation changes on summertime Arctic sea ice". http://www.nature.com/nclimate/journal/vaop/ncurrent/abs/nclimate3241.html

The authors propose that a substantial amount of the recently observed summer decline in Arctic Sea Ice has been driven by natural variation in atmospheric circulation. "The Arctic has seen rapid sea-ice decline in the past three decades, whilst warming at about twice the global average rate. Yet the relationship between Arctic warming and sea-ice loss is not well understood. Here, we present evidence that trends in summertime atmospheric circulation may have contributed as much as 60% to the September sea-ice extent decline since 1979. A tendency towards a stronger anticyclonic circulation over Greenland and the Arctic Ocean with a barotropic structure in the troposphere increased the downwelling longwave radiation above the ice by warming and moistening the lower troposphere. Model experiments, with reanalysis data constraining atmospheric circulation, replicate the observed thermodynamic response and indicate that the near-surface changes are dominated by circulation changes rather than feedbacks from the changing sea-ice cover. Internal variability dominates the Arctic summer circulation trend and may be responsible for about 30–50% of the overall decline in September sea ice since 1979."


Does anyone have any comments on the paper that came out on Monday in Nature Climate Change


I have a whole article on the topic, albeit with the emphasis thus far on the reporting of the paper rather than the substance of it:

http://GreatWhiteCon.info/2017/03/is-arctic-ice-loss-driven-by-natural-swings/

All this excitement in the Twittosphere and elsewhere leads one to wonder whether Ding, Schweiger et al. saw (or should have seen?) all this coming, and if so what might have been done differently? In any event this story is set to run and run and run and……



Went to look, and sure enough, this is a featured paper at WUWT where it's being sold as confirming natural cycles are responsible, not anthropogenic causes.

Expect to get repeatedly battered by deniers with this paper.  They've been given their marching orders.

See up thread for comments.   

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Consequences / The impacts of sea level rise around the world
« on: March 15, 2017, 03:36:21 PM »
This is a thread to post links to real world examples of the impacts of sea level rise. Sea level rise is no longer a future threat. It is a clear and present danger.

I'll start with this:

USA – Louisiana Wetlands Struggling With Sea-Level Rise 4 Times the Global Average

http://floodlist.com/america/usa/louisiana-wetlands-sea-level-rise

Extract:
The study by researchers in Tulane’s Department of Earth and Environmental Sciences and published in the open-access journal Nature Communications shows that the rate of sea-level rise in the region over the past six to 10 years amounts to half an inch per year on average.

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Consequences / Effects of Climate Change on the biosphere
« on: November 22, 2016, 06:39:20 PM »
I started a thread to document the changes across the biosphere.



Climate change affecting all life on Earth

http://earthsky.org/earth/climate-change-impact-genes-life-on-earth-species


Abstract:
In more scientific parlance, we found in a paper published in Science that genes, species and ecosystems now show clear signs of impact. These responses to climate change include species’ genome (genetics), their shapes, colors and sizes (morphology), their abundance, where they live and how they interact with each other (distribution). The influence of climate change can now be detected on the smallest, most cryptic processes all the way up to entire communities and ecosystems.


The published paper: http://science.sciencemag.org/content/354/6313/aaf7671

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Arctic sea ice / Poll: What happens after the first sea ice free arctic?
« on: September 14, 2016, 04:05:53 PM »
I open this poll with the hope of finding out what this forum thinks about the significance of the first Arctic without sea ice.

Some definitions for clarity:

Arctic changes: That includes the Arctic ocean and the atmosphere above the arctic and any/all parameters that can be given to them. Temperature, pressure, speed, wind and ocean patterns etc.

Earth Systems: That includes the world's oceans,continents and atmosphere and any/all the parameters that can be given to them.

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