chubbs

Recent summer warming in the Yukon exceeds the Holocene climatic maximum despite reduced summer insolation vs early Holocene. https://t.co/gCPWogUB5N

Top 100m of ocean. Tends to go up in steps, with this decades step unusually large.

IPO phase could bring September ice-free date forward. https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018GL081393

Antarctic sea ice has large natural variability. Here are a couple of speculations: 1) I don't recall the details but one paper flagged the the large nino in 2015/16. For sea ice the timing does line-up, 2) The antarctic ozone hole is slowly recovering this would tend to weaken winds and produce warming, both of which will reduce sea ice extent 3) Antarctica warming lags because of the deep ocean nearby which is slow to warm. as time proceeds though Antarctica will catch-up. Per the chart below, the south pole has also warmed in the past decade in a way that doesn't match enso, so it is likely more than just enso.

Rapidly receding Arctic Canada glaciers revealing landscapes continuously ice-covered for more than 40,000 years Here we show that pre-Holocene radiocarbon dates on plants collected at the margins of 30 ice caps in Arctic Canada suggest those locations were continuously ice covered for > 40 kyr, but are now ice-free. We use in situ 14C inventories in rocks from nine locations to explore the possibility of brief exposure during the warm early Holocene. Modeling the evolution of in situ 14C confirms that Holocene exposure is unlikely at all but one of the sites. Viewed in the context of temperature records from Greenland ice cores, our results suggest that summer warmth of the past century exceeds now any century in ~115,000 years. https://www.nature.com/articles/s41467-019-08307-w

With government shutdown, only Berkeley Earth is available for 2018. Clear where we are headed. More details on 2018 at link below. http://berkeleyearth.org/2018-temperatures/

UK met 2019 forecast. https://www.metoffice.gov.uk/news/releases/2018/2019-global-temperature-forecast

November Antarctic sea ice. Blutarsky.

Nino lifting global SST. Bottomed out well above the 2011/12 nina levels.

Not the whole story, but the other man-made and natural factors tend to cancel out.

Below is the best discussion of the available data for the past 1500 years. The current warming is unprecedented. Year-to-year variation in sea ice is expected. We get the sea ice is recovering story periodically in this forum: 2008/9, 2013/14, etc. Sea ice is not crashing and its not recovering, just a steady long-term decline with large year-to-year variability. https://www.nature.com/articles/nature10581

Below is the daily sea ice anomaly and a one-year running average. Autumn, winter and spring have been leading the way down recently.

Go back an re-read what I posted earlier. 1) Sea ice is lower now than anytime in past 2000 years. Sure sea ice was lower in the early Holocene >5000 years ago. Summer sun in the northern hemisphere was stronger then. Summer sun is much weaker now; but, sea ice is decreasing rapidly. Why? CO2 of course, different type of forcing same result. All consistent with consensus science. 2) Per your chart, sea ice in the northern Barents Sea has been stable throughout most of the Holocene. Satellite data shows sea ice is crashing now. Why the difference? The recent crash doesn't appear on your chart; because, the method, used to study past climates, doesn't have the time resolution to pick-up the crash. Nothing wrong with the chart; just bad and misleading analysis by Electroverse.

Why? Whats the point? You ignored the material I posted. Scientific studies are not going to change your viewpoint. All I get from the interaction are insults.

yawn.....too much time spent on denier websites

No your charts don't show that at all. First of all your article is advocacy, designed to mislead and not inform. Second not one of your charts show sea ice extent across the arctic or antarctic. Instead they are proxy measurements at a single site, which are designed to study historic climate not the present. I checked one of them, the Barents Sea proxy from Koseoglu. The measurements of marker compounds in a sediment core have a resolution of roughly once every 200 years, and the most recent measurement is deemed representative of the 1980-2010 average, so the data can not be used to compare current conditions, with reduced ice, to those in the past. Another paper states that the site experienced seasonal ice throughout the Holocene. Near the winter ice edge early in the early Holocene but with trend to more sustained ice coverage during the Holocene that has been partially reversed in the past 150 years. During the 1980-2010 period, typically the site was only ice free in August and September, but currently the site and the entire Barents Sea is still ice free. The ice edge in Spring/Winter has retreated close to the site in recent years, so conditions currently may be approaching those of the early Holocene. In any case your bolded statement is false for this one site.

Here is your bolded text " there is more extensive Arctic and Antarctic sea ice during recent decades than there has been for nearly all of the last 10,000 years. ". The chart I posted shows that sea ice is lower than any time in the past 2000 years. So your bolded text is clearly incorrect. You are talking about the early Holocene 10,000 years ago when the summer sun was much stronger in the northern hemisphere. Yes, sea ice was also low then when the sun was stronger, but I don't find it comforting given our current rapid downward trend. I

Nice try. Sea ice below is a 5-year mean.

You claimed the article was correct. Here is the headline "Arctic and Antarctic Sea Ice Now at Historic High Levels" Obviously the main objective of the article is to mislead.

OK

Here is the latest on antarctic sea ice and on ice sheet mass. I don't see much change in antarctic sea ice. More importantly Antarctic ice sheet losses are accelerating and now contribute significantly to sea level rise. https://www.nature.com/articles/s41586-018-0179-y

No that article is not correct. Its full of inaccurate and misleading statements. The article chart conveniently doesn't include the past 4 years with low sea ice - see chart below. There is no long-term trend in sea ice around Antarctica. Climate models predict very slow warming near Antarctica due to the time needed to heat up the deep oceans there. So the sea ice behavior there is not surprising. Of bigger concern is the ice sheet disintegration that is starting in Antarctica, due to ocean warming at depth, but you won't read about that at "electroverse".

June was cool in the arctic, NE Canada and Greenland but warm in Antarctica and Siberia. 3rd warmest June, 0.01 beyond #1 2016

A couple of comments: 1) One year in the arctic or antarctic is not very important. 2) GRACE data in graph is through 2017. See post above for papers on Greenland mass balance. 3) Regarding arctic sea ice, this year so far looks unremarkable to me. Its not a big melt year like 2012, but its not far from the long-term trendline on most metrics either. (see chart below) 4) There hasn't been any long-term trend in Antarctic sea ice so smack dab on the median is as expected. Ice shelves and ice sheets are the big concern in Antarctica, not sea ice.