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Tristan at 16:00 PM on 30 March 2015Scientists link Arctic warming to intense summer heatwaves in the northern hemisphere
Whoops, meant earth system, not biosphere.
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Tristan at 15:59 PM on 30 March 2015Scientists link Arctic warming to intense summer heatwaves in the northern hemisphere
Watchdog@9
"does the Arctic Sea Ice Itself in-turn Affect the Global Climate more than Global Climate affects the Arctic Sea Ice?"
The extent of sea ice in the arctic summer is one of the amplifying feedbacks in the climate system. When the planet heats, summer sea ice goes down, which reduces the earth's albedo, which causes the planet to heat more.
Changes in Antarctic Ice volume are also indicative of the biosphere's total heat content.
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bozzza at 15:45 PM on 30 March 2015Ipso proves impotent at curbing the Mail's climate misinformation
It's not immoral to have a differnet opinion but it is immoral to lie.
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ryland at 14:57 PM on 30 March 2015Ipso proves impotent at curbing the Mail's climate misinformation
But on the other hand Ipso doesn't do much about pictures showing steam not smoke coming out of power plant stacks in newspaper articles about global warming. Perhaps the body just isn't up to its monitoring role. And labelling as immoral those who have a different opinion, not only smacks a little of use of the term heretic in the middle ages but also is unlikely to get them to change that opinion.
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PhilippeChantreau at 14:34 PM on 30 March 2015Scientists link Arctic warming to intense summer heatwaves in the northern hemisphere
Arctic climate stable over the past 9 years? Really? That time period is long enough to establish stability of climate? News to me.
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Bernard J. at 14:19 PM on 30 March 20152015 SkS Weekly Digest #13
...or D218O...
Or frozen to the bottom of the glass! -
Watchdog at 14:02 PM on 30 March 2015Scientists link Arctic warming to intense summer heatwaves in the northern hemisphere
Moderator - The points of my post(s) are two-fold.
A) Arctic Climate is relatively stable from 2005 to today.. In fact,
2014's Summer ICE graphs as the coolest summer over that time
B) Considering Arctic Sea Ice Volume is only in the vicinity of being less than, for example, 1/10th of 1 percent of Antarctica's Total Ice Volume, it's small variations over the past 10 years reflects the Arctic's regional climate fluctuation.
Said another way, the Climate factors Underlying/Affecting the Extent of Arctic Sea Ice - have not significantly Changed during the Time presented by the Graph I'd posted - and Changes in Antarctic Ice Volume could easily be wondered as being much more indicative of Global Climate - due to its vast disparity in size when compared with Arctic Sea Ice.
Additionally, considering Arctic Sea Ice as being the Effect of the Underlying Cause of Regional Climate, in anyone's opinion here, does the Arctic Sea Ice Itself in-turn Affect the Global Climate more than Global Climate affects the Arctic Sea Ice? -
Magma at 12:40 PM on 30 March 20152015 SkS Weekly Digest #13
I'm not entirely convinced about the ice in the glass on the left... unless it's D2O or H218O.
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Bernard J. at 10:52 AM on 30 March 20152015 SkS Weekly Digest #12
One cannot have a cartoon like the one above and not refer to the excellent mocking of denialism that is the Hy Brazil scene from Erick the Viking.
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John Mason at 07:12 AM on 30 March 2015The UK winter of 2014-15: another Tabloid FAIL
The last day of the Six Nations was a rollercoaster, Bill!
Rao - no further comment required. Phil Eden by contrast is one of the good guys. As with Roger Brugge, I have always respected him. These guys stand 100 miles above the likes of Corbyn and Madden.
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william5331 at 04:57 AM on 30 March 20152015 SkS Weekly News Roundup #11A
Climate change is not a technical problem.. We all know what needs to be done. It is a political problem... PPCT.... who Pays the Piper Calls the Tune. As long as rich vested interests are allowed to buy our politicians, they will tell them what to do.
http://mtkass.blogspot.co.nz/2015/01/ppct.html
Moderator Response:[JH] Please do not use the SkS comment threads to promote your own blog post. Doing so is akin to advertising.
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billthefrog at 03:47 AM on 30 March 2015The UK winter of 2014-15: another Tabloid FAIL
Nice one John,
Coming so soon after Super Saturday's nail biting end to 6N15, I was surprised to see that you had managed to put together such a "rogues gallery". I thought you might still have been too wound up. (As we had already clinched the wooden spoon by then, I could just settle down in front of the goggle-box for 7 hours, with a big "Do not disturb, except with cups of tea and slices of cake" sign on the door.)
I don't know which of those clowns is worst, but Rao is simply just repetitive. If one were to redact the dates, many of his articles from one year to the next would be fully interchangeable.
He may, or may not, still work there, but the Torygraph did used to have a reasonable person doing some of their weather material - namely Philip Eden. I've had a couple of his books out the local library, and one of these - A Change in the Weather - devotes a chapter or two to nonsensical weather headlines. It's worth a quicko dekko, if you haven't seen it already.
cheers bill f
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bozzza at 03:45 AM on 30 March 2015Glaciers are growing
The mass loss from 1996 to 2005 is more than double the mass loss rate in the previous decade of 1986 to 1995 and over four times the mass loss rate over 1976 to 1985.
A regular doubling period is the exact definition for exponentiality... can anyone please tell me when the saviour of sinusoidality kicks in??
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z1robbie at 03:28 AM on 30 March 2015Water vapor is the most powerful greenhouse gas
I am working to understand the complex interactions involved in the most complicated thing there is, climate. Water vapor and clouds seem to be where the most uncertainty lies, according to my understanding of IPCC reports.
Have there been any research papers done on the diurnal temperature changes in desert areas ?
It would seem to me in the near absence of water vapor (low humidity) the difference between day time highs and night time lows over time should correspond to the increase in co2 during the same time period. That is since the Industrial revolution the difference between highs and lows should be decreasing proportional to the increase in co2. They would be inversely proportional.
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Watchdog at 03:07 AM on 30 March 2015Scientists link Arctic warming to intense summer heatwaves in the northern hemisphere
CORRECTION to my above post.
It should read Arctic Sea Ice AREA (in km2) and not VOLUME.
Arctic Sea Ice annual area average is c. 7.5 Million Square Km..
Arctic Sea Ice annual thickness average c. 2.5 Meters. (0.0025 km3)
Arctic Sea Ice Volume averages rounded up -> 20,000 km3
In Contrast Total Antarctic ICE is c. 26,500,000 km3,
which is larger than Arctic Sea Ice by a factor of >1000Moderator Response:[JH] What is your point?
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bozzza at 02:31 AM on 30 March 2015Glaciers are growing
Ok, so what if I were to say the rapid decline(rate of change) after 1990 was also seen at the start of the graph in figure1(Basic). Does the graph in figure1 actually make any statment keeping this in mind?
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Watchdog at 02:08 AM on 30 March 2015Scientists link Arctic warming to intense summer heatwaves in the northern hemisphere
Denmark's Meteorological Institute publishes Arctic Sea Ice Volume from data taken daily by the Greenland Climate Research Centre.
Arctic Sea Ice Volume - Declines in Summer and Rises in Winter.
Graph of the past 10 years includes data from Today (29Mar15)
Sea ice extent in recent years (in million km2) for the northern hemisphere, as a function of date.
http://ocean.dmi.dk/arctic/old_icecover.uk.php
The Danish Meteorological Institute (DMI) was established in 1872. In 2013 DMI employs 350 people. DMI is an institution under the Danish Ministry of Climate, Energy and BuildingModerator Response:[JH] What is the point of your post?
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One Planet Only Forever at 01:47 AM on 30 March 2015The UK winter of 2014-15: another Tabloid FAIL
I just reviewed the data on the SkS Temperature Trend page and, though the maximum values are not identified, it is clear that none of the data sets show the most recent 3 month averages to be the warmest. And not all the data sets have the most recent 6 months as the warmest. In fact, the HADCRUT krig and HADCRUT hybrid data sets only indicate that the averages of about 30 months and longer are governed by the the time period ending in FEB 2015.
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One Planet Only Forever at 01:35 AM on 30 March 2015The UK winter of 2014-15: another Tabloid FAIL
Tony W,
In the NASA GISTEMP data set of the Land-Ocean monthly averages the 3 month period ending in February 2015 was not the warmest 3 month average. The 3 month average ending in April 2010 was the warmest (And early 2010 was also when the warmest 2, 4, and 5 month averages occurred, none of the warmest were in 1998 - the warmest month was in Jan 2007). In that data set it is only the 6 month and longer averages ending in Feb 2015 that are the warmest (every single one of those from the 6 month average through to a 1000 month average).
However, the claim made may be correct for the NOAA Land-Ocean surface temperature data set, or the HadCRUT Land-Ocean set, or the Land only data sets. So the claim about the warmest 3 months simply needs to be provided with clarification of its context.
The most important context for the record setting recent warmth is that it is occurring with less of an El Nino bump than occurred in 2010. And the multi-month averages that occurred during the massive El Nino bump of 1997-98 are significantly cooler than the current multi-month averages of equal duration. IN the GISTEMP L-O data set the warmest 3 month average in 1998 was about 0.70 C. The 3 month averages since the 3 months ending in Oct 2014 have all been warmer. And the March 2015 average only needs to be above 0.56 C to continue that string.
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Bappleby13 at 00:37 AM on 30 March 2015New textbook on climate science and climate denial
I am half way through the text, including the last two chapters on climate denial. Though I have found distracting little errors and duplications, I want to know if this text is yet being used in an accredited university. If not, I am willing to provide financial help to the students of the professor that first uses it.
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TonyW at 17:15 PM on 29 March 2015The UK winter of 2014-15: another Tabloid FAIL
Hah, and globally, I believe I read that it was the warmest 3 months (Dec-Feb) on record.
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citizenschallenge at 13:17 PM on 29 March 2015New measurements confirm extra heating from our carbon dioxide
MarkR,
I'm hoping you can help clarify something for me. Jim Steele makes a novel suggestion regarding Heat Waves. It seems wrong on a number of levels, but I sure can't put it together into words. I'm hoping you can help, here's the quote:
"every heat wave get's trumpeted as global warming, but the heat waves usually occur under very dry conditions. Dry conditions allow the earth and air to heat up much more quickly. And when you get this high pressure settle in, it allows for greater solar insolation, that heats the land more quickly and that high pressure dome stops convection that would carry away that heat, much like rolling up the windows in your car, watching your car heat up.
And because water vapor makes up 80% of the greenhouse gases or even more, the heat waves are actually happening when there's a drop in the concentration of greenhouse gases."
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jja at 07:00 AM on 29 March 2015New measurements confirm extra heating from our carbon dioxide
MarkR @20 Allen et. al. 2014 is included in the graphic. The error bars make it practically worthless compared to hansen and sato 2010, though it does give a higher mean value as shown on the graphic above.
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John Mason at 03:58 AM on 29 March 2015The UK winter of 2014-15: another Tabloid FAIL
Another problem that someone on Facebook pointed out to me is the Boy that cried Wolf syndrome. One of these days there could well be a severe low-level blizzard of 1947 magnitude affecting a large swathe of the UK and some people, having read these Tabloid stories over so many years, will misguidedly elect to ignore the deadly serious UKMO warnings, to their great risk. A 50cm fall of level snow with a force 9 gale behind it, while statistically very rare, could quite feasibly happen one winter and it could cause an awful lot of casualties if the public ignore what the best of the science says.
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One Planet Only Forever at 00:53 AM on 29 March 2015The UK winter of 2014-15: another Tabloid FAIL
The sensationalized regional forecasts of what could happen more than a few days into the future are indeed a problem. They lead some people to believe that the difficulty in predicting such things must mean there is no way anyone can reliably model the future global climate.
This potential to develop misunderstanding, or mistrust, of the ability to model forecasts of global climate may be the motive behind some of the Tabloid nonsense, especially by Tabloids owned by deliberate disbelievers of climate science like Murdoch.
Another consequence of the poorly substantiated sensationalized 'predictions' is the association of those 'failed' predictions with other important climate forecasting that has the potential to be correct and require preventative measures to be implemented 'just in case'. A good example was the recent potential massive Blizzard event predicted for New York city. The storm track was further east than it might have been and as a result Boston and other locations got walloped in the way that New York might have been. The fact that New York was spared was seen by many to be proof of unnecessary sensationalizing of what might have happened. That attitude in a population is what leads to tragedies like Katrina where many people were left at risk in a city that was at serious risk because of a lack of interest in making the changes and improvements identified the last time a big hurricane hit the region because "it might not really be all that bad again soon". In advance of Katrina the residents of New Orleans understood that the freeway system not being elevated all the way through the city was a major concern, and indeed they were correct. And the city did not have any plans to move the poor who had no where to go and no way to get there.
Not all of these sensationalized predictions will be failures. And New Orleans would have suffered worse if the eye of Katrina and tracked west of the track it actually followed, just as New York was fortunate the Blizzard storm track was not further west than it ended up.
It is important to differentiate between the reliability of near term regional forecasts, especially the potential variability of storm tracks as little as one day in advance, from the more absured claims made about the regional expected weather more than one week into the future. And whenever that clarification of understanding is presented the completely different reliablity of global climate forecasting of general conditions averaged over many years should be mentioned. More people need to understand that the average contitions in the future can be very reliably forecast, in spite of the variability of the accuracy of near term regional forecasts.
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Joe Wiseman at 23:43 PM on 28 March 2015Ipso proves impotent at curbing the Mail's climate misinformation
A Major US church has labelled climate deniers as immoral. Dr. Martha Stout in The Sociopath Next Door claims 4% of people are sociopaths. Mr. Rose may be both.
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MarkJBohrer at 23:37 PM on 28 March 2015Ipso proves impotent at curbing the Mail's climate misinformation
I couldn't find information on the IPSO website, but I can only assume that it is funded by the news industry, with membership from that industry. I wouldn't count on IPSO doing anything.
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BojanD at 23:32 PM on 28 March 2015Ipso proves impotent at curbing the Mail's climate misinformation
Well, I've just send IPSO an email and tell them what I think, politely, of course. I think this kind of legitimate pressure is vastly underestimated.
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uncletimrob at 19:26 PM on 28 March 2015The UK winter of 2014-15: another Tabloid FAIL
The first thing we need to ask about tabloid articicles is " is this a Murdoch rag?" If the answer is "yes" then we can discount any opinion or editorial therein. If the answer is "no" then there may well be some intelligent, considered and even perhaps scientificically based opinion. Murdoch has alligned himself with the far right, science denying, "greed is good", "develop at all costs" bunch, so we cannot hope to have rational or considered opinon or commentary from his publications. There are probably other ratbag media owners that I'm not aware of as a resident of OZ, where his influence is known as the murdocracy.
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uncletimrob at 19:14 PM on 28 March 2015Ipso proves impotent at curbing the Mail's climate misinformation
As an outsider it seems to me that IPSO is at best useless and worst incompetent.
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juggared at 16:57 PM on 28 March 2015Climate change in the Arctic is messing with our weather
Arctic sea ice hit its annual peak early this year, and climate scientists say the region's below-average ice conditions made this year's maximum extent the lowest on record.
Every year, Arctic sea ice — ice that forms and floats in Arctic waters — grows during the winter and typically reaches its peak in March. A new report from the National Snow & Ice Data Center (NSIDC), however, reveals this year's Arctic sea ice likely reached its maximum extent earlier than expected, on Feb. 25. At this peak, sea ice covered 5.61 million square miles (14.54 million square kilometers) — the lowest maximum extent since satellite record keeping began in 1979.
The authors of the NSIDC report also found below-average ice conditions everywhere except in two regions of the North Atlantic Ocean: the Labrador Sea and the Davis Strait. [Images of Melt: Earth's Vanishing Ice]
Researchers have seen fluctuations in the date of the sea ice's peak, with it occurring as early as Feb. 24 in 1996 and as late as April 2 in 2010. Still, this year's maximum extent occurred 15 days earlier than the March 12 average calculated from 1981 to 2010.
The Arctic ice cap grows and shrinks with the seasons, and changes in the region's ice cover are largely dictated by variations in sunlight, temperature and weather conditions.
This year's maximum extent was 425,000 square miles (1.10 million square km) below the average from 1981 to 2010 of 6.04 million miles (15.64 million square km). This year's ice cover was also 50,200 square miles (130,000 square km) lower than the previous record low set in 2011.
Ice growth this winter lagged behind last year's progress, partly due to unusual patterns in the jet stream in February that created warm pockets over the Bering Sea and the Sea of Okhotsk, in the western Pacific Ocean, according to the NSIDC.
Yet, officials say a late-season boost in ice growth may still be possible.
"Over the next two to three weeks, periods of increase are still possible," NSIDC scientists wrote in the report. "However, it now appears unlikely that there could be sufficient growth to surpass the extent reached on February 25."
The NSIDC is expected to release a full analysis of this winter's sea-ice conditions in early April.
Moderator Response:[DB] Please do not plagiarize the works of another and represent it as your own creation. Subsequent such infractions will be summarily deleted and could result in a suspension of your commenting privileges here.
Plagiarized text stricken.
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DSL at 12:26 PM on 28 March 2015Climate's changed before
ZMathblasterZ, the first and foremost thing to keep in mind is that CO2 absorbs/emits at various pressure-broadened bands within the thermal infrared range, the range within which the sun-warmed Earth emits. The emission is in random direction, effectively half up half down. The process lengthens--in space and time--the path of energy from surface to space.
Downwelling thermal radiation has been directly measured from the surface.
So an increase in CO2 is going to result in an increase in energy storage, regardless of the situation. Beyond that, though, there are interesting questions about the timing of the CO2 amplification effect in the process of the Pleistocene glacial cycles. -
ZMathblasterZ at 08:46 AM on 28 March 2015Climate's changed before
Wondering if there are better studies on the idea that CO2 preceded a temperature rise. Ex. More than one warming event.
Looking at that abstract are there any studies that support the idea of cause? There is a lot of correlation here but no causality.
Also is there any additional data on the role on methane in the past events and its involvment in warming and extinction related activity?
Moderator Response:[TD] In all of the following Skeptical Science posts, after you read the Basic tabbed pane, read the Intermediate and then Advanced if they exist:
- "CO2 Lags Temperature"
- "Warming Causes CO2 Rise"
- "Greenhouse Effect Has Been Falsified"
- "CO2 Only Causes 35% of Global Warming"
- "It's Not Us"
- "There's No Correlation Between CO2 and Temperature"
- "2nd Law of Thermodynamics Contradicts Greenhouse Theory"
- Climatologist Richard Alley's AGU conference lecture "The Biggest Control Knob: Carbon Dioxide in Earth's Climate History"
And "It's Methane."
The Search field at the top left of every page is useful.
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MarkR at 06:45 AM on 28 March 2015New measurements confirm extra heating from our carbon dioxide
jja @17:
Is this the sort of thing you've been looking for? We now have estimates of the TOA imbalance in each decade.
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RedBaron at 06:06 AM on 28 March 2015There's no empirical evidence
@MA Rodger,
Sorry for the delay in replies. I realise I have probably poorly stated my argument. So I found a presentation explaining it online. I realise the presentation is not the same weight as a scientific study or even a synthesis. But I hope this will explain my position with more clarity. Please explain to me where you believe this guy is wrong. That will give you context and me a place to start digging.
https://www.youtube.com/watch?v=8Q1VnwcpW7E
PS. You said, "That in itself would be a wonderful thing to achieve if it were possible but it would require a change in agricultural practices worldwide to get such a result, a task almost as difficult as weaning mankind off the fossil fuels which is the primary cause of our problem." I would counter with the fact the green revolution happened almost overnight. A similar change to a carbon farming revolution could be equally rapid in my opinion.
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MarkR at 05:37 AM on 28 March 2015New measurements confirm extra heating from our carbon dioxide
Theo @5:
Quick answer is: they did compare measurements to theory and found the model did excellently, see Figure 1 in the paper.Your equation is an approximation from Myhre et al. (1998). It's for net change in flux at the tropopause after allowing the stratosphere to adjust, and averaged over 3 different atmospheres (tropical, northern and southern).
This experiment has measurements from two land surface locations, both Northern Hemisphere, only clear-sky and including changes in temperature and water vapour.
Since CO2 and water vapour have some absorption band overlap, then they each steal some heating from the other. So if you increase CO2 without increasing water vapour (like in Myhre et al) then the calculated CO2 effect should be bigger than the case where water vapour increases (like in this experiment). That's just one reason why we should be careful with the comparison.
Both Myhre et al. and this study use line-by-line models that are astonishingly accurate (e.g. Tjemkes et al., 2003). These new measurements gives us even more confidence that these models can be used to estimate radiative forcing.
We'd already checked these models "in the wild", and satellite measurements also back up expected changes (e.g. Harries et al., 2001). This new study seems to be built on a top quality experiment, but we already had enough experimental evidence to be very confident in the radiative transfer models used to calculate radiative forcing.
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plashing at 04:21 AM on 28 March 2015The UK winter of 2014-15: another Tabloid FAIL
well written I couldn't agree more these forecasters want stopping all it's doing is frightening old people with these horror stories.I used to get it when my mother was alive she used to take the Express and would always take notice of what was written about the weather and she would be worring if the cares would be able to get,or I would get to do the shopping.What about all the businesses who have taken notice and over stocked with winter clothing,snow moving equipment which the can't sell because it's been so mild. Here in Lincolnshire we have had very little snow you woudn't be able to build a snowman or have a snow ball fight,didn't even have to clear the driveway.The Express and Madden should write an apology to all the old people and businesses that have been taken for a ride.what about the Easter headlines saying it is going to be cold and wet when 2 weeks ago they were printing headlines it was going to be the hottest Easter on record,its not good for the businesses on the coast with these reports. Kind Regards P. Hewitt
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bozzza at 01:09 AM on 28 March 2015Climate sensitivity is low
@316, you mean I've got more reading to do?
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bozzza at 23:34 PM on 27 March 2015It's not bad
As an example: if a man on upon hearing about this climate thingy were to question if a 4 metre sea level rise were already locked in by 2300, what sort of answer would he receive?
I'm not being flippant, I'm directly asking if he would only receive waffle or would he be able to get a direct answer?
This is what I mean by the communication breakdown arising from the fact sea-levels are not being communicated and thus engaged with. (Yes- I do have method!!)
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bozzza at 22:58 PM on 27 March 2015It's not bad
...and 'that' is bad!!
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bozzza at 22:57 PM on 27 March 2015It's not bad
I hope I am not posting in the wrong thread, but: instead of aiming for a less than 2 degree rise in temperature shouldn't we be talking in terms of sea level rise?
For instance I live on a hill and 5 metres isn't going to get to where I live but it will decimate the city and every supporting resource for the best part of 100 square kilometres, minimum!
The answer could be quickly retorted that we don't know what kind of temperature that equates to and seeing as 2 degrees is a nice round figure that a population of billions can understand we'll go with that...
Thus, the problem can now be seen as an inability to communicate at the most basic level making this a very bad problem indeed! Further, I am saying that the inability to respond to this basic communication problem will lead to panic when the problem becomes understood by the masses yet the lack of communication skills to be able to indicate that it has been appreciated and understood becomes the more pressing issue.
.. I'm saying the important issue of the clear and present danger involved, i.e. a numerical value for sea level rise, is missing from the conversation!
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Tom Curtis at 18:30 PM on 27 March 2015It hasn't warmed since 1998
Tristan @302, it is not just the industry (or not just the industry). Engineers (and doctors) are disproportionatly represented among creationists as well. I think what happens is that the engineers are aware that they have a good technical education in areas that are closely related to science. However, they are taught those skills as a recieved body of knowledge, so that they do not train themselves to not decieve themselves when it comes to science. That leaves some engineers (and by no means all, or even most) prone to assume they can speak authoritatively on a subject that they do not understand.
Nor should it be believed that this is a disease that only afflicts engineers, although the etiology is no doubt different for physicists:
Finally, I agree with Glenn Tamblyn - engineers not afflicted with this peculiar arrogance do have the skills to understand climate science quickly and well. They just have to be prepared to learn first.
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Tristan at 17:36 PM on 27 March 2015It hasn't warmed since 1998
I would imagine that the apparent increased incidence rate of denialism among engineers and geologists has less to do with the curriculum or knowledge base of those disciplines and more to do with the industry they often find themselves working within.
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John Mason at 16:50 PM on 27 March 2015The UK winter of 2014-15: another Tabloid FAIL
Friends have pointed out that while I was writing this post, the nonsense continued apace:
"Britain set for HOTTEST Easter EVER as temperatures to rocket to 80F in holiday heatwave" Express, 16th March 2015.
"Easter weather forecast: TEN inches of snow, gales and plummeting temps - happy Easter" Express, 26th March 2015.
And so it continues! -
Glenn Tamblyn at 16:47 PM on 27 March 2015It hasn't warmed since 1998
Speaking as someone who did qualify as a Mechanical Engineer, I suppose I should step in to defend my profession. Mechanical Engineers, perhaps more than any other branch of engineering are actually uniquely qualified to evaluate climate science. So long as they are prepared to go back to their roots; to the core subjects they studied.
Mech Engies don't just deal with gear trains and machinery. At it's core is a lot of study of thermodynamics, fluid mechanics, physics, maths etc. Other branches of engineering have a different balance. Electrical engineers don't do much fluid mechanics, Civil engineers don't do as much thermodynamics, etc.
The problem for Mechanical engineers is that we tend to get channelled into dealing with machinery in our working lives and put the underlying core science we learn't on the back burner. If a Mech eng' can go back to their original training they have all the tools needed to assimilate climate science. As examples:
- Heat Transfer - the Earth's Radiative Balance for example
- Viscosity - how the wind imparts a shear force on the oceans and in turn shear forces within the oceans generate Ekman Transport.
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bozzza at 14:20 PM on 27 March 2015It hasn't warmed since 1998
It saddens me to agree with one of the specific comments regarding engineers as having a poor grasp of science. I failed Mechanical engineering and basically can't have a considered opinion by default but do know this: Mechanical engineers are the most variedly paid engineers, presumably meaning some barely passed and possibly took decades to finish just for the status involved with such a title.
I have talked to retired engineers who simply don't accept CO2 as being mechanically forced into the closed system called our atmostphere even though that is exactly what they were involved with doing all those years: truly weird, I must admit, but seemingly not an uncommon phenomenon.
The well paid would never talk like this, would they?
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bozzza at 13:11 PM on 27 March 2015It hasn't warmed since 1998
Albert H, you forget the possiblity of the ice sucking up the added heat content: it is my considered (lol, check me out: failed engineering student!!) opinion that the energy is going toward phase-change-mode.
Politically the IPCC reports are by default conservative as all Governments involved have to agree as to what goes into them thus giving rise to my slightly panicked thoughts on this matter.
The idea of 'diminishing returns' can be easily interpreted by the masses as wasted effort and the double-handling of matters tires us all. The need to Nip this problem of correlation with gap between rich and poor means climate denialism is over and the disinvestment campaign by the aroused consuming voter wins. What else is economics but a reason to get out of bed and do what needs to be done as the problem presents itself?
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Rob Honeycutt at 09:17 AM on 27 March 2015It hasn't warmed since 1998
Albert H... That might seem like a logical assumption, but with all due respect to your engineering experience, the assumption would be wrong. There's far more that you should endeavor to learn about ocean-atmosphere coupling before coming to any conclusions. Here is a good place to start: LINK
There are also many great informative articles here on SkS that you should take the time to read through. Nearly all of the articles here are fully cited with the relative current research which, if you have further questions, you should locate and read through.
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Tom Curtis at 09:15 AM on 27 March 2015It hasn't warmed since 1998
Albert H, for the following I have used the Berkely Earth Surface Temperature (BEST) as I consider it the best currently available surface temperature index. That is because it is constructed using (by far) more temperature records in determining the series than any other temperature index, and also constructed with a less controversial method than any other temperature index.
Using the SkS trend calculator, I find the trends are as follows:
1977-1997: 0.11 C per decade
1999-2014: 0.121 C per decade
I notice that the 1999 onward trend is slightly greater than the 1977-1997 trend.
Of course, if I use 1998 for a terminal and initial year respectively, if find trends of 0.126 C per decade (1977-1998) and 0.09 C per decade (1998-2014).
I will note first that that is not so large a difference as to justify your conclusion. Your conclusion, therefore, is based on using an alternative, unspecified, and objectively inferior temperature index.
More importantly, your conclusion is shown to follow primarilly from using 1998 as your bridge year. 1998, however, is an unusual year in that it was the year of the strongest or second strongest El Nino event on record. (Its only rival occured at the same time as a major volcanic erruption, with the effects of the two events on temperature essentially cancelling each other out.) 1998's unusual warmth, on which your claim relies, is therefore a consequence of short term internal variability, not radiative forcing.
Finally, the trend over the whole period was 0.164 C per decade, within error of model predictions.
So much for the technical discussion. I notice as an aside you claim to be an engineer with 40 years experience. As such you would clearly know certain basic principles of data usage:
1) You would know to use trends rather than end points in analysing rates to avoid "endpoint effects";
2) You would know to use clearly identified sources of data;
3) You would know to use the best available data, or at least to justify your choice when you do not; and
4) You would know not to cherry pick end points for data analysis.
You have clearly violated each of these principles. I am therefore forced to conclude that your claim to tenuous authority (engineers often have very bad understanding of science, together with an over inflated belief in their understanding of science) is false; or that you have deliberately violated good practise to strengthen a very weak argument. Which is it?
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DSL at 08:48 AM on 27 March 2015It hasn't warmed since 1998
Albert, where are you getting your OHC figures?
See http://www.nodc.noaa.gov/OC5/3M_HEAT_CONTENT/heat_content2000m.png
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