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macwithoutfries at 21:04 PM on 14 July 2010Could CFCs be causing global warming?
What I find very relevant and not discussed enough is the actual mechanism by which CFCs would need to act - the denier problem being that the atmospheric concentration of CFCs is 1000000 (one MILLION) times smaller than those of CO2. -
Berényi Péter at 20:49 PM on 14 July 2010Hotties vs Frosties?
#172 scaddenp at 09:32 AM on 14 July, 2010 nuclear has waste issue Not really. Old technology apparently has it, because a lot of long halflife isotopes are left in spent fuel. However, advanced breeder technology with onsite closed system reprocessing can burn out all of it. In fact the huge reserve of present day nuclear waste can also serve as fuel, so not even mining is necessary for several decades. What is left behind is a mix of light short halflife radionuclides (a few thousand tonnes annually), which decay into stable isotopes in several hundred years. Therefore no long term (hundreds of thousand years) safe storage is needed. You can compare it to dangerous chemicals (like heavy metals) in some industrial waste that remain toxic practically forever, still, we tolerate them in quantity. Built in structural safety has also improved a lot. With modern designs neither explosion nor meltdown can possibly occur even in case of a serious system failure. It still costs money to bring such a system back online, but at least no dangerous stuff escapes. Nuclear proliferation issues can also be handled by designing the process in a way let's say 233U gets involved. It decays by emitting hard gamma radiation and it's extremely difficult to filter out (other than burning it along with the rest). As long as something like this is present in the mix, it's unusable for weaponry. BTW, I think this is the primary cause this kind of technology has got much less attention than it would have deserved. Earth as we know it can't last much longer than a billion years for solar radiation is increasing steadily. If we manage to nudge it gradually to ever wider orbits, its lifetime can be extended to five billion years perhaps. Nuclear breeder technology is capable to provide the necessary energy supply on this timescale somewhere around present day prices. Therefore it is a long term solution to the energy problem. In such a long time we may still have other problems though. Including the question of who we are supposed to be after the umpty thousandth transhuman extension, but these questions can wait. I dont see why the land use is such an issue Because land is the only resource which can not be increased by any means, not even with advanced molecular nanotechnology. Terraforming other planets is a rather long term project and there are not many candidates nearby anyway. We could build some surrogate land in space by constructing huge spinning cylinders, filling them up with air, water and soil and trying to inhabit the inner surface, but no matter how hard we try, it's still a far cry from the real thing. Security issues aside, it would always be a Disneyland with "oceans" several meters deep, no hills or skies. Real estate on Earth, even if it is undervalued now, will have a much higher price in the long run. -
sime at 20:16 PM on 14 July 2010Does partial scientific knowledge mean we shouldn't act?
"Hi I'm Doctor Fred, I'm a consultant cancer specialist." "I am sorry to have to tell you that my colleagues and I believe your mother has cancer... however because we can't be sure, and because we can't yet cure cancer, and because the science is not settled, and because it might cause disruption and change your family life style and because it will cost money, we have decided to do nothing for say oh... thirty years until we are really sure we have got the science right..." "What!, but she will die a horrible death, I want a second opinion and I want medical intervention now not in 30 years, you sir are an idiot!" -------------- "Hi I'm Dr Fred I have a PhD in Climate Science." "My Colleagues and I have determined that the planet Earth has the equivalent of climate cancer, however it is still treatable if we act now..." "Na, don't be silly, we can't be sure, and because we can't yet cure climate cancer, and because the science is not settled, and because it might cause disruption and change your family life style and because it will cost money, and because it will upset big business and because we have loads of fossil fuel to sell you suckers yet, we have decided to do nothing for say oh... thirty years until we are really sure we have got the science right, oh and I need a second opinion!..." "What!, we have given you hundreds of independent opinions and data sets and you are ignoring all of them, you sir are an idiot!" Sigh. -
Berényi Péter at 19:01 PM on 14 July 2010Watts Up With That concludes Greenland is not melting without looking at any actual ice mass data
#33 chris at 08:08 AM on 14 July, 2010 you can find it stated rather explicitly in Trenberth's review Yes. But he also says in his review: "A 1 mm eustatic rise in sea level requires melting of 360 Gt of ice that takes 1.2×1022 J. Because the ice is cold, warming of the melted waters to ambient temperatures can account for perhaps another 12.5% of the energy (total 1.35×1020 J)." That must be a misprint. 360 Gt of ice is 3.6×1014 kg. Heat of fusion for (freshwater) ice is 3.3355×105 J/kg. Therefore the energy required to melt that much ice at 0°C and atmospheric pressure is 1.2008×1020 J, which is a hundred times smaller than Trenberth's figure (his total of 1.35×1020 J seems to be correct, at least as an order of magnitude estimate). What do reviewers do? -
Esop at 18:42 PM on 14 July 2010What's in a trend?
#7: By "tweaked", I was referring to the new versions of the UAH data (5.3 etc) that conveniently dropped the anomalies so they would not beat the 1998 data. -
Chemware at 16:33 PM on 14 July 2010Does partial scientific knowledge mean we shouldn't act?
Actually, the parallels to Relativity and the Nazi's attacks on "Jewish Science" are extremely strong. Einstein himself said in 1920: This world is a strange madhouse. Currently, every coachman and every waiter is debating whether relativity theory is correct. Belief in this matter depends on political party affiliation. -
John Brookes at 15:41 PM on 14 July 2010Does partial scientific knowledge mean we shouldn't act?
I think all the Relativity skeptics (who are cruelly and unkindly usually bundled together under the general term "nutter") should get their act together and start insisting that the Global Positioning System stop using Relativity to keep the satellite clocks accurate, because Relativity is "flawed", and Einstein was wrong. Seriously, HumanityRules, I believe we should act prudently and now. If the evidence that there is no need to act improves a bit, then we can reconsider the need to act. Right now, the evidence for inaction is insufficient. -
Peter Hogarth at 15:25 PM on 14 July 2010Sea level rise is exaggerated
daniel at 00:36 AM on 14 July, 2010 "The 1 sigma bounds are irrelevant Peter". This is not science, it is not recognisable statistics either. Irrelevant, or inconvenient? It fits the 1 sigma bounds where it is. It does not elsewhere. -
caerbannog at 15:16 PM on 14 July 2010Does partial scientific knowledge mean we shouldn't act?
If these few papers suggest we don't need to re-organise society should we ignore that? The few papers that I've seen like that would earn a freshman a grade somewhere south of a C- at any respectable university. So, should we ignore the few papers with freshman C-student errors that somehow managed to get through (half asleep) peer-review? Absolutely! -
HumanityRules at 15:04 PM on 14 July 2010Does partial scientific knowledge mean we shouldn't act?
The problem I see here is that you assume all the partial knowledge suggests we should act. In fact within the body of partial knowledge some data says maybe we don't need to act. If these few papers suggest we don't need to re-organise society should we ignore that? -
Rob Painting at 14:58 PM on 14 July 2010Does partial scientific knowledge mean we shouldn't act?
Marcus, you are correct, the graviton is the carrier particle of gravity. All that Star Trek obviously paid off. Pity it doesn't mesh at all with the General Theory of Relativity, which posits that gravity is the curvature in space-time caused by mass/energy within it . Don't tell the skeptics though. -
pmain68 at 14:20 PM on 14 July 2010New observations find underwater Arctic Shelf is perforated and venting methane
Whilst this is not specifically related to the artic ice methane release it is related to methane. Does anyone have any scientific evidence that supports the global catastrophe theory of massive methane release imminent in the Gulf of Mexico due to the BP Deepwater Horizon oil drilling accident. http://www.reuters.com/article/idUSTRE65L6IA20100622 http://www.helium.com/items/1882339-doomsday-how-bp-gulf-disaster-may-have-triggered-a-world-killing-event -
scaddenp at 14:04 PM on 14 July 2010Watts Up With That concludes Greenland is not melting without looking at any actual ice mass data
Bern: IPCC AR4 WG2 would be good place to start, specifically here. -
Marcus at 13:57 PM on 14 July 2010Does partial scientific knowledge mean we shouldn't act?
Hmmm, I always thought that gravity existed as both a particle & a wave-much like light. Though that might just be too many years of Star Trek talking ;)! -
Bern at 13:47 PM on 14 July 2010Watts Up With That concludes Greenland is not melting without looking at any actual ice mass data
CBDunkerson @ #27: I would have thought that such an effect would be very minor - if you consider that oceans already cover ~70% of the Earth's surface, the maximum impact of the increasing area would be around 43% (1/0.7). But that would be the point at which *all* landmass was covered by water. I think, when we're still talking tens of millimetres, that the increased ocean area would be very, very small. A quick search didn't turn up any numbers for inundation areas with various sea level rises, I'm sure the numbers are out there, though. -
Marcus at 13:42 PM on 14 July 2010What's in a trend?
What I don't get is why the Denialists rely so heavily on UAH data. I've read at least one paper that suggests that Spencer hasn't corrected properly for diurnal drift, which slices a good 0.02 degrees per decade off the trend. If you look at the data from RSS, you get a trend of +0.16 degrees per decade for 1979-2010 (June), & a +0.19 degrees per decade trend for 1990-2010 (June). The other thing though, is that none of these results (whether RSS or UAH) can properly account for the role that this decade's deep solar minimum has played on the trends. With Solar Activity picking up again this decade, I think it's fair to say that the trend will probably climb to +0.18/decade (or higher) for a 1979-2019 graph. -
HumanityRules at 12:24 PM on 14 July 2010What's in a trend?
#13 You read the paper? Mail John, he has a copy. These graphes whole hemispheres? Chylek is looking at only high latitudes, poles. -
tomasyn at 12:12 PM on 14 July 2010Abraham reply to Monckton
Thank you, Dr. Abraham, for doing this. You not only thoroughly exposed Monckton, you provided valuable teaching on how to find and evaluate information. It's perfectly absurd that Monckton, with his journalism degree and 0 journal articles, is trashing your credentials as not good enough to understand climate science. Can he not hear himself? -
KR at 09:59 AM on 14 July 2010Hotties vs Frosties?
Berényi - "...all pollutants from burning coal can be filtered out and should be required to be filtered by regulators": That's really rough with radon - it's estimated at 330 mCi/GW, and you really can't filter it. Most of the other radionucleotides (thorium, uranium, etc.) get removed by standard pollution controls. And then you have some really nasty ash... But I do agree with you on several points - nuclear and breeder reactors should receive much more emphasis. Proper breeder reactor approaches should (IMO) include local reprocessing, so almost none of the dangerous stuff ever leaves the site - it gets burned. Coal is a lousy, filthy power source, though, and we should just drop it entirely just on sanity grounds. Subsidies? Renewables receive ~4.9B US$, nukes 1.3B, while coal receives 3.3B, oil/natural gas 2.1B (5.4B total for carbon tech). But renewables ARE developing technology with a lot of promise. I believe (personal opinion, mind you) that the investment can be argued as worthwhile. -
KR at 09:40 AM on 14 July 2010Hotties vs Frosties?
Berényi - Yep, land use is proportional to total energy density. The nice thing about wind farms, however, is that the actual power producing density is ~300-1000 W/m^2 (including access roads), spread over a much larger area to space out the turbines, for a sum density of 3-4 W/m^2. And (!!!) the area between and under the turbines is completely usable for agriculture. Total land removed from use drops right back to 300-1000 W/m^2 levels. Of course, some wind farms (many in my area) are mounted along ridgelines, where effective land use otherwise is essentially nil. They don't subtract any otherwise desirable area. -
scaddenp at 09:32 AM on 14 July 2010Hotties vs Frosties?
BP - wont argue on cleanup wrt to coal - nuclear has waste issue. Hydro v wind is the issue here. But we still farm under windmills. I dont see why the land use is such an issue. I'll also agree with subsidies - apparently $550 billion pa on fossil fuels according to IEA. End that now. Disclosure: my section does research on CO2 sequestration. However, I'd say from research so far is that it remains an open question. Not something you can just fix every coal plant with but a possible solution for some plants. Of course, the added cost will make coal uncompetitive against many renewables in most places. -
Berényi Péter at 09:04 AM on 14 July 2010Hotties vs Frosties?
#168 scaddenp at 07:09 AM on 14 July, 2010 And I'll add another defense for windmills. If you find another way to generate energy, then they are relatively easy to remove unlike say hydro. No, it is not the case. If you have wind farms with the same lifetime energy output as a nuclear plant, decommissioning costs are roughly the same. The big difference is that crap to be collected is spread over a couple of thousand times larger area. For hydro the cost may be more, depending on location, but land use is only poor for flatland hydro power (should also be banned). The real problem is subidies. In the US almost 15 times more public money goes to wind than to nukes ($23.37/MWh vs. $1.59/MWh). Even more to the post-normal craziness of clean coal ($29.81/MWh). Solar also gets its due share ($24.34/MWh). In Europe it is much worse. In a sane world all that money should go to R+D on nuclear breeder technology and none of it to production by whatever means. As for clean coal, carbon dioxide sequestration is plain silly. Otherwise all pollutants from burning coal can be filtered out and should be required to be filtered by regulators. Much better than a carbon tax, its main advantage being it makes sense. -
scaddenp at 08:22 AM on 14 July 2010Hotties vs Frosties?
BP - I thought you would have known where I came from due to recent email corresponse For 2007, the number for NZ is 94 (I misremembered), the 146 no. I believe includes directly exported energy (petroleum, coal). I did the calculations in gory detail for a MacKay style analysis from NZ Energy file. -
Berényi Péter at 08:09 AM on 14 July 2010Hotties vs Frosties?
#168 scaddenp at 07:09 AM on 14 July, 2010 Your point? [...] The 91kWh/p/d I quoted was for NZ (consumption). Sorry, I've misunderstood you. I had no way to know you were from New Zealand. However, total primary energy consumption in NZ is 146 kWh/p/d, not 91. That's only the approximate portion coming from coal, oil and natural gas (more like 95 kWh/p/d). The 35% renewable is nice (15% in the US), but you are lucky. Low population density, high geopotential and precipitation makes hydro an option. -
chris at 08:08 AM on 14 July 2010Watts Up With That concludes Greenland is not melting without looking at any actual ice mass data
Berényi Péter at 05:05 AM on 14 July, 2010 No, that's not correct Peter. Remember that the thermal expansion coefficient of water has a strong temperature dependence, and temperature obviously isn't constant as in your statement. The thermal expansion coefficient is larger for warmer waters than cooler waters. The consequence is that the deposition of 1 kcal (say) of thermal energy in the warmer upper mixed-layer of the ocean will cause a larger volume expansion than if the same quantity of heat is deposited in the cold deeper ocean (say below the thermocline). This effect of depth (temperature)-dependent thermosteric contributions to sea level rise have been described in early studies of sea level responses to warming: e.g. Wigley, TML and Raper SCB (1987) Thermal-expansion of sea-water associated with global warming Nature 330, 127-131. and you can find it stated rather explicitly in Trenberth's review that I linked to in a post above. e.g. see bottom of page 21 to top page 22:"Sea level rise from thermal expansion depends greatly on where the heat is deposited as the coefficient of thermal expansion varies with temperature and pressure. The warming required to produce 1 mm SLR if the heat is deposited in the top 700 m of the ocean can take from 50 to 75 x 10^20 J, or ~ 110 x 10^20 J if deposited below 700 m depth [14]."
In other words, some of the apparent shortfall in the thermosteric (ocean heat absorption) contribution to sea level rise during the period ~ 2003/4-2007/8 may be due to a larger than "average" transfer of heat to the somewhat deeper layers of the ocean. -
villabolo at 07:45 AM on 14 July 2010Watts Up With That concludes Greenland is not melting without looking at any actual ice mass data
For those who could use a few laughs please link up to WUWT where Steven Goddard is getting pummeled by several posters on that issue. I provide an example below. _____________________________________________________ stevengoddard says: July 13, 2010 at 11:52 am Jeff P I am talking about rates of sea level rise. If the rate of ice loss has doubled, then sea level rise would also have to double. ***************************************************** Jeff P says: July 13, 2010 at 12:36 pm “I am talking about rates of sea level rise. If the rate of ice loss has doubled, then sea level rise would also have to double.” ————— This is false. This would only be true if the cause of sea level rise was ONLY from ice loss. Clearly this is not the case. If ice loss has gone from something like 50 Gt a year to 100 Gt it has doubled but the impact on sea level rise would be tiny and far below the margin of error for the measurement of sea level rise. A 50 Gt increase in Ice loss would be less than 0.1 mm increase. If you’re saying that ice loss could not have possibly doubled (or even increased) because we aren’t seeing a 3+mm increase in the rate of sea level rise you’re way off base. ****************************************************** stevengoddard says: July 13, 2010 at 1:25 pm Jeff P Uhhmm… You might want to think your sea level argument through a little more carefully. Increasing ocean heat content will also tend to raise sea levels, and makes the the ice melting argument even less tenable. ***************************************************** villabolo says: July 13, 2010 at 1:32 pm Ahhhh . . . Steve, with all due respect. Thermal increase would simply be a CO-FACTOR with ice melt. And where would both come from? -
muoncounter at 07:28 AM on 14 July 2010Watts Up With That concludes Greenland is not melting without looking at any actual ice mass data
NewYorkJ #21: Your map compares the 2000 decade with the 1930s; there's not much difference between those two decades on the graph I snipped from the WUWT article. It would be more informative to map the comparison between the 1980s and the current decade. -
scaddenp at 07:09 AM on 14 July 2010Hotties vs Frosties?
BP - you keep showing this graph as proof of something but you have yet to tell us of what. How does this prove fraud? How about you find us one station where you think the adjustment procedure has been fraudulently done and show us how the adjustment should have been done? "No. In 2004 US primary energy comsumption (achievement at primary energy carriers stressed on the average) was 10,460 Watts/head. If you do the math that comes out as 251.04 kWh/p/d." Which is close enough to 250kWh/p/d which I quoted. Your point? MacKay is giving everyone 125kWh/p/d which is obviously a problem for US citizen but an increase for most of the world. The 91kWh/p/d I quoted was for NZ (consumption). "Think globally, act locally. " Umm, I was. I dont think we are on the same wavelength. And I'll add another defense for windmills. If you find another way to generate energy, then they are relatively easy to remove unlike say hydro. A personal distaste for the aesthetics of windmills (you prefer the look of coal stations?) doesnt seem to stack up against the negative effects from rapid climate change. -
Berényi Péter at 06:35 AM on 14 July 2010Hotties vs Frosties?
#165 Ned at 05:03 AM on 14 July, 2010 The relevance of this all escapes me Don't mull over it too much, I tell you. If wind power is to supply a significant portion of energy on a global scale, the area of industrial wasteland increases by orders of magnitude. Land use is inversely proportional to energy density. It's as simple as that. And Chernobyl does not belong here. It was an absolutely flawed & irresponsible soviet design with no built in structural safety whatsoever. Modern (30+ years old) models can't possibly blow up. -
dansat at 06:34 AM on 14 July 2010Watts Up With That concludes Greenland is not melting without looking at any actual ice mass data
I am about to make my second trip to Greenland. This time to visit the NEEM ice core site. I can tell you there are very few people in Greenland (Scientist or not) who will tell you that Greenland is NOT melting. Dan S WHNT Huntsville AL -
muoncounter at 05:34 AM on 14 July 2010What's in a trend?
I guess I'm not seeing the relationship between these ocean oscillations and the UAH temperatures. Here's a graph of AMO and SOI straight off the PSD data selection plotter.
Here are UAH N hemi ocean LT temps with a smooth curve extracted in the same manner as the polar data in this article. Similarly, I found a long term trend in the AMO time series.
Here are UAH S hemi ocean LT temps with the same curve fit and a long term trend extracted from the SOI.
The two ocean oscillations are certainly out of phase (most of the time); they reach their respective extrema in the late 80's and their long term trends do indeed cross over from time to time. But when the AMO started down, the N hemi LT temps kept going up. And when the SOI started up, the S hemi LT temps also went up. Where's the connection?
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DarkSkywise at 05:14 AM on 14 July 2010Hotties vs Frosties?
....and BP #163: Carrizo Plain Solar Power Plant – Southern California, USA Another "oldie"... but the photovoltaic panels are now in use elsewhere, which isn't too shabby either. So, um, your problem is that they haven't demolished the original sturcture yet? (Like Ned, I don't really get the point here.) -
Berényi Péter at 05:05 AM on 14 July 2010Watts Up With That concludes Greenland is not melting without looking at any actual ice mass data
#25 chris at 04:00 AM on 14 July, 2010 the thermosteric contribution apparently went down a bit (either due to reduced absorption of heat into the ocean or a redistribution of heat to somewhat deeper levels where the thermosteric contribution is suppressed) What do you mean by "to somewhat deeper levels where the thermosteric contribution is suppressed"? In fact at constant temperature volumetric thermal expansion coefficient of seawater increases steadily with pressure. It also increases with pressure if kept at constant potential temperature (when sinking adiabatically). It means if you succeed to push down a body of water with a slightly higher temperature, the deeper it goes the higher its heat content anomaly pushes sea level. Therefore thermosteric contribution is not suppressed by redistribution of heat to somewhat deeper levels, just the opposite. You can check it yourself with this Sea Water Equation of State Calculator tool. -
Ned at 05:03 AM on 14 July 2010Hotties vs Frosties?
For the sake of completeness, here's an abandoned nuclear reactor:
and here's a coal mine:
and here's an abandoned oil field:
and here's a failed dam:
The relevance of this all escapes me, but it seems to be highly meaningful to Berényi Péter....
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DarkSkywise at 05:02 AM on 14 July 2010Hotties vs Frosties?
@BP #161: Kamaoa Wind Farm, South Point, Hawaii, USA I'm curious... what's exactly wrong with early model wind turbines breaking down after 19 years of service? Modern turbines have a life expectancy of 20-30 years, so for a 1987 model, I'd say they held up pretty good. -
Berényi Péter at 04:28 AM on 14 July 2010Hotties vs Frosties?
That's how abandoned solar looks like.
Carrizo Plain Solar Power Plant – Southern California, USA
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chris at 04:25 AM on 14 July 2010Watts Up With That concludes Greenland is not melting without looking at any actual ice mass data
CBDunkerson at 04:14 AM on 14 July, 2010 hmmm....I hadn't thought of that. The answer must be known, but a simple consideration of geometry would tend to support your point. I wonder how significant it is... -
CBDunkerson at 04:14 AM on 14 July 2010Watts Up With That concludes Greenland is not melting without looking at any actual ice mass data
On sea level rise... if we assume that the influx of water and/or thermal expansion are constant then would we not perforce have to expect the rate of sea level rise to decline over time? After all, when sea level goes up X amount it then covers a larger surface area of the planet... which means a greater volume of water will be required to go up X again. So, in order for the rate of sea level rise to increase we'd have to see melt / thermal expansion increasing fast enough to exceed this 'diminishing returns' factor. -
Berényi Péter at 04:07 AM on 14 July 2010Hotties vs Frosties?
And dream version of the one above, for comparison.
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AuntSally at 04:05 AM on 14 July 2010Watts Up With That concludes Greenland is not melting without looking at any actual ice mass data
Re: 19, Dave Springer... Careful not to fall into the trap of viewing sea level as a 1-parameter system. Greenland icemelt is not the only contributing factor to sea level rise. In particular, thermal expansion is the single largest influence. I'm not an expert in the field and I imagine the dynamics are complicated. Nevertheless, I think I can say with confidence that the rate of thermal expansion is tied to where the heat is being transported in the ocean -- tropical vs. polar; surface vs. deep. So just because the Greenland icemelt has increased, other influences -- most likely thermal expansion -- are also playing a significant role. It's like cranking up the furnace in winter and wondering why the house isn't warming as fast as before, without also noting that you also opened a few windows. :) -
Berényi Péter at 04:03 AM on 14 July 2010Hotties vs Frosties?
#160 chris at 02:43 AM on 14 July, 2010 ..it's not like we would run out of wind! I don't think we need to contemplate your unhappy vision of "broken windmills", "dropping parts" and (the horror!) "leaking oil"... It's already happening. Kamaoa Wind Farm, South Point, Hawaii, USA
(click on image for details)
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chris at 04:00 AM on 14 July 2010Watts Up With That concludes Greenland is not melting without looking at any actual ice mass data
Dave Springer at 02:24 AM on 14 July, 2010 I’m not sure that the sea level data merits such detailed analysis. Regression of the satellite data indicates that the sea level rise "flattened" for a period especially between 2006-2008, but has “recovered” such that the current sea level is pretty much smack on the longish term trend. Sea level can vary in the short term by quite large amounts especially during La Nina’s and El Nino’s partly due to water volume expansion changes from changes in shallow water heat content but mostly from changes in surface evaporation and enhanced rainfall on land during La Nina’s (and vice versa for El Nino’s; see for example the top of the left hand column of page 25 of a recent review). That’s likely the cause of the anomalous temporary slow down in sea level during 2006-2008. Otherwise in the period of your graph, the mass volume contribution (from glacier melt) seemingly went up a bit while the thermosteric contribution apparently went down a bit (either due to reduced absorption of heat into the ocean or a redistribution of heat to somewhat deeper levels where the thermosteric contribution is suppressed). That’s the interpretation from direct analyses of mass and heat contributions to sea level rise as described by Cazenve and Llovel earlier this year. I do agree with you that once this internal variability is “averaged out”, one would expect the rate of sea level rise to increase a little if polar ice melt continues to be enhanced. Time will tell…. -
Albatross at 03:47 AM on 14 July 2010Watts Up With That concludes Greenland is not melting without looking at any actual ice mass data
Dave @18, Not sure which data you are looking at. One should look at the data calculated after applying the inverse barometer correction and removing the seasonal signal. Then one gets this. Looking at those U of Colorado data, I cannot see any significant change in the rate of increase over the 2002-2009 period. There was a slow down in 2007-2008, but that may have been associated with the La Nina event. Which goes to illustrate that loss of terrestrial land ice is not the only contributing factor to sea levels. -
robert way at 03:21 AM on 14 July 2010Watts Up With That concludes Greenland is not melting without looking at any actual ice mass data
For the record, not to nitpick. But Altimetry is not used to measure glacier speeds. Radar interferometry is...Response: Nitpick away! Have updated the post, thanks for the correction. -
Jim Eager at 03:07 AM on 14 July 2010Watts Up With That concludes Greenland is not melting without looking at any actual ice mass data
Dave Springer, re the short term negative acceleration in sea level rise, I wonder if the increase in atmospheric water vapour can account for at least part of this. -
MarkR at 03:00 AM on 14 July 2010Watts Up With That concludes Greenland is not melting without looking at any actual ice mass data
I think maybe you missed a trick here John: several papers have used altimetry JUST of the interior and there has been good evidence of thickening in the interior (e.g. Johannesen iirc?). Altimeter data has regularly had problems at getting low elevation (e.g. coastal) ice. This is expected with increased snowfall from greater water vapour content - but it's confusing when you first hear about it and the likes of Monckton and WUWT prey on that. -
NewYorkJ at 02:58 AM on 14 July 2010Watts Up With That concludes Greenland is not melting without looking at any actual ice mass data
Muoncounter (#13), That graph also appears to be just the raw data, lacking the homogeneity adjustment. Nuuk Most of Greenland was indeed on par with today temperature-wise, as was east of the Rockies in the CONUS. That's about the extent of it. Nearly everywhere else (Arctic included) it was consirably warmer. recent decade vs 1930's The double-whammy of greenhouse gases and black carbon is overwhelming a robust natural variation in the Arctic. -
JMurphy at 02:50 AM on 14 July 2010Medieval Warm Period was warmer
MrOTLChamp, firstly you can't use the temperature at one particular spot, in one particular period, to prove a global MWP - which is why you see a difference between the graph and the paper you mention. As for the Northern Hemisphere being warmer than the Southern Hemisphere, have a look at this NASA GISS graph to see the difference between Northern and Southern Hemisphere temperatures in recent times. I'm not directly comparing between now and then but it shows that there is/can be a difference (without the Earth necessarily tipping over too much), particularly due to the amounts of land and sea surfaces. KR has already given you the evidence for the extra reconstructions produced by others apart from Mann. Finally, can you give any other more representative examples as to why you 'don't have much faith in science lately' ? In the meantime, would you know whether the Geological Society of America (Climate Change statement) receives government funds ? If so, how much do they receive ? -
chris at 02:43 AM on 14 July 2010Hotties vs Frosties?
Ned at 01:18 AM on 14 July, 2010 Yes I noticed that Ned. Luckily we posted at more or less the same time, else everyone might have assumed I'd just copied you ;- } Berényi Péter at 01:58 AM on 14 July, 2010 I wonder whether one would need to decommission a wind farm Peter. I would have thought the turbines could simply be replaced/upgraded as required, and as new technologies came on line. It just requires a little bit of creative planning... ..it's not like we would run out of wind! I don't think we need to contemplate your unhappy vision of "broken windmills", "dropping parts" and (the horror!) "leaking oil"... -
Dave Springer at 02:29 AM on 14 July 2010Watts Up With That concludes Greenland is not melting without looking at any actual ice mass data
Didn't mean to say sea level went steadily down. Meant to say the annual rate of sea level rise went steadily down. If rate of meltwater pouring into the ocean doubled one wouldn't reasonably expect that the rate the oceans are rising would decline during the same period.
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