Sentences with phrase «ocean cooling trend»

McGregor, H. V., et al. (2015), Robust global ocean cooling trend for the pre-industrial Common Era, Nat.

Robust global ocean cooling trend for the pre-industrial Common Era.

Not exact matches

The team identified a cooling trend in the Pacific Ocean and a very slight warming trend in the Atlantic Ocean since the late 1990s.

Since cooler mantle temperatures generally produce less magma, it's a trend that's making modern day ocean crust thinner.

So the report notes that the current «pause» in new global average temperature records since 1998 — a year that saw the second strongest El Nino on record and shattered warming records — does not reflect the long - term trend and may be explained by the oceans absorbing the majority of the extra heat trapped by greenhouse gases as well as the cooling contributions of volcanic eruptions.

Observations of upper ocean heat show some short term cooling but measurements to greater depths (down to 2000 metres) show a steady warming trend: However, the ocean cooling myth does seem to be widespread so I'll shortly update this page to clarify the issue.

In the lower left panel of Figure 1, which shows temperature trends since 1979, the pattern in the Pacific Ocean features warming and cooling regions related to El Niño.

If we think of hurricanes as Stirling heat engines, then we realize that the two reservoirs are the mixed layer of the surface ocean (1) and the upper atmosphere (2); note that there is a general trend of stratospheric cooling as well.

Over the period 1984 — 2006 the global changes are 0.28 °C in SST and − 9.1 W m − 2 in Q, giving an effective air — sea coupling coefficient of − 32 W m − 2 °C − 1... [D] iminished ocean cooling due to vertical ocean processes played an important role in sustaining the observed positive trend in global SST from 1984 through 2006, despite the decrease in global surface heat flux.

Interestingly, they use the ocean heat data with the erroneous 2003 cooling trend (see Figure 5.1).

The main point is that just as surface temperatures has experienced periods of short term cooling during long term global warming, similarly the ocean shows short term variability during a long term warming trend.

Predictions related to the impact of pinatubo, post 1984 trends, the «satellite cooling» mismatch, lgm tropical sst, water vapor increases, ocean heat content etc have all been made and verified within a short time period.

Given how much yelling takes place on the Internet, talk radio, and elsewhere over short - term cool and hot spells in relation to global warming, I wanted to find out whether anyone had generated a decent decades - long graph of global temperature trends accounting for, and erasing, the short - term up - and - down flickers from the cyclical shift in the tropical Pacific Ocean known as the El Niño — Southern Oscillation, or ENSO, cycle.

What happens to global temperature trends when you factor in the potentially confounding influence of ocean warming and cooling cycles?

# 8220; This multi-year Pacific Decadal Oscillation «cool» trend can intensify La Niña or diminish El Niño impacts around the Pacific basin,» said Bill Patzert, an oceanographer and climatologist at NASA's Jet Propulsion Laboratory, Pasadena, Calif. «The persistence of this large - scale pattern [in 2008] tells us there is much more than an isolated La Niña occurring in the Pacific Ocean.»

In contrast to the surface warming trend of the Indian Ocean, Alory et al. (2007) found a subsurface cooling trend of the main thermocline over the Indonesian Throughflow region, that is, near EEIO, in 1960 — 99, the interval using the new Indian Ocean Thermal Archive.

While we might HOPE FOR THE BEST — that there will be a cooling trend (less sun irradiance, etc) to exactly counteract our AGW trend (even so there is the negative effects of CO2, even without the warming — ocean acidification, crop loss to weed, etc)-- we should then be trying to AVERT THE WORST with even more drastic GHG cuts.

One thing I would have liked to see in the paper is a quantitative side - by - side comparison of sea - surface temperatures and upper ocean heat content; all the paper says is that only «a small amount of cooling is observed at the surface, although much less than the cooling at depth» though they do report that it is consistent with 2 - yr cooling SST trend — but again, no actual data analysis of the SST trend is reported.

After JANUARY 2005, they all show a cooling LINEAR trend for the land + ocean anomaly.

As I said before with exception of GISS, the other four organizations who measure global temperatures [land + ocean] show the same cooling trend from 2002.

But as cogently interpreted by the physicist and climate expert Dr. Joseph Romm of the liberal Center for American Progress, «Latif has NOT predicted a cooling trend — or a «decades - long deep freeze» — but rather a short - time span where human - caused warming might be partly offset by ocean cycles, staying at current record levels, but then followed by «accelerated» warming where you catch up to the long - term human - caused trend.

Study of Greenland ice provides a 2500 year perspective indicating we headed into a mini-ice-age as happened from the mid 1300's to the mid 1800's; and the data from the 1200 or so floating buoys around the world's oceans are likewise showing a cooling trend, and have been for some time.

Years - long ocean trends such as El Niño and La Niña cause alternate warming and cooling of the sea surface there, with effects on monsoons and temperatures around the world.

My opinion expressed elsewhere is that almost all the temperature changes we observe over periods of less than a century are caused by cyclical changes in the rate of energy emission from the oceans with the solar effect only providing a slow background trend of warming or cooling for several centuries at a time.

Christy is correct to note that the model average warming trend (0.23 °C / decade for 1978 - 2011) is a bit higher than observations (0.17 °C / decade over the same timeframe), but that is because over the past decade virtually every natural influence on global temperatures has acted in the cooling direction (i.e. an extended solar minimum, rising aerosols emissions, and increased heat storage in the deep oceans).

-- The third, being the observed destabilization of the geosphere due to both the pace of terrestrial ice loss and relatively sudden and uneven climatic redistribution of the oceans» mass, with a consequent rise in seismic events and in volcanoes» cooling sulphate emissions, which have (according to Prof. McGuire, adviser to Munich Re on vulcanism risks) accelerated slowly on a 1.25 % / yr trend over the last 30 years.

A similar cooling trend was reported in the 1993 paper, «Absence of Evidence for Greenhouse Warming over the Arctic Ocean in the Past 40 years».

Ongoing adjustment of the ocean THC is now contributing to a cooling trend in the subpolar Atlantic and an associ - ated slowdown in the rate of Arctic winter sea ice retreat.

Empirically, certain phases of ENSO are known to be associated with trends at the ocean surface that are the reverse of those at deeper layers, consistent with the notion that a positive surface warming is at times an ocean cooling event.

Likewise, the term «global warming» is somewhat problematic as well since the planet isn't warming uniformly — a few places have a short - lived cooling trends — and the word «warming» sounds downright cozy on a cold day, when, in fact, substantially heating of the atmosphere and ocean is happening.)

Figure 1: Short - term cooling trends from Jan»70 to Nov» 77, Nov»77 to Nov» 86, Sep»87 to Nov» 96, Mar»97 to Oct» 02, and Oct»02 to Dec»11 (blue) vs. the 42 - year warming trend (Jan»70 to Dec» 11; red) using NOAA NCDC land - ocean data.

However, the situation is complicated by multiple other factors that include delay in the response of global temperature to regional ENSO phenomena, and the triggering of feedbacks that can heat or cool the ocean in the same direction as surface trends rather than opposing them.

The global warming trend or cooling trend in the air, initiated by the oceans, then leads on to all the variations in both circulations that seem to be causing so much puzzlement.

To point out just a couple of things: — oceans warming slower (or cooling slower) than lands on long - time trends is absolutely normal, because water is more difficult both to warm or to cool (I mean, we require both a bigger heat flow and more time); at the contrary, I see as a non-sense theory (made by some serrist, but don't know who) that oceans are storing up heat, and that suddenly they will release such heat as a positive feedback: or the water warms than no heat can be considered ad «stored» (we have no phase change inside oceans, so no latent heat) or oceans begin to release heat but in the same time they have to cool (because they are losing heat); so, I don't feel strange that in last years land temperatures for some series (NCDC and GISS) can be heating up while oceans are slightly cooling, but I feel strange that they are heating up so much to reverse global trend from slightly negative / stable to slightly positive; but, in the end, all this is not an evidence that lands» warming is led by UHI (but, this effect, I would not exclude it from having a small part in temperature trends for some regional area, but just small); both because, as writtend, it is normal to have waters warming slower than lands, and because lands» temperatures are often measured in a not so precise way (despite they continue to give us a global uncertainity in TT values which is barely the instrumental's one)-- but, to point out, HadCRU and MSU of last years (I mean always 2002 - 2006) follow much better waters» temperatures trend; — metropolis and larger cities temperature trends actually show an increase in UHI effect, but I think the sites are few, and the covered area is very small worldwide, so the global effect is very poor (but it still can be sensible for regional effects); but I would not run out a small warming trend for airport measurements due mainly to three things: increasing jet planes traffic, enlarging airports (then more buildings and more asphalt — if you follow motor sports, or simply live in a town / city, you will know how easy they get very warmer than air during day, and how much it can slow night - time cooling) and overall having airports nearer to cities (if not becoming an area inside the city after some decade of hurban growth, e.g. Milan - Linate); — I found no point about UHI in towns and villages; you will tell me they are not large cities; but, in comparison with 20-40-60 years ago when they were «countryside», many small towns and villages have become part of larger hurban areas (at least in Europe and Asia) so examining just larger cities would not be enough in my opinion to get a full view of UHI effect (still remembering that it has a small global effect: we can say many matters are due to UHI instead of GW, maybe even that a small part of measured GW is due to UHI, and that GW measurements are not so precise to make us able to make good analisyses and predictions, but not that GW is due to UHI).

The near - linear rate of anthropogenic warming (predominantly from anthropogenic greenhouse gases) is shown in sources such as: «Deducing Multidecadal Anthropogenic Global Warming Trends Using Multiple Regression Analysis» «The global warming hiatus — a natural product of interactions of a secular warming trend and a multi-decadal oscillation» «The Origin and Limits of the Near Proportionality between Climate Warming and Cumulative CO2 Emissions» «Sensitivity of climate to cumulative carbon emissions due to compensation of ocean heat and carbon uptake» «Return periods of global climate fluctuations and the pause» «Using data to attribute episodes of warming and cooling in instrumental records» «The proportionality of global warming to cumulative carbon emissions» «The sensitivity of the proportionality between temperature change and cumulative CO2 emissions to ocean mixing»

Volcanic eruptions and El Niño events are identified as sharp cooling events punctuating a long - term ocean warming trend, while heating continues during the recent upper - ocean - warming hiatus, but the heat is absorbed in the deeper ocean.

Interestingly, they use the ocean heat data with the erroneous 2003 cooling trend (see Figure 5.1).

Identify the mechanism that has caused the 38 - year cooling trend in the Southern Ocean and the increase in SH sea ice extent.

Second, a series of mildly explosive volcanoes, which increased stratospheric particles, likely had more of a cooling effect than previously recognized.35, 36,37 Third, the high incidence of La Niña events in the last 15 years has played a role in the observed trends.29, 38 Recent analyses13 suggest that more of the increase in heat energy during this period has been transferred to the deep ocean than previously.

Year - round cooling is evident in the north - western North Atlantic and the central North Pacific Oceans, but the North Atlantic cooling trend has recently reversed.

Prior to the advent of human - caused global warming in the 19th century, the surface layer of Earth's oceans had undergone 1,800 years of a steady cooling trend, according to a new study in the Aug..

«Many climatologists and astrophysicists believe recent sun spot, Pacific Ocean and global temperature trends suggest that our planet may have entered a cool phase that could last for 25 years.

Kevin C's excellent trend tool shows us what the new data mean for the surface temperature trend since 1970: it's about +0.17 C per decade, but there's a range in that because short term wiggles are caused by things like the El Nino - La Nina cycle in the Pacific which warm or cool the atmosphere by storing or releasing heat from the oceans.

To say nothing of the warming trends also noticed in, for example: * ocean heat content * wasting glaciers * Greenland and West Antarctic ice sheet mass loss * sea level rise due to all of the above * sea surface temperatures * borehole temperatures * troposphere warming (with stratosphere cooling) * Arctic sea ice reductions in volume and extent * permafrost thawing * ecosystem shifts involving plants, animals and insects

I do think, however, that it is significant (short term, not a firm trend) that CO2, as measured at MLO, has been increasing at a smaller rate than in previous years despite the fact that overall anthropogenic CO2 output is not decreasing and, furthermore, that the short term trend of the absolute increase is also down which indicates a greater rate of absorption of CO2 than in previous years — which to me would indicate an ongoing cooling of the oceans as per the theory that a cooling ocean absorbs more CO2 while a warming ocean releases more CO2.

More cloud cover on a net global scale means less solar radiation penetrates the surface, which leads to a net cooling, and less cloud cover means more solar radiation penetrates into the (ocean) surface, which ultimately leads to net warming trend.

The pressure error meant that the temperatures were being associated with a point higher in the ocean column than they should have been, and this (given that the ocean cools with depth) introduced a spurious cooling trend when compared to earlier data.

In the picontrol - initialised run thermosteric sea level drops over the first half of the run, hence ocean cooling, whereas the past1000yr - initialised run produces a slight upward trend.

which is why you will see an increased trend in arctic ice extent over the next 20 years plus, along with net cooling of the northern hemisphere, though by your account of the oceans sequestration of CO2, ocean acidification will go through the roof at the same time.

A synthesis of surface - temperature reconstructions shows ocean surface cooling from ad 1 to 1800, with much of the trend from 800 to 1800 driven by volcanic eruptions.