Scientists: ‘Loud Divergence Between Sea
Level Reality And Climate Change Theory’
Global Sea Level ‘Acceleration’ Just 0.002 mm/year²
According to peer-reviewed, “consensus” climate science, anthropogenic CO2 emissions are the cause of Arctic sea ice decline. In fact, peer-reviewed, “consensus” climate science indicates the causal relationship is so direct and so linear that it can be said with confidence that we humans melt one square foot of sea ice for every 75 miles we travel in a gasoline-powered engine.
The modeled results are even more alarming for the polar ice sheets. Like Arctic sea ice, the peer-reviewed, “consensus” climate science says that there is a direct, causal relationship between the magnitude of our CO2 emissions and the magnitude of polar ice sheet melt. Therefore, by driving our vehicles and heating our homes we are catastrophically melting the Antarctic and Greenland ice sheets to such a degree that our CO2 emissions will likely cause sea levels to rise 10 feet during the next 50 years (by 2065).
Ten feet is the equivalent of about 3.05 meters of sea level rise by 2065.
So, according to peer-reviewed, “consensus” climate science, the catastrophic melting of the polar ice sheets will produce 0.61 of a meter of sea level rise per decade, which is 61 mm/year, over the course of the next 50 (now 48 – a 2015 paper) years. To achieve this, more than an order of magnitude greater sea level rise acceleration will need to begin . . . immediately.
The trouble is, the physics, and reality, do not support “mainstream” climate science models predicated on anthropogenic CO2 emissions as the principal driver of ice sheet melt and sea level rise. For example:
1. East Antarctica, which comprises two-thirds of the continent, has been gaining mass since 2003 (Martín-Español et al., 2017).
2. The Western Antarctic Peninsula has been rapidly cooling since 1999 (-0.47°C per decade), reversing the previous warming trend and leading to “a shift to surface mass gains of the peripheral glacier” (Oliva et al., 2017).
3. The Greenland ice sheet (GIS) has been melting so slowly and so negligibly in recent decades that the entire ice sheet’s total contribution to global sea level rise was a mere 0.39 of a centimeter (0.17 to 0.61 cm) between 1993 and 2010 (Leeson et al, 2017) . That’s a sea level rise contribution of about 0.23 mm/year since the 1990s, which is a canyon-sized divergence from the 61 mm/year that adherents of peer-reviewed, “consensus” climate science have projected for the coming decades.
And now Australian scientists have published a new paper in the journal Earth Systems and Environment that “does not support the notion of rapidly changing mass of ice in Greenland and Antarctica“. The paper highlights the “loud divergence between sea level reality” and “the climate models [that] predict an accelerated sea-level rise driven by the anthropogenic CO2 emission“.
In fact, the key finding from the paper is that long-term observations from tide gauges reveal a “recent lack of any detectable acceleration in the rate of sea-level rise“. The modern rate of sea level rise acceleration – 0.002 mm/year² – is so negligible it falls well below the threshold of measurement accuracy.
The lack of a detectable global-scale sea level rise acceleration recorded in tide gauge measurements isn’t a novel finding. In recent years, dozens of other scientists have bravely come forward to challenge “consensus” modeling that implicates anthropogenic CO2 emissions as the preeminent cause of ice sheet melt and sea level rise.
Perhaps at some point “consensus”-based climate science will jettison its focus on models and projections of perilous future climate states directly caused by anthropogenic CO2 emissions and instead embrace the observational evidence that may undermine the alarm.
Until then, we will likely need to continue learning about how many millimeters we humans raise sea levels for each kilometer we drive in our fossil-fuel-powered vehicles. Because that’s how “consensus” climate science works.
[L]ocal sea-level forecasts should be based on proven local sea-level data. Their naïve averaging of all the tide gauges included in the PSMSL surveys showed ‘‘relative’’ trends of about + 1.04 mm/year (570 tide gauges of any length). By only considering the 100 tide gauges with more than 80 years of recording, the average trend was only + 0.25 mm/year [2.5 centimeters per century]. This naïve averaging has been stable in recent decades, and it shows that the sea levels are slowly rising but not significantly accelerating. They conclude that if the sea levels are only oscillating about constant trends everywhere, then the local patterns may be used for local coastal planning without any need to use purely speculative global trends based on emission scenarios.
The loud divergence between sea-level reality and climate change theory—the climate models predict an accelerated sea-level rise driven by the anthropogenic CO2 emission—has been also evidenced in other works such as Boretti (2012a, b), Boretti and Watson (2012), Douglas (1992), Douglas and Peltier (2002), Fasullo et al. (2016), Jevrejeva et al. (2006), Holgate (2007), Houston and Dean (2011), Mörner 2010a, b, 2016), Mörner and Parker (2013), Scafetta (2014), Wenzel and Schröter (2010) and Wunsch et al. (2007) reporting on the recent lack of any detectable acceleration in the rate of sea-level rise. The minimum length requirement of 50–60 years to produce a realistic sea-level rate of rise is also discussed in other works such as Baart et al. (2012), Douglas (1995, 1997), Gervais (2016), Jevrejeva et al. (2008), Knudsen et al. (2011), Scafetta (2013a, b), Wenzel and Schröter (2014) and Woodworth (2011).
[T]he information from the tide gauges of the USA and the rest of the world when considered globally and over time windows of not less than 80 years […] does not support the notion of rapidly changing mass of ice in Greenland and Antarctica as claimed by Davis and Vinogradova (2017). The sea levels have been oscillating about a nearly perfectly linear trend since the start of the twentieth century with no sign of acceleration. There are only different phases of some oscillations moving from one location to another that do not represent any global acceleration.
The global sea-level acceleration is therefore in the order of + 0.002 ± 0.003 mm/year², i.e. + 2 ÷ 3 μm/year², well below the accuracy of the estimation. This means that the sea levels may rise in the twenty-first century only a few centimeters more than what they rose during the twentieth century. This is by no means alarming.
The information from the tide gauges of the USA does not support any claim of rapidly changing ice mass in Greenland and Antarctica. The data only suggest the sea levels have been oscillating about the same trend line during the last century and this century.
Other New Supporting Papers Indicating No Anthropogenic Sea Level Rise Signal
The analysis in this paper is based on a recently developed analytical package titled ‘‘msltrend,’’ specifically designed to enhance estimates of trend, real-time velocity, and acceleration in the relative mean sea-level signal derived from long annual average ocean water level time series. Key findings are that at the 95% confidence level, no consistent or compelling evidence (yet) exists that recent rates of rise are higher or abnormal in the context of the historical records available across Europe, nor is there any evidence that geocentric rates of rise are above the global average. It is likely a further 20 years of data will distinguish whether recent increases are evidence of the onset of climate change–induced acceleration.
Detrended correlation analysis of a global sea level reconstruction 1807-2010 does not show that changes in the rate of sea level rise are related to the rate of fossil fuel emissions at any of the nine time scales tried. The result is checked against the measured data from sixteen locations in the Pacific and Atlantic regions of the Northern Hemisphere. No evidence could be found that observed changes in the rate of sea level rise are unnatural phenomena that can be attributed to fossil fuel emissions. These results are inconsistent with the proposition that the rate of sea level rise can be moderated by reducing emissions. It is noted that correlation is a necessary but not sufficient condition for a causal relationship between emissions and acceleration of sea level rise.
Together with a general sea-level rise of 1.18 mm/y, the sum of these five sea-level oscillations constitutes a reconstructed or theoretical sea-level curve of the eastern North Sea to the central Baltic Sea … which correlates very well with the observed sea-level changes of the 160-year period (1849–2009), from which 26 long tide gauge time series are available from the eastern North Sea to the central Baltic Sea. Such identification of oscillators and general trends over 160 years would be of great importance for distinguishing long-term, natural developments from possible, more recent anthropogenic sea-level changes. However, we found that a possible candidate for such anthropogenic development, i.e. the large sea-level rise after 1970, is completely contained by the found small residuals, long-term oscillators, and general trend. Thus, we found that there is (yet) no observable sea-level effect of anthropogenic global warming in the world’s best recorded region.
Building up on the relationship between thermocline and sea level in the tropical region, we show that most of the observed sea level spatial trend pattern in the tropical Pacific can be explained by the wind driven vertical thermocline movement. By performing detection and attribution study on sea level spatial trend patterns in the tropical Pacific and attempting to eliminate signal corresponding to the main internal climate mode, we further show that the remaining residual sea level trend pattern does not correspond to externally forced anthropogenic sea level signal. In addition, we also suggest that satellite altimetry measurement may not still be accurate enough to detect the anthropogenic signal in the 20-year tropical Pacific sea level trends.
Here we address the question as to whether the recent decadal trends in the tropical Pacific atmosphere-ocean system are within the range of internal variability, as simulated in long unforced integrations of global climate models. We show that the recent trends are still within the range of long-term internal decadal variability.
Global Sea Levels Actually Rising About 1 mm/yr… Not 3+ mm/yr
Global averaged sea-level rise is estimated at about 1.7 ± 0.2 mm year−1 (Rhein et al. 2013), however, this global average rise ignores any local land movements. Church et al. (2006) and J. A. Church (2016; personal communication) suggest a long-term average rate of relative (ocean relative to land) sea-level rise of ∼1.3 mm year. …The data show no consistent trend in the frequency of flooding over the 122-year [1892-2013] duration of observations despite persistent warming of air temperatures characterized in other studies. On the other hand, flood frequencies are strongly influenced by ENSO phases with many more floods of any height occurring in La Niña years. … In terms of flood heights, a marginal statistically significant upward trend is observed over the entire sequence of measurements. However, once the data have been adjusted for average sea-level rise of 1.3 mm year−1 over the entire length of the record, no statistical significance remains, either for the entire record, or for the shortened series based on higher quality data. The analysis of the uncorrected data shows how the choice of starting points in a time series can lead to quite different conclusions about trends in the data, even if the statistical analysis is consistent. … In short, we have been unable to detect any influence of global warming at this tropical location on either the frequency, or the height of major flooding other than that due to its influence on sea-level rise.
Our study focuses on the time series of Alicante, in Spain, Marseille, in France, Genoa, Marina di Ravenna (formerly Porto Corsini), Venice and Trieste, in Italy. After removing the vertical land motions in Venice and Marina di Ravenna, and the inverted barometer effect at all the sites, the linear long period sea-level rates were estimated. The results are in excellent agreement ranging between + 1.2 and + 1.3 mm/year for the overall period from the last decades of the 19th century till 2012. The associated errors, computed by accounting for serial autocorrelation, are of the order of 0.2–0.3 mm/year for all stations, except Alicante, for which the error turns out to be 0,5 mm/year. … Our estimated rates for the northern Mediterranean, a relatively small regional sea, are slightly lower than the global mean rate, + 1.7 ± 0.2 mm/year, recently published in the IPCC AR5 (Intergovernmental Panel on Climate Change 5th Assessment Report) (Church et al., 2013), but close enough, if uncertainties are taken into account. It is known that Mediterranean stations had always had lower trends than the global-average ones. Our regional results, however, are in close agreement with the global mean rate, + 1.2 mm/year, published by Hay et al. (2015) which is currently being discussed by the oceanographic community.
Global tide gauge data sets may vary between +1.7 mm/yr to +0.25 mm/yr depending upon the choice of stations. At numerous individual sites, available tide gauges show variability around a stable zero level. Coastal morphology is a sharp tool in defining ongoing changes in sea level. A general stability has been defined in sites like the Maldives, Goa, Bangladesh and Fiji. In contrast to all those observations, satellite altimetry claim there is a global mean rise in sea level of about 3.0 mm/yr. In this paper, it is claimed that the satellite altimetry values have been “manipulated”.
In this situation, it is recommended that we return to the observational facts, which provides global sea level records varying between ±0.0 and +1.0 mm/yr; i.e. values that pose no problems in coastal protection.
October 30, 2017 at 03:46AM