Sunday, November 29, 2020
Home Left Column 30 peer-reviewed scientific papers reveal the lack of connection between hurricanes &...

30 peer-reviewed scientific papers reveal the lack of connection between hurricanes & ‘global warming’

-

Via: http://notrickszone.com/2016/10/10/scientific-consensus-30-papers-global-warming-leads-to-less-intense-less-frequent-hurricanes/

By on 10. October 2016

Below there are 30 peer-reviewed scientific papers that summarize the literature on the lack of connection between ocean temperatures and hurricane variability.  Perhaps Sutter and Mann could find these educational.

No Trend Or Reduced Intensity Of Landfalling Hurricanes With Warming

Perrie et al., 2010

The impact of climate change is seen in slightly decreased intensities in landfalling cyclones.”

Klotzbach and Landsea, 2015

“[T]be global frequency of category 4 and 5 hurricanes has shown a small, insignificant downward trend [1990-2014].”

Zhang et al., 2012

The various SST measures only have a weak influence on TMLGP[tropical cyclones making landfall, South China] intensities. Despite the long-term warming trend in SST in the WNP, no long-term trend is observed in either the frequency or intensities of TMLGP[tropical cyclones making landfall, South China].”

Landsea et al., 1996

A long-term (five decade) downward trend continues to be evident primarily in the frequency of intense hurricanes. In addition, the mean maximum intensity (i.e., averaged over all cyclones in a season) has decreased, while the maximum intensity attained by the strongest hurricane each year has not shown a significant change.”

Hsu et al., 2014

All of the counts, lifespans, and accumulated cyclone energy of the late-season typhoons during the 1995–2011 epoch decreased significantly, compared with typhoons that occurred during the 1979–94 epoch.”

Hoarau et al., 2012

There has been no trend towards an increase in the number of categories 3–5 cyclones over the last 30 years.”

Chang et al., 2016

“Extratropical cyclones cause much of the high impact weather over the mid-latitudes. With increasing greenhouse gases, enhanced high-latitude warming will lead to weaker cyclone activity. Here we show that between 1979 and 2014, the number of strong cyclones in Northern Hemisphere in summer has decreased at a rate of 4% per decade, with even larger decrease found near northeastern North America.”

Wu et al., 2006

[D]ata show a decrease in the proportion of category 4-5 typhoons from 18% to 8% between the two periods of 1977-1989 and 1990-2004 (Table 1; intensity estimates in terms of sustained maximum winds first became available in RSMC-Tokyo best track data in 1977).”

Chan and Liu, 2004

No significant correlation was found between the typhoon activity parameters and local SST [during 1960-2003]. In other words,an increase in local SST [sea surface temperatures] does not lead to a significant change of the number of intense TCs [tropical cyclones]in the NWP, which is contrary to the results produced by many of the numerical climate models.”

Zarzycki, 2016

“Multi-member ensembles show that the overall number of TCs [tropical cyclones] generated by the model is reduced by 5-9% when allowing for two-way air-sea interactions. TC [tropical cyclones] intensity is greatly impacted; the strongest 1% of all TCs are 20-30 hPa (4-8 m s−1) weaker and the number of simulated Category 4 and 5 TCs [tropical cyclones] are reduced by 65% in slab ocean configurations. Reductions in [tropical cyclone] intensity are in line with published thermodynamic theory.”

Blake and Landsea, 2011

[D]uring the 40-year period 1961-2000 both the number and intensity of landfalling U.S. hurricanes decreased sharply.  Based on 1901-1960 statistics, the expected number of hurricanes and major hurricanes during  the period 1961-2000 would have been 77 and 30, respectively. However, only 55 (or 71%) of the expected number of hurricanes struck the U.S. with only 19 major hurricanes (or 63% of that expected number).”

Sanchez and Cavazos, 2014

“[D]uring 1970−2010SST in the MDR [along Mexican coasts]showed a statistically significant increase of 0.57°C over the whole period, but the frequency of HUR4−5 [intense hurricanes, Category 4 and 5] did not show a significant trend, while the frequency of HUR1−5 [weak and intense hurricanes] significantly decreased (−0.95% yr−1).”

Free et al., 2004

“Long-term changes in the intensity of tropical cyclones are of considerable interest because of concern that greenhouse warming may increase storm damage. The PI [potential intensity of tropical cyclones] calculated using radiosonde data at 14 tropical island locations shows only small, statistically insignificant trends from 1980 to 1995 and from 1975 to 1995.  … Between 1975 and 1980, however, while SSTs rose, PI[potential intensity] decreased, illustrating the hazards of predicting changes in hurricane intensity from projected SST changes alone.”

Nott and Hayne, 2001

Our estimate of the frequency of such ‘super-cyclones’ [wind speeds in excess of 182 kilometers per hour] is an order of magnitude higher than that previously estimated.  … [The Great Barrier Reef] experienced at least five such storms over the past 200 years, with the area now occupied by Cairns experiencing two super-cyclones between 1800 and 1870.  The 20th century, however, was totally devoid of such [super-cyclone] storms, with only one such event (1899) since European settlement in the mid-nineteenth century.”

IPCC AR5 (2013) Working Group I, Chapter 2

“In summary, confidence in large scale changes in the intensity of extreme extratropical cyclones since 1900 is low

Reduced Frequency Of Landfalling Hurricanes With Warming

Knutson et al., 2008

“Here we assess, in our model system, the changes in large-scale climate that are projected to occur by the end of the twenty-first century by an ensemble of global climate models, and find that Atlantic hurricane and tropical storm frequencies are reduced. At the same time, near-storm rainfall rates increase substantially. Our results do not support the notion of large increasing trends in either tropical storm or hurricane frequency driven by increases in atmospheric greenhouse-gas concentrations.”

Chenoweth and Divine, 2008

“Our record of tropical cyclone activity reveals no significant trends in the total number of tropical cyclones (tropical storms and hurricanes) in the best sampled regions for the past 318 years. However, the total number of hurricanes in the 20th century is 20% lower than in previous centuries. … Long-term variations in the number of tropical cyclones do not show any evidence of increasing storm frequencyand have declined a nonstatistically significant amount.”

Haig et al., 2014

Australian tropical cyclone activity lower than at any time over the past 550–1,500 years

“The assessment of changes in tropical cyclone activity within the context of anthropogenically influenced climate change has been limited by the short temporal resolution of the instrumental tropical cyclone record (less than 50 years). Furthermore, controversy exists regarding the robustness of the observational record, especially before 1990. Here we show, on the basis of a new tropical cyclone activity index (CAI), that the present low levels of storm activity on the mid west and northeast coasts of Australia are unprecedented over the past 550 to 1,500 years.”

Sugi and Yoshimura, 2012

“We conducted 228-year long, three-member ensemble simulations using a high resolution (60 km grid size) global atmosphere model, MRI-AGCM3.2, with prescribed sea surface temperature and greenhouse gases and aerosols from 1872 to 2099. We found a clear decreasing trend of global tropical cyclone (TC) frequency throughout the 228 years of the simulation.”

Hall and Hereid, 2015

As of the end of the 2014 hurricane season, the US has experienced no major hurricane landfall since Hurricane Wilma in 2005, a drought that currently stands at nine years. Here, we use a stochastic tropical-cyclone model to calculate the mean waiting time for multi-year landfall droughts. We estimate that the mean time to wait for a nine-year drought is 177 years. We also find that the average probability of ending the drought with a major landfall in the next year is 0.39, and is independent of the drought duration, as one would expect for a Bernoulli process.”

Wang and Lee, 2008

“Here we use observational data to show that global warming of the sea surface is associated with a secular increase of tropospheric vertical wind shear in the main development region (MDR) for Atlantic hurricanes. The increased wind shear coincides with a weak butrobust downward trend in U.S. landfalling hurricanes.”

Ha and Zhong, 2015

“Results show that the SCS TC [South China Sea tropical cyclone] activity experienced an abrupt decadal decrease at around 2002/2003. Compared to the TC [tropical cyclone] activities from the early 1990s to 2002, the number of TCs [tropical cyclones] formed in the SCS markedly decreased from 2003 through the early 2010s.”

Callaghan and Power, 2011

The linear trend in the number of severe TCs [tropical cyclones] making land-fall over eastern Australia declined from about 0.45 TCs/year in the early 1870s to about 0.17 TCs/year in recent times—a 62% decline.”

Liu and Chan, 2013

“Tropical cyclone (TC) activity over the western North Pacific (WNP) exhibits a significant interdecadal variation during 1960-2011, with two distinct active and inactive periods each. This study examines changes in TC [tropical cyclone] activity and atmospheric conditions in the recent inactive period (1998-2011). The overall TC [tropical cyclone] activity shows a significant decrease [1960-2011], which is partly related to the decadal variation of TC genesis frequency in the southeastern part of the WNP and the downward trend of TC genesis frequency in the main development region.”

Williams et al., 2016

“Bayesian age–depth models, derived from eight AMS radiocarbon dates, suggest that the frequency of typhoon strikes was 2–5 times greater from 3900 to 7800 cal. yr. BP compared to 0–3900 cal. yr. BP[calendar years before present]. Possible explanations for this variability in the typhoon record are that typhoons were more frequent and/or more intense in Southeast Asia in the mid-Holocene because of climatic changes associated with the Mid-Holocene Warm Period or that the record reflects site sensitivity changes resulting from a mid-Holocene sea-level highstand.”

Dezileau et al., 2016

Storms and tsunamis, which may seriously endanger human society, are amongst the most devastating marine catastrophes that can occur in coastal areas. Many such events are known and have been reported for the Mediterranean, a region where high-frequency occurrences of these extreme events coincides with some of the most densely populated coastal areas in the world. In a sediment core from the Mar Menor (SE Spain), we discovered eight coarse-grained layers which document marine incursions during periods of intense storm activity or tsunami events. Based on radiocarbon dating, these extreme events occurred around 5250, 4000, 3600, 3010, 2300, 1350, 650, and 80 years cal BP. No comparable events have been observed during the 20th and 21st centuries.”

IPCC AR5 (2013) Working Group I, Chapter 2

“Current datasets indicate no significant observed trends in global tropical cyclone frequency over the past century … No robust trends in annual numbers of tropical storms, hurricanes and major hurricanes counts have been identified over the past 100 years in the North Atlantic basin.”

Cooler (Not Warmer) Sea Surface Temps Produce More Frequent, Intense Hurricanes

Sugi et al., 2015

More tropical cyclones in a cooler climate?

Recent review papers reported that many high-resolution global climate models consistently projected a reduction of global tropical cyclone (TC) frequency in a future warmer climate, although the mechanism of the reduction is not yet fully understood. Here we present a result of 4K-cooler climate experiment. The global TC [tropical cyclone] frequency significantly increases in the 4K-cooler climate compared to the present climate. This is consistent with a significant decrease in TC frequency in the 4K-warmer climate.

Nott et al., 2007

“Our record demonstrates that the frequency variability of intense landfalling cyclones is greatest at centennial scale compared to seasonal and decadal oscillations[T]he period between AD 1600 to 1800 [Little Ice Age] had many more intense or hazardous cyclones impacting the site than the post AD 1800 period.”

Degear et al., 2015

“A comparison with North Atlantic and Western Mediterranean paleoclimate proxies shows that the phases of high storm activity occurred during cold periods, suggesting a climatically-controlled mechanism for the occurrence of these storm periods. … Periods of low storm activity occurred from 560 cal yr BC to 140 cal yr AD (SP9 and SP8, Roman Warm Period) and from 820 to 1230 cal yr AD (SP4, Medieval Warm Period).”

Laliberte et al., 2015

“Our work illustrates a major constraint on the large-scale global atmospheric engine: As the climate warms, the system may be unable to increase its total entropy production enough to offset the moistening inefficiencies associated with phase transitions. … On a warming Earth, the increase in perceptible water has been identified as a reason for the tropical overturning to slow down, and studies over a wide range of climates suggest that global atmospheric motions are reduced in extremely warm climates.

- Advertisment -

Related Articles

Antarctica might go green say scientists (only 2km of ice and 50C of warming to go)

http://joannenova.com.au/2017/05/antarctica-might-go-green-say-scientists-only-2km-of-ice-and-50c-of-warming-to-go/ More great journalism from The Guardian: Climate change is turning Antarctica green, say researchers Or maybe it isn’t. Check out the brave actual prediction:...

MIT climate scientist Dr. Richard Lindzen’s talks in Prague

By Dr. Lubos Motl Richard Lindzen's talk in Prague Richard Lindzen, prof emeritus at MIT, is the most famous atmospheric physicist among the climate skeptics. I...

Study: Earth is becoming GREENER, not BROWNER due to climate change

Guest essay by Dr. Patrick J. Michaels It’s hard to say how many punny posts we came up with using those words when Carol...