Archives par mot-clé : History

Changes in the Rate of Sea Level Rise

by Willis Eschenbach, May 22, 2018 in WUWT


There’s been some discussion of the rate of sea level rise lately, so I thought I’d take a look at some underlying data.

I started with a 2016 paper by the modern master of failed serial doomcasting, James Hansen. It has the frightening title of Ice melt, sea level rise and superstorms: evidence from paleoclimate data, climate modeling, and modern observations that 2°C global warming could be dangerous… yikes! Be very afraid!

In Figure 29 of that paper, Hansen claims to show that sea level rise has been accelerating, from 0.6 mm/year from 1900 to 1930, to 1.4 mm/year from 1930 to 1992, and 2.6 mm/year from 1993 to 2015.

(…)

No Long-term Warming in a 300-Year Temperature Reconstruction for the Tibetan Plateau

by Li M. et al., 2017 in CO2Science/Int.J.Biometeorology


In discussing the characteristics of their three-century temperature proxy, the authors report the existence of two prominent decadal-scale cold periods (1801-1833 and 1961-2003) and two prominent decadal-scale warm periods (1730-1800 and 1928-1960). They also note that “fifteen extreme cold years (< -1.5σ) were identified and most occurred within 1-2 years after major volcanic eruptions,” contrasting with the finding that the two decadal-scale warm periods both occurred during “gaps in volcanic activities.”

Perhaps the most significant observation made by the authors, however, is that “none of the extreme warm years [< 1.5σ] or decades occurred in the most recent 30 years,” which fact runs counter to anthropogenic global warming claims that temperatures of the past few decades have been the warmest of the past thousand years (…)

The Midwest Heatwave Of May, 1934

by Tony Heller, May 12, 2012 in TheDeplorableClimSciBlog


Ninety-five degree temperatures were common in the Midwest during May prior to 1940, but almost never happen any more. May afternoon temperatures have been declining in the Midwest since the 19th century. The hottest May (by far) was 1934, when 100 degree temperatures were widespread across the Midwest, including 101 degrees at Algona, Iowa on May 7th, 1934.

See also The Good News And The Bad News

Volcanic hazard scenarios: Mount Taranaki, New Zealand

by Geological Society of America, May 3, 2018 in ScienceDaily


Over the last 5000 years, Mount Taranaki volcano, located in the westernmost part of New Zealand’s North Island, produced at least 16 Plinian-scale explosive eruptions, the latest at AD 1655. These eruptions had magnitudes of 4 to 5, eruptive styles, and contrasting basaltic to andesitic chemical compositions comparable to the eruptions of Etna, 122 BC; Vesuvius, AD79; Tarawera, 1886; Pelée, 1902; Colima, 1910; Mount Saint Helens, 1980; Merapi, 2010; and Calbuco, 2015.

Unusual climate during Roman times plunged Eurasia into hunger and disease

by S. Writers,  April 16, 2018 in TerraDaily


A recent study published in an esteemed academic journal indicates that volcanic eruptions in the mid 500s resulted in an unusually gloomy and cold period. A joint research project of the Chronology Laboratory of the Finnish Museum of Natural History and Natural Resources Institute Finland (Luke) suggests that the years 536 and 541-544 CE were very difficult for many people.

Also here in Nature, University of Helsinki

New study reveals increased snowfall in Antarctica over last two centuries

British Antarctic Survey, April 9, 2018


Presenting this week (Monday 9 April 2018) at the European Geosciences Union (EGU) meeting in Vienna, an international team, led by British Antarctic Survey, describes how analysis of 79 ice cores collected from across Antarctica reveals a 10% increase in over the last 200 years.  This is equivalent to 272 giga tonnes of water – double the volume of the Dead Sea.

Lead author and ice core scientist Dr Liz Thomas from British Antarctic Survey explains: (…)

 

During The 800s-1300s AD, Wine Grapes Were Grown At Latitudes Where Polar Bears Now Roam

by K. Richard, April 2, 2018


Canada’s stable-to-increasing polar bear population extends its range slightly further south of the 55th parallel (York et al., 2016).

According to published geological evidence from the 1950s, remnants of wine grape vineyards have been unearthed in regions as far north as the polar-bear-inhabiting 55th parallel during the Medieval Warm Period (~800s to 1300s AD).

(…)

Climatic Cycles Globally…Spitzbergen Weather Records Show It Was Just As Warm 70 Years Ago!

by P. Gosselin, April 8, 2018 in NoTricksZone


On Spitzbergen it was as warm 70 years ago as it is today

By Dr. Sebastian Lüning and Prof. Fritz Vahrenholt
(German text translated by P Gosselin)

Newspapers like to write about heat and melt records in the Arctic, which supposedly had never happened before. That really sparks fear among the citizens. However an examination of the facts regularly brings amazing things to light, for example weather records from a German station on Spitzbergen during World War 2 for the period of 1944-1945.

In the journal International Journal of Climatology Rajmund Przybylak and his colleagues evaluated the data. Summary: Back then it was similarly warm as it is today

Terminal Pleistocene epoch human footprints from the Pacific coast of Canada

by D.C. McLaren et al., 2018 in PLOS.ONE


Little is known about the ice age human occupation of the Pacific Coast of Canada. Here we present the results of a targeted investigation of a late Pleistocene shoreline on Calvert Island, British Columbia. Drawing upon existing geomorphic information that sea level in the area was 2–3 m lower than present between 14,000 and 11,000 years ago, we began a systematic search for archaeological remains dating to this time period beneath intertidal beach sediments (…)

LES EVENEMENTS CLIMATIQUES EXTREMES DU PASSE (18)

by Jo Moreau, 25 mars 2018 in Belgotopia


Suite n° 18. (anno 1800-1849)

“Le contenu de la mémoire est fonction de la vitesse de l’oubli”

Désormais, chaque inondation quelque peu catastrophique, chaque tornade, chaque anomalie météorologique est rattachée au réchauffement climatique qui parait-il nous menace, mais dont en plus l’homme serait responsable !

Pourtant, la consultation de chroniques ou récits anciens est révélatrice de précédents tout aussi apocalyptiques, et relativise la notion même de “changements climatiques”, ainsi que la définition d’un “climat stable” qui n’a jamais existé mais qu’on voudrait instaurer à tout prix.

Long Temperature Records and Sunspot Minima

by Willy Eschenbach, March 18, 2018 in WUWT


Well, folks were complaining that my graph of the CET compared to the centennial solar minima was just one location, England. So here are the five European temperature records which start before 1815. Now, if the theory of the solar/temperature connection is correct, the temperatures should start trending downward when the solar minima start, and they shouldn’t start warming back up until the sunspots get numerous again after the end of the minima. Here are the records so you can see if they agree with the theory.

(…) As you can see, there is no obvious sign that the solar minima have caused any change in the temperature. Some go up, some go down, some go nowhere.(…)

See also here Approaching ‘grand solar minimum’ could cause global cooling