Archives par mot-clé : Temperature

How the Little Ice Age affected South American climate

by Fundação de Amparo à Pesquisa do Estado de São Paulo, July 24, 2018 in ScienceDaily


A new study published in Geophysical Research Journal shows that the so-called Little Ice Age — a period stretching from 1500 to 1850 in which mean temperatures in the northern hemisphere were considerably lower than at present — exerted effects on the climate of South America.

Based on an analysis of speleothems (cave formations) in the Brazilian states of Mato Grosso do Sul and Goiás, the study revealed that in the seventeenth and eighteenth centuries, the climate of southwestern Brazil was wetter than it is now, for example, while that of the country’s Northeast region was drier.

The same Brazilian cave records showed that the climate was drier in Brazil between 900 and 1100, during a period known as the Medieval Climate Anomaly (MCA), when the northern hemisphere’s climate was warmer than it is now.

 

Global Temperature Rise Some 75% Lower Than Models Projected!

by P. Gosselin, July 18, 2018 in NoTricksZone


No matter how hard climate-catastrophe obsessed alarmists attempt to beat out a little doom from the data, their results still fall far way short of their projections. Moreover, the modest warming the planet has seen over the recent decades is tied more to natural cycles.

Chart: P Gosselin, using WoodForTrees data.

IPCC’s Kangaroo Science…To Ignore Over 600 Papers Confirming Major Solar Impact On Climate

by P. Gosselin, July 17, 2018 in NoTricksZone


The upcoming 6th IPCC Sixth Assessment Report will be a “comprehensive assessment of the science” related to climate change and published in 2022. However, don’t expect it to be “comprehensive” at all as hundreds of scientific publications showing profound impacts by sun and oceans will go ignored.

Climate science has turned into a religion that centers on a single act of faith. Human CO2 is changing our climate.

In the past it was always understood that climate was impacted by a vast array of factors, such oceanic cycles, solar cycles, aerosols, cloud cover, etc. to name a few.

Images: NASA (public domain)

Lightning strikes occur in time with the spinning Sun in 150 year old Japanese farm records

by Jo Nova, July 19, 2018 in JoNova


Remarkably, some Japanese families kept weather record diaries in the 1700 and 1800s, and some for as long as 150 years. The connections they reveal are tantalizing but so incomplete. We are trying to fish out primitive signals from murky water. The Sun turns around on itself every 27 days, so these researchers are looking for repeating patterns in lightning that fit, but the poles of the sun spin slower than the equator and the sun spots can take their own time. Hence, it’s not a neat “27″ days.

During periods of high solar activity, they found regular peaks in lightning activity with the right timing, from May to September when the cold Siberian air mass is not so influential.

Other studies we’ve discussed here have investigated long solar cycles on the 11 year or 200 year scales ….

BBC’s Fake Heat Record Claims

by P. Homewood, July 22, 2018 in NotaLotofPeopleKnowThat


Last week, the BBC seriously misled the public about so-called “heat records”, as I noted in this post here.

In particular the BBC made a song and dance about Southern California, even though the LA records were seriously compromised by siting in car parks or next to air conditioning exhaust vents.

But how does the recent Californian heatwave really compare with historical weather?

Fairmont is a rural USHCN station, just 110 km north of LA, and with a long term record dating back to 1922. (There is some data going back to 1909 as well):

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New Science Affirms Arctic Region Was 6°C Warmer Than Now 9000 Years Ago, When CO2 Levels Were ‘Safe’

by K. Richard, July 12, 2018 in NoTricksZone


Unearthed new evidence (Mangerud and Svendsen, 2018) reveals that during the Early Holocene, when CO2 concentrations hovered around 260 ppm, “warmth-demanding species” were living in locations 1,000 km farther north of where they exist today in Arctic Svalbard, indicating that summer temperatures must have been about “6°C warmer than at present”.

Proxy evidence from two other new papers suggests Svalbard’s Hinlopen Strait  may have reached about 5 – 9°C warmer than 1955-2012 during the Early Holocene (Bartels et al., 2018), and Greenland may have been “4.0 to 7.0 °C warmer than modern [1952-2014]” between 10,000 and 8,000 years ago according to evidence found in rock formations at the bottom of ancient lakes (McFarlin et al., 2018).

In these 3 new papers, none of the scientists connect the “pronounced” and “exceptional” Early Holocene warmth to CO2 concentrations.

Global Sea Sea Surface Temperatures Have Seen “Pretty Dramatic Turnaround,” Says 40-Year Meteorologist!

by P. Gosselin, July 15, 2018 in NoTricksZone


Hurricane threat to East Coast due to natural factors

First at his most recent Saturday Summary, the 40-year meteorologist first warns that in-close developing hurricanes of the sort seen in the 1930s are a risk to the US East Coast this year, due the current Atlantic temperature pattern. The reason has nothing to do with CO2 in the atmosphere, but because of natural sea surface temperature cycles.

Sea surface temperatures see “pretty dramatic turnaround”

GLOBAL COOLING: GLOBAL TEMPS HAVE DROPPED BY 0.65C (1.2F DEGREE) SINCE 2016

by Marc Morano, July 13, 2018 in ClimateDepot


The ‘average’ world temperature for June 2018 was +0.21 deg C above the 1981 – 2010 mean.  That represented a decline of about 0.65 deg C from the all-time high of this 39-year record, which was reached in early 2016.  The 0.65 deg C decline represented more than 75% of the amount by which the average temperature had exceeded the 1981 – 2010 mean at the highest point.  Suddenly the fact that some large number of “all-time highs” was being set at the end of June does not seem very significant.”

Conditions for formation of Super El Ninos determined

by Anthony Watts, July 12, 2018 in WUWT


A University of Aizu team has identified two distinct Indo-Pacific processes shaping the unique features and extraordinary ferocity of super El Ninos. A systematic analysis of these processes and their interactions will improve forecasts of the elusive super El Ninos, the researchers claim.

Extremely warm  are a notable feature of the super El Ninos that occurred in 1972, 1982, and 1997. The fact that Pacific Ocean processes responsible for generating regular El Ninos could not explain this key signature of super El Ninos came as a big shock,” says Dachao Jin, co-author of the study.

‘The Earth has a fever’ – the only solution is 14 billion air conditioners

by University of Birmingham, July 10, 2018 in WUWT


According to the report, if we are to take cooling demand seriously, the key stages to move towards a solution for cooling demand are:

  • Reducing the energy required for cooling: getting industry to adopt high efficiency cooling technologies and using maintenance to deliver optimum performance.

  • Reducing the need for cooling through better building design

  • Systems level thinking across built environment and transport

  • Harnessing waste resources: ‘wrong time’ renewables; waste cold; and waste heat.

  • Considering the strategies and skills required for installing appliances and maintaining them in order to maximise efficiency and reduce energy demand

  • Creating a model for delivery of affordable cooling to those in rural and urban communities based on the energy needs of local requirements, rather than imposing a ‘one size fits all’ approach

Ocean Temperature – Part 1

by Irek Zawadzki, July 10, 2018 in SkepticalScience


How have we measured the temperature of the ocean’s upper layer in the last 150 years? How does understanding physical processes and observational errors help to standardise climate data and understand climate change?

Sea surface temperature (SST) is also one of the climate indices with the longest histories of direct measurements. Because ocean makes up about 70% of the total Earth’s surface, changes in the temperature of its surface are a key factor for determining the global temperature of the planet’s surface.