Archives par mot-clé : USA

Scientists Throw Cold Water On Claims Linking Hurricane Florence To Global Warming

by M. Bastasch, September 19, 2018 in ClimateChangeDispatch


Hurricane Florence made landfall on Friday in North Carolina, bringing heavy rains and flooding. But before the storm touched down in the U.S., scientists and news outlets were already linking the storm to global warming.

However, not all scientists agree that man-made warming is making hurricanes, including Florence, bigger, slower and wetter as is often claimed in the media.

Climatologist Judith Curry called efforts by the “mainstream climate community” to link Florence to man-made global warming “woefully inadequate and misleading to scientists, the public and policymakers.”

Heat Analysis of NOAA Data Suggests the US Is Not Seeing Increased Warming

by Leland Park, September 13, 2018 in WUWT


Given the impending global warming crisis declared by scientists, it should be easy to unambiguously demonstrate the crisis from the instrumental record. Unfortunately, when looking at the  high temperature record for the US, it does not show any warming.

Figure 1 illustrates the incremental changes in surface air temperatures based on year to year differences in station average Tmax. The data is from all active stations in the US Historical Climatology Network (USHCN) from 1895 to 2014.

The classic heat equation defines changes in heat content as being proportional to changes in temperature (ΔQ = ƒ{ΔT} ).

Thus, Figure 1 amounts to a depiction of incremental changes in heat content, without scaling in energy units. The overall net temperature change is 0, which means the net change in heat content is also zero (ΔQ = ƒ{ΔT} = ƒ{0} = 0).

Figure 1 Year to Year Heat Changes (ΔT) for the USHCN

Generating energy from sandy rivers—an untapped renewable resource ready for prime time?

by F.  Sotiropoulos, September 2018, in Stony Brook University/ published in Nature 


The use of in-stream flow (or hydrokinetic) energy converters in rivers appears to offer another workable and effective option to expand renewable energy and limit carbon emissions in the United States. While the potential for in-stream flow energy harvesting systems has already been demonstrated for rivers with fixed beds, researchers now developed a scaled demonstration of hydrokinetic energy generated from a river channel with a sandy bed. Their findings, detailed in a new paper published in Nature Energy, showed that the model hydrokinetic power plant can generate energy effectively and safely without undermining the stability of the river geomorphic environment.

Media Claims Of More Heat Waves Refuted By Multiple Recent Studies, Longterm Data

by Dr. S. Lüning and Prof. F. Vahrenholt, August 31, 2018 in NoTricksZone


The playbook is well-known: After a drought, heat wave or flood occurs, journalists and climate alarmists fall all over themselves in the race to issue shrill warnings that this is only the beginning and that it is known that evil climate change is behind it.

This summer of 2018 we experienced again a Central European heat wave. However the usual alarmists failed again to provide any solid statistics on the frequency of heat waves during the last 100 and 1000 years.

Here we are glad to help out by presenting the latest results on heat wave trend in North America. Let’s begin with a spring heat wave in the USA in 2012 which was examined by Dole & Hoerling (2014) within a long-term context. The authors see a purely natural cause behind the unusual heat:

America Had Lower CO2 Emissions Than Paris Climate Accord Signatories

by Stephen Moore, August 20, 2018 in ClimateChangeDispatch


Take a wild guess what country is reducing its greenhouse gas emissions the most? Canada? Britain? France? India? Germany? Japan? No, no, no, no, no and no.

The answer to that question is the United States of America. Wow! How can that be? This must be a misprint. Fake news. America never signed the Kyoto Protocol some two decades ago.

The intensification of the water footprint of hydraulic fracturing

by A.J. Kondash et al., August 15, 2018 in ScienceAdvances


Abstract

Unconventional oil and gas exploration in the United States has experienced a period of rapid growth, followed by several years of limited production due to falling and low natural gas and oil prices. Throughout this transition, the water use for hydraulic fracturing and wastewater production in major shale gas and oil production regions has increased; from 2011 to 2016, the water use per well increased up to 770%, while flowback and produced water volumes generated within the first year of production increased up to 1440%. The water-use intensity (that is, normalized to the energy production) increased ubiquitously in all U.S. shale basins during this transition period. The steady increase of the water footprint of hydraulic fracturing with time implies that future unconventional oil and gas operations will require larger volumes of water for hydraulic fracturing, which will result in larger produced oil and gas wastewater volumes.

Climate Scientist Calls Out Media (and Mann) ‘Misinformation’ On Wildfires And Global Warming

by Michaele Bastach, August 10, 2018 in WUWT


With wildfires engulfing over 620,000 acres of California, there’s been a concerted media campaign to single out man-made global warming as the primary force behind the deadly blazes.

But that’s not what the data suggests, according to University of Washington climate scientist Cliff Mass.

“So there is a lot of misinformation going around in the media, some environmental advocacy groups, and some politicians,” Mass wrote in the first of a series of blog posts analyzing the California wildfires.

Tornadoes : Historical Records and Trends

by NOAA, August 2018


One of the main difficulties with tornado records is that a tornado, or evidence of a tornado must have been observed. Unlike rainfall or temperature, which may be measured by a fixed instrument, tornadoes are short-lived and very unpredictable. If a tornado occurs in a place with few or no people, it is not likely to be documented. Many significant tornadoes may not make it into the historical record since Tornado Alley was very sparsely populated during the 20th century.

Much early work on tornado climatology in the United States was done by John Park Finley in his book Tornadoes, published in 1887. While some of Finley’s safety guidelines have since been refuted as dangerous practices, the book remains a seminal work in tornado research. The University of Oklahoma created a PDF copy of the book and made it accessible at John Finley’s Tornadoes(link is external)

See also here

US Instrumental Records Indicate More Heat Waves Occurred In the 1930s Than Today

by K. Richard, August 6, 2018 in NoTricksZone


During the 1930s, when the atmospheric CO2 concentration was about 100 ppm lower than today (310 ppm vs. 410 ppm), United States heat waves were just as if not more common than recent decades.

Recently there has been much ado about heat waves and the hottest-ever-recorded-temperatures making their rounds in Northern Hemisphere summer.

Yet scientists have determined that heat waves are largely driven by natural variability, not anthropogenic CO2 emissions.

..

Science studies say heatwaves were more common in USA during the 1930’s

by Anthony Watts, August 6, 2018 in WUWT


During the 1930s, when the atmospheric CO2 concentration was about 100 ppm lower than today (310 ppm vs. 410 ppm), United States heat waves were just as if not more common than recent decades.

Recently there has been much ado about heat waves and the hottest-ever-recorded-temperatures making their rounds in Northern Hemisphere summer.

Yet scientists have determined that heat waves are largely driven by natural variability, not anthropogenic CO2 emissions.

‘This Is How Global Warming Will Play Out:’ 1931 Ocean Temp Record Broken By…0.2 Degrees?

by Mike Bastach, August 5, 2018 in WUWT


….

But while Scripps is trying to tie the record-high ocean reading to the broader wave of media coverage on global heat waves, there are a few caveats to note about what the scientists found.

First, these measurements are taken from a pier that’s near the shoreline, which would not necessarily make it representative of the entire Pacific Ocean, and therefore easily influenced by local weather events.

The “anomalously warm temperatures for the past week” that Scripps researchers observed at their pier somewhat mirror the temperature pattern in 1931, and indeed, the daily records broken in the past week have been very close to readings from 87 years ago.

There is an upward trend in temperature readings from Scripps’ pier, but the trend seems to also broadly coincide with the flipping of a natural ocean cycle, the Pacific Decadal Oscillation, to its warm phase. That flip occurred around 1976.

A Geological Perspective of Wildfires

by David Middleton, July 31, 1018 in WUWT


This post was inspired by Anthony Watts’ recent post about wildfires and their unwillingness to cooperate with the Gorebal Warming narrative.

A Geological Perspective of Wildfires

The Fire Window

Geological evidence for ancient wildfires generally consists of sedimentary charcoal deposits (inertinite).  Fossil charcoal is also a key factor in understanding the evolution of Earth’s atmosphere, particularly oxygen content.  The first clear evidence of fire is in the Late Silurian.

The Completely Fake Time Of Observation Bias

by Tony Heller, July 30, 2018 in ClimateChangeDispatch


In 1999, NASA’s James Hansen was concerned that the very high-quality US temperature record didn’t match Hansen’s fake global warming trend.

How can the absence of clear climate change in the United States be reconciled with continued reports of record global temperature? Part of the “answer” is that U.S. climate has been following a different course than global climate, at least so far. Figure 1 compares the temperature history in the U.S. and the world for the past 120 years.

in the U.S. there has been little temperature change in the past 50 years, the time of rapidly increasing greenhouse gases — in fact, there was a slight cooling throughout much of the country …