Sentences with phrase «during global cooling periods»

During global cooling periods, there is less ocean evaporation, fewer clouds, lower albedo, which allows more TSI to hit the earth's surface, thus preventing snowball earth.

This is where we can expect to find warmth and more rain during a global cooling period.

Not exact matches

As discussed elsewhere on this site, modeling studies indicate that the modest cooling of hemispheric or global mean temperatures during the 15th - 19th centuries (relative to the warmer temperatures of the 11th - 14th centuries) appears to have been associated with a combination of lowered solar irradiance and a particularly intense period of explosive volcanic activity.

The main point is that just as surface temperatures has experienced periods of short term cooling during long term global warming, similarly the ocean shows short term variability during a long term warming trend.

One thing I note in the 1900 - present graph is that the summer ice levels start dropping in the 1950's during the cool period of recent global warming.

One, the major global cooling in the Southern Hemisphere during the period 1940 - 1960 takes place in the early part of the period before the aerosol build up, which according to the theory, mostly affected the industrialized Northern Hemisphere.

Trenberth has the burden to prove that: Anthropogenic global warming cause greater suffering and loss than during nature driven global warming than global cooling periods.

Likewise headlines such as ««U.S. Scientist Sees New Ice Age Coming,» «Washington Post», July 9, 1971 (the scientist in question being a colleague of Dr. Hansen) or Holdren in 1971 predicting an ice age (http://www.zombietime.com/zomblog/?p=873), (although, to be fair, in the same book he simultaneously predicted global warming), or books from 1977 quoting the CIA: «The studies conclude that the world is entering a difficult period during which major climate change (further cooling) is likely to occur.»

There seems to have been a period of global warming during the 1910s - 1940s, and before that, a period of global cooling during the late 19th century.

-- Lyu et al., 2016 Within the last 1,000 years, global - scale surface temperatures underwent a warm period during Medieval times, centennial - scale cooling during the 14th to 19th centuries, and another warm period since the early 20th century.

lends support to the idea that a period of global cooling occurred later during the mid-twentieth century as a result of sulphate aerosols being released during the 1950s with the rise of industrial output.

For instance, extreme weather events occurred with about the same frequency during the 1945 - 77 global cooling period as they do today, yet no climate scientist pointed to human activity as being responsible in the earlier period.

Stepping back from there, Hansen looks at 1940 and above: «The approximate stand - still of global temperature during 1940 - 1975 is generally attributed to an approximate balance of aerosol cooling and greenhouse gas warming during a period of rapid growth of fossil fuel use with little control on particulate air pollution, but quantitative interpretation has been impossible» That's the excuse and it is laughable.

The approximate stand - still of global temperature during 1940 - 1975 is generally attributed to an approximate balance of aerosol cooling and greenhouse gas warming during a period of rapid growth of fossil fuel use with little control on particulate air pollution, but quantitative interpretation has been impossible because of the absence of adequate aerosol measurements.

During this two - week transition period, any water vapor excess (or deficit) relative to the equilibrium distribution did of course produce a radiative greenhouse heating (or cooling) effect, but this «virtual forcing» was very transient in nature, without any lasting impact on the global temperature.

Another paper discusses how atmospheric humidity increased during the recent period of pronounced global warming (from about the late 1970s to the present), with a humidity decrease during the cooling / temperature stagnation period of ~ 1940s to the 1970s:

For Example, you see on Board Reader — e.g., «As Dr. Pielke, Senior has said, in a period when the oceans are cooling there is no global warming during that period.

This period has been widely studied because the radiative forcings and boundary conditions are relatively well known and because the global cooling during that period is comparable with the projected warming over the 21st century.

It seems for instance there is a 1 Kyear natural cycle leading to RWP about 2 Kyears ago and a MWP about 1 Kyear ago... See for illustration Ljungqvist 2010 Actually Global Warming observed during 19th and 20th centuries is very likely corresponding to LIA recovery, i.e. from the cool period of this 1 Kyear cycle.

And as the evidence reveals, the Obama / Kerry climate - porn duo exist during a period of cooling, not the extreme accelerating global warming that they claim.

The approximate stand - still of global temperature during 1940 - 1975 is generally attributed to an approximate balance of aerosol cooling and greenhouse gas warming during a period of rapid growth of fossil fuel use with little control on particulate air pollution, but satisfactory quantitative interpretation has been impossible because of the absence of adequate aerosol measurements.

If you average everything out, global temperatures during this period were actually COOLER than they are now.

A study published Wednesday in Science Advances confirms once again that there was no global warming hiatus or cooling period during the past 20 years, an idea that had previously been raised in earlier assessments of sea surface temperature data.

In terms of global phenomena, it seems rather than regions which have always cooled and warmed during global warming or cooling trends, the metric of rising sea levels [which have been occurring throughout our current interglacial period [10,000 years] should be metric used.

The approximate stand - still of global temperature during 1940 - 1975 is generally attributed to an approximate balance of aerosol cooling and greenhouse gas warming during a period of rapid growth of fossil fuel use with little control on particulate air pollution -LSB-...]»

The North Atlantic is believe to have been warmer during the MWP, but global climate reconstructions show that the rest of the world was likely cooler during the same period, meaning that the MWP was a regional climate change rather than a global one.

The models heavily relied upon by the Intergovernmental Panel on Climate Change (IPCC) had not projected this multidecadal stasis in «global warming»; nor (until trained ex post facto) the fall in TS from 1940 - 1975; nor 50 years» cooling in Antarctica (Doran et al., 2002) and the Arctic (Soon, 2005); nor the absence of ocean warming since 2003 (Lyman et al., 2006; Gouretski & Koltermann, 2007); nor the onset, duration, or intensity of the Madden - Julian intraseasonal oscillation, the Quasi-Biennial Oscillation in the tropical stratosphere, El Nino / La Nina oscillations, the Atlantic Multidecadal Oscillation, or the Pacific Decadal Oscillation that has recently transited from its warming to its cooling phase (oceanic oscillations which, on their own, may account for all of the observed warmings and coolings over the past half - century: Tsoniset al., 2007); nor the magnitude nor duration of multi-century events such as the Mediaeval Warm Period or the Little Ice Age; nor the cessation since 2000 of the previously - observed growth in atmospheric methane concentration (IPCC, 2007); nor the active 2004 hurricane season; nor the inactive subsequent seasons; nor the UK flooding of 2007 (the Met Office had forecast a summer of prolonged droughts only six weeks previously); nor the solar Grand Maximum of the past 70 years, during which the Sun was more active, for longer, than at almost any similar period in the past 11,400 years (Hathaway, 2004; Solankiet al., 2005); nor the consequent surface «global warming» on Mars, Jupiter, Neptune's largest moon, and even distant Pluto; nor the eerily - continuing 2006 solar minimum; nor the consequent, precipitate decline of ~ 0.8 °C in TS from January 2007 to May 2008 that has canceled out almost all of the observed warming of the 20th cePeriod or the Little Ice Age; nor the cessation since 2000 of the previously - observed growth in atmospheric methane concentration (IPCC, 2007); nor the active 2004 hurricane season; nor the inactive subsequent seasons; nor the UK flooding of 2007 (the Met Office had forecast a summer of prolonged droughts only six weeks previously); nor the solar Grand Maximum of the past 70 years, during which the Sun was more active, for longer, than at almost any similar period in the past 11,400 years (Hathaway, 2004; Solankiet al., 2005); nor the consequent surface «global warming» on Mars, Jupiter, Neptune's largest moon, and even distant Pluto; nor the eerily - continuing 2006 solar minimum; nor the consequent, precipitate decline of ~ 0.8 °C in TS from January 2007 to May 2008 that has canceled out almost all of the observed warming of the 20th ceperiod in the past 11,400 years (Hathaway, 2004; Solankiet al., 2005); nor the consequent surface «global warming» on Mars, Jupiter, Neptune's largest moon, and even distant Pluto; nor the eerily - continuing 2006 solar minimum; nor the consequent, precipitate decline of ~ 0.8 °C in TS from January 2007 to May 2008 that has canceled out almost all of the observed warming of the 20th century.

This data can be compared to global temperatures during the same period, to determine if the Sun is responsible for most of the warming and cooling of our Earth.

Dr. James Hansen said at a July 20 press conference that average global temperatures today are less than a degree cooler than they were during the last major interglacial or «Eemian» period 120,000 years ago, when global temperatures were just 2 °C above the pre-industrial climate and sea levels stood at five to nine metres higher than they are today.

Regardless of the cause, which some have attempted to explain as due to industrial aerosol cooling, one can't accuse CO2 emissions of raising global temperatures during a period when there was no such rise.

-- During the period 1941 - 1975, when global temperatures cooled, giving rise to concerns of a looming ice age, there were 11 years of moderate - to - severe drought.