Sentences with phrase «large climatic warming»

Two weeks ago we looked at the Triassic - Jurassic mass extinction, some 200 million years ago, that was caused by a large climatic warming event after the break - up of supercontinent Pangaea led to the release of enormous amounts of first [volcanic] CO2 and then methane [from disturbed clathrates — a positive warming feedback] into the atmosphere.

Not exact matches

Meanwhile, Ramanathan said that Jacobson's conclusion that black carbon might be the second - largest contributor to warming — behind only CO2 — tracks with his own experiments based on observations of actual climatic conditions.

We know, however, that rapid warming of the planet increases the risk of crossing climatic points of no return, possibly setting in motion large - scale ocean circulation changes, the loss of major ice sheets, and species extinctions.

Honestly, anybody who claims that «there has been global cooling or that global warming has halted since 2000 (or whatever)» really does not understand climatic trends nor the difference between a long - term underlying trend vs. short - term fluctuations which have a larger magnitude (in both directions) than the trend.

Warmest 12 - month periods 1895 - 2012 NOAA National Climatic Data Center At an even larger scale, note that all the 12 warmest 12 - month periods since 1895 have occurred sincWarmest 12 - month periods 1895 - 2012 NOAA National Climatic Data Center At an even larger scale, note that all the 12 warmest 12 - month periods since 1895 have occurred sincwarmest 12 - month periods since 1895 have occurred since 2000.

There is no empirical evidence which confirms that long term, large scale climatic warming is the result of human activity.

Wu, Lee, and Liu (2005) said: «The 1970s North Pacific climate regime shift is marked by a notable transition from the persistent warming (cooling) condition over the central (eastern) North Pacific since the late 1960s toward the opposite condition around the mid 1970s... This large - scale decadal climatic regime shift has produced far - reaching impacts on both the physical and biological environment over the North Pacific and downstream over North America.»

DES MOINES (AP)-- Warmer and wetter weather in large swaths of the country have helped farmers grow corn, soybeans and other crops in some regions that only a few decades ago were too dry or cold, experts who are studying the change said... The change is due in part to a 7 % increase in average U.S. rainfall in the past 50 years, said Jay Lawrimore, chief of climatic analysis for the Asheville, N.C. - based National Climactic Data Center... Brad Rippey, a U.S. Department of Agriculture meteorologist, said warming temperatures have made a big difference for crops such as corn and soybeans... For example, data from the National Agricultural Statistics Service show that in 1980, about 210,000 soybean acres were planted in North Dakota.

Regarding variability, the ISPM fails to mention that the IPCC found that the larger «natural climatic variability» is almost all in the direction of cooler temperatures, relative to «previous estimations», for the past millenium: «The additional variability shown in some new studies [since the Third Assesment Report] implies mainly cooler temperatures (predominantly in the 12th to 14th, 17th and 19th centuries), and only one new reconstruction suggests slightly warmer conditions (in the 11th century, but well within the uncertainty range indicated in the TAR).»

As if this were not daunting enough, in 2002 the US National Academies of Science not only endorsed the IPCC's conclusions but produced a new report entitled Abrupt Climate Change: Inevitable surprises, which argued that global warming may trigger «large, abrupt and unwelcome regional or global climatic events» such as severe droughts and floods.

Periodic events called El Niño and La Niña alter the circulation of warmer and cooler water in ocean currents, leading to changes in climatic patterns across large regions.

More recently in geological time, the climatic warming at the last glacial - interglacial transition was coincident with the extinction of 72 percent of the large - bodied mammals in North America, and 83 percent of the large - bodied mammals in South America — in total, 76 genera including more than 125 species for the two continents (Barnosky and Lindsey, 2010; Brook and Barnosky, 2012; Koch and Barnosky, 2006).

Superimposed on the long - term trends are occasional global warming spikes, «hyperthermals», most prominently the Palaeocene — Eocene Thermal Maximum (PETM) at approximately 56 Myr BP [12] and the Mid-Eocene Climatic Optimum at approximately 42 Myr BP [13], coincident with large temporary increases of atmospheric CO2.

But as this Holland dataset confirms, the actual empirical global and regional trends of a climatic shift of ever more severe weather events do not support the alarmists» predictions; the irrational fears of more frequent / larger weather disasters as a result of CO2 or global / regional «warming» is unjustified, per the scientific evidence.

Similarly if you change the composition of the atmosphere by introducing large quantities of a greenhouse gas that causes greater back - radiation of infra - red towards the surface of the surface from the air, then over a climatic period of time the seas will get warmer.