Sentences with phrase «periods during the past century»

The red line indicates the peak temperature anomaly of the past century, the blue line indicates the current temperature anomaly, the shaded red circles indicate periods in which temperatures were warmer than the peak warmth of the past century, and the shaded blue circles indicate periods during the past century that were colder than present.

Not exact matches

The temperature, rainfall, vapor pressure and number of months when conditions were suitable for malaria transmission, the researchers report, «have not changed significantly during the past century or during the period of reported malaria resurgence.»

Despite leaving the country during the period of Perestroika, Roiter's artistic output retains a heavy hint of his Russian past: the recurring green that recalls the pervasive Russian military, the economy of forms and materials reflective of pervasive paucity, and traces of early twentieth century Russian avant - garde influences.

Essays exploring three significant periods of experimentation in portraiture during the past century: the 1910s - 20s; 1960s, and 1990 — present have been prepared, respectively, by each of the three curators of the exhibition: Jonathan Frederick Walz, director of curatorial affairs & curator of American art, the Columbus Museum, Columbus, Georgia; Kathleen Merrill Campagnolo, independent curator and scholar, and Anne Collins Goodyear, co-director of the Bowdoin College Museum of Art.

In AR4, the relevant statement was: Average Northern Hemisphere temperatures during the second half of the 20th century were very likely higher than during any other 50 - year period in the last 500 years and likely the highest in at least the past 1,300 years..

While the observed Antarctic temperatures rose by about 0.4 degrees Fahrenheit (0.2 degrees Celsius) over the past century, the climate models simulated increases in Antarctic temperatures during the same period of 1.4 degrees F (0.75 degrees C).

[Response: Despite the evidence for rapid regional climate changes during certain past transitional periods (e.g. the Younger Dryas), there is no evidence that global mean temperature changes of the amplitude seen in the past century have occured on centennial or shorter timescales in the past.

It is very likely that average NH temperatures during the second half of the 20th century were warmer than any other 50 - year period in the last 500 years and likely the warmest in at least the past 1300 years.

The purveyors of the new eco-religion can try to deny its existence as much as they want and the fact that there is more than enough historical evidence that it was at least as warm (more likely significantly warmer) during this period of the millenial past than it may have been during the recent warming period at the end of the 20th century.

Increases in GrIS melt and runoff during this past century warm period must have been significant and were probably even larger than that of the most recent last decade (1995 - 2006).»

-------- http://iopscience.iop.org/1748-9326/8/1/014013 Predictability of twentieth century sea - level rise from past data However, in combination, the use of proxy and tide gauge sea - level data up to 1900 AD allows a good prediction of twentieth century sea - level rise, despite this rise being well outside the rates experienced in previous centuries during the calibration period of the model.

However, the Prudent Path authors fail to reference a recent paper (Kaufmann et al. 2009) which analyzed Arctic temperature changes over a 2000 year period (0 to 1999 AD) and concluded that «the most recent 10 - year interval (1999 - 2008) was the warmest of the past 200 decades» and that «4/5 of the warmest decades occurred during the last century».

Kobashi, T., et al: «We found that greenhouse gases played two important roles over the past 4000 yr for the rapid warming during the 20th century and slightly cooler temperature during the early period of the past 4000 yr»

Reviewing my post: — my introduction describes recent statements and seems accurate to me; — my account of IPCC First and Second Draft seems accurate to me and, in any event, unaffected by new papers; — likewise my comments on the SPM and gatekeeping of skeptic submissions on the discrepancy; — my observations about 20th century history also seem accurate to me and not vulnerable to new papers; — I asked questions about the long past hiatus and deep ocean during that period.

The North Atlantic Oscillation (NAO) is an important source of climate variability in the Northern Hemisphere; here, a model - tested reconstruction of the NAO for the past millennium reveals that positive NAO phases were predominant during the thirteenth and fourteenth centuries, but not during the whole medieval period.

Here, we argue that the twentieth and twenty - first centuries, a period during which the overwhelming majority of human - caused carbon emissions are likely to occur, need to be placed into a long - term context that includes the past 20 millennia, when the last Ice Age ended and human civilization developed, and the next ten millennia, over which time the projected impacts of anthropogenic climate change will grow and persist.

Many scientists are tired of the criticisms, and the IPCC concluded that it is «likely» that the second half of the twentieth century was the warmest 50 - year period in the Northern Hemisphere during the past 1,300 years.

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.

In a 2009 study, the authors used GPS measurement to correct for local vertical movement of the Earth at key tide gages, finding a «global rate of geocentric sea level rise of 1.61 ± 0.19 mm / yr over the past century» Their study shows no acceleration and no changes in rate during warm or cold periods of the last 110 years.

Argues that the twentieth and twenty - first centuries, a period during which the overwhelming majority of human - caused carbon emissions are likely to occur, need to be placed into a long - term context that includes the past 20 millennia, when the last Ice Age ended and human civilization developed, and the next ten millennia, over which time the projected impacts of anthropogenic climate change will grow and persist